diff --git a/package.json b/package.json
index 14b1299b..7be9b3f3 100644
--- a/package.json
+++ b/package.json
@@ -55,11 +55,14 @@
   },
   "devDependencies": {
     "@turf/turf": "^7.0.0",
+    "@types/node": "^24.3.0",
+    "@types/react": "^19.1.11",
     "convertapi": "^1.14.0",
     "postcss": "^8",
     "prettier": "^3.3.3",
     "react-color-palette": "^7.2.2",
     "sass": "^1.77.8",
-    "tailwindcss": "^3.4.1"
+    "tailwindcss": "^3.4.1",
+    "typescript": "^5.9.2"
   }
 }
diff --git a/src/common/common.js b/src/common/common.js
index 61fdabd1..9d15e988 100644
--- a/src/common/common.js
+++ b/src/common/common.js
@@ -13,6 +13,7 @@ export const MENU = {
     MOVEMENT_SHAPE_UPDOWN: 'movementShapeUpdown', // 동선이동.형올림내림
     OUTLINE_EDIT_OFFSET: 'outlineEditOffset', // 외벽선 편집 및 오프셋
     ROOF_SHAPE_ALLOC: 'rootShapeAlloc', // 지붕면 항당
+    ALL_REMOVE: 'allRemove', // 전체 삭제
     DEFAULT: 'roofCoveringDefault', // 아무것도 선택 안할 경우
   }, // 지붕덮개
   BATCH_CANVAS: {
diff --git a/src/components/common/input/CalcInput.jsx b/src/components/common/input/CalcInput.jsx
index 8e60506b..d0158da6 100644
--- a/src/components/common/input/CalcInput.jsx
+++ b/src/components/common/input/CalcInput.jsx
@@ -361,13 +361,6 @@ export const CalculatorInput = ({ value, onChange, label, options = {}, id, clas
               ÷
             </button>
 
-            {/* 숫자 버튼 */}
-            {[7, 8, 9, 4, 5, 6, 1, 2, 3].map((num) => (
-              <button key={num} onClick={() => handleNumber(num)} className="btn-number">
-                {num}
-              </button>
-            ))}
-
             <button onClick={() => handleOperation('×')} className="btn-operator">
               ×
             </button>
@@ -378,6 +371,12 @@ export const CalculatorInput = ({ value, onChange, label, options = {}, id, clas
               +
             </button>
 
+            {/* 숫자 버튼 */}
+            {[1,2,3,4,5,6,7,8,9].map((num) => (
+              <button key={num} onClick={() => handleNumber(num)} className="btn-number">
+                {num}
+              </button>
+            ))}
             {/* 0 버튼 */}
             <button onClick={() => handleNumber('0')} className="btn-number btn-zero">
               0
diff --git a/src/components/floor-plan/CanvasFrame.jsx b/src/components/floor-plan/CanvasFrame.jsx
index 383c0ef9..4b718c05 100644
--- a/src/components/floor-plan/CanvasFrame.jsx
+++ b/src/components/floor-plan/CanvasFrame.jsx
@@ -66,12 +66,17 @@ export default function CanvasFrame() {
         canvas?.loadFromJSON(JSON.parse(plan.canvasStatus), function () {
           canvasLoadInit() //config된 상태로 캔버스 객체를 그린다
           canvas?.renderAll() // 캔버스를 다시 그립니다.
+
           if (canvas.getObjects().filter((obj) => obj.name === POLYGON_TYPE.MODULE).length > 0) {
-            setSelectedMenu('module')
+            setTimeout(() => {
+              setSelectedMenu('module')
+            }, 500)
           } else if (canvas.getObjects().filter((obj) => obj.name === POLYGON_TYPE.WALL).length > 0) {
             setSelectedMenu('outline')
           } else {
-            setSelectedMenu('surface')
+            setTimeout(() => {
+              setSelectedMenu('surface')
+            }, 500)
           }
 
           const roofs = canvas.getObjects().filter((obj) => obj.name === POLYGON_TYPE.ROOF)
diff --git a/src/components/floor-plan/modal/flowDirection/FlowDirectionSetting.jsx b/src/components/floor-plan/modal/flowDirection/FlowDirectionSetting.jsx
index a84efccf..4c1f0991 100644
--- a/src/components/floor-plan/modal/flowDirection/FlowDirectionSetting.jsx
+++ b/src/components/floor-plan/modal/flowDirection/FlowDirectionSetting.jsx
@@ -8,6 +8,7 @@ import { usePopup } from '@/hooks/usePopup'
 import { canvasState } from '@/store/canvasAtom'
 import { usePolygon } from '@/hooks/usePolygon'
 import { useSurfaceShapeBatch } from '@/hooks/surface/useSurfaceShapeBatch'
+import { useRoofFn } from '@/hooks/common/useRoofFn'
 
 const FLOW_DIRECTION_TYPE = {
   EIGHT_AZIMUTH: 'eightAzimuth',
@@ -19,6 +20,7 @@ export default function FlowDirectionSetting(props) {
   const { id, pos = contextPopupPosition, target } = props
   const canvas = useRecoilValue(canvasState)
   const { getMessage } = useMessage()
+  const { setSurfaceShapePattern } = useRoofFn()
 
   const { changeSurfaceLineType } = useSurfaceShapeBatch({})
 
@@ -79,6 +81,7 @@ export default function FlowDirectionSetting(props) {
       surfaceCompass: orientation,
       surfaceCompassType: type,
     })
+    setSurfaceShapePattern(roof, null, null, roof.roofMaterial)
     drawDirectionArrow(roof)
     canvas?.renderAll()
     changeSurfaceLineType(roof)
diff --git a/src/hooks/common/useMenu.js b/src/hooks/common/useMenu.js
index 7836b73b..40c1b6a0 100644
--- a/src/hooks/common/useMenu.js
+++ b/src/hooks/common/useMenu.js
@@ -66,6 +66,9 @@ export default function useMenu() {
         case MENU.ROOF_COVERING.ROOF_SHAPE_ALLOC:
           addPopup(popupId, 1, <RoofAllocationSetting id={popupId} />)
           break
+        case MENU.ROOF_COVERING.ALL_REMOVE:
+          deleteAllSurfacesAndObjects()
+          break
       }
     }
 
diff --git a/src/hooks/common/useRoofFn.js b/src/hooks/common/useRoofFn.js
index fe3841f7..eb640d76 100644
--- a/src/hooks/common/useRoofFn.js
+++ b/src/hooks/common/useRoofFn.js
@@ -6,6 +6,8 @@ import { POLYGON_TYPE } from '@/common/common'
 import { useEvent } from '@/hooks/useEvent'
 import { useLine } from '@/hooks/useLine'
 import { outerLinePointsState } from '@/store/outerLineAtom'
+import { usePolygon } from '@/hooks/usePolygon'
+import { useText } from '@/hooks/useText'
 
 const ROOF_COLOR = {
   0: 'rgb(199,240,213)',
@@ -13,6 +15,7 @@ const ROOF_COLOR = {
   2: 'rgb(187,204,255)',
   3: 'rgb(228,202,255)',
 }
+
 export function useRoofFn() {
   const canvas = useRecoilValue(canvasState)
   const selectedRoofMaterial = useRecoilValue(selectedRoofMaterialSelector)
@@ -20,6 +23,8 @@ export function useRoofFn() {
   const { addCanvasMouseEventListener, initEvent } = useEvent()
   const resetPoints = useResetRecoilState(outerLinePointsState)
   const { addPitchText } = useLine()
+  const { setPolygonLinesActualSize } = usePolygon()
+  const { changeCorridorDimensionText } = useText()
 
   //면형상 선택 클릭시 지붕 패턴 입히기
   function setSurfaceShapePattern(polygon, mode = 'onlyBorder', trestleMode = false, roofMaterial, isForceChange = false, isDisplay = false) {
@@ -47,6 +52,7 @@ export function useRoofFn() {
 
       let width = (roofMaterial.width || 226) / 10
       let height = (roofMaterial.length || 158) / 10
+
       const index = roofMaterial.index ?? 0
       let roofStyle = 2
       const inputPatternSize = { width: width, height: height } //임시 사이즈
@@ -172,6 +178,8 @@ export function useRoofFn() {
       polygon.set('fill', null)
       polygon.set('fill', pattern)
       polygon.roofMaterial = roofMaterial
+      setPolygonLinesActualSize(polygon)
+      changeCorridorDimensionText()
       polygon.canvas?.renderAll()
     } catch (e) {
       console.log(e)
@@ -306,7 +314,15 @@ export function useRoofFn() {
   }
 
   function convertAbsolutePoint(area) {
-    return area.points.map((p) => fabric.util.transformPoint({ x: p.x - area.pathOffset.x, y: p.y - area.pathOffset.y }, area.calcTransformMatrix()))
+    return area.points.map((p) =>
+      fabric.util.transformPoint(
+        {
+          x: p.x - area.pathOffset.x,
+          y: p.y - area.pathOffset.y,
+        },
+        area.calcTransformMatrix(),
+      ),
+    )
   }
 
   const removeOuterLines = (currentMousePos) => {
diff --git a/src/hooks/module/useModuleBasicSetting.js b/src/hooks/module/useModuleBasicSetting.js
index 7a700dc0..933a423e 100644
--- a/src/hooks/module/useModuleBasicSetting.js
+++ b/src/hooks/module/useModuleBasicSetting.js
@@ -63,6 +63,7 @@ export function useModuleBasicSetting(tabNum) {
   const { checkModuleDisjointSurface } = useTurf()
 
   useEffect(() => {
+    initEvent()
     return () => {
       //수동 설치시 초기화
       removeMouseEvent('mouse:up')
@@ -139,7 +140,7 @@ export function useModuleBasicSetting(tabNum) {
                 roof.lines.forEach((line) => {
                   line.attributes = {
                     ...line.attributes,
-                    offset: getOffset(offsetObjects.addRoof, line, roof.pitch, roof.from),
+                    offset: getOffset(offsetObjects.addRoof, line, roof.roofMaterial.pitch),
                   }
                 })
                 //배치면 설치 영역
@@ -209,9 +210,9 @@ export function useModuleBasicSetting(tabNum) {
     const calculateHeightRate = 1 / Math.cos((degree * Math.PI) / 180)
     const calculateValue = calculateHeightRate / calculateExpression(degree)
 
-    const eavesResult = from === 'roofCover' ? (data.eavesMargin * Math.cos((degree * Math.PI) / 180)) / 10 : data.eavesMargin / 10
-    const ridgeResult = from === 'roofCover' ? (data.ridgeMargin * Math.cos((degree * Math.PI) / 180)) / 10 : data.ridgeMargin / 10
-    const kerabaMargin = from === 'roofCover' && isDiagonal ? data.kerabaMargin / calculateValue / 10 : data.kerabaMargin / 10
+    const eavesResult = +roofSizeSet === 1 ? (data.eavesMargin * Math.cos((degree * Math.PI) / 180)) / 10 : data.eavesMargin / 10
+    const ridgeResult = +roofSizeSet === 1 ? (data.ridgeMargin * Math.cos((degree * Math.PI) / 180)) / 10 : data.ridgeMargin / 10
+    const kerabaMargin = +roofSizeSet === 1 && isDiagonal ? data.kerabaMargin / calculateValue / 10 : data.kerabaMargin / 10
 
     switch (line.attributes.type) {
       case LINE_TYPE.WALLLINE.EAVES:
@@ -232,7 +233,7 @@ export function useModuleBasicSetting(tabNum) {
   //가대 상세 데이터 기준으로 모듈 설치 배치면 생성
   const makeModuleInstArea = (roof, trestleDetail) => {
     //지붕 객체 반환
-    
+
     if (tabNum == 3) {
       if (!roof) {
         return
@@ -556,7 +557,7 @@ export function useModuleBasicSetting(tabNum) {
             let tmpHeight = flowDirection === 'south' || flowDirection === 'north' ? moduleHeight : moduleWidth
 
             let { width, height } =
-              moduleSetupSurface.from === 'roofCover'
+              +roofSizeSet === 1
                 ? calculateVisibleModuleHeight(tmpWidth, tmpHeight, getDegreeByChon(moduleSetupSurfaces[i].roofMaterial.pitch), flowDirection)
                 : { width: tmpWidth, height: tmpHeight }
 
@@ -1056,11 +1057,11 @@ export function useModuleBasicSetting(tabNum) {
             let tmpHeight = flowDirection === 'south' || flowDirection === 'north' ? moduleHeight : moduleWidth
 
             width =
-              moduleSetupSurface.from === 'roofCover'
+              +roofSizeSet === 1
                 ? calculateVisibleModuleHeight(tmpWidth, tmpHeight, getDegreeByChon(moduleSetupSurfaces[i].roofMaterial.pitch), flowDirection).width
                 : tmpWidth
             height =
-              moduleSetupSurface.from === 'roofCover'
+              +roofSizeSet === 1
                 ? calculateVisibleModuleHeight(tmpWidth, tmpHeight, getDegreeByChon(moduleSetupSurfaces[i].roofMaterial.pitch), flowDirection).height
                 : tmpHeight
 
@@ -1386,11 +1387,11 @@ export function useModuleBasicSetting(tabNum) {
 
               //복시도, 실치수에 따른 모듈 높이 조정
               width =
-                trestlePolygon.from === 'roofCover'
+                +roofSizeSet === 1
                   ? calculateVisibleModuleHeight(tmpWidth, tmpHeight, getDegreeByChon(trestlePolygon.roofMaterial.pitch), flowDirection).width
                   : tmpWidth
               height =
-                trestlePolygon.from === 'roofCover'
+                +roofSizeSet === 1
                   ? calculateVisibleModuleHeight(tmpWidth, tmpHeight, getDegreeByChon(trestlePolygon.roofMaterial.pitch), flowDirection).height
                   : tmpHeight
 
@@ -2974,11 +2975,11 @@ export function useModuleBasicSetting(tabNum) {
       const pointY2 = top
 
       //디버깅
-      const finalLine = new QLine([pointX1, pointY1, pointX2, pointY2], {
-        stroke: 'red',
-        strokeWidth: 1,
-        selectable: true,
-      })
+      // const finalLine = new QLine([pointX1, pointY1, pointX2, pointY2], {
+      //   stroke: 'red',
+      //   strokeWidth: 1,
+      //   selectable: true,
+      // })
       // canvas?.add(finalLine)
       // canvas?.renderAll()
 
@@ -3106,11 +3107,11 @@ export function useModuleBasicSetting(tabNum) {
       const pointY2 = coords[2].y + ((coords[2].x - top) / (coords[2].x - coords[1].x)) * (coords[1].y - coords[2].y)
 
       //디버깅용
-      const finalLine = new QLine([pointX1, pointY1, pointX2, pointY2], {
-        stroke: 'red',
-        strokeWidth: 1,
-        selectable: true,
-      })
+      // const finalLine = new QLine([pointX1, pointY1, pointX2, pointY2], {
+      //   stroke: 'red',
+      //   strokeWidth: 1,
+      //   selectable: true,
+      // })
       // canvas?.add(finalLine)
       // canvas?.renderAll()
 
@@ -3308,7 +3309,7 @@ export function useModuleBasicSetting(tabNum) {
             let tmpHeight = flowDirection === 'south' || flowDirection === 'north' ? moduleHeight : moduleWidth
 
             let { width, height } =
-              moduleSetupSurface.from === 'roofCover'
+              +roofSizeSet === 1
                 ? calculateVisibleModuleHeight(tmpWidth, tmpHeight, getDegreeByChon(moduleSetupSurfaces[i].roofMaterial.pitch), flowDirection)
                 : { width: tmpWidth, height: tmpHeight }
 
@@ -4027,7 +4028,7 @@ export function useModuleBasicSetting(tabNum) {
         10
     }
 
-    return moduleSetupSurface.from === 'roofCover'
+    return +roofSizeSet === 1
       ? calculateVisibleModuleHeight(tmpWidth, tmpHeight, getDegreeByChon(moduleSetupSurface.roofMaterial.pitch), moduleSetupSurface.direction)
       : { width: tmpWidth, height: tmpHeight }
   }
diff --git a/src/hooks/module/useTrestle.js b/src/hooks/module/useTrestle.js
index 05325822..73fb92f8 100644
--- a/src/hooks/module/useTrestle.js
+++ b/src/hooks/module/useTrestle.js
@@ -82,7 +82,6 @@ export const useTrestle = () => {
         }
 
         let rackInfos = []
-
         if (rack) {
           rackInfos = Object.keys(rack).map((key) => {
             return { key, value: rack[key] }
@@ -2484,8 +2483,8 @@ export const useTrestle = () => {
 
   // 각도에 따른 길이 반환
   function getTrestleLength(length, degree, surface) {
-    if (surface.from !== 'roofCover') {
-      // 지붕덮개로부터 온게 아니면 그냥 length 리턴
+    if (+roofSizeSet !== 1) {
+      // 복시도 입력이 아닌경우 그냥 길이 return
       return length
     }
     const radians = (degree * Math.PI) / 180
diff --git a/src/hooks/option/useCanvasSetting.js b/src/hooks/option/useCanvasSetting.js
index e2742ff2..9b060fde 100644
--- a/src/hooks/option/useCanvasSetting.js
+++ b/src/hooks/option/useCanvasSetting.js
@@ -18,7 +18,6 @@ import {
   basicSettingState,
   correntObjectNoState,
   corridorDimensionSelector,
-  fetchRoofMaterialsState,
   roofMaterialsAtom,
   selectedRoofMaterialSelector,
   settingModalFirstOptionsState,
@@ -41,6 +40,8 @@ import { useCanvasPopupStatusController } from '@/hooks/common/useCanvasPopupSta
 import { v4 as uuidv4 } from 'uuid'
 import { useEvent } from '@/hooks/useEvent'
 import { logger } from '@/util/logger'
+import { useText } from '@/hooks/useText'
+import { usePolygon } from '@/hooks/usePolygon'
 
 const defaultDotLineGridSetting = {
   INTERVAL: {
@@ -118,7 +119,6 @@ export function useCanvasSetting(executeEffect = true) {
   const { getRoofMaterialList, getModuleTypeItemList } = useMasterController()
   const [roofMaterials, setRoofMaterials] = useRecoilState(roofMaterialsAtom)
   const [addedRoofs, setAddedRoofs] = useRecoilState(addedRoofsState)
-  const [fetchRoofMaterials, setFetchRoofMaterials] = useRecoilState(fetchRoofMaterialsState)
   const setCurrentMenu = useSetRecoilState(currentMenuState)
 
   const resetModuleSelectionData = useResetRecoilState(moduleSelectionDataState) /* 다음으로 넘어가는 최종 데이터 */
@@ -133,6 +133,9 @@ export function useCanvasSetting(executeEffect = true) {
   const { addPopup } = usePopup()
   const [popupId, setPopupId] = useState(uuidv4())
 
+  const { changeCorridorDimensionText } = useText()
+  const { setPolygonLinesActualSize } = usePolygon()
+
   const SelectOptions = [
     { id: 1, name: getMessage('modal.canvas.setting.grid.dot.line.setting.line.origin'), value: 1 },
     { id: 2, name: '1/2', value: 1 / 2 },
@@ -197,7 +200,7 @@ export function useCanvasSetting(executeEffect = true) {
     }
   }, [addedRoofs])
 
-  useEffect(() => {
+  /*useEffect(() => {
     if (!executeEffect) {
       return
     }
@@ -212,7 +215,7 @@ export function useCanvasSetting(executeEffect = true) {
       setAddedRoofs(newAddedRoofs)
     }
     setBasicSettings({ ...basicSetting, selectedRoofMaterial: selectedRoofMaterial })
-  }, [roofMaterials])
+  }, [roofMaterials])*/
 
   useEffect(() => {
     if (!canvas) {
@@ -221,39 +224,13 @@ export function useCanvasSetting(executeEffect = true) {
     if (!executeEffect) {
       return
     }
-    const { column } = corridorDimension
-    const lengthTexts = canvas.getObjects().filter((obj) => obj.name === 'lengthText')
-    const group = canvas.getObjects().filter((obj) => obj.type === 'group')
-    group.forEach((obj) => {
-      obj._objects
-        .filter((obj2) => obj2.name === 'lengthText')
-        .forEach((obj3) => {
-          lengthTexts.push(obj3)
-        })
-    })
-
-    switch (column) {
-      case 'corridorDimension':
-        lengthTexts.forEach((obj) => {
-          if (obj.planeSize) {
-            obj.set({ text: obj.planeSize.toString() })
-          }
-        })
-        break
-      case 'realDimension':
-        lengthTexts.forEach((obj) => {
-          if (obj.actualSize) {
-            obj.set({ text: obj.actualSize.toString() })
-          }
-        })
-        break
-      case 'noneDimension':
-        lengthTexts.forEach((obj) => {
-          obj.set({ text: '' })
-        })
-        break
+    const roofs = canvasObjects.filter((obj) => obj.name === POLYGON_TYPE.ROOF)
+    if (roofs.length > 0) {
+      roofs.forEach((roof) => {
+        setPolygonLinesActualSize(roof)
+      })
+      changeCorridorDimensionText()
     }
-    canvas?.renderAll()
   }, [corridorDimension])
 
   useEffect(() => {
@@ -448,17 +425,18 @@ export function useCanvasSetting(executeEffect = true) {
         }
 
         if (addRoofs.length > 0) {
-          setAddedRoofs(addRoofs)
-
-          setBasicSettings({
-            ...basicSetting,
-            roofMaterials: addRoofs[0],
-            planNo: roofsRow[0].planNo,
-            roofSizeSet: roofsRow[0].roofSizeSet,
-            roofAngleSet: roofsRow[0].roofAngleSet,
-            roofsData: roofsArray,
-            selectedRoofMaterial: addRoofs.find((roof) => roof.selected),
+          setBasicSettings((prev) => {
+            return {
+              ...basicSetting,
+              roofMaterials: addRoofs[0],
+              planNo: roofsRow[0].planNo,
+              roofSizeSet: roofsRow[0].roofSizeSet,
+              roofAngleSet: roofsRow[0].roofAngleSet,
+              roofsData: roofsArray,
+              selectedRoofMaterial: addRoofs.find((roof) => roof.selected),
+            }
           })
+          setAddedRoofs(addRoofs)
 
           setCanvasSetting({
             ...basicSetting,
diff --git a/src/hooks/roofcover/useRoofAllocationSetting.js b/src/hooks/roofcover/useRoofAllocationSetting.js
index 417286e4..3fef0ee9 100644
--- a/src/hooks/roofcover/useRoofAllocationSetting.js
+++ b/src/hooks/roofcover/useRoofAllocationSetting.js
@@ -28,6 +28,7 @@ import { outerLinePointsState } from '@/store/outerLineAtom'
 import { QcastContext } from '@/app/QcastProvider'
 import { usePlan } from '@/hooks/usePlan'
 import { roofsState } from '@/store/roofAtom'
+import { useText } from '@/hooks/useText'
 
 export function useRoofAllocationSetting(id) {
   const canvas = useRecoilValue(canvasState)
@@ -60,6 +61,7 @@ export function useRoofAllocationSetting(id) {
   const [moduleSelectionData, setModuleSelectionData] = useRecoilState(moduleSelectionDataState)
   const resetPoints = useResetRecoilState(outerLinePointsState)
   const [corridorDimension, setCorridorDimension] = useRecoilState(corridorDimensionSelector)
+  const { changeCorridorDimensionText } = useText()
 
   useEffect(() => {
     /** 배치면 초기설정에서 선택한 지붕재 배열 설정 */
@@ -127,9 +129,9 @@ export function useRoofAllocationSetting(id) {
             }
           })
         } else {
-          if(roofList.length > 0){
+          if (roofList.length > 0) {
             roofsArray = roofList
-          }else{
+          } else {
             roofsArray = [
               {
                 planNo: planNo,
@@ -188,7 +190,6 @@ export function useRoofAllocationSetting(id) {
         })
         //데이터 동기화
         setCurrentRoofList(selectRoofs)
-
       })
     } catch (error) {
       console.error('Data fetching error:', error)
@@ -459,6 +460,10 @@ export function useRoofAllocationSetting(id) {
     /** 모듈 선택 데이터 초기화 */
     // modifyModuleSelectionData()
     setModuleSelectionData({ ...moduleSelectionData, roofConstructions: newRoofList })
+
+    setTimeout(() => {
+      changeCorridorDimensionText('realDimension')
+    }, 500)
   }
 
   /**
diff --git a/src/hooks/surface/useSurfaceShapeBatch.js b/src/hooks/surface/useSurfaceShapeBatch.js
index 863de4bf..874526f8 100644
--- a/src/hooks/surface/useSurfaceShapeBatch.js
+++ b/src/hooks/surface/useSurfaceShapeBatch.js
@@ -1,9 +1,8 @@
 'use client'
 
-import { useEffect } from 'react'
-import { useRecoilState, useRecoilValue, useResetRecoilState } from 'recoil'
+import { useRecoilValue, useResetRecoilState } from 'recoil'
 import { canvasSettingState, canvasState, currentCanvasPlanState, globalPitchState } from '@/store/canvasAtom'
-import { MENU, POLYGON_TYPE, LINE_TYPE } from '@/common/common'
+import { LINE_TYPE, MENU, POLYGON_TYPE } from '@/common/common'
 import { getIntersectionPoint, toFixedWithoutRounding } from '@/util/canvas-util'
 import { degreesToRadians } from '@turf/turf'
 import { QPolygon } from '@/components/fabric/QPolygon'
@@ -20,13 +19,12 @@ import { useRoofFn } from '@/hooks/common/useRoofFn'
 import { outerLinePointsState } from '@/store/outerLineAtom'
 import { placementShapeDrawingPointsState } from '@/store/placementShapeDrawingAtom'
 import { getBackGroundImage } from '@/lib/imageActions'
-import PlacementSurfaceLineProperty from '@/components/floor-plan/modal/placementShape/PlacementSurfaceLineProperty'
-import { v4 as uuidv4 } from 'uuid'
 import { useCanvasSetting } from '@/hooks/option/useCanvasSetting'
+import { useText } from '@/hooks/useText'
 
 export function useSurfaceShapeBatch({ isHidden, setIsHidden }) {
   const { getMessage } = useMessage()
-  const { drawDirectionArrow, addPolygon } = usePolygon()
+  const { drawDirectionArrow, addPolygon, addLengthText } = usePolygon()
   const lengthTextFont = useRecoilValue(fontSelector('lengthText'))
   const resetOuterLinePoints = useResetRecoilState(outerLinePointsState)
   const resetPlacementShapeDrawingPoints = useResetRecoilState(placementShapeDrawingPointsState)
@@ -40,6 +38,7 @@ export function useSurfaceShapeBatch({ isHidden, setIsHidden }) {
   // const { addCanvasMouseEventListener, initEvent } = useContext(EventContext)
   const { addPopup, closePopup } = usePopup()
   const { setSurfaceShapePattern } = useRoofFn()
+  const { changeCorridorDimensionText } = useText()
   const currentCanvasPlan = useRecoilValue(currentCanvasPlanState)
   const { fetchSettings } = useCanvasSetting(false)
 
@@ -848,7 +847,7 @@ export function useSurfaceShapeBatch({ isHidden, setIsHidden }) {
 
       const selection = new fabric.ActiveSelection(selectionArray, {
         canvas: canvas,
-        draggable: true,
+        // draggable: true,
         lockMovementX: false, // X축 이동 허용
         lockMovementY: false, // Y축 이동 허용
         originX: 'center',
@@ -858,7 +857,7 @@ export function useSurfaceShapeBatch({ isHidden, setIsHidden }) {
       canvas.setActiveObject(selection)
 
       addCanvasMouseEventListener('mouse:up', (e) => {
-        canvas.selection = true
+        canvas.selection = false
 
         canvas.discardActiveObject() // 모든 선택 해제
         canvas.requestRenderAll() // 화면 업데이트
@@ -875,10 +874,13 @@ export function useSurfaceShapeBatch({ isHidden, setIsHidden }) {
           }
         })
 
-        canvas.renderAll()
-        roof.fire('polygonMoved')
+        // roof.fire('polygonMoved')
+        roof.fire('modified')
         drawDirectionArrow(roof)
+        changeCorridorDimensionText()
+        addLengthText(roof)
         initEvent()
+        canvas.renderAll()
       })
     }
   }
diff --git a/src/hooks/useCanvasEvent.js b/src/hooks/useCanvasEvent.js
index 2acc929f..d991a2cf 100644
--- a/src/hooks/useCanvasEvent.js
+++ b/src/hooks/useCanvasEvent.js
@@ -5,6 +5,8 @@ import { canvasSizeState, canvasState, canvasZoomState, currentMenuState, curren
 import { QPolygon } from '@/components/fabric/QPolygon'
 import { fontSelector } from '@/store/fontAtom'
 import { MENU, POLYGON_TYPE } from '@/common/common'
+import { useText } from '@/hooks/useText'
+import { usePolygon } from '@/hooks/usePolygon'
 
 // 캔버스에 필요한 이벤트
 export function useCanvasEvent() {
@@ -15,6 +17,8 @@ export function useCanvasEvent() {
   const [canvasZoom, setCanvasZoom] = useRecoilState(canvasZoomState)
   const lengthTextOption = useRecoilValue(fontSelector('lengthText'))
   const currentMenu = useRecoilValue(currentMenuState)
+  const { changeCorridorDimensionText } = useText()
+  const { setPolygonLinesActualSize } = usePolygon()
 
   useEffect(() => {
     canvas?.setZoom(canvasZoom / 100)
@@ -63,6 +67,13 @@ export function useCanvasEvent() {
         textObjs.forEach((obj) => {
           obj.bringToFront()
         })
+
+        if (target.name === POLYGON_TYPE.ROOF) {
+          setTimeout(() => {
+            setPolygonLinesActualSize(target)
+            changeCorridorDimensionText()
+          }, 300)
+        }
       }
 
       if (target.name === 'cell') {
@@ -116,48 +127,6 @@ export function useCanvasEvent() {
             target.setControlVisible(controlKey, false)
           })
         })
-        /*target.on('editing:exited', () => {
-          if (isNaN(target.text.trim())) {
-            target.set({ text: previousValue })
-            canvas?.renderAll()
-            return
-          }
-          const updatedValue = parseFloat(target.text.trim())
-          const targetParent = target.parent
-          const points = targetParent.getCurrentPoints()
-          const i = target.idx // Assuming target.index gives the index of the point
-
-          const startPoint = points[i]
-          const endPoint = points[(i + 1) % points.length]
-
-          const dx = endPoint.x - startPoint.x
-          const dy = endPoint.y - startPoint.y
-
-          const currentLength = Math.sqrt(dx * dx + dy * dy)
-          const scaleFactor = updatedValue / currentLength
-
-          const newEndPoint = {
-            x: startPoint.x + dx * scaleFactor,
-            y: startPoint.y + dy * scaleFactor,
-          }
-
-          const newPoints = [...points]
-          newPoints[(i + 1) % points.length] = newEndPoint
-
-          for (let idx = i + 1; idx < points.length; idx++) {
-            if (newPoints[idx].x === endPoint.x) {
-              newPoints[idx].x = newEndPoint.x
-            } else if (newPoints[idx].y === endPoint.y) {
-              newPoints[idx].y = newEndPoint.y
-            }
-          }
-
-          const newPolygon = new QPolygon(newPoints, targetParent.initOptions)
-          canvas?.add(newPolygon)
-          canvas?.remove(targetParent)
-          canvas?.renderAll()
-        })*/
-
         target.on('moving', (e) => {
           target.uuid = uuidv4()
 
diff --git a/src/hooks/useLine.js b/src/hooks/useLine.js
index 9d1a48eb..58f87e7d 100644
--- a/src/hooks/useLine.js
+++ b/src/hooks/useLine.js
@@ -1,15 +1,18 @@
 import { useRecoilValue } from 'recoil'
 import {
-  ANGLE_TYPE,
   canvasState,
   currentAngleTypeSelector,
   fontFamilyState,
   fontSizeState,
+  globalPitchState,
   pitchTextSelector,
   showAngleUnitSelector,
 } from '@/store/canvasAtom'
 import { QLine } from '@/components/fabric/QLine'
-import { getChonByDegree, getDegreeByChon } from '@/util/canvas-util'
+import { basicSettingState } from '@/store/settingAtom'
+import { calcLineActualSize } from '@/util/qpolygon-utils'
+import { getDegreeByChon } from '@/util/canvas-util'
+import { useText } from '@/hooks/useText'
 
 export const useLine = () => {
   const canvas = useRecoilValue(canvasState)
@@ -18,6 +21,10 @@ export const useLine = () => {
   const currentAngleType = useRecoilValue(currentAngleTypeSelector)
   const pitchText = useRecoilValue(pitchTextSelector)
   const angleUnit = useRecoilValue(showAngleUnitSelector)
+  const roofSizeSet = useRecoilValue(basicSettingState).roofSizeSet
+  const globalPitch = useRecoilValue(globalPitchState)
+
+  const { changeCorridorDimensionText } = useText()
 
   const addLine = (points = [], options) => {
     const line = new QLine(points, {
@@ -151,6 +158,57 @@ export const useLine = () => {
       })
   }
 
+  /**
+   * 복도치수, 실제치수에 따라 actualSize를 설정한다.
+   * @param line
+   * @param direction polygon의 방향
+   * @param pitch
+   */
+  const setActualSize = (line, direction, pitch = globalPitch) => {
+    const { x1, y1, x2, y2 } = line
+
+    const isHorizontal = y1 === y2
+    const isVertical = x1 === x2
+    const isDiagonal = !isHorizontal && !isVertical
+    const lineLength = line.getLength()
+
+    line.attributes = { ...line.attributes, planeSize: line.getLength(), actualSize: line.getLength() }
+
+    if (+roofSizeSet === 1) {
+      if (direction === 'south' || direction === 'north') {
+        if (isVertical) {
+          line.attributes = {
+            ...line.attributes,
+            actualSize: calcLineActualSize(line, getDegreeByChon(pitch)),
+          }
+        } else if (isDiagonal) {
+          const yLength = Math.abs(y2 - y1) * 10
+
+          const h = yLength * Math.tan(getDegreeByChon(pitch) * (Math.PI / 180))
+
+          const actualSize = Math.sqrt(h ** 2 + lineLength ** 2)
+          line.attributes = { ...line.attributes, actualSize: actualSize }
+        }
+      } else if (direction === 'west' || direction === 'east') {
+        if (isHorizontal) {
+          line.attributes = {
+            ...line.attributes,
+            actualSize: calcLineActualSize(line, getDegreeByChon(pitch)),
+          }
+        } else if (isDiagonal) {
+          const xLength = Math.abs(x2 - x1) * 10
+
+          const h = xLength * Math.tan(getDegreeByChon(pitch) * (Math.PI / 180))
+
+          const actualSize = Math.sqrt(h ** 2 + lineLength ** 2)
+          line.attributes = { ...line.attributes, actualSize: actualSize }
+        }
+      }
+    }
+
+    line.attributes = { ...line.attributes, actualSize: Number(line.attributes.actualSize.toFixed(0)) }
+  }
+
   return {
     addLine,
     removeLine,
@@ -160,5 +218,6 @@ export const useLine = () => {
     removePitchText,
     addPitchTextsByOuterLines,
     getLengthByLine,
+    setActualSize,
   }
 }
diff --git a/src/hooks/usePolygon.js b/src/hooks/usePolygon.js
index 12d7e188..a1cbc4f0 100644
--- a/src/hooks/usePolygon.js
+++ b/src/hooks/usePolygon.js
@@ -4,7 +4,7 @@ import { fabric } from 'fabric'
 import { calculateIntersection, findAndRemoveClosestPoint, getDegreeByChon, getDegreeInOrientation, isPointOnLine } from '@/util/canvas-util'
 import { QPolygon } from '@/components/fabric/QPolygon'
 import { isSamePoint, removeDuplicatePolygons } from '@/util/qpolygon-utils'
-import { flowDisplaySelector } from '@/store/settingAtom'
+import { basicSettingState, flowDisplaySelector } from '@/store/settingAtom'
 import { fontSelector } from '@/store/fontAtom'
 import { QLine } from '@/components/fabric/QLine'
 import { LINE_TYPE, POLYGON_TYPE } from '@/common/common'
@@ -18,6 +18,9 @@ export const usePolygon = () => {
   const currentAngleType = useRecoilValue(currentAngleTypeSelector)
   const pitchText = useRecoilValue(pitchTextSelector)
   const globalPitch = useRecoilValue(globalPitchState)
+  const roofSizeSet = useRecoilValue(basicSettingState).roofSizeSet
+
+  const { setActualSize } = useLine()
 
   const { getLengthByLine } = useLine()
 
@@ -86,27 +89,30 @@ export const usePolygon = () => {
       const maxY = line.top + line.length
       const degree = (Math.atan2(y2 - y1, x2 - x1) * 180) / Math.PI
 
-      const text = new fabric.Textbox(planeSize ? planeSize.toString() : length.toString(), {
-        left: left,
-        top: top,
-        fontSize: lengthTextFontOptions.fontSize.value,
-        minX,
-        maxX,
-        minY,
-        maxY,
-        parentDirection: line.direction,
-        parentDegree: degree,
-        parentId: polygon.id,
-        planeSize: planeSize ?? length,
-        actualSize: actualSize ?? length,
-        editable: false,
-        selectable: true,
-        lockRotation: true,
-        lockScalingX: true,
-        lockScalingY: true,
-        parent: polygon,
-        name: 'lengthText',
-      })
+      const text = new fabric.Textbox(
+        +roofSizeSet === 1 ? (actualSize ? actualSize.toString() : length.toString()) : planeSize ? planeSize.toString() : length.toString(),
+        {
+          left: left,
+          top: top,
+          fontSize: lengthTextFontOptions.fontSize.value,
+          minX,
+          maxX,
+          minY,
+          maxY,
+          parentDirection: line.direction,
+          parentDegree: degree,
+          parentId: polygon.id,
+          planeSize: planeSize ?? length,
+          actualSize: actualSize ?? length,
+          editable: false,
+          selectable: true,
+          lockRotation: true,
+          lockScalingX: true,
+          lockScalingY: true,
+          parent: polygon,
+          name: 'lengthText',
+        },
+      )
       polygon.texts.push(text)
       canvas.add(text)
     })
@@ -921,12 +927,69 @@ export const usePolygon = () => {
       }
       return !shouldRemove
     })
-    
+
     // 중복된 라인들을 canvas에서 제거
     linesToRemove.forEach((line) => {
       canvas.remove(line)
     })
 
+    // innerLines가 합쳐졌을 때 polygonLine과 같은 경우 그 polygonLine의 need를 false로 변경
+    const mergeOverlappingInnerLines = (lines) => {
+      const mergedLines = []
+      const processed = new Set()
+
+      lines.forEach((line, index) => {
+        if (processed.has(index)) return
+
+        let currentLine = { ...line }
+        processed.add(index)
+
+        // 현재 라인과 겹치는 다른 라인들을 찾아서 합치기
+        for (let i = index + 1; i < lines.length; i++) {
+          if (processed.has(i)) continue
+
+          const otherLine = lines[i]
+          if (checkLineOverlap(currentLine, otherLine)) {
+            // 두 라인을 합치기 - 가장 긴 범위로 확장
+            const isVertical = Math.abs(currentLine.x1 - currentLine.x2) < 1
+
+            if (isVertical) {
+              const allYPoints = [currentLine.y1, currentLine.y2, otherLine.y1, otherLine.y2]
+              currentLine.y1 = Math.min(...allYPoints)
+              currentLine.y2 = Math.max(...allYPoints)
+              currentLine.x1 = currentLine.x2 = (currentLine.x1 + otherLine.x1) / 2
+            } else {
+              const allXPoints = [currentLine.x1, currentLine.x2, otherLine.x1, otherLine.x2]
+              currentLine.x1 = Math.min(...allXPoints)
+              currentLine.x2 = Math.max(...allXPoints)
+              currentLine.y1 = currentLine.y2 = (currentLine.y1 + otherLine.y1) / 2
+            }
+
+            processed.add(i)
+          }
+        }
+
+        mergedLines.push(currentLine)
+      })
+
+      return mergedLines
+    }
+
+    const mergedInnerLines = mergeOverlappingInnerLines(innerLines)
+
+    // 합쳐진 innerLine과 동일한 polygonLine의 need를 false로 설정
+    polygonLines.forEach((polygonLine) => {
+      mergedInnerLines.forEach((mergedInnerLine) => {
+        const isSameLine =
+          (isSamePoint(polygonLine.startPoint, mergedInnerLine.startPoint) && isSamePoint(polygonLine.endPoint, mergedInnerLine.endPoint)) ||
+          (isSamePoint(polygonLine.startPoint, mergedInnerLine.endPoint) && isSamePoint(polygonLine.endPoint, mergedInnerLine.startPoint))
+
+        if (isSameLine) {
+          polygonLine.need = false
+        }
+      })
+    })
+
     canvas.renderAll()
 
     /*polygonLines.forEach((line) => {
@@ -934,6 +997,7 @@ export const usePolygon = () => {
       canvas.add(line)
     })
     canvas.renderAll()*/
+    polygonLines = polygonLines.filter((line) => line.need)
 
     polygonLines.forEach((line) => {
       /*const originStroke = line.stroke
@@ -1589,8 +1653,8 @@ export const usePolygon = () => {
     const remainingLines = [...allLines] // 사용 가능한 line들의 복사본
 
     // isStart가 true인 line들만 시작점으로 사용
-    const startLines = remainingLines.filter(line => line.attributes?.isStart === true)
-    
+    const startLines = remainingLines.filter((line) => line.attributes?.isStart === true)
+
     startLines.forEach((startLine) => {
       // 현재 남아있는 line들로 그래프 생성
       const graph = {}
@@ -1615,13 +1679,13 @@ export const usePolygon = () => {
 
       const startPoint = { ...startLine.startPoint } // 시작점
       let arrivalPoint = { ...startLine.endPoint } // 도착점
-      
+
       const roof = getPath(startPoint, arrivalPoint, graph)
       if (roof.length > 0) {
         roofs.push(roof)
-        
+
         // 사용된 startLine을 remainingLines에서 제거
-        const startLineIndex = remainingLines.findIndex(line => line === startLine)
+        const startLineIndex = remainingLines.findIndex((line) => line === startLine)
         if (startLineIndex !== -1) {
           remainingLines.splice(startLineIndex, 1)
         }
@@ -1675,6 +1739,22 @@ export const usePolygon = () => {
     canvas.renderAll()
   }
 
+  /**
+   * 폴리곤의 라인 속성을 복도치수, 실제치수에 따라 actualSize 설정
+   * @param polygon
+   */
+  const setPolygonLinesActualSize = (polygon) => {
+    if (!polygon.lines || polygon.lines.length === 0 || !polygon.roofMaterial) {
+      return
+    }
+
+    polygon.lines.forEach((line) => {
+      setActualSize(line, polygon.direction, +polygon.roofMaterial?.pitch)
+    })
+
+    addLengthText(polygon)
+  }
+
   return {
     addPolygon,
     addPolygonByLines,
@@ -1683,5 +1763,6 @@ export const usePolygon = () => {
     addLengthText,
     splitPolygonWithLines,
     splitPolygonWithSeparate,
+    setPolygonLinesActualSize,
   }
 }
diff --git a/src/hooks/useText.js b/src/hooks/useText.js
new file mode 100644
index 00000000..134ade4a
--- /dev/null
+++ b/src/hooks/useText.js
@@ -0,0 +1,51 @@
+import { useRecoilValue } from 'recoil'
+import { corridorDimensionSelector } from '@/store/settingAtom'
+import { canvasState } from '@/store/canvasAtom'
+
+export function useText() {
+  const canvas = useRecoilValue(canvasState)
+  const corridorDimension = useRecoilValue(corridorDimensionSelector)
+
+  const changeCorridorDimensionText = (columnText) => {
+    let { column } = corridorDimension
+    if (columnText) {
+      column = columnText
+    }
+    const lengthTexts = canvas.getObjects().filter((obj) => obj.name === 'lengthText')
+    const group = canvas.getObjects().filter((obj) => obj.type === 'group')
+    group.forEach((obj) => {
+      obj._objects
+        .filter((obj2) => obj2.name === 'lengthText')
+        .forEach((obj3) => {
+          lengthTexts.push(obj3)
+        })
+    })
+
+    switch (column) {
+      case 'corridorDimension':
+        lengthTexts.forEach((obj) => {
+          if (obj.planeSize) {
+            obj.set({ text: obj.planeSize.toString() })
+          }
+        })
+        break
+      case 'realDimension':
+        lengthTexts.forEach((obj) => {
+          if (obj.actualSize) {
+            obj.set({ text: obj.actualSize.toString() })
+          }
+        })
+        break
+      case 'noneDimension':
+        lengthTexts.forEach((obj) => {
+          obj.set({ text: '' })
+        })
+        break
+    }
+    canvas?.renderAll()
+  }
+
+  return {
+    changeCorridorDimensionText,
+  }
+}
diff --git a/src/lib/skeletons/Circular/CircularList.ts b/src/lib/skeletons/Circular/CircularList.ts
new file mode 100644
index 00000000..690f5e5f
--- /dev/null
+++ b/src/lib/skeletons/Circular/CircularList.ts
@@ -0,0 +1,113 @@
+import CircularNode from "./CircularNode";
+
+export interface ICircularList {
+	readonly Size: number;
+
+	AddNext(node: CircularNode, newNode: CircularNode): void;
+
+	AddPrevious(node: CircularNode, newNode: CircularNode): void;
+
+	AddLast(node: CircularNode): void;
+
+	Remove(node: CircularNode): void;
+}
+
+export default class CircularList<T extends CircularNode> implements ICircularList {
+	private _first: T = null;
+	private _size: number = 0;
+
+	public AddNext(node: CircularNode, newNode: CircularNode) {
+		if (newNode.List !== null)
+			throw new Error("Node is already assigned to different list!");
+
+		newNode.List = this;
+
+		newNode.Previous = node;
+		newNode.Next = node.Next;
+
+		node.Next.Previous = newNode;
+		node.Next = newNode;
+
+		this._size++;
+	}
+
+	AddPrevious(node: CircularNode, newNode: CircularNode) {
+		if (newNode.List !== null)
+			throw new Error("Node is already assigned to different list!");
+
+		newNode.List = this;
+
+		newNode.Previous = node.Previous;
+		newNode.Next = node;
+
+		node.Previous.Next = newNode;
+		node.Previous = newNode;
+
+		this._size++;
+	}
+
+	AddLast(node: CircularNode) {
+		if (node.List !== null)
+			throw new Error("Node is already assigned to different list!");
+
+		if (this._first === null) {
+			this._first = node as T;
+
+			node.List = this;
+			node.Next = node;
+			node.Previous = node;
+
+			this._size++;
+		} else
+			this.AddPrevious(this._first, node);
+	}
+
+	Remove(node: CircularNode) {
+		if (node.List !== this)
+			throw new Error("Node is not assigned to this list!");
+
+		if (this._size <= 0)
+			throw new Error("List is empty can't remove!");
+
+		node.List = null;
+
+		if (this._size === 1)
+			this._first = null;
+
+		else {
+			if (this._first === node)
+				this._first = <T>this._first.Next;
+
+			node.Previous.Next = node.Next;
+			node.Next.Previous = node.Previous;
+		}
+
+		node.Previous = null;
+		node.Next = null;
+
+		this._size--;
+	}
+
+	public get Size(): number {
+		return this._size;
+	}
+
+	public First(): T {
+		return this._first;
+	}
+
+	public* Iterate(): Generator<T> {
+		let current = this._first;
+		let i = 0;
+
+		while (current !== null) {
+			yield current;
+
+			if (++i === this.Size) {
+				return;
+			}
+
+			current = <T>current.Next;
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Circular/CircularNode.ts b/src/lib/skeletons/Circular/CircularNode.ts
new file mode 100644
index 00000000..cfbda42a
--- /dev/null
+++ b/src/lib/skeletons/Circular/CircularNode.ts
@@ -0,0 +1,19 @@
+import {ICircularList} from "./CircularList";
+
+export default class CircularNode {
+	public List: ICircularList = null;
+	public Next: CircularNode = null;
+	public Previous: CircularNode = null;
+
+	public AddNext(node: CircularNode) {
+		this.List.AddNext(this, node);
+	}
+
+	public AddPrevious(node: CircularNode) {
+		this.List.AddPrevious(this, node);
+	}
+
+	public Remove() {
+		this.List.Remove(this);
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Circular/Edge.ts b/src/lib/skeletons/Circular/Edge.ts
new file mode 100644
index 00000000..a7620f57
--- /dev/null
+++ b/src/lib/skeletons/Circular/Edge.ts
@@ -0,0 +1,28 @@
+import CircularNode from "./CircularNode";
+import Vector2d from "../Primitives/Vector2d";
+import LineLinear2d from "../Primitives/LineLinear2d";
+import LineParametric2d from "../Primitives/LineParametric2d";
+
+export default class Edge extends CircularNode {
+	public readonly Begin: Vector2d;
+	public readonly End: Vector2d;
+	public readonly Norm: Vector2d;
+
+	public readonly LineLinear2d: LineLinear2d;
+	public BisectorNext: LineParametric2d = null;
+	public BisectorPrevious: LineParametric2d = null;
+
+	constructor(begin: Vector2d, end: Vector2d) {
+		super();
+
+		this.Begin = begin;
+		this.End = end;
+
+		this.LineLinear2d = new LineLinear2d(begin, end);
+		this.Norm = end.Sub(begin).Normalized();
+	}
+
+	public ToString(): string {
+		return `Edge [p1=${this.Begin}, p2=${this.End}]`;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Circular/Vertex.ts b/src/lib/skeletons/Circular/Vertex.ts
new file mode 100644
index 00000000..2b82a6f0
--- /dev/null
+++ b/src/lib/skeletons/Circular/Vertex.ts
@@ -0,0 +1,39 @@
+import CircularNode from "./CircularNode";
+import Vector2d from "../Primitives/Vector2d";
+import LineParametric2d from "../Primitives/LineParametric2d";
+import Edge from "./Edge";
+import {FaceNode} from "../Path/FaceNode";
+
+export default class Vertex extends CircularNode {
+	readonly RoundDigitCount = 5;
+
+	public Point: Vector2d = null;
+	public readonly Distance: number;
+	public readonly Bisector: LineParametric2d = null;
+
+	public readonly NextEdge: Edge = null;
+	public readonly PreviousEdge: Edge = null;
+
+	public LeftFace: FaceNode = null;
+	public RightFace: FaceNode = null;
+
+	public IsProcessed: boolean;
+
+	constructor(point: Vector2d, distance: number, bisector: LineParametric2d, previousEdge: Edge, nextEdge: Edge) {
+		super();
+
+		this.Point = point;
+		this.Distance = +distance.toFixed(this.RoundDigitCount);
+		this.Bisector = bisector;
+		this.PreviousEdge = previousEdge;
+		this.NextEdge = nextEdge;
+
+		this.IsProcessed = false;
+	}
+
+	public ToString(): string {
+		return "Vertex [v=" + this.Point + ", IsProcessed=" + this.IsProcessed +
+			", Bisector=" + this.Bisector + ", PreviousEdge=" + this.PreviousEdge +
+			", NextEdge=" + this.NextEdge;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/EdgeResult.ts b/src/lib/skeletons/EdgeResult.ts
new file mode 100644
index 00000000..c95ba235
--- /dev/null
+++ b/src/lib/skeletons/EdgeResult.ts
@@ -0,0 +1,13 @@
+import Edge from "./Circular/Edge";
+import Vector2d from "./Primitives/Vector2d";
+import {List} from "./Utils";
+
+export default class EdgeResult {
+	public readonly Edge: Edge;
+	public readonly Polygon: List<Vector2d>;
+
+	constructor(edge: Edge, polygon: List<Vector2d>) {
+		this.Edge = edge;
+		this.Polygon = polygon;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/Chains/ChainType.ts b/src/lib/skeletons/Events/Chains/ChainType.ts
new file mode 100644
index 00000000..70b63170
--- /dev/null
+++ b/src/lib/skeletons/Events/Chains/ChainType.ts
@@ -0,0 +1,7 @@
+enum ChainType {
+	Edge,
+	ClosedEdge,
+	Split
+}
+
+export default ChainType;
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/Chains/EdgeChain.ts b/src/lib/skeletons/Events/Chains/EdgeChain.ts
new file mode 100644
index 00000000..f25efbaf
--- /dev/null
+++ b/src/lib/skeletons/Events/Chains/EdgeChain.ts
@@ -0,0 +1,40 @@
+import IChain from "./IChain";
+import EdgeEvent from "../EdgeEvent";
+import {List} from "../../Utils";
+import Edge from "../../Circular/Edge";
+import Vertex from "../../Circular/Vertex";
+import ChainType from "./ChainType";
+
+export default class EdgeChain implements IChain {
+	private readonly _closed: boolean;
+	public EdgeList: List<EdgeEvent>;
+
+	constructor(edgeList: List<EdgeEvent>) {
+		this.EdgeList = edgeList;
+		this._closed = this.PreviousVertex === this.NextVertex;
+	}
+
+	public get PreviousEdge(): Edge {
+		return this.EdgeList[0].PreviousVertex.PreviousEdge;
+	}
+
+	public get NextEdge(): Edge {
+		return this.EdgeList[this.EdgeList.Count - 1].NextVertex.NextEdge;
+	}
+
+	public get PreviousVertex(): Vertex {
+		return this.EdgeList[0].PreviousVertex;
+	}
+
+	public get NextVertex(): Vertex {
+		return this.EdgeList[this.EdgeList.Count - 1].NextVertex;
+	}
+
+	public get CurrentVertex(): Vertex {
+		return null;
+	}
+
+	public get ChainType(): ChainType {
+		return this._closed ? ChainType.ClosedEdge : ChainType.Edge;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/Chains/IChain.ts b/src/lib/skeletons/Events/Chains/IChain.ts
new file mode 100644
index 00000000..59d22bf5
--- /dev/null
+++ b/src/lib/skeletons/Events/Chains/IChain.ts
@@ -0,0 +1,17 @@
+import Edge from "../../Circular/Edge";
+import Vertex from "../../Circular/Vertex";
+import ChainType from "./ChainType";
+
+export default interface IChain {
+	get PreviousEdge(): Edge;
+
+	get NextEdge(): Edge;
+
+	get PreviousVertex(): Vertex;
+
+	get NextVertex(): Vertex;
+
+	get CurrentVertex(): Vertex;
+
+	get ChainType(): ChainType;
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/Chains/SingleEdgeChain.ts b/src/lib/skeletons/Events/Chains/SingleEdgeChain.ts
new file mode 100644
index 00000000..305cdd2b
--- /dev/null
+++ b/src/lib/skeletons/Events/Chains/SingleEdgeChain.ts
@@ -0,0 +1,40 @@
+import IChain from "./IChain";
+import Edge from "../../Circular/Edge";
+import Vertex from "../../Circular/Vertex";
+import ChainType from "./ChainType";
+
+export default class SingleEdgeChain implements IChain {
+	private readonly _nextVertex: Vertex;
+	private readonly _oppositeEdge: Edge;
+	private readonly _previousVertex: Vertex;
+
+	constructor(oppositeEdge: Edge, nextVertex: Vertex) {
+		this._oppositeEdge = oppositeEdge;
+		this._nextVertex = nextVertex;
+		this._previousVertex = nextVertex.Previous as Vertex;
+	}
+
+	public get PreviousEdge(): Edge {
+		return this._oppositeEdge;
+	}
+
+	public get NextEdge(): Edge {
+		return this._oppositeEdge;
+	}
+
+	public get PreviousVertex(): Vertex {
+		return this._previousVertex;
+	}
+
+	public get NextVertex(): Vertex {
+		return this._nextVertex;
+	}
+
+	public get CurrentVertex(): Vertex {
+		return null;
+	}
+
+	public get ChainType(): ChainType {
+		return ChainType.Split;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/Chains/SplitChain.ts b/src/lib/skeletons/Events/Chains/SplitChain.ts
new file mode 100644
index 00000000..8cc0e522
--- /dev/null
+++ b/src/lib/skeletons/Events/Chains/SplitChain.ts
@@ -0,0 +1,45 @@
+import IChain from "./IChain";
+import Edge from "../../Circular/Edge";
+import Vertex from "../../Circular/Vertex";
+import ChainType from "./ChainType";
+import VertexSplitEvent from "../VertexSplitEvent";
+import SplitEvent from "../SplitEvent";
+
+export default class SplitChain implements IChain {
+	private readonly _splitEvent: SplitEvent;
+
+	constructor(event: SplitEvent) {
+		this._splitEvent = event;
+	}
+
+	public get OppositeEdge(): Edge {
+		if (!(this._splitEvent instanceof VertexSplitEvent))
+			return this._splitEvent.OppositeEdge;
+
+		return null;
+	}
+
+	public get PreviousEdge(): Edge {
+		return this._splitEvent.Parent.PreviousEdge;
+	}
+
+	public get NextEdge(): Edge {
+		return this._splitEvent.Parent.NextEdge;
+	}
+
+	public get PreviousVertex(): Vertex {
+		return this._splitEvent.Parent.Previous as Vertex;
+	}
+
+	public get NextVertex(): Vertex {
+		return this._splitEvent.Parent.Next as Vertex;
+	}
+
+	public get CurrentVertex(): Vertex {
+		return this._splitEvent.Parent;
+	}
+
+	public get ChainType(): ChainType {
+		return ChainType.Split;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/EdgeEvent.ts b/src/lib/skeletons/Events/EdgeEvent.ts
new file mode 100644
index 00000000..c9d53446
--- /dev/null
+++ b/src/lib/skeletons/Events/EdgeEvent.ts
@@ -0,0 +1,27 @@
+import SkeletonEvent from "./SkeletonEvent";
+import Vertex from "../Circular/Vertex";
+import Vector2d from "../Primitives/Vector2d";
+
+export default class EdgeEvent extends SkeletonEvent {
+	public readonly NextVertex: Vertex;
+	public readonly PreviousVertex: Vertex;
+
+	public override get IsObsolete(): boolean {
+		return this.PreviousVertex.IsProcessed || this.NextVertex.IsProcessed;
+	}
+
+	constructor(point: Vector2d, distance: number, previousVertex: Vertex, nextVertex: Vertex) {
+		super(point, distance);
+
+		this.PreviousVertex = previousVertex;
+		this.NextVertex = nextVertex;
+	}
+
+	public override ToString(): string {
+		return "EdgeEvent [V=" + this.V + ", PreviousVertex="
+			+ (this.PreviousVertex !== null ? this.PreviousVertex.Point.ToString() : "null") +
+			", NextVertex="
+			+ (this.NextVertex !== null ? this.NextVertex.Point.ToString() : "null") + ", Distance=" +
+			this.Distance + "]";
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/MultiEdgeEvent.ts b/src/lib/skeletons/Events/MultiEdgeEvent.ts
new file mode 100644
index 00000000..e990eb71
--- /dev/null
+++ b/src/lib/skeletons/Events/MultiEdgeEvent.ts
@@ -0,0 +1,17 @@
+import SkeletonEvent from "./SkeletonEvent";
+import Vector2d from "../Primitives/Vector2d";
+import EdgeChain from "./Chains/EdgeChain";
+
+export default class MultiEdgeEvent extends SkeletonEvent {
+	public readonly Chain: EdgeChain;
+
+	public override get IsObsolete(): boolean {
+		return false;
+	}
+
+	constructor(point: Vector2d, distance: number, chain: EdgeChain) {
+		super(point, distance);
+
+		this.Chain = chain;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/MultiSplitEvent.ts b/src/lib/skeletons/Events/MultiSplitEvent.ts
new file mode 100644
index 00000000..48df17bf
--- /dev/null
+++ b/src/lib/skeletons/Events/MultiSplitEvent.ts
@@ -0,0 +1,18 @@
+import SkeletonEvent from "./SkeletonEvent";
+import {List} from "../Utils";
+import IChain from "./Chains/IChain";
+import Vector2d from "../Primitives/Vector2d";
+
+export default class MultiSplitEvent extends SkeletonEvent {
+	public readonly Chains: List<IChain>;
+
+	public override get IsObsolete(): boolean {
+		return false;
+	}
+
+	constructor(point: Vector2d, distance: number, chains: List<IChain>) {
+		super(point, distance);
+
+		this.Chains = chains;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/PickEvent.ts b/src/lib/skeletons/Events/PickEvent.ts
new file mode 100644
index 00000000..f27e502d
--- /dev/null
+++ b/src/lib/skeletons/Events/PickEvent.ts
@@ -0,0 +1,17 @@
+import SkeletonEvent from "./SkeletonEvent";
+import Vector2d from "../Primitives/Vector2d";
+import EdgeChain from "./Chains/EdgeChain";
+
+export default class PickEvent extends SkeletonEvent {
+	public readonly Chain: EdgeChain;
+
+	public override get IsObsolete(): boolean {
+		return false;
+	}
+
+	constructor(point: Vector2d, distance: number, chain: EdgeChain) {
+		super(point, distance);
+
+		this.Chain = chain;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/SkeletonEvent.ts b/src/lib/skeletons/Events/SkeletonEvent.ts
new file mode 100644
index 00000000..2f1add90
--- /dev/null
+++ b/src/lib/skeletons/Events/SkeletonEvent.ts
@@ -0,0 +1,22 @@
+import Vector2d from "../Primitives/Vector2d";
+
+export default abstract class SkeletonEvent {
+	public V: Vector2d = null;
+
+	public Distance: number;
+
+	public abstract get IsObsolete(): boolean;
+
+	protected constructor(point: Vector2d, distance: number) {
+		this.V = point;
+		this.Distance = distance;
+	}
+
+	public ToString(): string {
+		return "IntersectEntry [V=" + this.V + ", Distance=" + this.Distance + "]";
+	}
+
+	public GetType(): string {
+		return this.constructor.name;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/SplitEvent.ts b/src/lib/skeletons/Events/SplitEvent.ts
new file mode 100644
index 00000000..c7736dba
--- /dev/null
+++ b/src/lib/skeletons/Events/SplitEvent.ts
@@ -0,0 +1,26 @@
+import SkeletonEvent from "./SkeletonEvent";
+import Edge from "../Circular/Edge";
+import Vertex from "../Circular/Vertex";
+import Vector2d from "../Primitives/Vector2d";
+
+export default class SplitEvent extends SkeletonEvent {
+	public readonly OppositeEdge: Edge = null;
+	public readonly Parent: Vertex = null;
+
+	constructor(point: Vector2d, distance: number, parent: Vertex, oppositeEdge: Edge) {
+		super(point, distance);
+
+		this.Parent = parent;
+		this.OppositeEdge = oppositeEdge;
+	}
+
+	public override get IsObsolete(): boolean {
+		return this.Parent.IsProcessed;
+	}
+
+
+	public override ToString(): string {
+		return "SplitEvent [V=" + this.V + ", Parent=" + (this.Parent !== null ? this.Parent.Point.ToString() : "null") +
+			", Distance=" + this.Distance + "]";
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Events/VertexSplitEvent.ts b/src/lib/skeletons/Events/VertexSplitEvent.ts
new file mode 100644
index 00000000..4ea89d71
--- /dev/null
+++ b/src/lib/skeletons/Events/VertexSplitEvent.ts
@@ -0,0 +1,15 @@
+import SplitEvent from "./SplitEvent";
+import Vector2d from "../Primitives/Vector2d";
+import Vertex from "../Circular/Vertex";
+
+export default class VertexSplitEvent extends SplitEvent {
+	constructor(point: Vector2d, distance: number, parent: Vertex) {
+		super(point, distance, parent, null);
+	}
+
+	public override ToString(): string {
+		return "VertexSplitEvent [V=" + this.V + ", Parent=" +
+			(this.Parent !== null ? this.Parent.Point.ToString() : "null")
+			+ ", Distance=" + this.Distance + "]";
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/LavUtil.ts b/src/lib/skeletons/LavUtil.ts
new file mode 100644
index 00000000..d067dbbe
--- /dev/null
+++ b/src/lib/skeletons/LavUtil.ts
@@ -0,0 +1,56 @@
+import Vertex from "./Circular/Vertex";
+import {List} from "./Utils";
+import CircularList from "./Circular/CircularList";
+
+export default class LavUtil {
+	public static IsSameLav(v1: Vertex, v2: Vertex): boolean {
+		if (v1.List === null || v2.List === null)
+			return false;
+		return v1.List === v2.List;
+	}
+
+	public static RemoveFromLav(vertex: Vertex) {
+		if (vertex === null || vertex.List === null)
+			return;
+		vertex.Remove();
+	}
+
+	public static CutLavPart(startVertex: Vertex, endVertex: Vertex): List<Vertex> {
+		const ret = new List<Vertex>();
+		const size = startVertex.List.Size;
+		let next = startVertex;
+
+		for (let i = 0; i < size; i++) {
+			const current = next;
+			next = current.Next as Vertex;
+			current.Remove();
+			ret.Add(current);
+
+			if (current === endVertex)
+				return ret;
+		}
+
+		throw new Error("End vertex can't be found in start vertex lav");
+	}
+
+	public static MergeBeforeBaseVertex(base: Vertex, merged: Vertex) {
+		const size = merged.List.Size;
+
+		for (let i = 0; i < size; i++) {
+			const nextMerged = merged.Next as Vertex;
+			nextMerged.Remove();
+
+			base.AddPrevious(nextMerged);
+		}
+	}
+
+	public static MoveAllVertexToLavEnd(vertex: Vertex, newLaw: CircularList<Vertex>) {
+		const size = vertex.List.Size;
+		for (let i = 0; i < size; i++) {
+			const ver = vertex;
+			vertex = vertex.Next as Vertex;
+			ver.Remove();
+			newLaw.AddLast(ver);
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Path/FaceNode.ts b/src/lib/skeletons/Path/FaceNode.ts
new file mode 100644
index 00000000..891704fa
--- /dev/null
+++ b/src/lib/skeletons/Path/FaceNode.ts
@@ -0,0 +1,24 @@
+import PathQueueNode from "./PathQueueNode";
+import Vertex from "../Circular/Vertex";
+import FaceQueue from "./FaceQueue";
+
+export class FaceNode extends PathQueueNode<FaceNode> {
+	public readonly Vertex: Vertex = null;
+
+	constructor(vertex: Vertex) {
+		super();
+		this.Vertex = vertex;
+	}
+
+	public get FaceQueue(): FaceQueue {
+		return <FaceQueue>this.List;
+	}
+
+	public get IsQueueUnconnected(): boolean {
+		return this.FaceQueue.IsUnconnected;
+	}
+
+	public QueueClose() {
+		this.FaceQueue.Close();
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Path/FaceQueue.ts b/src/lib/skeletons/Path/FaceQueue.ts
new file mode 100644
index 00000000..ae6d7a11
--- /dev/null
+++ b/src/lib/skeletons/Path/FaceQueue.ts
@@ -0,0 +1,24 @@
+import PathQueue from "./PathQueue";
+import {FaceNode} from "./FaceNode";
+import PathQueueNode from "./PathQueueNode";
+import Edge from "../Circular/Edge";
+
+export default class FaceQueue extends PathQueue<FaceNode> {
+	public Edge: Edge = null;
+	public Closed: boolean = false;
+
+	public get IsUnconnected(): boolean {
+		return this.Edge === null;
+	}
+
+	public override AddPush(node: PathQueueNode<FaceNode>, newNode: PathQueueNode<FaceNode>) {
+		if (this.Closed)
+			throw new Error("Can't add node to closed FaceQueue");
+
+		super.AddPush(node, newNode);
+	}
+
+	public Close() {
+		this.Closed = true;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Path/FaceQueueUtil.ts b/src/lib/skeletons/Path/FaceQueueUtil.ts
new file mode 100644
index 00000000..d9313c65
--- /dev/null
+++ b/src/lib/skeletons/Path/FaceQueueUtil.ts
@@ -0,0 +1,39 @@
+import {FaceNode} from "./FaceNode";
+
+export default class FaceQueueUtil {
+	public static ConnectQueues(firstFace: FaceNode, secondFace: FaceNode) {
+		if (firstFace.List === null)
+			throw new Error("firstFace.list cannot be null.");
+		if (secondFace.List === null)
+			throw new Error("secondFace.list cannot be null.");
+
+		if (firstFace.List === secondFace.List) {
+			if (!firstFace.IsEnd || !secondFace.IsEnd)
+				throw new Error("try to connect the same list not on end nodes");
+
+			if (firstFace.IsQueueUnconnected || secondFace.IsQueueUnconnected)
+				throw new Error("can't close node queue not conected with edges");
+
+			firstFace.QueueClose();
+			return;
+		}
+
+		if (!firstFace.IsQueueUnconnected && !secondFace.IsQueueUnconnected)
+			throw new Error(
+				"can't connect two diffrent queues if each of them is connected to edge");
+
+		if (!firstFace.IsQueueUnconnected) {
+			const qLeft = secondFace.FaceQueue;
+			this.MoveNodes(firstFace, secondFace);
+			qLeft.Close();
+		} else {
+			const qRight = firstFace.FaceQueue;
+			this.MoveNodes(secondFace, firstFace);
+			qRight.Close();
+		}
+	}
+
+	private static MoveNodes(firstFace: FaceNode, secondFace: FaceNode) {
+		firstFace.AddQueue(secondFace);
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Path/PathQueue.ts b/src/lib/skeletons/Path/PathQueue.ts
new file mode 100644
index 00000000..2e619599
--- /dev/null
+++ b/src/lib/skeletons/Path/PathQueue.ts
@@ -0,0 +1,103 @@
+import PathQueueNode from "./PathQueueNode";
+
+export default class PathQueue<T extends PathQueueNode<T>> {
+	public Size: number = 0;
+	public First: PathQueueNode<T> = null;
+
+	public AddPush(node: PathQueueNode<T>, newNode: PathQueueNode<T>) {
+		if (newNode.List !== null)
+			throw new Error("Node is already assigned to different list!");
+
+		if (node.Next !== null && node.Previous !== null)
+			throw new Error("Can't push new node. Node is inside a Quere. " +
+				"New node can by added only at the end of queue.");
+
+		newNode.List = this;
+		this.Size++;
+
+		if (node.Next === null) {
+			newNode.Previous = node;
+			newNode.Next = null;
+
+			node.Next = newNode;
+		} else {
+			newNode.Previous = null;
+			newNode.Next = node;
+
+			node.Previous = newNode;
+		}
+	}
+
+	public AddFirst(node: T) {
+		if (node.List !== null)
+			throw new Error("Node is already assigned to different list!");
+
+		if (this.First === null) {
+			this.First = node;
+
+			node.List = this;
+			node.Next = null;
+			node.Previous = null;
+
+			this.Size++;
+		} else
+			throw new Error("First element already exist!");
+	}
+
+	public Pop(node: PathQueueNode<T>): PathQueueNode<T> {
+		if (node.List !== this)
+			throw new Error("Node is not assigned to this list!");
+
+		if (this.Size <= 0)
+			throw new Error("List is empty can't remove!");
+
+		if (!node.IsEnd)
+			throw new Error("Can pop only from end of queue!");
+
+		node.List = null;
+
+		let previous: PathQueueNode<T> = null;
+
+		if (this.Size === 1)
+			this.First = null;
+		else {
+			if (this.First === node) {
+				if (node.Next !== null)
+					this.First = node.Next;
+				else if (node.Previous !== null)
+					this.First = node.Previous;
+				else
+					throw new Error("Ups ?");
+			}
+			if (node.Next !== null) {
+				node.Next.Previous = null;
+				previous = node.Next;
+			} else if (node.Previous !== null) {
+				node.Previous.Next = null;
+				previous = node.Previous;
+			}
+		}
+
+		node.Previous = null;
+		node.Next = null;
+
+		this.Size--;
+
+		return previous;
+	}
+
+	public* Iterate(): Generator<T> {
+		let current: T = <T>(this.First !== null ? this.First.FindEnd() : null);
+		let i = 0;
+
+		while (current !== null)
+		{
+			yield current;
+
+			if (++i === this.Size)
+				return;
+
+			current = <T>current.Next;
+		}
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Path/PathQueueNode.ts b/src/lib/skeletons/Path/PathQueueNode.ts
new file mode 100644
index 00000000..c1ec25de
--- /dev/null
+++ b/src/lib/skeletons/Path/PathQueueNode.ts
@@ -0,0 +1,51 @@
+import PathQueue from "./PathQueue";
+
+export default class PathQueueNode<T extends PathQueueNode<T>> {
+	public List: PathQueue<T> = null;
+	public Next: PathQueueNode<T> = null;
+	public Previous: PathQueueNode<T> = null;
+
+	public get IsEnd(): boolean {
+		return this.Next === null || this.Previous === null;
+	}
+
+	public AddPush(node: PathQueueNode<T>) {
+		this.List.AddPush(this, node);
+	}
+
+	public AddQueue(queue: PathQueueNode<T>): PathQueueNode<T> {
+		if (this.List === queue.List)
+			return null;
+
+		let currentQueue: PathQueueNode<T> = this;
+
+		let current = queue;
+
+		while (current !== null) {
+			const next = current.Pop();
+
+			currentQueue.AddPush(current);
+			currentQueue = current;
+
+			current = next;
+		}
+
+		return currentQueue;
+	}
+
+	public FindEnd(): PathQueueNode<T> {
+		if (this.IsEnd)
+			return this;
+
+		let current: PathQueueNode<T> = this;
+
+		while (current.Previous !== null)
+			current = current.Previous;
+
+		return current;
+	}
+
+	public Pop(): PathQueueNode<T> {
+		return this.List.Pop(this);
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Primitives/LineLinear2d.ts b/src/lib/skeletons/Primitives/LineLinear2d.ts
new file mode 100644
index 00000000..fbefcc07
--- /dev/null
+++ b/src/lib/skeletons/Primitives/LineLinear2d.ts
@@ -0,0 +1,41 @@
+import Vector2d from "./Vector2d";
+
+export default class LineLinear2d {
+	public A: number;
+	public B: number;
+	public C: number;
+
+	constructor(pP1: Vector2d = Vector2d.Empty, pP2: Vector2d = Vector2d.Empty) {
+		this.A = pP1.Y - pP2.Y;
+		this.B = pP2.X - pP1.X;
+		this.C = pP1.X * pP2.Y - pP2.X * pP1.Y;
+	}
+
+	public SetFromCoefficients(a: number, b: number, c: number): LineLinear2d {
+		this.A = a;
+		this.B = b;
+		this.C = c;
+
+		return this;
+	}
+
+	public Collide(pLine: LineLinear2d): Vector2d {
+		return LineLinear2d.Collide(this, pLine);
+	}
+
+	public static Collide(pLine1: LineLinear2d, pLine2: LineLinear2d): Vector2d {
+		return LineLinear2d.CollideCoeff(pLine1.A, pLine1.B, pLine1.C, pLine2.A, pLine2.B, pLine2.C);
+	}
+
+	public static CollideCoeff(A1: number, B1: number, C1: number, A2: number, B2: number, C2: number): Vector2d {
+		const WAB = A1 * B2 - A2 * B1;
+		const WBC = B1 * C2 - B2 * C1;
+		const WCA = C1 * A2 - C2 * A1;
+
+		return WAB === 0 ? Vector2d.Empty : new Vector2d(WBC / WAB, WCA / WAB);
+	}
+
+	public Contains(point: Vector2d): boolean {
+		return Math.abs((point.X * this.A + point.Y * this.B + this.C)) < Number.EPSILON;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Primitives/LineParametric2d.ts b/src/lib/skeletons/Primitives/LineParametric2d.ts
new file mode 100644
index 00000000..ed70353f
--- /dev/null
+++ b/src/lib/skeletons/Primitives/LineParametric2d.ts
@@ -0,0 +1,47 @@
+import Vector2d from "./Vector2d";
+import LineLinear2d from "./LineLinear2d";
+import PrimitiveUtils from "./PrimitiveUtils";
+
+export default class LineParametric2d {
+	public static readonly Empty: LineParametric2d = new LineParametric2d(Vector2d.Empty, Vector2d.Empty);
+
+	public A: Vector2d = null;
+	public U: Vector2d = null;
+
+	constructor(pA: Vector2d, pU: Vector2d) {
+		this.A = pA;
+		this.U = pU;
+	}
+
+	public CreateLinearForm(): LineLinear2d {
+		const x = this.A.X;
+		const y = this.A.Y;
+
+		const B = -this.U.X;
+		const A = this.U.Y;
+
+		const C = -(A * x + B * y);
+
+		return new LineLinear2d().SetFromCoefficients(A, B, C);
+	}
+
+	public static Collide(ray: LineParametric2d, line: LineLinear2d, epsilon: number): Vector2d {
+		const collide = LineLinear2d.Collide(ray.CreateLinearForm(), line);
+		if (collide.Equals(Vector2d.Empty)) {
+			return Vector2d.Empty;
+		}
+
+		const collideVector = collide.Sub(ray.A);
+		return ray.U.Dot(collideVector) < epsilon ? Vector2d.Empty : collide;
+	}
+
+	public IsOnLeftSite(point: Vector2d, epsilon: number): boolean {
+		const direction = point.Sub(this.A);
+		return PrimitiveUtils.OrthogonalRight(this.U).Dot(direction) < epsilon;
+	}
+
+	public IsOnRightSite(point: Vector2d, epsilon: number): boolean {
+		const direction = point.Sub(this.A);
+		return PrimitiveUtils.OrthogonalRight(this.U).Dot(direction) > -epsilon;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Primitives/PrimitiveUtils.ts b/src/lib/skeletons/Primitives/PrimitiveUtils.ts
new file mode 100644
index 00000000..0520026d
--- /dev/null
+++ b/src/lib/skeletons/Primitives/PrimitiveUtils.ts
@@ -0,0 +1,241 @@
+import Vector2d from "./Vector2d";
+import LineParametric2d from "./LineParametric2d";
+import {List} from "../Utils";
+
+class IntersectPoints {
+	public readonly Intersect: Vector2d = null;
+	public readonly IntersectEnd: Vector2d = null;
+
+	constructor(intersect?: Vector2d, intersectEnd?: Vector2d) {
+		if (!intersect) {
+			intersect = Vector2d.Empty;
+		}
+
+		if (!intersectEnd) {
+			intersectEnd = Vector2d.Empty;
+		}
+
+		this.Intersect = intersect;
+		this.IntersectEnd = intersectEnd;
+	}
+}
+
+
+export default class PrimitiveUtils {
+	public static FromTo(begin: Vector2d, end: Vector2d): Vector2d {
+		return new Vector2d(end.X - begin.X, end.Y - begin.Y);
+	}
+
+	public static OrthogonalLeft(v: Vector2d): Vector2d {
+		return new Vector2d(-v.Y, v.X);
+	}
+
+	public static OrthogonalRight(v: Vector2d): Vector2d {
+		return new Vector2d(v.Y, -v.X);
+	}
+
+	public static OrthogonalProjection(unitVector: Vector2d, vectorToProject: Vector2d): Vector2d {
+		const n = new Vector2d(unitVector.X, unitVector.Y).Normalized();
+
+		const px = vectorToProject.X;
+		const py = vectorToProject.Y;
+
+		const ax = n.X;
+		const ay = n.Y;
+
+		return new Vector2d(px * ax * ax + py * ax * ay, px * ax * ay + py * ay * ay);
+	}
+
+	public static BisectorNormalized(norm1: Vector2d, norm2: Vector2d): Vector2d {
+		const e1v = PrimitiveUtils.OrthogonalLeft(norm1);
+		const e2v = PrimitiveUtils.OrthogonalLeft(norm2);
+
+		if (norm1.Dot(norm2) > 0)
+			return e1v.Add(e2v);
+
+		let ret = new Vector2d(norm1.X, norm1.Y);
+		ret.Negate();
+		ret = ret.Add(norm2);
+
+		if (e1v.Dot(norm2) < 0)
+			ret.Negate();
+
+		return ret;
+	}
+
+	private static readonly SmallNum = 0.00000001;
+
+	private static readonly Empty: IntersectPoints = new IntersectPoints();
+
+	public static IsPointOnRay(point: Vector2d, ray: LineParametric2d, epsilon: number): boolean {
+		const rayDirection = new Vector2d(ray.U.X, ray.U.Y).Normalized();
+
+		const pointVector = point.Sub(ray.A);
+
+		let dot = rayDirection.Dot(pointVector);
+
+		if (dot < epsilon)
+			return false;
+
+		const x = rayDirection.X;
+		rayDirection.X = rayDirection.Y;
+		rayDirection.Y = -x;
+
+		dot = rayDirection.Dot(pointVector);
+
+		return -epsilon < dot && dot < epsilon;
+	}
+
+	public static IntersectRays2D(r1: LineParametric2d, r2: LineParametric2d): IntersectPoints {
+		const s1p0 = r1.A;
+		const s1p1 = r1.A.Add(r1.U);
+
+		const s2p0 = r2.A;
+
+		const u = r1.U;
+		const v = r2.U;
+
+		const w = s1p0.Sub(s2p0);
+		const d = PrimitiveUtils.Perp(u, v);
+
+		if (Math.abs(d) < PrimitiveUtils.SmallNum) {
+			if (PrimitiveUtils.Perp(u, w) !== 0 || PrimitiveUtils.Perp(v, w) !== 0)
+				return PrimitiveUtils.Empty;
+
+			const du = PrimitiveUtils.Dot(u, u);
+			const dv = PrimitiveUtils.Dot(v, v);
+
+			if (du === 0 && dv === 0) {
+				if (s1p0.NotEquals(s2p0))
+					return PrimitiveUtils.Empty;
+
+				return new IntersectPoints(s1p0);
+			}
+			if (du === 0) {
+				if (!PrimitiveUtils.InCollinearRay(s1p0, s2p0, v))
+					return PrimitiveUtils.Empty;
+
+				return new IntersectPoints(s1p0);
+			}
+			if (dv === 0) {
+				if (!PrimitiveUtils.InCollinearRay(s2p0, s1p0, u))
+					return PrimitiveUtils.Empty;
+
+				return new IntersectPoints(s2p0);
+			}
+
+			let t0, t1;
+			var w2 = s1p1.Sub(s2p0);
+			if (v.X !== 0) {
+				t0 = w.X / v.X;
+				t1 = w2.X / v.X;
+			} else {
+				t0 = w.Y / v.Y;
+				t1 = w2.Y / v.Y;
+			}
+			if (t0 > t1) {
+				const t = t0;
+				t0 = t1;
+				t1 = t;
+			}
+			if (t1 < 0)
+				return PrimitiveUtils.Empty;
+
+			t0 = t0 < 0 ? 0 : t0;
+
+			if (t0 === t1) {
+				let I0 = new Vector2d(v.X, v.Y);
+				I0 = I0.MultiplyScalar(t0);
+				I0 = I0.Add(s2p0);
+
+				return new IntersectPoints(I0);
+			}
+
+			let I_0 = new Vector2d(v.X, v.Y);
+			I_0 = I_0.MultiplyScalar(t0);
+			I_0 = I_0.Add(s2p0);
+
+			let I1 = new Vector2d(v.X, v.Y);
+			I1 = I1.MultiplyScalar(t1);
+			I1 = I1.Add(s2p0);
+
+			return new IntersectPoints(I_0, I1);
+		}
+
+		const sI = PrimitiveUtils.Perp(v, w) / d;
+		if (sI < 0 /* || sI > 1 */)
+			return PrimitiveUtils.Empty;
+
+		const tI = PrimitiveUtils.Perp(u, w) / d;
+		if (tI < 0 /* || tI > 1 */)
+			return PrimitiveUtils.Empty;
+
+		let IO = new Vector2d(u.X, u.Y);
+		IO = IO.MultiplyScalar(sI);
+		IO = IO.Add(s1p0);
+
+		return new IntersectPoints(IO);
+	}
+
+	private static InCollinearRay(p: Vector2d, rayStart: Vector2d, rayDirection: Vector2d): boolean {
+		const collideVector = p.Sub(rayStart);
+		const dot = rayDirection.Dot(collideVector);
+
+		return !(dot < 0);
+	}
+
+	private static Dot(u: Vector2d, v: Vector2d): number {
+		return u.Dot(v);
+	}
+
+	private static Perp(u: Vector2d, v: Vector2d): number {
+		return u.X * v.Y - u.Y * v.X;
+	}
+
+	public static IsClockwisePolygon(polygon: List<Vector2d>): boolean {
+		return PrimitiveUtils.Area(polygon) < 0;
+	}
+
+	private static Area(polygon: List<Vector2d>): number {
+		const n = polygon.Count;
+		let A = 0;
+		for (let p = n - 1, q = 0; q < n; p = q++)
+			A += polygon[p].X * polygon[q].Y - polygon[q].X * polygon[p].Y;
+
+		return A * 0.5;
+	}
+
+	public static MakeCounterClockwise(polygon: List<Vector2d>): List<Vector2d> {
+		if (PrimitiveUtils.IsClockwisePolygon(polygon))
+			polygon.Reverse();
+
+		return polygon;
+	}
+
+	public static IsPointInsidePolygon(point: Vector2d, points: List<Vector2d>): boolean {
+		const numpoints = points.Count;
+
+		if (numpoints < 3)
+			return false;
+
+		let it = 0;
+		const first = points[it];
+		let oddNodes = false;
+
+		for (let i = 0; i < numpoints; i++) {
+			const node1 = points[it];
+			it++;
+			const node2 = i === numpoints - 1 ? first : points[it];
+
+			const x = point.X;
+			const y = point.Y;
+
+			if (node1.Y < y && node2.Y >= y || node2.Y < y && node1.Y >= y) {
+				if (node1.X + (y - node1.Y) / (node2.Y - node1.Y) * (node2.X - node1.X) < x)
+					oddNodes = !oddNodes;
+			}
+		}
+
+		return oddNodes;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Primitives/PriorityQueue.ts b/src/lib/skeletons/Primitives/PriorityQueue.ts
new file mode 100644
index 00000000..5010defa
--- /dev/null
+++ b/src/lib/skeletons/Primitives/PriorityQueue.ts
@@ -0,0 +1,63 @@
+import {IComparer, List} from "../Utils";
+
+export default class PriorityQueue<T> {
+	private readonly _comparer: IComparer<T> = null;
+	private readonly _heap: List<T> = null;
+
+	constructor(capacity: number, comparer: IComparer<T>) {
+		this._heap = new List<T>(capacity);
+		this._comparer = comparer;
+	}
+
+	public Clear() {
+		this._heap.Clear();
+	}
+
+	public Add(item: T) {
+		let n = this._heap.Count;
+		this._heap.Add(item);
+		while (n !== 0) {
+			const p = Math.floor(n / 2);
+			if (this._comparer.Compare(this._heap[n], (this._heap[p])) >= 0) break;
+			const tmp: T = this._heap[n];
+			this._heap[n] = this._heap[p];
+			this._heap[p] = tmp;
+			n = p;
+		}
+	}
+
+	get Count(): number {
+		return this._heap.Count;
+	}
+
+	get Empty(): boolean {
+		return this._heap.Count === 0;
+	}
+
+	public Peek(): T {
+		return !this._heap.Any() ? null : this._heap[0];
+	}
+
+	public Next(): T {
+		const val: T = this._heap[0];
+		const nMax = this._heap.Count - 1;
+		this._heap[0] = this._heap[nMax];
+		this._heap.RemoveAt(nMax);
+
+		let p = 0;
+		while (true) {
+			let c = p * 2;
+			if (c >= nMax) break;
+
+			if (c + 1 < nMax && this._comparer.Compare(this._heap[c + 1], this._heap[c]) < 0) c++;
+
+			if (this._comparer.Compare(this._heap[p], (this._heap[c])) <= 0) break;
+
+			const tmp: T = this._heap[p];
+			this._heap[p] = this._heap[c];
+			this._heap[c] = tmp;
+			p = c;
+		}
+		return val;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Primitives/Vector2d.ts b/src/lib/skeletons/Primitives/Vector2d.ts
new file mode 100644
index 00000000..eb2359e1
--- /dev/null
+++ b/src/lib/skeletons/Primitives/Vector2d.ts
@@ -0,0 +1,61 @@
+export default class Vector2d {
+	public static Empty: Vector2d = new Vector2d(Number.MIN_VALUE, Number.MIN_VALUE);
+
+	public X: number = 0;
+	public Y: number = 0;
+
+	constructor(x: number, y: number) {
+		this.X = x;
+		this.Y = y;
+	}
+
+	public Negate() {
+		this.X = -this.X;
+		this.Y = -this.Y;
+	}
+
+	public DistanceTo(var1: Vector2d): number {
+		const var2 = this.X - var1.X;
+		const var4 = this.Y - var1.Y;
+		return Math.sqrt(var2 * var2 + var4 * var4);
+	}
+
+	public Normalized(): Vector2d {
+		const var1 = 1 / Math.sqrt(this.X * this.X + this.Y * this.Y);
+		return new Vector2d(this.X * var1, this.Y * var1);
+	}
+
+	public Dot(var1: Vector2d): number {
+		return this.X * var1.X + this.Y * var1.Y;
+	}
+
+	public DistanceSquared(var1: Vector2d): number {
+		const var2 = this.X - var1.X;
+		const var4 = this.Y - var1.Y;
+		return var2 * var2 + var4 * var4;
+	}
+
+	public Add(v: Vector2d): Vector2d {
+		return new Vector2d(this.X + v.X, this.Y + v.Y);
+	}
+
+	public Sub(v: Vector2d): Vector2d {
+		return new Vector2d(this.X - v.X, this.Y - v.Y);
+	}
+
+	public MultiplyScalar(scale: number): Vector2d {
+		return new Vector2d(this.X * scale, this.Y * scale);
+	}
+
+	public Equals(v: Vector2d): boolean {
+		return this.X === v.X && this.Y === v.Y;
+	}
+
+	public NotEquals(v: Vector2d): boolean {
+		return !this.Equals(v);
+	}
+
+	public ToString(): string {
+		return `${this.X}, ${this.Y}`;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/Skeleton.ts b/src/lib/skeletons/Skeleton.ts
new file mode 100644
index 00000000..6f013afd
--- /dev/null
+++ b/src/lib/skeletons/Skeleton.ts
@@ -0,0 +1,13 @@
+import Vector2d from "./Primitives/Vector2d";
+import EdgeResult from "./EdgeResult";
+import {Dictionary, List} from "./Utils";
+
+export class Skeleton {
+	public readonly Edges: List<EdgeResult> = null;
+	public readonly Distances: Dictionary<Vector2d, number> = null;
+
+	constructor(edges: List<EdgeResult>, distances: Dictionary<Vector2d, number>) {
+		this.Edges = edges;
+		this.Distances = distances;
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/SkeletonBuilder.ts b/src/lib/skeletons/SkeletonBuilder.ts
new file mode 100644
index 00000000..01ddb95b
--- /dev/null
+++ b/src/lib/skeletons/SkeletonBuilder.ts
@@ -0,0 +1,994 @@
+import {Skeleton} from "./Skeleton";
+import {HashSet, List, IComparer, Dictionary, GeoJSONMultipolygon} from "./Utils";
+import Vector2d from "./Primitives/Vector2d";
+import PriorityQueue from "./Primitives/PriorityQueue";
+import Edge from "./Circular/Edge";
+import Vertex from "./Circular/Vertex";
+import CircularList from "./Circular/CircularList";
+import FaceQueue from "./Path/FaceQueue";
+import SkeletonEvent from "./Events/SkeletonEvent";
+import FaceQueueUtil from "./Path/FaceQueueUtil";
+import LavUtil from "./LavUtil";
+import IChain from "./Events/Chains/IChain";
+import PrimitiveUtils from "./Primitives/PrimitiveUtils";
+import LineParametric2d from "./Primitives/LineParametric2d";
+import {FaceNode} from "./Path/FaceNode";
+import MultiEdgeEvent from "./Events/MultiEdgeEvent";
+import EdgeEvent from "./Events/EdgeEvent";
+import PickEvent from "./Events/PickEvent";
+import MultiSplitEvent from "./Events/MultiSplitEvent";
+import SingleEdgeChain from "./Events/Chains/SingleEdgeChain";
+import SplitChain from "./Events/Chains/SplitChain";
+import SplitEvent from "./Events/SplitEvent";
+import VertexSplitEvent from "./Events/VertexSplitEvent";
+import EdgeChain from "./Events/Chains/EdgeChain";
+import LineLinear2d from "./Primitives/LineLinear2d";
+import EdgeResult from "./EdgeResult";
+import ChainType from "./Events/Chains/ChainType";
+
+export default class SkeletonBuilder {
+	private static readonly SplitEpsilon = 1e-10;
+
+	public static BuildFromGeoJSON(multipolygon: GeoJSONMultipolygon): Skeleton {
+		const allEdges: List<EdgeResult> = new List();
+		const allDistances: Dictionary<Vector2d, number> = new Dictionary();
+
+		for (const polygon of multipolygon) {
+			if (polygon.length > 0) {
+				const outer = this.ListFromCoordinatesArray(polygon[0]);
+				const holes: List<List<Vector2d>> = new List();
+
+				for (let i = 1; i < polygon.length; i++) {
+					holes.Add(this.ListFromCoordinatesArray(polygon[i]));
+				}
+
+				const skeleton = this.Build(outer, holes);
+
+				for (const edge of skeleton.Edges) {
+					allEdges.Add(edge);
+				}
+
+				for (const [key, distance] of skeleton.Distances.entries()) {
+					allDistances.Add(key, distance);
+				}
+			}
+		}
+
+		return new Skeleton(allEdges, allDistances);
+	}
+
+	private static ListFromCoordinatesArray(arr: [number, number][]): List<Vector2d> {
+		const list: List<Vector2d> = new List();
+
+		for (const [x, y] of arr) {
+			list.Add(new Vector2d(x, y));
+		}
+
+		return list;
+	}
+
+	public static Build(polygon: List<Vector2d>, holes: List<List<Vector2d>> = null): Skeleton {
+		polygon = this.InitPolygon(polygon);
+		holes = this.MakeClockwise(holes);
+
+		const queue = new PriorityQueue<SkeletonEvent>(3, new SkeletonEventDistanseComparer());
+		const sLav = new HashSet<CircularList<Vertex>>();
+		const faces = new List<FaceQueue>();
+		const edges = new List<Edge>();
+
+		this.InitSlav(polygon, sLav, edges, faces);
+
+		if (holes !== null) {
+			for (const inner of holes) {
+				this.InitSlav(inner, sLav, edges, faces);
+			}
+		}
+
+		this.InitEvents(sLav, queue, edges);
+
+		let count = 0;
+		while (!queue.Empty) {
+			count = this.AssertMaxNumberOfInteraction(count);
+			const levelHeight = queue.Peek().Distance;
+
+			for (const event of this.LoadAndGroupLevelEvents(queue)) {
+				if (event.IsObsolete)
+					continue;
+
+				if (event instanceof EdgeEvent)
+					throw new Error("All edge@events should be converted to MultiEdgeEvents for given level");
+				if (event instanceof SplitEvent)
+					throw new Error("All split events should be converted to MultiSplitEvents for given level");
+				if (event instanceof MultiSplitEvent)
+					this.MultiSplitEvent(<MultiSplitEvent>event, sLav, queue, edges);
+				else if (event instanceof PickEvent)
+					this.PickEvent(<PickEvent>event);
+				else if (event instanceof MultiEdgeEvent)
+					this.MultiEdgeEvent(<MultiEdgeEvent>event, queue, edges);
+				else
+					throw new Error("Unknown event type: " + event.GetType());
+			}
+
+			this.ProcessTwoNodeLavs(sLav);
+			this.RemoveEventsUnderHeight(queue, levelHeight);
+			this.RemoveEmptyLav(sLav);
+		}
+
+		return this.AddFacesToOutput(faces);
+	}
+
+	private static InitPolygon(polygon: List<Vector2d>): List<Vector2d> {
+		if (polygon === null)
+			throw new Error("polygon can't be null");
+
+		if (polygon[0].Equals(polygon[polygon.Count - 1]))
+			throw new Error("polygon can't start and end with the same point");
+
+		return this.MakeCounterClockwise(polygon);
+	}
+
+	private static ProcessTwoNodeLavs(sLav: HashSet<CircularList<Vertex>>) {
+		for (const lav of sLav) {
+			if (lav.Size === 2) {
+				const first = lav.First();
+				const last = first.Next as Vertex;
+
+				FaceQueueUtil.ConnectQueues(first.LeftFace, last.RightFace);
+				FaceQueueUtil.ConnectQueues(first.RightFace, last.LeftFace);
+
+				first.IsProcessed = true;
+				last.IsProcessed = true;
+
+				LavUtil.RemoveFromLav(first);
+				LavUtil.RemoveFromLav(last);
+			}
+		}
+	}
+
+	private static RemoveEmptyLav(sLav: HashSet<CircularList<Vertex>>) {
+		sLav.RemoveWhere(circularList => circularList.Size === 0);
+	}
+
+	private static MultiEdgeEvent(event: MultiEdgeEvent, queue: PriorityQueue<SkeletonEvent>, edges: List<Edge>) {
+		const center = event.V;
+		const edgeList = event.Chain.EdgeList;
+
+		const previousVertex = event.Chain.PreviousVertex;
+		previousVertex.IsProcessed = true;
+
+		const nextVertex = event.Chain.NextVertex;
+		nextVertex.IsProcessed = true;
+
+		const bisector = this.CalcBisector(center, previousVertex.PreviousEdge, nextVertex.NextEdge);
+		const edgeVertex = new Vertex(center, event.Distance, bisector, previousVertex.PreviousEdge,
+			nextVertex.NextEdge);
+
+		this.AddFaceLeft(edgeVertex, previousVertex);
+
+		this.AddFaceRight(edgeVertex, nextVertex);
+
+		previousVertex.AddPrevious(edgeVertex);
+
+		this.AddMultiBackFaces(edgeList, edgeVertex);
+
+		this.ComputeEvents(edgeVertex, queue, edges);
+	}
+
+	private static AddMultiBackFaces(edgeList: List<EdgeEvent>, edgeVertex: Vertex) {
+		for (const edgeEvent of edgeList) {
+			const leftVertex = edgeEvent.PreviousVertex;
+			leftVertex.IsProcessed = true;
+			LavUtil.RemoveFromLav(leftVertex);
+
+			const rightVertex = edgeEvent.NextVertex;
+			rightVertex.IsProcessed = true;
+			LavUtil.RemoveFromLav(rightVertex);
+
+			this.AddFaceBack(edgeVertex, leftVertex, rightVertex);
+		}
+	}
+
+	private static PickEvent(event: PickEvent) {
+		const center = event.V;
+		const edgeList = event.Chain.EdgeList;
+
+		const vertex = new Vertex(center, event.Distance, LineParametric2d.Empty, null, null);
+		vertex.IsProcessed = true;
+
+		this.AddMultiBackFaces(edgeList, vertex);
+	}
+
+	private static MultiSplitEvent(event: MultiSplitEvent, sLav: HashSet<CircularList<Vertex>>, queue: PriorityQueue<SkeletonEvent>, edges: List<Edge>) {
+		const chains = event.Chains;
+		const center = event.V;
+
+		this.CreateOppositeEdgeChains(sLav, chains, center);
+
+		chains.Sort(new ChainComparer(center));
+
+		let lastFaceNode: FaceNode = null;
+
+		let edgeListSize = chains.Count;
+		for (let i = 0; i < edgeListSize; i++) {
+			const chainBegin = chains[i];
+			const chainEnd = chains[(i + 1) % edgeListSize];
+
+			const newVertex = this.CreateMultiSplitVertex(chainBegin.NextEdge, chainEnd.PreviousEdge, center, event.Distance);
+
+			const beginNextVertex = chainBegin.NextVertex;
+			const endPreviousVertex = chainEnd.PreviousVertex;
+
+			this.CorrectBisectorDirection(newVertex.Bisector, beginNextVertex, endPreviousVertex, chainBegin.NextEdge, chainEnd.PreviousEdge);
+
+			if (LavUtil.IsSameLav(beginNextVertex, endPreviousVertex)) {
+				const lavPart = LavUtil.CutLavPart(beginNextVertex, endPreviousVertex);
+
+				const lav = new CircularList<Vertex>();
+				sLav.Add(lav);
+				lav.AddLast(newVertex);
+				for (const vertex of lavPart)
+					lav.AddLast(vertex);
+			} else {
+				LavUtil.MergeBeforeBaseVertex(beginNextVertex, endPreviousVertex);
+				endPreviousVertex.AddNext(newVertex);
+			}
+
+			this.ComputeEvents(newVertex, queue, edges);
+			lastFaceNode = this.AddSplitFaces(lastFaceNode, chainBegin, chainEnd, newVertex);
+		}
+
+		edgeListSize = chains.Count;
+		for (let i = 0; i < edgeListSize; i++) {
+			const chainBegin = chains[i];
+			const chainEnd = chains[(i + 1) % edgeListSize];
+
+			LavUtil.RemoveFromLav(chainBegin.CurrentVertex);
+			LavUtil.RemoveFromLav(chainEnd.CurrentVertex);
+
+			if (chainBegin.CurrentVertex !== null)
+				chainBegin.CurrentVertex.IsProcessed = true;
+			if (chainEnd.CurrentVertex !== null)
+				chainEnd.CurrentVertex.IsProcessed = true;
+		}
+	}
+
+	private static CorrectBisectorDirection(bisector: LineParametric2d, beginNextVertex: Vertex, endPreviousVertex: Vertex, beginEdge: Edge, endEdge: Edge) {
+		const beginEdge2 = beginNextVertex.PreviousEdge;
+		const endEdge2 = endPreviousVertex.NextEdge;
+
+		if (beginEdge !== beginEdge2 || endEdge !== endEdge2)
+			throw new Error();
+
+		if (beginEdge.Norm.Dot(endEdge.Norm) < -0.97) {
+			const n1 = PrimitiveUtils.FromTo(endPreviousVertex.Point, bisector.A).Normalized();
+			const n2 = PrimitiveUtils.FromTo(bisector.A, beginNextVertex.Point).Normalized();
+			const bisectorPrediction = this.CalcVectorBisector(n1, n2);
+
+			if (bisector.U.Dot(bisectorPrediction) < 0)
+				bisector.U.Negate();
+		}
+	}
+
+	private static AddSplitFaces(lastFaceNode: FaceNode, chainBegin: IChain, chainEnd: IChain, newVertex: Vertex): FaceNode {
+		if (chainBegin instanceof SingleEdgeChain) {
+			if (lastFaceNode === null) {
+				const beginVertex = this.CreateOppositeEdgeVertex(newVertex);
+
+				newVertex.RightFace = beginVertex.RightFace;
+				lastFaceNode = beginVertex.LeftFace;
+			} else {
+				if (newVertex.RightFace !== null)
+					throw new Error("newVertex.RightFace should be null");
+
+				newVertex.RightFace = lastFaceNode;
+				lastFaceNode = null;
+			}
+		} else {
+			const beginVertex = chainBegin.CurrentVertex;
+			this.AddFaceRight(newVertex, beginVertex);
+		}
+
+		if (chainEnd instanceof SingleEdgeChain) {
+			if (lastFaceNode === null) {
+				const endVertex = this.CreateOppositeEdgeVertex(newVertex);
+
+				newVertex.LeftFace = endVertex.LeftFace;
+				lastFaceNode = endVertex.LeftFace;
+			} else {
+				if (newVertex.LeftFace !== null)
+					throw new Error("newVertex.LeftFace should be null.");
+				newVertex.LeftFace = lastFaceNode;
+
+				lastFaceNode = null;
+			}
+		} else {
+			const endVertex = chainEnd.CurrentVertex;
+			this.AddFaceLeft(newVertex, endVertex);
+		}
+		return lastFaceNode;
+	}
+
+	private static CreateOppositeEdgeVertex(newVertex: Vertex): Vertex {
+		const vertex = new Vertex(newVertex.Point, newVertex.Distance, newVertex.Bisector, newVertex.PreviousEdge, newVertex.NextEdge);
+
+		const fn = new FaceNode(vertex);
+		vertex.LeftFace = fn;
+		vertex.RightFace = fn;
+
+		const rightFace = new FaceQueue();
+		rightFace.AddFirst(fn);
+
+		return vertex;
+	}
+
+	private static CreateOppositeEdgeChains(sLav: HashSet<CircularList<Vertex>>, chains: List<IChain>, center: Vector2d) {
+		const oppositeEdges = new HashSet<Edge>();
+
+		const oppositeEdgeChains = new List<IChain>();
+		const chainsForRemoval = new List<IChain>();
+
+		for (const chain of chains) {
+			if (chain instanceof SplitChain) {
+				const splitChain = <SplitChain>chain;
+				const oppositeEdge = splitChain.OppositeEdge;
+
+				if (oppositeEdge !== null && !oppositeEdges.Contains(oppositeEdge)) {
+					const nextVertex = this.FindOppositeEdgeLav(sLav, oppositeEdge, center);
+
+					if (nextVertex !== null)
+						oppositeEdgeChains.Add(new SingleEdgeChain(oppositeEdge, nextVertex));
+					else {
+						this.FindOppositeEdgeLav(sLav, oppositeEdge, center);
+						chainsForRemoval.Add(chain);
+					}
+					oppositeEdges.Add(oppositeEdge);
+				}
+			}
+		}
+
+		for (let chain of chainsForRemoval)
+			chains.Remove(chain);
+
+		chains.AddRange(oppositeEdgeChains);
+	}
+
+	private static CreateMultiSplitVertex(nextEdge: Edge, previousEdge: Edge, center: Vector2d, distance: number): Vertex {
+		const bisector = this.CalcBisector(center, previousEdge, nextEdge);
+		return new Vertex(center, distance, bisector, previousEdge, nextEdge);
+	}
+
+	private static CreateChains(cluster: List<SkeletonEvent>): List<IChain> {
+		const edgeCluster = new List<EdgeEvent>();
+		const splitCluster = new List<SplitEvent>();
+		const vertexEventsParents = new HashSet<Vertex>();
+
+		for (const skeletonEvent of cluster) {
+			if (skeletonEvent instanceof EdgeEvent)
+				edgeCluster.Add(<EdgeEvent>skeletonEvent);
+			else {
+				if (skeletonEvent instanceof VertexSplitEvent) {
+
+				} else if (skeletonEvent instanceof SplitEvent) {
+					const splitEvent = <SplitEvent>skeletonEvent;
+					vertexEventsParents.Add(splitEvent.Parent);
+					splitCluster.Add(splitEvent);
+				}
+			}
+		}
+
+		for (let skeletonEvent of cluster) {
+			if (skeletonEvent instanceof VertexSplitEvent) {
+				const vertexEvent = <VertexSplitEvent>skeletonEvent;
+				if (!vertexEventsParents.Contains(vertexEvent.Parent)) {
+					vertexEventsParents.Add(vertexEvent.Parent);
+					splitCluster.Add(vertexEvent);
+				}
+			}
+		}
+
+		const edgeChains = new List<EdgeChain>();
+
+		while (edgeCluster.Count > 0)
+			edgeChains.Add(new EdgeChain(this.CreateEdgeChain(edgeCluster)));
+
+		const chains = new List<IChain>(edgeChains.Count);
+		for (const edgeChain of edgeChains)
+			chains.Add(edgeChain);
+
+		splitEventLoop:
+			while (splitCluster.Any()) {
+				const split = splitCluster[0];
+				splitCluster.RemoveAt(0);
+
+				for (const chain of edgeChains) {
+					if (this.IsInEdgeChain(split, chain))
+						continue splitEventLoop; //goto splitEventLoop;
+				}
+
+				chains.Add(new SplitChain(split));
+			}
+
+		return chains;
+	}
+
+	private static IsInEdgeChain(split: SplitEvent, chain: EdgeChain): boolean {
+		const splitParent = split.Parent;
+		const edgeList = chain.EdgeList;
+
+		return edgeList.Any(edgeEvent => edgeEvent.PreviousVertex === splitParent || edgeEvent.NextVertex === splitParent);
+	}
+
+	private static CreateEdgeChain(edgeCluster: List<EdgeEvent>): List<EdgeEvent> {
+		const edgeList = new List<EdgeEvent>();
+
+		edgeList.Add(edgeCluster[0]);
+		edgeCluster.RemoveAt(0);
+
+		loop:
+			for (; ;) {
+				const beginVertex = edgeList[0].PreviousVertex;
+				const endVertex = edgeList[edgeList.Count - 1].NextVertex;
+
+				for (let i = 0; i < edgeCluster.Count; i++) {
+					const edge = edgeCluster[i];
+					if (edge.PreviousVertex === endVertex) {
+						edgeCluster.RemoveAt(i);
+						edgeList.Add(edge);
+						//goto loop;
+						continue loop;
+
+					}
+					if (edge.NextVertex === beginVertex) {
+						edgeCluster.RemoveAt(i);
+						edgeList.Insert(0, edge);
+						//goto loop;
+						continue loop;
+					}
+				}
+				break;
+			}
+
+		return edgeList;
+	}
+
+	private static RemoveEventsUnderHeight(queue: PriorityQueue<SkeletonEvent>, levelHeight: number) {
+		while (!queue.Empty) {
+			if (queue.Peek().Distance > levelHeight + this.SplitEpsilon)
+				break;
+			queue.Next();
+		}
+	}
+
+	private static LoadAndGroupLevelEvents(queue: PriorityQueue<SkeletonEvent>): List<SkeletonEvent> {
+		const levelEvents = this.LoadLevelEvents(queue);
+		return this.GroupLevelEvents(levelEvents);
+	}
+
+	private static GroupLevelEvents(levelEvents: List<SkeletonEvent>): List<SkeletonEvent> {
+		const ret = new List<SkeletonEvent>();
+
+		const parentGroup = new HashSet<Vertex>();
+
+		while (levelEvents.Count > 0) {
+			parentGroup.Clear();
+
+			const event = levelEvents[0];
+			levelEvents.RemoveAt(0);
+			const eventCenter = event.V;
+			const distance = event.Distance;
+
+			this.AddEventToGroup(parentGroup, event);
+
+			const cluster = new List<SkeletonEvent>();
+			cluster.Add(event);
+
+			for (let j = 0; j < levelEvents.Count; j++) {
+				const test = levelEvents[j];
+
+				if (this.IsEventInGroup(parentGroup, test)) {
+					const item = levelEvents[j];
+					levelEvents.RemoveAt(j);
+					cluster.Add(item);
+					this.AddEventToGroup(parentGroup, test);
+					j--;
+				} else if (eventCenter.DistanceTo(test.V) < this.SplitEpsilon) {
+					const item = levelEvents[j];
+					levelEvents.RemoveAt(j);
+					cluster.Add(item);
+					this.AddEventToGroup(parentGroup, test);
+					j--;
+				}
+			}
+
+			ret.Add(this.CreateLevelEvent(eventCenter, distance, cluster));
+		}
+		return ret;
+	}
+
+	private static IsEventInGroup(parentGroup: HashSet<Vertex>, event: SkeletonEvent): boolean {
+		if (event instanceof SplitEvent)
+			return parentGroup.Contains((<SplitEvent>event).Parent);
+		if (event instanceof EdgeEvent)
+			return parentGroup.Contains((<EdgeEvent>event).PreviousVertex)
+				|| parentGroup.Contains((<EdgeEvent>event).NextVertex);
+		return false;
+	}
+
+	private static AddEventToGroup(parentGroup: HashSet<Vertex>, event: SkeletonEvent) {
+		if (event instanceof SplitEvent)
+			parentGroup.Add((<SplitEvent>event).Parent);
+		else if (event instanceof EdgeEvent) {
+			parentGroup.Add((<EdgeEvent>event).PreviousVertex);
+			parentGroup.Add((<EdgeEvent>event).NextVertex);
+		}
+	}
+
+	private static CreateLevelEvent(eventCenter: Vector2d, distance: number, eventCluster: List<SkeletonEvent>): SkeletonEvent {
+		const chains = this.CreateChains(eventCluster);
+
+		if (chains.Count === 1) {
+			const chain = chains[0];
+			if (chain.ChainType === ChainType.ClosedEdge)
+				return new PickEvent(eventCenter, distance, <EdgeChain>chain);
+			if (chain.ChainType === ChainType.Edge)
+				return new MultiEdgeEvent(eventCenter, distance, <EdgeChain>chain);
+			if (chain.ChainType === ChainType.Split)
+				return new MultiSplitEvent(eventCenter, distance, chains);
+		}
+
+		if (chains.Any(chain => chain.ChainType === ChainType.ClosedEdge))
+			throw new Error("Found closed chain of events for single point, but found more then one chain");
+		return new MultiSplitEvent(eventCenter, distance, chains);
+	}
+
+	private static LoadLevelEvents(queue: PriorityQueue<SkeletonEvent>): List<SkeletonEvent> {
+		const level = new List<SkeletonEvent>();
+		let levelStart: SkeletonEvent;
+
+		do {
+			levelStart = queue.Empty ? null : queue.Next();
+		}
+		while (levelStart !== null && levelStart.IsObsolete);
+
+
+		if (levelStart === null || levelStart.IsObsolete)
+			return level;
+
+		const levelStartHeight = levelStart.Distance;
+
+		level.Add(levelStart);
+
+		let event: SkeletonEvent;
+		while ((event = queue.Peek()) !== null &&
+		Math.abs(event.Distance - levelStartHeight) < this.SplitEpsilon) {
+			const nextLevelEvent = queue.Next();
+			if (!nextLevelEvent.IsObsolete)
+				level.Add(nextLevelEvent);
+		}
+		return level;
+	}
+
+	private static AssertMaxNumberOfInteraction(count: number): number {
+		count++;
+		if (count > 10000)
+			throw new Error("Too many interaction: bug?");
+		return count;
+	}
+
+	private static MakeClockwise(holes: List<List<Vector2d>>): List<List<Vector2d>> {
+		if (holes === null)
+			return null;
+
+		const ret = new List<List<Vector2d>>(holes.Count);
+		for (const hole of holes) {
+			if (PrimitiveUtils.IsClockwisePolygon(hole))
+				ret.Add(hole);
+			else {
+				hole.Reverse();
+				ret.Add(hole);
+			}
+		}
+		return ret;
+	}
+
+	private static MakeCounterClockwise(polygon: List<Vector2d>): List<Vector2d> {
+		return PrimitiveUtils.MakeCounterClockwise(polygon);
+	}
+
+	private static InitSlav(polygon: List<Vector2d>, sLav: HashSet<CircularList<Vertex>>, edges: List<Edge>, faces: List<FaceQueue>) {
+		const edgesList = new CircularList<Edge>();
+
+		const size = polygon.Count;
+		for (let i = 0; i < size; i++) {
+			const j = (i + 1) % size;
+			edgesList.AddLast(new Edge(polygon[i], polygon[j]));
+		}
+
+		for (const edge of edgesList.Iterate()) {
+			const nextEdge = edge.Next as Edge;
+			const bisector = this.CalcBisector(edge.End, edge, nextEdge);
+
+			edge.BisectorNext = bisector;
+			nextEdge.BisectorPrevious = bisector;
+			edges.Add(edge);
+		}
+
+		const lav = new CircularList<Vertex>();
+		sLav.Add(lav);
+
+		for (const edge of edgesList.Iterate()) {
+			const nextEdge = edge.Next as Edge;
+			const vertex = new Vertex(edge.End, 0, edge.BisectorNext, edge, nextEdge);
+			lav.AddLast(vertex);
+		}
+
+		for (const vertex of lav.Iterate()) {
+			const next = vertex.Next as Vertex;
+			const rightFace = new FaceNode(vertex);
+
+			const faceQueue = new FaceQueue();
+			faceQueue.Edge = (vertex.NextEdge);
+
+			faceQueue.AddFirst(rightFace);
+			faces.Add(faceQueue);
+			vertex.RightFace = rightFace;
+
+			const leftFace = new FaceNode(next);
+			rightFace.AddPush(leftFace);
+			next.LeftFace = leftFace;
+		}
+	}
+
+	private static AddFacesToOutput(faces: List<FaceQueue>): Skeleton {
+		const edgeOutputs = new List<EdgeResult>();
+		const distances = new Dictionary<Vector2d, number>();
+
+		for (const face of faces) {
+			if (face.Size > 0) {
+				const faceList = new List<Vector2d>();
+
+				for (const fn of face.Iterate()) {
+					const point = fn.Vertex.Point;
+
+					faceList.Add(point);
+
+					if (!distances.ContainsKey(point))
+						distances.Add(point, fn.Vertex.Distance);
+				}
+
+				edgeOutputs.Add(new EdgeResult(face.Edge, faceList));
+			}
+		}
+		return new Skeleton(edgeOutputs, distances);
+	}
+
+	private static InitEvents(sLav: HashSet<CircularList<Vertex>>, queue: PriorityQueue<SkeletonEvent>, edges: List<Edge>) {
+		for (const lav of sLav) {
+			for (const vertex of lav.Iterate())
+				this.ComputeSplitEvents(vertex, edges, queue, -1);
+		}
+
+		for (const lav of sLav) {
+			for (const vertex of lav.Iterate()) {
+				const nextVertex = vertex.Next as Vertex;
+				this.ComputeEdgeEvents(vertex, nextVertex, queue);
+			}
+		}
+	}
+
+	private static ComputeSplitEvents(vertex: Vertex, edges: List<Edge>, queue: PriorityQueue<SkeletonEvent>, distanceSquared: number) {
+		const source = vertex.Point;
+		const oppositeEdges = this.CalcOppositeEdges(vertex, edges);
+
+		for (const oppositeEdge of oppositeEdges) {
+			const point = oppositeEdge.Point;
+
+			if (Math.abs(distanceSquared - (-1)) > this.SplitEpsilon) {
+				if (source.DistanceSquared(point) > distanceSquared + this.SplitEpsilon) {
+					continue;
+				}
+			}
+
+			if (oppositeEdge.OppositePoint.NotEquals(Vector2d.Empty)) {
+				queue.Add(new VertexSplitEvent(point, oppositeEdge.Distance, vertex));
+				continue;
+			}
+			queue.Add(new SplitEvent(point, oppositeEdge.Distance, vertex, oppositeEdge.OppositeEdge));
+		}
+	}
+
+	private static ComputeEvents(vertex: Vertex, queue: PriorityQueue<SkeletonEvent>, edges: List<Edge>) {
+		const distanceSquared = this.ComputeCloserEdgeEvent(vertex, queue);
+		this.ComputeSplitEvents(vertex, edges, queue, distanceSquared);
+	}
+
+	private static ComputeCloserEdgeEvent(vertex: Vertex, queue: PriorityQueue<SkeletonEvent>): number {
+		const nextVertex = vertex.Next as Vertex;
+		const previousVertex = vertex.Previous as Vertex;
+
+		const point = vertex.Point;
+
+		const point1 = this.ComputeIntersectionBisectors(vertex, nextVertex);
+		const point2 = this.ComputeIntersectionBisectors(previousVertex, vertex);
+
+		if (point1.Equals(Vector2d.Empty) && point2.Equals(Vector2d.Empty))
+			return -1;
+
+		let distance1 = Number.MAX_VALUE;
+		let distance2 = Number.MAX_VALUE;
+
+		if (point1.NotEquals(Vector2d.Empty))
+			distance1 = point.DistanceSquared(point1);
+		if (point2.NotEquals(Vector2d.Empty))
+			distance2 = point.DistanceSquared(point2);
+
+		if (Math.abs(distance1 - this.SplitEpsilon) < distance2)
+			queue.Add(this.CreateEdgeEvent(point1, vertex, nextVertex));
+		if (Math.abs(distance2 - this.SplitEpsilon) < distance1)
+			queue.Add(this.CreateEdgeEvent(point2, previousVertex, vertex));
+
+		return distance1 < distance2 ? distance1 : distance2;
+	}
+
+	private static CreateEdgeEvent(point: Vector2d, previousVertex: Vertex, nextVertex: Vertex): SkeletonEvent {
+		return new EdgeEvent(point, this.CalcDistance(point, previousVertex.NextEdge), previousVertex, nextVertex);
+	}
+
+	private static ComputeEdgeEvents(previousVertex: Vertex, nextVertex: Vertex, queue: PriorityQueue<SkeletonEvent>) {
+		const point = this.ComputeIntersectionBisectors(previousVertex, nextVertex);
+		if (point.NotEquals(Vector2d.Empty))
+			queue.Add(this.CreateEdgeEvent(point, previousVertex, nextVertex));
+	}
+
+	private static CalcOppositeEdges(vertex: Vertex, edges: List<Edge>): List<SplitCandidate> {
+		const ret = new List<SplitCandidate>();
+
+		for (const edgeEntry of edges) {
+			const edge = edgeEntry.LineLinear2d;
+
+			if (this.EdgeBehindBisector(vertex.Bisector, edge))
+				continue;
+
+			const candidatePoint = this.CalcCandidatePointForSplit(vertex, edgeEntry);
+			if (candidatePoint !== null)
+				ret.Add(candidatePoint);
+		}
+
+		ret.Sort(new SplitCandidateComparer());
+		return ret;
+	}
+
+	private static EdgeBehindBisector(bisector: LineParametric2d, edge: LineLinear2d): boolean {
+		return LineParametric2d.Collide(bisector, edge, this.SplitEpsilon).Equals(Vector2d.Empty);
+	}
+
+	private static CalcCandidatePointForSplit(vertex: Vertex, edge: Edge): SplitCandidate {
+		const vertexEdge = this.ChoseLessParallelVertexEdge(vertex, edge);
+		if (vertexEdge === null)
+			return null;
+
+		const vertexEdteNormNegate = vertexEdge.Norm;
+		const edgesBisector = this.CalcVectorBisector(vertexEdteNormNegate, edge.Norm);
+		const edgesCollide = vertexEdge.LineLinear2d.Collide(edge.LineLinear2d);
+
+		if (edgesCollide.Equals(Vector2d.Empty))
+			throw new Error("Ups this should not happen");
+
+		const edgesBisectorLine = new LineParametric2d(edgesCollide, edgesBisector).CreateLinearForm();
+
+		const candidatePoint = LineParametric2d.Collide(vertex.Bisector, edgesBisectorLine, this.SplitEpsilon);
+
+		if (candidatePoint.Equals(Vector2d.Empty))
+			return null;
+
+		if (edge.BisectorPrevious.IsOnRightSite(candidatePoint, this.SplitEpsilon)
+			&& edge.BisectorNext.IsOnLeftSite(candidatePoint, this.SplitEpsilon)) {
+			const distance = this.CalcDistance(candidatePoint, edge);
+
+			if (edge.BisectorPrevious.IsOnLeftSite(candidatePoint, this.SplitEpsilon))
+				return new SplitCandidate(candidatePoint, distance, null, edge.Begin);
+			if (edge.BisectorNext.IsOnRightSite(candidatePoint, this.SplitEpsilon))
+				return new SplitCandidate(candidatePoint, distance, null, edge.Begin);
+
+			return new SplitCandidate(candidatePoint, distance, edge, Vector2d.Empty);
+		}
+
+		return null;
+	}
+
+	private static ChoseLessParallelVertexEdge(vertex: Vertex, edge: Edge): Edge {
+		const edgeA = vertex.PreviousEdge;
+		const edgeB = vertex.NextEdge;
+
+		let vertexEdge = edgeA;
+
+		const edgeADot = Math.abs(edge.Norm.Dot(edgeA.Norm));
+		const edgeBDot = Math.abs(edge.Norm.Dot(edgeB.Norm));
+
+		if (edgeADot + edgeBDot >= 2 - this.SplitEpsilon)
+			return null;
+
+		if (edgeADot > edgeBDot)
+			vertexEdge = edgeB;
+
+		return vertexEdge;
+	}
+
+	private static ComputeIntersectionBisectors(vertexPrevious: Vertex, vertexNext: Vertex): Vector2d {
+		const bisectorPrevious = vertexPrevious.Bisector;
+		const bisectorNext = vertexNext.Bisector;
+
+		const intersectRays2d = PrimitiveUtils.IntersectRays2D(bisectorPrevious, bisectorNext);
+		const intersect = intersectRays2d.Intersect;
+
+		if (vertexPrevious.Point.Equals(intersect) || vertexNext.Point.Equals(intersect))
+			return Vector2d.Empty;
+
+		return intersect;
+	}
+
+	private static FindOppositeEdgeLav(sLav: HashSet<CircularList<Vertex>>, oppositeEdge: Edge, center: Vector2d): Vertex {
+		const edgeLavs = this.FindEdgeLavs(sLav, oppositeEdge, null);
+		return this.ChooseOppositeEdgeLav(edgeLavs, oppositeEdge, center);
+	}
+
+	private static ChooseOppositeEdgeLav(edgeLavs: List<Vertex>, oppositeEdge: Edge, center: Vector2d): Vertex {
+		if (!edgeLavs.Any())
+			return null;
+
+		if (edgeLavs.Count === 1)
+			return edgeLavs[0];
+
+		const edgeStart = oppositeEdge.Begin;
+		const edgeNorm = oppositeEdge.Norm;
+		const centerVector = center.Sub(edgeStart);
+		const centerDot = edgeNorm.Dot(centerVector);
+		for (const end of edgeLavs) {
+			const begin = end.Previous as Vertex;
+
+			const beginVector = begin.Point.Sub(edgeStart);
+			const endVector = end.Point.Sub(edgeStart);
+
+			const beginDot = edgeNorm.Dot(beginVector);
+			const endDot = edgeNorm.Dot(endVector);
+
+			if (beginDot < centerDot && centerDot < endDot ||
+				beginDot > centerDot && centerDot > endDot)
+				return end;
+		}
+
+		for (const end of edgeLavs) {
+			const size = end.List.Size;
+			const points = new List<Vector2d>(size);
+			let next = end;
+			for (let i = 0; i < size; i++) {
+				points.Add(next.Point);
+				next = next.Next as Vertex;
+			}
+			if (PrimitiveUtils.IsPointInsidePolygon(center, points))
+				return end;
+		}
+		throw new Error("Could not find lav for opposite edge, it could be correct but need some test data to check.");
+	}
+
+	private static FindEdgeLavs(sLav: HashSet<CircularList<Vertex>>, oppositeEdge: Edge, skippedLav: CircularList<Vertex>): List<Vertex> {
+		const edgeLavs = new List<Vertex>();
+		for (const lav of sLav) {
+			if (lav === skippedLav)
+				continue;
+
+			const vertexInLav = this.GetEdgeInLav(lav, oppositeEdge);
+			if (vertexInLav !== null)
+				edgeLavs.Add(vertexInLav);
+		}
+		return edgeLavs;
+	}
+
+	private static GetEdgeInLav(lav: CircularList<Vertex>, oppositeEdge: Edge): Vertex {
+		for (const node of lav.Iterate())
+			if (oppositeEdge === node.PreviousEdge ||
+				oppositeEdge === node.Previous.Next)
+				return node;
+
+		return null;
+	}
+
+	private static AddFaceBack(newVertex: Vertex, va: Vertex, vb: Vertex) {
+		const fn = new FaceNode(newVertex);
+		va.RightFace.AddPush(fn);
+		FaceQueueUtil.ConnectQueues(fn, vb.LeftFace);
+	}
+
+	private static AddFaceRight(newVertex: Vertex, vb: Vertex) {
+		const fn = new FaceNode(newVertex);
+		vb.RightFace.AddPush(fn);
+		newVertex.RightFace = fn;
+	}
+
+	private static AddFaceLeft(newVertex: Vertex, va: Vertex) {
+		const fn = new FaceNode(newVertex);
+		va.LeftFace.AddPush(fn);
+		newVertex.LeftFace = fn;
+	}
+
+	private static CalcDistance(intersect: Vector2d, currentEdge: Edge): number {
+		const edge = currentEdge.End.Sub(currentEdge.Begin);
+		const vector = intersect.Sub(currentEdge.Begin);
+
+		const pointOnVector = PrimitiveUtils.OrthogonalProjection(edge, vector);
+		return vector.DistanceTo(pointOnVector);
+	}
+
+	private static CalcBisector(p: Vector2d, e1: Edge, e2: Edge): LineParametric2d {
+		const norm1 = e1.Norm;
+		const norm2 = e2.Norm;
+
+		const bisector = this.CalcVectorBisector(norm1, norm2);
+		return new LineParametric2d(p, bisector);
+	}
+
+	private static CalcVectorBisector(norm1: Vector2d, norm2: Vector2d): Vector2d {
+		return PrimitiveUtils.BisectorNormalized(norm1, norm2);
+	}
+}
+
+class SkeletonEventDistanseComparer implements IComparer<SkeletonEvent> {
+	public Compare(left: SkeletonEvent, right: SkeletonEvent): number {
+		if (left.Distance > right.Distance)
+			return 1;
+		if (left.Distance < right.Distance)
+			return -1;
+
+		return 0;
+	}
+}
+
+class ChainComparer implements IComparer<IChain> {
+	private readonly _center: Vector2d;
+
+	constructor(center: Vector2d) {
+		this._center = center;
+	}
+
+	public Compare(x: IChain, y: IChain): number {
+		if (x === y)
+			return 0;
+
+		const angle1 = ChainComparer.Angle(this._center, x.PreviousEdge.Begin);
+		const angle2 = ChainComparer.Angle(this._center, y.PreviousEdge.Begin);
+
+		return angle1 > angle2 ? 1 : -1;
+	}
+
+	private static Angle(p0: Vector2d, p1: Vector2d): number {
+		const dx = p1.X - p0.X;
+		const dy = p1.Y - p0.Y;
+		return Math.atan2(dy, dx);
+	}
+}
+
+class SplitCandidateComparer implements IComparer<SplitCandidate> {
+	public Compare(left: SplitCandidate, right: SplitCandidate): number {
+		if (left.Distance > right.Distance)
+			return 1;
+		if (left.Distance < right.Distance)
+			return -1;
+
+		return 0;
+	}
+}
+
+class SplitCandidate {
+	public readonly Distance: number;
+	public readonly OppositeEdge: Edge = null;
+	public readonly OppositePoint: Vector2d = null;
+	public readonly Point: Vector2d = null;
+
+	constructor(point: Vector2d, distance: number, oppositeEdge: Edge, oppositePoint: Vector2d) {
+		this.Point = point;
+		this.Distance = distance;
+		this.OppositeEdge = oppositeEdge;
+		this.OppositePoint = oppositePoint;
+	}
+}
+
diff --git a/src/lib/skeletons/Utils.ts b/src/lib/skeletons/Utils.ts
new file mode 100644
index 00000000..cfd3ff8b
--- /dev/null
+++ b/src/lib/skeletons/Utils.ts
@@ -0,0 +1,133 @@
+function insertInArray<T>(array: Array<T>, index: number, item: T): Array<T> {
+	const items = Array.prototype.slice.call(arguments, 2);
+
+	return [].concat(array.slice(0, index), items, array.slice(index));
+}
+
+export interface IComparable<T> {
+	CompareTo(other: T): number;
+}
+
+export interface IComparer<T> {
+	Compare(a: T, b: T): number;
+}
+
+export type GeoJSONMultipolygon = [number, number][][][];
+
+export class List<T> extends Array<T> {
+	constructor(capacity = 0) {
+		super();
+	}
+
+	public Add(item: T) {
+		this.push(item);
+	}
+
+	public Insert(index: number, item: T) {
+		const newArr = insertInArray(this, index, item);
+
+		this.length = newArr.length;
+
+		for(let i = 0; i < newArr.length; i++) {
+			this[i] = newArr[i];
+		}
+	}
+
+	public Reverse() {
+		this.reverse();
+	}
+
+	public Clear() {
+		this.length = 0;
+	}
+
+	get Count(): number {
+		return this.length;
+	}
+
+	public Any(filter?: (item: T) => boolean): boolean {
+		if (!filter) {
+			filter = T => true;
+		}
+
+		for (const item of this) {
+			if (filter(item)) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	public RemoveAt(index: number) {
+		this.splice(index, 1);
+	}
+
+	public Remove(itemToRemove: T) {
+		const newArr = this.filter(item => item !== itemToRemove);
+
+		this.length = newArr.length;
+
+		for(let i = 0; i < newArr.length; i++) {
+			this[i] = newArr[i];
+		}
+	}
+
+	public AddRange(list: List<T>) {
+		for (const item of list) {
+			this.Add(item);
+		}
+	}
+
+	public Sort(comparer: IComparer<T>) {
+		this.sort(comparer.Compare.bind(comparer));
+	}
+}
+
+export class HashSet<T> implements Iterable<T> {
+	private Set: Set<T>;
+
+	constructor() {
+		this.Set = new Set();
+	}
+
+	public Add(item: T) {
+		this.Set.add(item);
+	}
+
+	public Remove(item: T) {
+		this.Set.delete(item);
+	}
+
+	public RemoveWhere(filter: (item: T) => boolean) {
+		for (const item of this.Set.values()) {
+			if (filter(item)) {
+				this.Set.delete(item);
+			}
+		}
+	}
+
+	public Contains(item: T): boolean {
+		return this.Set.has(item);
+	}
+
+	public Clear() {
+		this.Set.clear();
+	}
+
+	public* [Symbol.iterator](): Generator<T> {
+		for (const item of this.Set.values()) {
+			yield item;
+		}
+	}
+}
+
+export class Dictionary<T1, T2> extends Map<T1, T2> {
+	public ContainsKey(key: T1): boolean {
+		return this.has(key);
+	}
+
+	public Add(key: T1, value: T2) {
+		return this.set(key, value);
+	}
+}
\ No newline at end of file
diff --git a/src/lib/skeletons/index.ts b/src/lib/skeletons/index.ts
new file mode 100644
index 00000000..b1f2cdb5
--- /dev/null
+++ b/src/lib/skeletons/index.ts
@@ -0,0 +1,12 @@
+// Types
+export type { GeoJSONMultipolygon, List } from "./Utils";
+export type { Skeleton } from "./Skeleton";
+
+// Values
+export { default as Vector2d } from "./Primitives/Vector2d";
+export { default as SkeletonBuilder } from "./SkeletonBuilder";
+export { default as EdgeResult } from "./EdgeResult";
+export { default as Edge } from "./Circular/Edge";
+export { default as Vertex } from "./Circular/Vertex";
+
+
diff --git a/src/locales/ja.json b/src/locales/ja.json
index 44f723fd..5aa83d3f 100644
--- a/src/locales/ja.json
+++ b/src/locales/ja.json
@@ -57,6 +57,7 @@
   "modal.movement.flow.line.top.right": "高さ変更：上、右",
   "plan.menu.roof.cover.outline.edit.offset": "外壁の編集とオフセット",
   "plan.menu.roof.cover.roof.surface.alloc": "屋根面の割り当て",
+  "plan.menu.roof.cover.roof.surface.all.remove": "伏せ図全削除",
   "plan.menu.roof.cover.roof.shape.edit": "屋根形状編集",
   "plan.menu.roof.cover.auxiliary.line.drawing": "補助線の作成",
   "modal.cover.outline.drawing": "外壁線の作成",
diff --git a/src/locales/ko.json b/src/locales/ko.json
index 83ed3f2e..35caabfd 100644
--- a/src/locales/ko.json
+++ b/src/locales/ko.json
@@ -57,6 +57,7 @@
   "modal.movement.flow.line.top.right": "높이변경 : 위, 오른쪽",
   "plan.menu.roof.cover.outline.edit.offset": "외벽선 편집 및 오프셋",
   "plan.menu.roof.cover.roof.surface.alloc": "지붕면 할당",
+  "plan.menu.roof.cover.roof.surface.all.remove": "배치면 전체 삭제",
   "plan.menu.roof.cover.roof.shape.edit": "지붕형상 편집",
   "plan.menu.roof.cover.auxiliary.line.drawing": "보조선 작성",
   "modal.cover.outline.drawing": "외벽선 작성",
diff --git a/src/store/menuAtom.js b/src/store/menuAtom.js
index fdb50461..007e7950 100644
--- a/src/store/menuAtom.js
+++ b/src/store/menuAtom.js
@@ -23,9 +23,19 @@ export const menusState = atom({
     },
     { type: 'outline', name: 'plan.menu.roof.cover', icon: 'con02', title: MENU.ROOF_COVERING.DEFAULT },
     { type: 'surface', name: 'plan.menu.placement.surface', icon: 'con03', title: MENU.BATCH_CANVAS.DEFAULT },
-    { type: 'module', name: 'plan.menu.module.circuit.setting', icon: 'con04', title: MENU.MODULE_CIRCUIT_SETTING.DEFAULT },
+    {
+      type: 'module',
+      name: 'plan.menu.module.circuit.setting',
+      icon: 'con04',
+      title: MENU.MODULE_CIRCUIT_SETTING.DEFAULT,
+    },
     { type: 'estimate', name: 'plan.menu.estimate', icon: 'con06', title: MENU.ESTIMATE.DEFAULT },
-    { type: 'simulation', name: 'plan.menu.simulation', icon: 'con05', title: MENU.POWER_GENERATION_SIMULATION.DEFAULT },
+    {
+      type: 'simulation',
+      name: 'plan.menu.simulation',
+      icon: 'con05',
+      title: MENU.POWER_GENERATION_SIMULATION.DEFAULT,
+    },
   ],
 })
 
@@ -37,16 +47,17 @@ export const subMenusState = atom({
       // 지붕덮개
       { id: 0, name: 'plan.menu.roof.cover.outline.drawing', menu: MENU.ROOF_COVERING.EXTERIOR_WALL_LINE },
       { id: 1, name: 'plan.menu.roof.cover.roof.shape.setting', menu: MENU.ROOF_COVERING.ROOF_SHAPE_SETTINGS },
-      // {
-      //   id: 2,
-      //   name: 'plan.menu.roof.cover.roof.shape.passivity.setting',
-      //   menu: MENU.ROOF_COVERING.ROOF_SHAPE_PASSIVITY_SETTINGS,
-      // },
+      {
+        id: 2,
+        name: 'plan.menu.roof.cover.roof.shape.passivity.setting',
+        menu: MENU.ROOF_COVERING.ROOF_SHAPE_PASSIVITY_SETTINGS,
+      },
       { id: 3, name: 'plan.menu.roof.cover.auxiliary.line.drawing', menu: MENU.ROOF_COVERING.HELP_LINE_DRAWING },
       { id: 4, name: 'plan.menu.roof.cover.eaves.kerava.edit', menu: MENU.ROOF_COVERING.EAVES_KERAVA_EDIT },
       { id: 5, name: 'plan.menu.roof.cover.movement.shape.updown', menu: MENU.ROOF_COVERING.MOVEMENT_SHAPE_UPDOWN },
       { id: 6, name: 'plan.menu.roof.cover.outline.edit.offset', menu: MENU.ROOF_COVERING.OUTLINE_EDIT_OFFSET },
       { id: 7, name: 'plan.menu.roof.cover.roof.surface.alloc', menu: MENU.ROOF_COVERING.ROOF_SHAPE_ALLOC },
+      { id: 8, name: 'plan.menu.roof.cover.roof.surface.all.remove', menu: MENU.ROOF_COVERING.ALL_REMOVE },
     ],
     surface: [
       // 배치면
diff --git a/src/styles/calc.scss b/src/styles/calc.scss
index f30bc691..f3977c65 100644
--- a/src/styles/calc.scss
+++ b/src/styles/calc.scss
@@ -112,23 +112,24 @@ $colors: (
       }
 
       .btn-delete {
-        background-color: map-get($colors, 'dark-500');
-
-        &:hover {
-          background-color: map-get($colors, 'dark-300');
-        }
-      }
-
-      .btn-equals {
         background-color: map-get($colors, 'primary');
+        grid-column: span 2;
 
         &:hover {
           background-color: map-get($colors, 'primary-dark');
         }
       }
 
+      .btn-equals {
+        background-color: map-get($colors, 'warning');
+
+        &:hover {
+          background-color: map-get($colors, 'warning-dark');
+        }
+      }
+
       .btn-zero {
-        grid-column: span 2;
+        grid-column: span 1;
       }
     }
   }
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 00000000..2a8f023b
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,39 @@
+{
+  "compilerOptions": {
+    "target": "es2015",
+    "downlevelIteration": true,
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "strict": false,
+    "noEmit": true,
+    "incremental": true,
+    "module": "esnext",
+    "esModuleInterop": true,
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "jsx": "preserve",
+    "plugins": [
+      {
+        "name": "next"
+      }
+    ],
+    "paths": {
+        "@/*": ["./src/*"]
+      }
+  },
+  "include": [
+    "next-env.d.ts",
+    ".next/types/**/*.ts",
+    "**/*.ts",
+    "**/*.tsx"
+  ],
+  "exclude": [
+    "node_modules"
+  ]
+}