diff --git a/src/util/skeleton-utils.js b/src/util/skeleton-utils.js
index 750d512b..5db8af4d 100644
--- a/src/util/skeleton-utils.js
+++ b/src/util/skeleton-utils.js
@@ -212,12 +212,14 @@ const movingLineFromSkeleton = (roofId, canvas) => {
               point.y = Big(point.y).plus(moveUpDownLength).toNumber();
             }
           }else if(moveDirection === 'out'){
-            if(isSamePoint(roof.basePoints[index], originalStartPoint)) {
-              point.y = Big(point.y).minus(moveUpDownLength).toNumber();
-            }
-            if (isSamePoint(roof.basePoints[index], originalEndPoint)) {
+            if(isSamePoint(roof.basePoints[index], originalStartPoint) || isSamePoint(roof.basePoints[index], originalEndPoint)) {
               point.y = Big(point.y).minus(moveUpDownLength).toNumber();
+              console.log('roof.basePoints[index]', roof.basePoints[index])
+              console.log('point.x::::', point)
+              console.log('originalStartPoint', originalStartPoint)
+              console.log('originalEndPoint', originalEndPoint)
             }
+
           }
 
         }else if(position === 'left'){
@@ -262,7 +264,69 @@ const movingLineFromSkeleton = (roofId, canvas) => {
       line.startPoint = newStartPoint;
       line.endPoint = newEndPoint;
     });
-    return newPoints;
+
+    /**
+     * 직선다각형을 이루지 못하는 좌표를 삭제합니다.
+     * @param {Array<object>} points - 폴리곤 좌표 배열
+     * @returns {Array<object>} 정리된 좌표 배열
+     */
+    function removeNonOrthogonalPoints(points) {
+      if (!points || points.length < 3) return points;
+
+      const EPSILON = 1.0;
+
+      const isOrthogonal = (p1, p2) =>
+        Math.abs(p1.x - p2.x) < EPSILON || Math.abs(p1.y - p2.y) < EPSILON;
+
+      let current = [...points];
+      let changed = true;
+
+      // 1. 대각선을 만드는 점 제거
+      while (changed && current.length >= 3) {
+        changed = false;
+        for (let i = 0; i < current.length; i++) {
+          const pPrev = current[(i - 1 + current.length) % current.length];
+          const pCurr = current[i];
+          const pNext = current[(i + 1) % current.length];
+
+          // 현재 점(pCurr)을 기준으로 앞뒤 연결이 모두 직교하지 않거나,
+          // 현재 점을 제거했을 때 앞뒤 점(pPrev, pNext)이 직교하게 된다면 현재 점이 불필요한 "꺾임"일 수 있음.
+          if (!isOrthogonal(pPrev, pCurr) || !isOrthogonal(pCurr, pNext)) {
+            if (isOrthogonal(pPrev, pNext)) {
+              current.splice(i, 1);
+              changed = true;
+              break;
+            }
+          }
+        }
+      }
+
+      // 2. 일직선상의 중간 점 제거 (수평 또는 수직선상에 세 점이 있는 경우)
+      changed = true;
+      while (changed && current.length >= 3) {
+        changed = false;
+        for (let i = 0; i < current.length; i++) {
+          const p1 = current[i];
+          const p2 = current[(i + 1) % current.length];
+          const p3 = current[(i + 2) % current.length];
+
+          if ((Math.abs(p1.x - p2.x) < EPSILON && Math.abs(p2.x - p3.x) < EPSILON) ||
+            (Math.abs(p1.y - p2.y) < EPSILON && Math.abs(p2.y - p3.y) < EPSILON)) {
+            current.splice((i + 1) % current.length, 1);
+            changed = true;
+            break;
+          }
+        }
+      }
+
+      return current;
+    }
+
+
+    const cleaned = removeNonOrthogonalPoints(newPoints);
+    console.log(cleaned); // 결과: 4개의 점만 남음 (P1, P2, P3, P4)
+
+    return cleaned;
   }
 }
 
@@ -376,7 +440,7 @@ export const skeletonBuilder = (roofId, canvas, textMode) => {
     canvas.set('skeleton', cleanSkeleton)
     canvas.renderAll()
 
-    console.log('skeleton rendered.', canvas)
+    //console.log('skeleton rendered.', canvas)
   } catch (e) {
     console.error('스켈레톤 생성 중 오류 발생:', e)
     if (canvas.skeletonStates) {
@@ -470,9 +534,14 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
       line.attributes.type === 'gable' && isSameLine(Begin.X, Begin.Y, End.X, End.Y, line)
     );
 
-    if (gableBaseLine) {
-      // Store current state before processing
-      const beforeGableProcessing = JSON.parse(JSON.stringify(skeletonLines));
+      if (gableBaseLine) {
+        // Store current state before processing - avoid circular refs by only picking needed data
+        const beforeGableProcessing = skeletonLines.map(line => ({
+          p1: { x: line.p1.x, y: line.p1.y },
+          p2: { x: line.p2.x, y: line.p2.y },
+          attributes: { ...line.attributes },
+          lineStyle: { ...line.lineStyle }
+        }));
 
       // if(canvas.skeletonLines.length > 0){
       //   skeletonLines = canvas.skeletonLines;
@@ -854,10 +923,13 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         } else {
                           getAddLine({ y: inLine.y2, x: inLine.x2 }, { y: bStartY, x: wallLine.x2 }, 'pink')
                         }
+                        getAddLine({ y: bStartY, x: wallLine.x2 }, { y: roofLine.y1, x: wallLine.x1 }, 'magenta')
+                        getAddLine({ y: newLine.y1, x: newLine.x1 }, { y: newLine.y2, x: wallLine.x2 }, 'Gray')
+                        findPoints.push({ y: aStartY, x: newPStart.x, position: 'left_out_start' })
+                      }else{
+                        newPStart.y = roofLine.y1
                       }
-                      getAddLine({ y: bStartY, x: wallLine.x2 }, { y: roofLine.y1, x: wallLine.x1 }, 'magenta')
-                      getAddLine({ y: newLine.y1, x: newLine.x1 }, { y: newLine.y2, x: wallLine.x2 }, 'Gray')
-                      findPoints.push({ y: aStartY, x: newPStart.x, position: 'left_out_start' })
+
                     } else {
                       const cLineY = Big(wallBaseLine.x1).minus(wallLine.x1).abs().toNumber()
                       newPStart.y = Big(newPStart.y).minus(cLineY).toNumber()
@@ -909,10 +981,13 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         } else {
                           getAddLine({ y: inLine.y1, x: inLine.x1 }, { y: bStartY, x: wallLine.x1 }, 'pink')
                         }
+                        getAddLine({ y: bStartY, x: wallLine.x1 }, { y: roofLine.y2, x: wallLine.x2 }, 'magenta')
+                        getAddLine({ y: newLine.y2, x: newLine.x2 }, { y: newLine.y1, x: wallLine.x1 }, 'Gray')
+                        findPoints.push({ y: aStartY, x: newPEnd.x, position: 'left_out_end' })
+                      }else{
+                        newPEnd.y = roofLine.y2
                       }
-                      getAddLine({ y: bStartY, x: wallLine.x1 }, { y: roofLine.y2, x: wallLine.x2 }, 'magenta')
-                      getAddLine({ y: newLine.y2, x: newLine.x2 }, { y: newLine.y1, x: wallLine.x1 }, 'Gray')
-                      findPoints.push({ y: aStartY, x: newPEnd.x, position: 'left_out_end' })
+
                     } else {
                       const cLineY = Big(wallBaseLine.x2).minus(wallLine.x2).abs().toNumber()
                       newPEnd.y = Big(newPEnd.y).plus(cLineY).toNumber()
@@ -1024,10 +1099,13 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         } else {
                           getAddLine({ y: inLine.y1, x: inLine.x1 }, { y: bStartY, x: wallLine.x2 }, 'pink')
                         }
+                        getAddLine({ y: bStartY, x: wallLine.x2 }, { y: roofLine.y1, x: wallLine.x1 }, 'magenta')
+                        getAddLine({ y: newLine.y1, x: newLine.x1 }, { y: newLine.y2, x: wallLine.x2 }, 'Gray')
+                        findPoints.push({ y: aStartY, x: newPEnd.x, position: 'right_out_start' })
+                      }else{
+                        newPStart.y = roofLine.y1
                       }
-                      getAddLine({ y: bStartY, x: wallLine.x2 }, { y: roofLine.y1, x: wallLine.x1 }, 'magenta')
-                      getAddLine({ y: newLine.y1, x: newLine.x1 }, { y: newLine.y2, x: wallLine.x2 }, 'Gray')
-                      findPoints.push({ y: aStartY, x: newPEnd.x, position: 'right_out_start' })
+
                     } else {
                       const cLineY = Big(wallBaseLine.x1).minus(wallLine.x1).abs().toNumber()
                       newPStart.y = Big(newPStart.y).plus(cLineY).toNumber()
@@ -1213,10 +1291,13 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         } else {
                           getAddLine({ x: inLine.x1, y: inLine.y1 }, { x: bStartX, y: wallLine.y1 }, 'pink')
                         }
+                        getAddLine({ x: bStartX, y: wallLine.y1 }, { x: roofLine.x1, y: wallLine.y1 }, 'magenta')
+                        getAddLine({ x: newLine.x1, y: newLine.y1 }, { x: newLine.x1, y: wallLine.y1 }, 'Gray')
+                        findPoints.push({ x: aStartX, y: newPEnd.y, position: 'top_out_start' })
+                      }else{  //라인머지
+                        newPStart.x = roofLine.x1
                       }
-                      getAddLine({ x: bStartX, y: wallLine.y1 }, { x: roofLine.x1, y: wallLine.y1 }, 'magenta')
-                      getAddLine({ x: newLine.x1, y: newLine.y1 }, { x: newLine.x1, y: wallLine.y1 }, 'Gray')
-                      findPoints.push({ x: aStartX, y: newPEnd.y, position: 'top_out_start' })
+
                     } else {
                       const cLineX = Big(wallBaseLine.y1).minus(wallLine.y1).abs().toNumber()
                       newPStart.x = Big(newPStart.x).plus(cLineX).toNumber()
@@ -1265,10 +1346,13 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         } else {
                           getAddLine({ x: inLine.x1, y: inLine.y1 }, { x: bStartX, y: wallLine.y1 }, 'pink')
                         }
+                        getAddLine({ x: bStartX, y: wallLine.y1 }, { x: roofLine.x2, y: wallLine.y2 }, 'magenta')
+                        getAddLine({ x: newLine.x2, y: newLine.y2 }, { x: newLine.x1, y: wallLine.y1 }, 'Gray')
+                        findPoints.push({ x: aStartX, y: newPEnd.y, position: 'top_out_end' })
+                      }else{
+                        newPEnd.x = roofLine.x2
                       }
-                      getAddLine({ x: bStartX, y: wallLine.y1 }, { x: roofLine.x2, y: wallLine.y2 }, 'magenta')
-                      getAddLine({ x: newLine.x2, y: newLine.y2 }, { x: newLine.x1, y: wallLine.y1 }, 'Gray')
-                      findPoints.push({ x: aStartX, y: newPEnd.y, position: 'top_out_end' })
+
                     } else {
                       const cLineX = Big(wallLine.y2).minus(wallBaseLine.y2).abs().toNumber()
                       newPEnd.x = Big(newPEnd.x).minus(cLineX).toNumber()
@@ -1375,10 +1459,13 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         } else {
                           getAddLine({ x: inLine.x1, y: inLine.y1 }, { x: bStartX, y: wallLine.y1 }, 'pink')
                         }
+                        getAddLine({ x: bStartX, y: wallLine.y1 }, { x: roofLine.x1, y: wallLine.y1 }, 'magenta')
+                        getAddLine({ x: newLine.x1, y: newLine.y1 }, { x: newLine.x1, y: wallLine.y1 }, 'Gray')
+                        findPoints.push({ x: aStartX, y: newPEnd.y, position: 'bottom_out_start' })
+                      }else {
+                        newPStart.x = roofLine.x1
                       }
-                      getAddLine({ x: bStartX, y: wallLine.y1 }, { x: roofLine.x1, y: wallLine.y1 }, 'magenta')
-                      getAddLine({ x: newLine.x1, y: newLine.y1 }, { x: newLine.x1, y: wallLine.y1 }, 'Gray')
-                      findPoints.push({ x: aStartX, y: newPEnd.y, position: 'bottom_out_start' })
+
                     } else {
                       const cLineX = Big(wallBaseLine.y1).minus(wallLine.y1).abs().toNumber()
                       newPStart.x = Big(newPStart.x).minus(cLineX).toNumber()
@@ -1429,10 +1516,13 @@ const createInnerLinesFromSkeleton = (roofId, canvas, skeleton, textMode) => {
                         } else {
                           getAddLine({ x: inLine.x1, y: inLine.y1 }, { x: bStartX, y: wallLine.y1 }, 'pink')
                         }
+                        getAddLine({ x: bStartX, y: wallLine.y1 }, { x: roofLine.x2, y: wallLine.y2 }, 'magenta')
+                        getAddLine({ x: newLine.x2, y: newLine.y2 }, { x: newLine.x1, y: wallLine.y1 }, 'Gray')
+                        findPoints.push({ x: aStartX, y: newPEnd.y, position: 'bottom_out_end' })
+                      }else{
+                        newPEnd.x = roofLine.x2
                       }
-                      getAddLine({ x: bStartX, y: wallLine.y1 }, { x: roofLine.x2, y: wallLine.y2 }, 'magenta')
-                      getAddLine({ x: newLine.x2, y: newLine.y2 }, { x: newLine.x1, y: wallLine.y1 }, 'Gray')
-                      findPoints.push({ x: aStartX, y: newPEnd.y, position: 'bottom_out_end' })
+
                     } else {
                       const cLineX = Big(wallBaseLine.y2).minus(wallLine.y2).abs().toNumber()
                       newPEnd.x = Big(newPEnd.x).plus(cLineX).toNumber()
@@ -3424,58 +3514,77 @@ function getTurnDirection(p1, p2, p3) {
 function isValleyVertex(targetPoint, connectedLine, allLines, isStartVertex) {
   const tolerance = 0.1;
 
-  // 1. 연결된 '다른' 라인을 찾습니다.
-  // isStartVertex가 true면 : 이 점으로 '들어오는' 라인(Previous Line)을 찾아야 함
-  // isStartVertex가 false면 : 이 점에서 '나가는' 라인(Next Line)을 찾아야 함
+  const connectedLineData = {
+    x1: connectedLine.x1 ?? connectedLine.get?.('x1'),
+    y1: connectedLine.y1 ?? connectedLine.get?.('y1'),
+    x2: connectedLine.x2 ?? connectedLine.get?.('x2'),
+    y2: connectedLine.y2 ?? connectedLine.get?.('y2'),
+    startPoint: connectedLine.startPoint,
+    endPoint: connectedLine.endPoint
+  };
 
   let neighborLine = null;
 
   if (isStartVertex) {
-    // targetPoint가 Start이므로, 어떤 라인의 End가 targetPoint와 같아야 함 (Previous Line)
-    neighborLine = allLines.find(l =>
-      l !== connectedLine &&
-      isSamePoint(l.endPoint || {x:l.x2, y:l.y2}, targetPoint, tolerance)
-    );
+    neighborLine = allLines.find(l => {
+      if (l === connectedLine) return false;
+      const lx1 = l.x1 ?? l.get?.('x1');
+      const ly1 = l.y1 ?? l.get?.('y1');
+      const lx2 = l.x2 ?? l.get?.('x2');
+      const ly2 = l.y2 ?? l.get?.('y2');
+      const end = l.endPoint || { x: lx2, y: ly2 };
+      return isSamePoint(end, targetPoint, tolerance);
+    });
   } else {
-    // targetPoint가 End이므로, 어떤 라인의 Start가 targetPoint와 같아야 함 (Next Line)
-    neighborLine = allLines.find(l =>
-      l !== connectedLine &&
-      isSamePoint(l.startPoint || {x:l.x1, y:l.y1}, targetPoint, tolerance)
-    );
+    neighborLine = allLines.find(l => {
+      if (l === connectedLine) return false;
+      const lx1 = l.x1 ?? l.get?.('x1');
+      const ly1 = l.y1 ?? l.get?.('y1');
+      const lx2 = l.x2 ?? l.get?.('x2');
+      const ly2 = l.y2 ?? l.get?.('y2');
+      const start = l.startPoint || { x: lx1, y: ly1 };
+      return isSamePoint(start, targetPoint, tolerance);
+    });
   }
 
-  // 연결된 라인을 못 찾았거나 끊겨있으면 판단 불가 (일단 false)
   if (!neighborLine) return false;
 
-  // 2. 세 점을 구성하여 회전 방향(Turn) 계산
-  // 순서: PrevLine.Start -> [TargetVertex] -> NextLine.End
+  const nlx1 = neighborLine.x1 ?? neighborLine.get?.('x1');
+  const nly1 = neighborLine.y1 ?? neighborLine.get?.('y1');
+  const nlx2 = neighborLine.x2 ?? neighborLine.get?.('x2');
+  const nly2 = neighborLine.y2 ?? neighborLine.get?.('y2');
+
+  const clx1 = connectedLineData.x1;
+  const cly1 = connectedLineData.y1;
+  const clx2 = connectedLineData.x2;
+  const cly2 = connectedLineData.y2;
+
   let p1, p2, p3;
 
   if (isStartVertex) {
-    // neighbor(Prev) -> connected(Current)
-    p1 = neighborLine.startPoint || {x: neighborLine.x1, y: neighborLine.y1};
-    p2 = targetPoint; // 접점
-    p3 = connectedLine.endPoint || {x: connectedLine.x2, y: connectedLine.y2};
+    p1 = neighborLine.startPoint || { x: nlx1, y: nly1 };
+    p2 = targetPoint;
+    p3 = connectedLineData.endPoint || { x: clx2, y: cly2 };
   } else {
-    // connected(Current) -> neighbor(Next)
-    p1 = connectedLine.startPoint || {x: connectedLine.x1, y: connectedLine.y1};
-    p2 = targetPoint; // 접점
-    p3 = neighborLine.endPoint || {x: neighborLine.x2, y: neighborLine.y2};
+    p1 = connectedLineData.startPoint || { x: clx1, y: cly1 };
+    p2 = targetPoint;
+    p3 = neighborLine.endPoint || { x: nlx2, y: nly2 };
   }
 
-  // 3. 외적 계산 (Y축이 아래로 증가하는 캔버스 좌표계 + CCW 진행 기준)
-  // 값이 양수(+)면 오른쪽 턴 = 골짜기
   const crossProduct = getTurnDirection(p1, p2, p3);
-
   return crossProduct > 0;
 }
 
 function findInteriorPoint(line, polygonLines) {
-  const { x1, y1, x2, y2 } = line;
+  const x1 = line.x1 ?? line.get?.('x1');
+  const y1 = line.y1 ?? line.get?.('y1');
+  const x2 = line.x2 ?? line.get?.('x2');
+  const y2 = line.y2 ?? line.get?.('y2');
 
-  // line 객체 포맷 통일
+  // line 객체 포맷 통일 (함수 내부용)
   const currentLine = {
     ...line,
+    x1, y1, x2, y2,
     startPoint: { x: x1, y: y1 },
     endPoint: { x: x2, y: y2 }
   };
@@ -3486,9 +3595,32 @@ function findInteriorPoint(line, polygonLines) {
   // 2. 끝점이 골짜기인지 확인
   const endIsValley = isValleyVertex(currentLine.endPoint, currentLine, polygonLines, false);
 
+  // 3. 라인의 방향성 확인
+  const isHorizontal = y1 === y2;  // 정확히 수평
+  const isVertical = x1 === x2;    // 정확히 수직
+  const isLeftToRight = x1 < x2;   // 왼쪽에서 오른쪽 방향
+  const isTopToBottom = y1 < y2;   // 위에서 아래 방향
+
+  // 4. 평행한 라인 중에서 start 또는 end가 true인 경우 isParallelWithValley = true
+  let isParallelWithValley = false;
+  if (isHorizontal || isVertical) {
+    if (isHorizontal) {
+      // 수평선인 경우: 왼쪽이 start, 오른쪽이 end
+      if ((isLeftToRight && startIsValley) || (!isLeftToRight && endIsValley)) {
+        isParallelWithValley = true;
+      }
+    } else {
+      // 수직선인 경우: 위가 start, 아래가 end
+      if ((isTopToBottom && startIsValley) || (!isTopToBottom && endIsValley)) {
+        isParallelWithValley = true;
+      }
+    }
+  }
+
   return {
     start: startIsValley,
-    end: endIsValley
+    end: endIsValley,
+    isParallel: isParallelWithValley
   };
 }