diff --git a/src/util/qpolygon-utils.js b/src/util/qpolygon-utils.js
index ac1f46f7..222e829e 100644
--- a/src/util/qpolygon-utils.js
+++ b/src/util/qpolygon-utils.js
@@ -2426,9 +2426,20 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
       intersections.sort((a, b) => a.distance - b.distance)
       if (intersections.length > 0) {
         const intersect = intersections[0].intersect
+        const point = [midPoint.x, midPoint.y, intersect.x, intersect.y]
+
+        //마루가 최대로 뻗어나갈수 있는 포인트. null일때는 맞은편 지붕선 까지로 판단한다.
+        const drivePoint = getRidgeDrivePoints(point, prevLine, nextLine, baseLines, canvas)
+
+        console.log('drivePoint : ', drivePoint)
+        if (drivePoint) {
+          point[2] = drivePoint.x
+          point[3] = drivePoint.y
+        }
+
         linesAnalysis.push({
-          start: { x: midPoint.x, y: midPoint.y },
-          end: { x: intersect.x, y: intersect.y },
+          start: { x: point[0], y: point[1] },
+          end: { x: point[2], y: point[3] },
           left: baseLines.findIndex((line) => line === prevLine),
           right: baseLines.findIndex((line) => line === nextLine),
           type: 'ridge',
@@ -2559,7 +2570,169 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
     })
   })
   //4. 반절처(반절마루) 판단, 반절마루는 양옆이 처마여야 한다.
+  jerkinHeads.forEach((currentLine) => {
+    let prevLine, nextLine
+    baseLines.forEach((baseLine, index) => {
+      if (baseLine === currentLine) {
+        nextLine = baseLines[(index + 1) % baseLines.length]
+        prevLine = baseLines[(index - 1 + baseLines.length) % baseLines.length]
+      }
+    })
+
+    //양옆이 처마가 아닐때 패스
+    if (prevLine.attributes.type !== LINE_TYPE.WALLLINE.EAVES || nextLine.attributes.type !== LINE_TYPE.WALLLINE.EAVES) {
+      return
+    }
+
+    const analyze = analyzeLine(currentLine)
+    const roofPoints = [analyze.roofLine.x1, analyze.roofLine.y1, analyze.roofLine.x2, analyze.roofLine.y2]
+
+    const prevLineVector = { x: Math.sign(prevLine.x1 - prevLine.x2), y: Math.sign(prevLine.y1 - prevLine.y2) }
+    const nextLineVector = { x: Math.sign(nextLine.x1 - nextLine.x2), y: Math.sign(nextLine.y1 - nextLine.y2) }
+    if (prevLineVector.x === nextLineVector.x && prevLineVector.y === nextLineVector.y) {
+      //반절마루 생성불가이므로 지붕선만 추가하고 끝냄
+      innerLines.push(drawRoofLine(roofPoints, canvas, roof, textMode))
+    } else {
+      const midX = (roofPoints[0] + roofPoints[2]) / 2
+      const midY = (roofPoints[1] + roofPoints[3]) / 2
+
+      const currentDegree = getDegreeByChon(currentLine.attributes.pitch)
+      const prevDegree = getDegreeByChon(prevLine.attributes.pitch)
+      const nextDegree = getDegreeByChon(nextLine.attributes.pitch)
+      const gableWidth = currentLine.attributes.width
+
+      const roofVector = { x: Math.sign(roofPoints[2] - roofPoints[0]), y: Math.sign(roofPoints[3] - roofPoints[1]) }
+      const roofDx = roofPoints[0] - roofPoints[2]
+      const roofDy = roofPoints[1] - roofPoints[3]
+      const roofLength = Math.sqrt(roofDx * roofDx + roofDy * roofDy)
+      const lineLength = (roofLength - gableWidth) / 2
+      const jerkinPoints = []
+      jerkinPoints.push(
+        { x: roofPoints[0], y: roofPoints[1] },
+        { x: roofPoints[0] + roofVector.x * lineLength, y: roofPoints[1] + roofVector.y * lineLength },
+      )
+      jerkinPoints.push({ x: jerkinPoints[1].x + roofVector.x * gableWidth, y: jerkinPoints[1].y + roofVector.y * gableWidth })
+      jerkinPoints.push({ x: jerkinPoints[2].x + roofVector.x * lineLength, y: jerkinPoints[2].y + roofVector.y * lineLength })
+
+      if (gableWidth >= roofLength) {
+        innerLines.push(drawRoofLine(roofPoints, canvas, roof, textMode))
+      } else if (jerkinPoints.length === 4) {
+        const gablePoint1 = [jerkinPoints[0].x, jerkinPoints[0].y, jerkinPoints[1].x, jerkinPoints[1].y]
+        const gablePoint2 = [jerkinPoints[1].x, jerkinPoints[1].y, jerkinPoints[2].x, jerkinPoints[2].y]
+        const gablePoint3 = [jerkinPoints[2].x, jerkinPoints[2].y, jerkinPoints[3].x, jerkinPoints[3].y]
+        const gableLength1 = Math.sqrt(Math.pow(gablePoint1[2] - gablePoint1[0], 2) + Math.pow(gablePoint1[3] - gablePoint1[1], 2))
+        const gableLength2 = Math.sqrt(Math.pow(gablePoint2[2] - gablePoint2[0], 2) + Math.pow(gablePoint2[3] - gablePoint2[1], 2))
+        const gableLength3 = Math.sqrt(Math.pow(gablePoint3[2] - gablePoint3[0], 2) + Math.pow(gablePoint3[3] - gablePoint3[1], 2))
+        if (gableLength1 >= 1) {
+          innerLines.push(drawHipLine(gablePoint1, canvas, roof, textMode, null, prevDegree, prevDegree))
+        }
+        if (gableLength2 >= 1) {
+          innerLines.push(drawRoofLine(gablePoint2, canvas, roof, textMode))
+        }
+        if (gableLength3 >= 1) {
+          innerLines.push(drawHipLine(gablePoint3, canvas, roof, textMode, null, nextDegree, nextDegree))
+        }
+
+        const currentRoofLine = analyze.roofLine
+        let prevRoofLine, nextRoofLine
+        roof.lines.forEach((roofLine, index) => {
+          if (roofLine === currentRoofLine) {
+            nextRoofLine = roof.lines[(index + 1) % roof.lines.length]
+            prevRoofLine = roof.lines[(index - 1 + roof.lines.length) % roof.lines.length]
+          }
+        })
+
+        /** 이전, 다음라인의 사잇각의 vector를 구한다. */
+        let prevVector = getHalfAngleVector(prevRoofLine, currentRoofLine)
+        let nextVector = getHalfAngleVector(currentRoofLine, nextRoofLine)
+
+        /** 이전 라인과의 사이 추녀마루의 각도를 확인한다, 각도가 지붕안쪽으로 향하지 않을때 반대로 처리한다.*/
+        const prevCheckPoint = {
+          x: currentRoofLine.x1 + prevVector.x * 10,
+          y: currentRoofLine.y1 + prevVector.y * 10,
+        }
+        /** 다음 라인과의 사이 추녀마루의 각도를 확인한다, 각도가 지붕안쪽으로 향하지 않을때 반대로 처리한다.*/
+        const nextCheckPoint = {
+          x: currentRoofLine.x2 + nextVector.x * 10,
+          y: currentRoofLine.y2 + nextVector.y * 10,
+        }
+
+        let prevHipVector, nextHipVector
+
+        if (roof.inPolygon(prevCheckPoint)) {
+          prevHipVector = { x: prevVector.x, y: prevVector.y }
+        } else {
+          prevHipVector = { x: -prevVector.x, y: -prevVector.y }
+        }
+
+        /** 다음 라인과의 사이 추녀마루의 각도를 확인한다, 각도가 지붕안쪽으로 향하지 않을때 반대로 처리한다.*/
+        if (roof.inPolygon(nextCheckPoint)) {
+          nextHipVector = { x: nextVector.x, y: nextVector.y }
+        } else {
+          nextHipVector = { x: -nextVector.x, y: -nextVector.y }
+        }
+
+        const prevHipEdge = {
+          vertex1: { x: gablePoint2[0], y: gablePoint2[1] },
+          vertex2: { x: gablePoint2[0] + prevHipVector.x * gableWidth, y: gablePoint2[1] + prevHipVector.y * gableWidth },
+        }
+        const nextHipEdge = {
+          vertex1: { x: gablePoint2[2], y: gablePoint2[3] },
+          vertex2: { x: gablePoint2[2] + nextHipVector.x * gableWidth, y: gablePoint2[3] + nextHipVector.y * gableWidth },
+        }
+
+        const hipIntersection = edgesIntersection(prevHipEdge, nextHipEdge)
+        if (hipIntersection) {
+          const prevHipPoint = [prevHipEdge.vertex1.x, prevHipEdge.vertex1.y, hipIntersection.x, hipIntersection.y]
+          const nextHipPoint = [nextHipEdge.vertex1.x, nextHipEdge.vertex1.y, hipIntersection.x, hipIntersection.y]
+          innerLines.push(drawHipLine(prevHipPoint, canvas, roof, textMode, null, currentDegree, currentDegree))
+          innerLines.push(drawHipLine(nextHipPoint, canvas, roof, textMode, null, currentDegree, currentDegree))
+
+          const midPoint = { x: hipIntersection.x, y: hipIntersection.y }
+          const checkEdge = {
+            vertex1: { x: midPoint.x, y: midPoint.y },
+            vertex2: { x: midPoint.x + -analyze.roofVector.x * 10000, y: midPoint.y + -analyze.roofVector.y * 10000 },
+          }
+          const intersections = []
+          roof.lines
+            .filter((line) => line !== currentRoofLine)
+            .forEach((line) => {
+              const lineEdge = { vertex1: { x: line.x1, y: line.y1 }, vertex2: { x: line.x2, y: line.y2 } }
+              const intersect = edgesIntersection(lineEdge, checkEdge)
+              if (intersect && isPointOnLineNew(line, intersect)) {
+                const distance = Math.sqrt(Math.pow(midPoint.x - intersect.x, 2) + Math.pow(midPoint.y - intersect.y, 2))
+                intersections.push({ intersect, distance })
+              }
+            })
+          intersections.sort((a, b) => a.distance - b.distance)
+          if (intersections.length > 0) {
+            const intersect = intersections[0].intersect
+            const point = [midPoint.x, midPoint.y, intersect.x, intersect.y]
+
+            //마루가 최대로 뻗어나갈수 있는 포인트. null일때는 맞은편 지붕선 까지로 판단한다.
+            const drivePoint = getRidgeDrivePoints(point, prevLine, nextLine, baseLines, canvas)
+
+            console.log('drivePoint : ', drivePoint)
+            if (drivePoint) {
+              point[2] = drivePoint.x
+              point[3] = drivePoint.y
+            }
+
+            linesAnalysis.push({
+              start: { x: point[0], y: point[1] },
+              end: { x: point[2], y: point[3] },
+              left: baseLines.findIndex((line) => line === prevLine),
+              right: baseLines.findIndex((line) => line === nextLine),
+              type: 'ridge',
+              degree: 0,
+            })
+          }
+        }
+      }
+    }
+  })
   //5. 케라바 판단, 케라바는 양옆이 처마여야 한다.
+  gables.forEach((currentLine) => {})
 
   //각 선분의 교차점을 찾아 선을 그린다.
   const MAX_ITERATIONS = 1000 //무한루프 방지
@@ -2878,17 +3051,19 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
             if (count === 1) points.push(point)
           })
 
-          const length = Math.sqrt((points[0].x - points[1].x) ** 2 + (points[0].y - points[1].y) ** 2)
-          if (length < EPSILON) return
-          const isDiagonal = Math.abs(points[0].x - points[1].x) >= 1 && Math.abs(points[0].y - points[1].y) >= 1
-          if (isDiagonal) {
-            innerLines.push(
-              drawHipLine([points[0].x, points[0].y, points[1].x, points[1].y], canvas, roof, textMode, null, currentDegree, currentDegree),
-            )
-          } else {
-            innerLines.push(drawRidgeLine([points[0].x, points[0].y, points[1].x, points[1].y], canvas, roof, textMode))
+          if (points.length === 2) {
+            const length = Math.sqrt((points[0].x - points[1].x) ** 2 + (points[0].y - points[1].y) ** 2)
+            if (length < EPSILON) return
+            const isDiagonal = Math.abs(points[0].x - points[1].x) >= 1 && Math.abs(points[0].y - points[1].y) >= 1
+            if (isDiagonal) {
+              innerLines.push(
+                drawHipLine([points[0].x, points[0].y, points[1].x, points[1].y], canvas, roof, textMode, null, currentDegree, currentDegree),
+              )
+            } else {
+              innerLines.push(drawRidgeLine([points[0].x, points[0].y, points[1].x, points[1].y], canvas, roof, textMode))
+            }
+            proceedAnalysis.push(currentLine, partnerLine)
           }
-          proceedAnalysis.push(currentLine, partnerLine)
         }
       })
   })
@@ -2903,6 +3078,106 @@ export const drawRoofByAttribute = (roofId, canvas, textMode) => {
   canvas.renderAll()
 }
 
+/**
+ *
+ * @param testPoint
+ * @param prevLine
+ * @param nextLine
+ * @param baseLines
+ * @param canvas
+ */
+const getRidgeDrivePoints = (testPoint = [], prevLine, nextLine, baseLines, canvas) => {
+  if (prevLine.attributes.type !== LINE_TYPE.WALLLINE.EAVES && nextLine.attributes.type !== LINE_TYPE.WALLLINE.EAVES) return null
+  let prevPoint = null,
+    nextPoint = null
+
+  const baseLinePoints = baseLines.map((line) => ({ x: line.x1, y: line.y1 }))
+  const checkWallPolygon = new QPolygon(baseLinePoints, {})
+  const checkEdge = { vertex1: { x: testPoint[0], y: testPoint[1] }, vertex2: { x: testPoint[2], y: testPoint[3] } }
+
+  if (prevLine.attributes.type === LINE_TYPE.WALLLINE.EAVES) {
+    const index = baseLines.findIndex((line) => line === prevLine)
+    const beforePrevLine = baseLines[(index - 1 + baseLines.length) % baseLines.length]
+    if (!beforePrevLine || beforePrevLine.attributes.type !== LINE_TYPE.WALLLINE.EAVES) {
+      prevPoint = null
+    } else {
+      let prevVector = getHalfAngleVector(beforePrevLine, prevLine)
+
+      const prevCheckPoint = {
+        x: prevLine.x1 + prevVector.x * 10,
+        y: prevLine.y1 + prevVector.y * 10,
+      }
+
+      let prevHipVector
+
+      if (checkWallPolygon.inPolygon(prevCheckPoint)) {
+        prevHipVector = { x: prevVector.x, y: prevVector.y }
+      } else {
+        prevHipVector = { x: -prevVector.x, y: -prevVector.y }
+      }
+
+      const prevHipEdge = {
+        vertex1: { x: prevLine.x1, y: prevLine.y1 },
+        vertex2: { x: prevLine.x1 + prevHipVector.x * 10, y: prevLine.y1 + prevHipVector.y * 10 },
+      }
+
+      const intersection = edgesIntersection(prevHipEdge, checkEdge)
+      if (intersection) {
+        const checkVector = { x: Math.sign(prevLine.x1 - testPoint[0]), y: Math.sign(prevLine.y1 - testPoint[1]) }
+        const intersectVector = { x: Math.sign(prevLine.x1 - intersection.x), y: Math.sign(prevLine.y1 - intersection.y) }
+        if (checkVector.x === intersectVector.x && checkVector.y === intersectVector.y) {
+          const distance = Math.sqrt((intersection.x - testPoint[0]) ** 2 + (intersection.y - testPoint[1]) ** 2)
+          prevPoint = { intersection, distance }
+        }
+      }
+    }
+  }
+
+  if (nextLine.attributes.type === LINE_TYPE.WALLLINE.EAVES) {
+    const index = baseLines.findIndex((line) => line === nextLine)
+    const afterNextLine = baseLines[(index + 1) % baseLines.length]
+    if (!afterNextLine || afterNextLine.attributes.type !== LINE_TYPE.WALLLINE.EAVES) {
+      nextPoint = null
+    } else {
+      let nextVector = getHalfAngleVector(nextLine, afterNextLine)
+      const nextCheckPoint = {
+        x: nextLine.x2 + nextVector.x * 10,
+        y: nextLine.y2 + nextVector.y * 10,
+      }
+      let nextHipVector
+      if (checkWallPolygon.inPolygon(nextCheckPoint)) {
+        nextHipVector = { x: nextVector.x, y: nextVector.y }
+      } else {
+        nextHipVector = { x: -nextVector.x, y: -nextVector.y }
+      }
+
+      const nextHipEdge = {
+        vertex1: { x: nextLine.x2, y: nextLine.y2 },
+        vertex2: { x: nextLine.x2 + nextHipVector.x * 10, y: nextLine.y2 + nextHipVector.y * 10 },
+      }
+      const intersection = edgesIntersection(nextHipEdge, checkEdge)
+      if (intersection) {
+        const checkVector = { x: Math.sign(nextLine.x2 - testPoint[0]), y: Math.sign(nextLine.y2 - testPoint[1]) }
+        const intersectVector = { x: Math.sign(nextLine.x2 - intersection.x), y: Math.sign(nextLine.y2 - intersection.y) }
+        if (checkVector.x === intersectVector.x && checkVector.y === intersectVector.y) {
+          const distance = Math.sqrt((intersection.x - testPoint[0]) ** 2 + (intersection.y - testPoint[1]) ** 2)
+          nextPoint = { intersection, distance }
+        }
+      }
+    }
+  }
+
+  if (prevPoint && nextPoint) {
+    return prevPoint.distance < nextPoint.distance ? prevPoint.intersection : nextPoint.intersection
+  } else if (prevPoint) {
+    return prevPoint.intersection
+  } else if (nextPoint) {
+    return nextPoint.intersection
+  } else {
+    return null
+  }
+}
+
 /**
  *  선분과 선분의 교점을 구한다.
  * @param line1Start