diff --git a/src/hooks/roofcover/useRoofAllocationSetting.js b/src/hooks/roofcover/useRoofAllocationSetting.js
index e6d7a825..ae26d4d7 100644
--- a/src/hooks/roofcover/useRoofAllocationSetting.js
+++ b/src/hooks/roofcover/useRoofAllocationSetting.js
@@ -29,6 +29,8 @@ import { QcastContext } from '@/app/QcastProvider'
 import { usePlan } from '@/hooks/usePlan'
 import { roofsState } from '@/store/roofAtom'
 import { useText } from '@/hooks/useText'
+import { processEaveHelpLines } from '@/util/skeleton-utils'
+import { QLine } from '@/components/fabric/QLine'
 
 export function useRoofAllocationSetting(id) {
   const canvas = useRecoilValue(canvasState)
@@ -404,6 +406,56 @@ export function useRoofAllocationSetting(id) {
     const wallLines = canvas.getObjects().filter((obj) => obj.name === POLYGON_TYPE.WALL)
     roofBases.forEach((roofBase) => {
       try {
+
+        const roofEaveHelpLines = canvas.getObjects().filter(obj =>
+          obj.name === 'eaveHelpLine' && obj.roofId === roofBase.id
+        );
+
+        const mergedEaveLines = processEaveHelpLines(roofEaveHelpLines);
+        // 기존 라인 제거
+        roofEaveHelpLines.forEach(line => canvas.remove(line));
+
+        mergedEaveLines.forEach(line => {
+          const newLine = new QLine([line.x1, line.y1, line.x2, line.y2], {
+            // 필요한 속성들 유지
+            parentId   : roofBase.id,
+            fontSize   : 10,
+            stroke     : 'blue',
+            strokeWidth: 4,
+            name       : 'eaveHelpLine',
+            lineName   : 'eaveHelpLine',
+            selectable : true,
+            visible    : true,
+            roofId     : roofBase.id,
+            attributes : {
+              type: 'eaveHelpLine'
+            }
+            // 기타 속성들...
+          });
+          canvas.add(newLine);
+        });
+
+        canvas.renderAll();
+
+
+        if (roofBase.lines) {
+          // Filter out any eaveHelpLines that are already in lines to avoid duplicates
+          const existingEaveLineIds = new Set(roofBase.lines.map(line => line.id));
+          const newEaveLines = mergedEaveLines.filter(line => !existingEaveLineIds.has(line.id));
+          roofBase.lines = [...roofBase.lines, ...newEaveLines];
+        } else {
+          roofBase.lines = [...roofEaveHelpLines];
+        }
+
+
+        if (!roofBase.innerLines) {
+          roofBase.innerLines = [];
+        }
+
+        // Add only eaveHelpLines that belong to this roofBase
+        // const baseEaveHelpLines = roofEaveHelpLines.filter(line => line.roofId === roofBase.id);
+        // roofBase.innerLines = [...new Set([...roofBase.innerLines, ...baseEaveHelpLines])];
+
         if (roofBase.separatePolygon.length > 0) {
           splitPolygonWithSeparate(roofBase.separatePolygon)
         } else {
diff --git a/src/util/skeleton-utils.js b/src/util/skeleton-utils.js
index c422e079..56984fbf 100644
--- a/src/util/skeleton-utils.js
+++ b/src/util/skeleton-utils.js
@@ -437,6 +437,55 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
 
   const processedInnerEdges = new Set()
 
+  const textElements = {};
+
+  const coordinateText = (line) => {
+    // Generate a stable ID for this line
+    const lineKey = `${line.x1},${line.y1},${line.x2},${line.y2}`;
+
+    // Remove existing text elements for this line
+    if (textElements[lineKey]) {
+      textElements[lineKey].forEach(text => {
+        if (canvas.getObjects().includes(text)) {
+          canvas.remove(text);
+        }
+      });
+    }
+
+    // Create start point text
+    const startText = new fabric.Text(`(${Math.round(line.x1)}, ${Math.round(line.y1)})`, {
+      left: line.x1 + 5,
+      top: line.y1 - 20,
+      fontSize: 10,
+      fill: 'green',
+      fontFamily: 'Arial',
+      selectable: false,
+      hasControls: false,
+      hasBorders: false
+    });
+
+    // Create end point text
+    const endText = new fabric.Text(`(${Math.round(line.x2)}, ${Math.round(line.y2)})`, {
+      left: line.x2 + 5,
+      top: line.y2 - 20,
+      fontSize: 10,
+      fill: 'orange',
+      fontFamily: 'Arial',
+      selectable: false,
+      hasControls: false,
+      hasBorders: false
+    });
+
+    // Add to canvas
+    canvas.add(startText, endText);
+
+    // Store references
+    textElements[lineKey] = [startText, endText];
+
+    // Bring lines to front
+    canvas.bringToFront(startText);
+    canvas.bringToFront(endText);
+  };
   // 1. 모든 Edge를 순회하며 기본 스켈레톤 선(용마루)을 수집합니다.
 
   skeleton.Edges.forEach((edgeResult, index) => {
@@ -556,10 +605,9 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
       lineName: (sktLine.attributes.isOuterEdge)?'roofLine': attributes.type,
       selectable:(!sktLine.attributes.isOuterEdge),
       visible: (!sktLine.attributes.isOuterEdge),
-      lineNo: (sktLine.attributes.isOuterEdge)? skIndex:0,//그려지는 외곽라인의 순서를 찾아서...
     });
 
-
+    coordinateText(skeletonLine)
       canvas.add(skeletonLine);
     skeletonLine.bringToFront();
       existingLines.add(lineKey); // 추가된 라인을 추적
@@ -588,22 +636,22 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
    canvas.renderAll();
   });
 
+if(roof.moveUpDown??0 > 0) {
 
   // 같은 라인이 없으므로 새 다각형 라인 생성
-    //라인 편집
-   //  let i = 0
-   const currentRoofLines = canvas.getObjects().filter((obj) => obj.lineName === 'roofLine' && obj.attributes.roofId === roofId)
-   let roofLineRects = canvas.getObjects().filter((obj) => obj.name === 'roofLineRect' && obj.roofId === roofId)
+  //라인 편집
+  //  let i = 0
+  const currentRoofLines = canvas.getObjects().filter((obj) => obj.lineName === 'roofLine' && obj.attributes.roofId === roofId)
+  let roofLineRects = canvas.getObjects().filter((obj) => obj.name === 'roofLineRect' && obj.roofId === roofId)
+
 
-   
-   
   roofLineRects.forEach((roofLineRect) => {
-     canvas.remove(roofLineRect)
-     canvas.renderAll()
-   })
-   
-   let helpLines = canvas.getObjects().filter((obj) => obj.lineName === 'helpLine' && obj.roofId === roofId)
-   helpLines.forEach((helpLine) => {
+    canvas.remove(roofLineRect)
+    canvas.renderAll()
+  })
+
+  let helpLines = canvas.getObjects().filter((obj) => obj.lineName === 'helpLine' && obj.roofId === roofId)
+  helpLines.forEach((helpLine) => {
     canvas.remove(helpLine)
     canvas.renderAll()
   })
@@ -637,29 +685,81 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
   }
 
 
-
   // function sortCurrentRoofLines(lines) {
   //   return [...lines].sort((a, b) => {
   //     const aX = a.x1 ?? a.get('x1')
   //     const aY = a.y1 ?? a.get('y1')
   //     const bX = b.x1 ?? b.get('x1')
   //     const bY = b.y1 ?? b.get('y1')
-      
+
   //     if (aX !== bX) return aX - bX
   //     return aY - bY
   //   })
   // }
-  
+
 
   // 각 라인 집합 정렬
+
+  // roofLines의 방향에 맞춰 currentRoofLines의 방향을 조정
+  const alignLineDirection = (sourceLines, targetLines) => {
+    return sourceLines.map(sourceLine => {
+      // 가장 가까운 targetLine 찾기
+      const nearestTarget = targetLines.reduce((nearest, targetLine) => {
+        const sourceCenter = {
+          x: (sourceLine.x1 + sourceLine.x2) / 2,
+          y: (sourceLine.y1 + sourceLine.y2) / 2
+        };
+        const targetCenter = {
+          x: (targetLine.x1 + targetLine.x2) / 2,
+          y: (targetLine.y1 + targetLine.y2) / 2
+        };
+        const distance = Math.hypot(
+          sourceCenter.x - targetCenter.x,
+          sourceCenter.y - targetCenter.y
+        );
+
+        return !nearest || distance < nearest.distance
+          ? { line: targetLine, distance }
+          : nearest;
+      }, null)?.line;
+
+      if (!nearestTarget) return sourceLine;
+
+      // 방향이 반대인지 확인 (벡터 내적을 사용)
+      const sourceVec = {
+        x: sourceLine.x2 - sourceLine.x1,
+        y: sourceLine.y2 - sourceLine.y1
+      };
+      const targetVec = {
+        x: nearestTarget.x2 - nearestTarget.x1,
+        y: nearestTarget.y2 - nearestTarget.y1
+      };
+
+      const dotProduct = sourceVec.x * targetVec.x + sourceVec.y * targetVec.y;
+
+      // 내적이 음수이면 방향이 반대이므로 뒤집기
+      if (dotProduct < 0) {
+        return {
+          ...sourceLine,
+          x1: sourceLine.x2,
+          y1: sourceLine.y2,
+          x2: sourceLine.x1,
+          y2: sourceLine.y1
+        };
+      }
+
+      return sourceLine;
+    });
+  };
+
   const sortedWallLines = sortCurrentRoofLines(wall.lines);
-  const sortedCurrentRoofLines = sortCurrentRoofLines(currentRoofLines);
+  // roofLines의 방향에 맞춰 currentRoofLines 조정 후 정렬
+  const alignedCurrentRoofLines = alignLineDirection(currentRoofLines, roofLines);
+  const sortedCurrentRoofLines = sortCurrentRoofLines(alignedCurrentRoofLines);
   const sortedRoofLines = sortCurrentRoofLines(roofLines);
   const sortedWallBaseLines = sortCurrentRoofLines(wall.baseLines);
 
 
-
-
   //wall.lines 는 기본 벽 라인
   //wall.baseLine은 움직인라인
   const movedLines = []
@@ -672,6 +772,23 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
     const moveLine = sortedWallBaseLines[index]
     const wallBaseLine = sortedWallBaseLines[index]
 
+    console.log('=== Line Coordinates ===');
+    console.table({
+      'Point'          : ['X', 'Y'],
+      'roofLine'       : [roofLine.x1, roofLine.y1],
+      'currentRoofLine': [currentRoofLine.x1, currentRoofLine.y1],
+      'moveLine'       : [moveLine.x1, moveLine.y1],
+      'wallBaseLine'   : [wallBaseLine.x1, wallBaseLine.y1]
+    });
+    console.log('End Points:');
+    console.table({
+      'Point'          : ['X', 'Y'],
+      'roofLine'       : [roofLine.x2, roofLine.y2],
+      'currentRoofLine': [currentRoofLine.x2, currentRoofLine.y2],
+      'moveLine'       : [moveLine.x2, moveLine.y2],
+      'wallBaseLine'   : [wallBaseLine.x2, wallBaseLine.y2]
+    });
+
     const origin = moveLine.attributes?.originPoint
     if (!origin) return
 
@@ -698,184 +815,160 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
         fontSize   : roof.fontSize,
         stroke     : stroke,
         strokeWidth: 4,
-        name       : 'helpLine',
-        lineName   : 'helpLine',
+        name       : 'eaveHelpLine',
+        lineName   : 'eaveHelpLine',
         selectable : true,
         visible    : true,
         roofId     : roofId,
         attributes : {
-          type: 'helpLine'
+          type: 'eaveHelpLine'
         }
       });
-
-      const coordinateText = new fabric.Text(`(${Math.round(line.x1)}, ${Math.round(line.y1)})`, {
-        left: line.x1 + 5, // 좌표점에서 약간 오른쪽으로 이동
-        top: line.y1 - 20, // 좌표점에서 약간 위로 이동
-        fontSize: 13,
-        fill: 'red',
-        fontFamily: 'Arial',
-        selectable: true,
-        lockMovementX: false,
-        lockMovementY: false,
-        lockRotation: true,
-        lockScalingX: true,
-        lockScalingY: true,
-        name: 'lengthText'
-      })
-
-      canvas?.add(coordinateText)
-
+      coordinateText(line)
       canvas.add(line)
       canvas.renderAll();
       return line
     }
 
 //두 포인트가 변경된 라인인
-  if (fullyMoved) {
-    //반시계방향향
-    newPStart = {x:roofLine.x1, y:roofLine.y1}
-    newPEnd = {x:roofLine.x2, y:roofLine.y2}
+    if (fullyMoved) {
+      //반시계방향향
+      newPStart = { x: roofLine.x1, y: roofLine.y1 }
+      newPEnd = { x: roofLine.x2, y: roofLine.y2 }
 
-    console.log("moveFully:::::::::::::", wallBaseLine, newPStart, newPEnd)
+      console.log("moveFully:::::::::::::", wallBaseLine, newPStart, newPEnd)
 
-    if(getOrientation(roofLine) === 'vertical'){
+      if (getOrientation(roofLine) === 'vertical') {
 
-      if(newPEnd.y <= wallBaseLine.y2 && wallBaseLine.y2 <= newPStart.y && newPStart.y <= wallBaseLine.y1){
-        newPStart.y = wallBaseLine.y1;
-        getAddLine({x:newPEnd.x, y:wallBaseLine.y1}, {x: wallBaseLine.x1, y:wallBaseLine.y1 })
-      } else if(wallBaseLine.y2 <= newPEnd.y && newPEnd.y <= wallBaseLine.y1 && wallBaseLine.y1 <= newPStart.y){
-          newPEnd.y = wallBaseLine.y2;
-        getAddLine({x:newPEnd.x, y:wallBaseLine.y2}, {x: wallBaseLine.x2, y:wallBaseLine.y2 })
-      } else if(newPStart.y <= wallBaseLine.y1 && wallBaseLine.y1 <= newPEnd.y && newPEnd.y <= wallBaseLine.y2){
-          newPEnd.y = wallBaseLine.y2;
-        getAddLine({x:newPEnd.x, y:wallBaseLine.y2}, {x: wallBaseLine.x2, y:wallBaseLine.y2 })
-      } else if(wallBaseLine.y1 <= newPStart.y && newPStart.y <= wallBaseLine.y2 && wallBaseLine.y2 <= newPEnd.y){
+        if (newPEnd.y <= wallBaseLine.y2 && wallBaseLine.y2 <= newPStart.y && newPStart.y <= wallBaseLine.y1) {
           newPStart.y = wallBaseLine.y1;
-        getAddLine({x:newPEnd.x, y:wallBaseLine.y1}, {x: wallBaseLine.x1, y:wallBaseLine.y1 })
-      } else if(wallBaseLine.y2 <= newPEnd.y && newPStart.y <= wallBaseLine.y1 ) { // 위가운데
-        newPEnd.y = wallBaseLine.y2;
-        getAddLine({x:newPEnd.x, y:wallBaseLine.y2}, {x: wallBaseLine.x2, y:wallBaseLine.y2 })
-        newPStart.y = wallBaseLine.y1;
-        getAddLine({x:newPEnd.x, y:wallBaseLine.y1}, {x: wallBaseLine.x1, y:wallBaseLine.y1 })
-      } else if(wallBaseLine.y1 <= newPStart.y && newPEnd.y <= wallBaseLine.y2 ) { // 아래가운데
-        newPEnd.y = wallBaseLine.y1;
-        getAddLine({x:newPEnd.x, y:wallBaseLine.y1}, {x: wallBaseLine.x1, y:wallBaseLine.y1 })
-        newPStart.y = wallBaseLine.y2;
-        getAddLine({x:newPStart.x, y:wallBaseLine.y2}, {x: wallBaseLine.x2, y:wallBaseLine.y2 })
-      }
-    
-
-    }else if(getOrientation(roofLine) === 'horizontal') {
+          getAddLine({ x: newPEnd.x, y: wallBaseLine.y1 }, { x: wallBaseLine.x1, y: wallBaseLine.y1 })
+        } else if (wallBaseLine.y2 <= newPEnd.y && newPEnd.y <= wallBaseLine.y1 && wallBaseLine.y1 <= newPStart.y) {
+          newPEnd.y = wallBaseLine.y2;
+          getAddLine({ x: newPEnd.x, y: wallBaseLine.y2 }, { x: wallBaseLine.x2, y: wallBaseLine.y2 })
+        } else if (newPStart.y <= wallBaseLine.y1 && wallBaseLine.y1 <= newPEnd.y && newPEnd.y <= wallBaseLine.y2) {
+          newPEnd.y = wallBaseLine.y2;
+          getAddLine({ x: newPEnd.x, y: wallBaseLine.y2 }, { x: wallBaseLine.x2, y: wallBaseLine.y2 })
+        } else if (wallBaseLine.y1 <= newPStart.y && newPStart.y <= wallBaseLine.y2 && wallBaseLine.y2 <= newPEnd.y) {
+          newPStart.y = wallBaseLine.y1;
+          getAddLine({ x: newPEnd.x, y: wallBaseLine.y1 }, { x: wallBaseLine.x1, y: wallBaseLine.y1 })
+        } else if (wallBaseLine.y2 <= newPEnd.y && newPStart.y <= wallBaseLine.y1) { // 위가운데
+          newPEnd.y = wallBaseLine.y2;
+          getAddLine({ x: newPEnd.x, y: wallBaseLine.y2 }, { x: wallBaseLine.x2, y: wallBaseLine.y2 })
+          newPStart.y = wallBaseLine.y1;
+          getAddLine({ x: newPEnd.x, y: wallBaseLine.y1 }, { x: wallBaseLine.x1, y: wallBaseLine.y1 })
+        } else if (wallBaseLine.y1 <= newPStart.y && newPEnd.y <= wallBaseLine.y2) { // 아래가운데
+          newPEnd.y = wallBaseLine.y1;
+          getAddLine({ x: newPEnd.x, y: wallBaseLine.y1 }, { x: wallBaseLine.x1, y: wallBaseLine.y1 })
+          newPStart.y = wallBaseLine.y2;
+          getAddLine({ x: newPStart.x, y: wallBaseLine.y2 }, { x: wallBaseLine.x2, y: wallBaseLine.y2 })
+        }
 
 
-      if(newPEnd.x <= wallBaseLine.x2 && wallBaseLine.x2 <= newPStart.x && newPStart.x <= wallBaseLine.x1){ //위 왼쪽
-        newPStart.x = wallBaseLine.x1;
-        getAddLine({x:wallBaseLine.x1, y:newPEnd.y}, {x:wallBaseLine.x1, y: wallBaseLine.y1})
-      } else if(wallBaseLine.x2 <= newPEnd.x && newPEnd.x <= wallBaseLine.x1 && wallBaseLine.x1 <= newPStart.x){ //아래오르쪽
-          newPEnd.x = wallBaseLine.x2;
-          getAddLine({x:wallBaseLine.x2, y:newPEnd.y}, {x:wallBaseLine.x2, y: wallBaseLine.y2})
+      } else if (getOrientation(roofLine) === 'horizontal') {
 
-      } else if(newPStart.x <= wallBaseLine.x1 && wallBaseLine.x1 <= newPEnd.x && newPEnd.x <= wallBaseLine.x2){  //위 오른쪽
-          newPEnd.x = wallBaseLine.x2;
-          getAddLine({x:wallBaseLine.x2, y:newPEnd.y}, {x:wallBaseLine.x2, y: wallBaseLine.y2})
 
-      } else if(wallBaseLine.x1 <= newPStart.x && newPStart.x <= wallBaseLine.x2 && wallBaseLine.x2 <= newPEnd.x){ //아래 왼쪽
+        if (newPEnd.x <= wallBaseLine.x2 && wallBaseLine.x2 <= newPStart.x && newPStart.x <= wallBaseLine.x1) { //위 왼쪽
           newPStart.x = wallBaseLine.x1;
-        getAddLine({x:wallBaseLine.x1, y:newPEnd.y}, {x:wallBaseLine.x1, y: wallBaseLine.y1})
+          getAddLine({ x: wallBaseLine.x1, y: newPEnd.y }, { x: wallBaseLine.x1, y: wallBaseLine.y1 })
+        } else if (wallBaseLine.x2 <= newPEnd.x && newPEnd.x <= wallBaseLine.x1 && wallBaseLine.x1 <= newPStart.x) { //아래오르쪽
+          newPEnd.x = wallBaseLine.x2;
+          getAddLine({ x: wallBaseLine.x2, y: newPEnd.y }, { x: wallBaseLine.x2, y: wallBaseLine.y2 })
 
-      } else if(wallBaseLine.x2 <= newPEnd.x && newPEnd.x <= newPStart.x && newPStart.x <= wallBaseLine.x1 ) { // 위가운데
+        } else if (newPStart.x <= wallBaseLine.x1 && wallBaseLine.x1 <= newPEnd.x && newPEnd.x <= wallBaseLine.x2) {  //위 오른쪽
+          newPEnd.x = wallBaseLine.x2;
+          getAddLine({ x: wallBaseLine.x2, y: newPEnd.y }, { x: wallBaseLine.x2, y: wallBaseLine.y2 })
 
-        newPEnd.x = wallBaseLine.x2;
-        getAddLine({x:wallBaseLine.x2, y:newPEnd.y}, {x:wallBaseLine.x2, y: wallBaseLine.y2})
-        newPStart.x = wallBaseLine.x1;
-        getAddLine({x:wallBaseLine.x1, y:newPEnd.y}, {x:wallBaseLine.x1, y: wallBaseLine.y1})
+        } else if (wallBaseLine.x1 <= newPStart.x && newPStart.x <= wallBaseLine.x2 && wallBaseLine.x2 <= newPEnd.x) { //아래 왼쪽
+          newPStart.x = wallBaseLine.x1;
+          getAddLine({ x: wallBaseLine.x1, y: newPEnd.y }, { x: wallBaseLine.x1, y: wallBaseLine.y1 })
 
-      } else if(wallBaseLine.x1 <= newPStart.x &&newPStart.x <= newPEnd.x&&newPEnd.x <= wallBaseLine.x2 ) { // 아래가운데
-        newPEnd.x = wallBaseLine.x1;
-        getAddLine({x:wallBaseLine.x1, y:newPEnd.y}, {x:wallBaseLine.x1, y: wallBaseLine.y1})
-        newPStart.x = wallBaseLine.x2;
-        getAddLine({x:wallBaseLine.x2, y:newPEnd.y}, {x:wallBaseLine.x2, y: wallBaseLine.y2})
+        } else if (wallBaseLine.x2 <= newPEnd.x && newPEnd.x <= newPStart.x && newPStart.x <= wallBaseLine.x1) { // 위가운데
+
+          newPEnd.x = wallBaseLine.x2;
+          getAddLine({ x: wallBaseLine.x2, y: newPEnd.y }, { x: wallBaseLine.x2, y: wallBaseLine.y2 })
+          newPStart.x = wallBaseLine.x1;
+          getAddLine({ x: wallBaseLine.x1, y: newPEnd.y }, { x: wallBaseLine.x1, y: wallBaseLine.y1 })
+
+        } else if (wallBaseLine.x1 <= newPStart.x && newPStart.x <= newPEnd.x && newPEnd.x <= wallBaseLine.x2) { // 아래가운데
+          newPEnd.x = wallBaseLine.x1;
+          getAddLine({ x: wallBaseLine.x1, y: newPEnd.y }, { x: wallBaseLine.x1, y: wallBaseLine.y1 })
+          newPStart.x = wallBaseLine.x2;
+          getAddLine({ x: wallBaseLine.x2, y: newPEnd.y }, { x: wallBaseLine.x2, y: wallBaseLine.y2 })
+        }
       }
-    }
-    getAddLine(newPStart, newPEnd)
-    movedLines.push({ index, newPStart, newPEnd })
-   
-  }
-  
-  else if(movedStart) {  //end 변경경
-   
-    
-    newPStart = {x:roofLine.x1, y:roofLine.y1}
+      getAddLine(newPStart, newPEnd, 'red')
+      movedLines.push({ index, newPStart, newPEnd })
 
-    if(getOrientation(roofLine) === 'vertical'){
+    } else if (movedStart) {  //end 변경경
 
-      let isCross = false
-      if(Math.abs(currentRoofLine.x2 - roofLine.x1) < 0.1 || Math.abs(currentRoofLine.x1 - roofLine.x2) < 0.1){
+
+      newPStart = { x: roofLine.x1, y: roofLine.y1 }
+
+      if (getOrientation(roofLine) === 'vertical') {
+
+        let isCross = false
+        if (Math.abs(currentRoofLine.x2 - roofLine.x1) < 0.1 || Math.abs(currentRoofLine.x1 - roofLine.x2) < 0.1) {
           isCross = true;
-      }
+        }
 
 
-      newPEnd = {x:roofLine.x1, y:(isCross)? currentRoofLine.y2:origin.y1}
+        newPEnd = { x: roofLine.x1, y: (isCross) ? currentRoofLine.y1 : origin.y1 }
 
-    }else if(getOrientation(roofLine) === 'horizontal') {
+      } else if (getOrientation(roofLine) === 'horizontal') {
 
-      let isCross = false
-      if(Math.abs(currentRoofLine.y1 - roofLine.y2) < 0.1 || Math.abs(currentRoofLine.y2 - roofLine.y1) < 0.1){
+        let isCross = false
+        if (Math.abs(currentRoofLine.y1 - roofLine.y2) < 0.1 || Math.abs(currentRoofLine.y2 - roofLine.y1) < 0.1) {
           isCross = true;
+        }
+
+        newPEnd = { x: (isCross) ? currentRoofLine.x1 : origin.x1, y: roofLine.y1 } //수직라인 접점까지지
+
       }
 
-      newPEnd = {x:(isCross)? currentRoofLine.x2:origin.x1, y:roofLine.y1} //수직라인 접점까지지
-    
+      movedLines.push({ index, newPStart, newPEnd })
+      console.log("moveStart:::::::::::::", origin, newPStart, newPEnd)
+      getAddLine(newPStart, newPEnd, 'red')
+
+
+    } else if (movedEnd) {  //start변경
+
+      //반시계방향
+      newPStart = { x: roofLine.x2, y: roofLine.y2 }
+
+      if (getOrientation(roofLine) === 'vertical') {
+
+        let isCross = false
+        if (Math.abs(currentRoofLine.x2 - roofLine.x1) < 0.1 || Math.abs(currentRoofLine.x1 - roofLine.x2) < 0.1) {
+          isCross = true;
+        }
+        newPEnd = { x: roofLine.x2, y: (isCross) ? currentRoofLine.y2 : origin.y2 } //수직라인 접점까지지
+
+      } else if (getOrientation(roofLine) === 'horizontal') {
+
+        let isCross = false
+        if (Math.abs(currentRoofLine.y2 - roofLine.y1) < 0.1 || Math.abs(currentRoofLine.y1 - roofLine.y2) < 0.1) {
+          isCross = true;
+        }
+
+        newPEnd = { x: (isCross) ? currentRoofLine.x2 : origin.x2, y: roofLine.y2 } //수직라인 접점까지지
+
+      }
+      console.log("movedEnd:::::::::::::", origin, newPStart, newPEnd)
+      getAddLine(newPStart, newPEnd, 'orange')
+      movedLines.push({ index, newPStart, newPEnd })
+
     }
 
-    movedLines.push({ index, newPStart, newPEnd })
-    console.log("moveStart:::::::::::::", origin, newPStart, newPEnd)
-    getAddLine(newPStart, newPEnd)
+    canvas.renderAll()
 
 
-  }else if(movedEnd) {  //start변경
-    
-    //반시계방향
-    newPStart = {x:roofLine.x2, y:roofLine.y2}
-
-    if(getOrientation(roofLine) === 'vertical'){
-
-      let isCross = false
-      if(Math.abs(currentRoofLine.x2 - roofLine.x1) < 0.1 || Math.abs(currentRoofLine.x1 - roofLine.x2) < 0.1){
-          isCross = true;
-      }
-      newPEnd = {x:roofLine.x2, y:(isCross)? currentRoofLine.y1:origin.y2} //수직라인 접점까지지
-
-    }else if(getOrientation(roofLine) === 'horizontal') {
-
-      let isCross = false
-      if(Math.abs(currentRoofLine.y2 - roofLine.y1) < 0.1 || Math.abs(currentRoofLine.y1 - roofLine.y2) < 0.1){
-          isCross = true;
-      }
-
-      newPEnd = {x:(isCross)? currentRoofLine.x1:origin.x2, y:roofLine.y2} //수직라인 접점까지지
-    
-    }
-    console.log("movedEnd:::::::::::::", origin, newPStart, newPEnd)
-    getAddLine(newPStart, newPEnd)
-    movedLines.push({ index, newPStart, newPEnd })
-    
-  }
- 
-   canvas.renderAll()
-    
-   
-
-    
-   
- 
- 
-});
+  });
 
 //polygon 만들기
-console.log("innerLines:::::", innerLines)
-console.log("movedLines", movedLines)
-
+  console.log("innerLines:::::", innerLines)
+  console.log("movedLines", movedLines)
+}
 // --- 사용 예시 ---
 // const polygons = findConnectedLines(movedLines, innerLines, canvas, roofId, roof);
 // console.log("polygon", polygons);
@@ -886,18 +979,18 @@ console.log("movedLines", movedLines)
     let p1,p2,p3, p4
      let idx = 0;
      let isMoveLine = false;
-     
+
      if (wallLine.startPoint.x !== wallLine.x1) wallLine.startPoint.x = wallLine.x1
      if (wallLine.startPoint.y !== wallLine.y1) wallLine.startPoint.y = wallLine.y1
      if (wallLine.endPoint.x !== wallLine.x2) wallLine.endPoint.x = wallLine.x2
      if (wallLine.endPoint.y !== wallLine.y2) wallLine.endPoint.y = wallLine.y2
-     
+
     const wallLineStartPoint = {x:wallLine.x1, y:wallLine.y1}
     const wallLineEndPoint = {x:wallLine.x2, y:wallLine.y2}
     const moveLine = wall.baseLines[index] //이동한 wall 존재여부 (초기 wall line = base line)
 
        if(index === 2){
-        
+
        }
 
 // // 사용자가 라인을 드래그하기 시작할 때
@@ -910,13 +1003,13 @@ console.log("movedLines", movedLines)
 //   .map((line, index) => ({ index, line }))
 //   .filter(({ line }) => line.attributes.isUserMoved)
 
-   
+
 // Then in your code:
 
   if (!moveLine?.attributes?.originPoint) return
 
   const { originPoint } = moveLine.attributes
-  const moved = 
+  const moved =
     (Math.abs(moveLine.x1 - originPoint.x1) > 0.1 ||
     Math.abs(moveLine.y1 - originPoint.y1) > 0.1 )||(
     Math.abs(moveLine.x2 - originPoint.x2) > 0.1 ||
@@ -938,7 +1031,7 @@ console.log("movedLines", movedLines)
 
     const getPolygonOrientation = baseLines => {
       if (!baseLines?.length) return 0
-    
+
       const area2 = baseLines.reduce((sum, line) => {
         const x1 = line.get('x1')
         const y1 = line.get('y1')
@@ -946,10 +1039,10 @@ console.log("movedLines", movedLines)
         const y2 = line.get('y2')
         return sum + (x2 - x1) * (y2 + y1)   // shoelace 변형
       }, 0)
-    
+
       return Math.sign(area2)  // +1: CCW, -1: CW, 0: 불명
     }
-      
+
     const lineOrientation = (line, polygonOrientation) => {
       const x1 = line.get('x1')
       const y1 = line.get('y1')
@@ -978,7 +1071,7 @@ console.log("movedLines", movedLines)
     })
     // 기존 로직도 이어서 실행
     console.log("moveLine", movedLines)
-    
+
 
     movedLines.forEach(({ index, moveLine, wallLine }) => {
       console.log(`사용자가 움직인 선 index: ${index}, wallLineId: ${wallLine.id}`)
@@ -996,7 +1089,7 @@ console.log("movedLines", movedLines)
         same(a.x2, a.y2, b.x2, b.y2)
       )
     }
-    
+
     const angleBetween = a => b => {
       const va = { x: a.x2 - a.x1, y: a.y2 - a.y1 }
       const vb = { x: b.x2 - b.x1, y: b.y2 - b.y1 }
@@ -1004,7 +1097,7 @@ console.log("movedLines", movedLines)
       const mag = Math.hypot(va.x, va.y) * Math.hypot(vb.x, vb.y)
       return Math.acos(Math.min(Math.max(dot / mag, -1), 1)) * 180 / Math.PI
     }
-    
+
     const rightAngles = []
     movedLines.forEach((a, i) => {
       movedLines.slice(i + 1).forEach(b => {
@@ -1024,14 +1117,14 @@ console.log("movedLines", movedLines)
       canvas.add(testLine)
       canvas.renderAll()
     }
-    
-    
+
+
 
   }
 // movedLines => [{ line: moveLineObj, index }, ...] : 이동된 것만 담김
 
 if (moved) {
-  
+
 }
 
 
@@ -3987,3 +4080,49 @@ function findConnectedLines(aLines, bLines, canvas, roofId, roof) {
   return results;
 }
 
+export const processEaveHelpLines = (lines) => {
+  if (!lines || lines.length === 0) return [];
+
+  // 수직/수평 라인 분류
+  const verticalLines = lines.filter(line => line.x1 === line.x2);
+  const horizontalLines = lines.filter(line => line.y1 === line.y2);
+
+  // 라인 정렬 및 병합
+  const mergedVertical = mergeLines(verticalLines, 'vertical');
+  const mergedHorizontal = mergeLines(horizontalLines, 'horizontal');
+
+  return [...mergedVertical, ...mergedHorizontal];
+};
+
+const mergeLines = (lines, direction) => {
+  if (lines.length < 2) return lines;
+
+  // 방향에 따라 정렬
+  lines.sort((a, b) => {
+    const aPos = direction === 'vertical' ? a.y1 : a.x1;
+    const bPos = direction === 'vertical' ? b.y1 : b.x1;
+    return aPos - bPos;
+  });
+
+  const merged = [];
+  let current = { ...lines[0] };
+
+  for (let i = 1; i < lines.length; i++) {
+    const line = lines[i];
+    const isConnected = direction === 'vertical'
+      ? current.y2 >= line.y1 - 1
+      : current.x2 >= line.x1 - 1;
+
+    if (isConnected) {
+      // 라인 병합
+      current.y2 = Math.max(current.y2, line.y2);
+      current.x2 = direction === 'vertical' ? current.x1 : current.x2;
+    } else {
+      merged.push(current);
+      current = { ...line };
+    }
+  }
+  merged.push(current);
+  return merged;
+};
+