diff --git a/src/hooks/usePolygon.js b/src/hooks/usePolygon.js
index a8942814..3e706b84 100644
--- a/src/hooks/usePolygon.js
+++ b/src/hooks/usePolygon.js
@@ -982,15 +982,15 @@ export const usePolygon = () => {
       /*line.set({ strokeWidth: 5, stroke: 'green' })
       canvas.add(line)
       canvas.renderAll()*/
-      const startPoint = line.startPoint // 시작점
-      let arrivalPoint = line.endPoint // 도착점
+      const startPoint = { ...line.startPoint } // 시작점
+      let arrivalPoint = { ...line.endPoint } // 도착점
 
       let currentPoint = startPoint
-      const roofPoints = [startPoint]
+      let roofPoints = [startPoint]
 
-      const startLine = line
-      const visitPoints = [startPoint]
-      const visitLines = [startLine]
+      let startLine = line
+      let visitPoints = [startPoint]
+      let visitLines = [startLine]
       let notVisitedLines = []
       let cnt = 0
 
@@ -1018,7 +1018,10 @@ export const usePolygon = () => {
           if (notVisitedLines.length === 0) {
             break
           } else {
-            // nextLines = [...notVisitedLines.shift().line]
+            let notVisitedLine = notVisitedLines.shift()
+            roofPoints = [...notVisitedLine.roofPoints]
+            currentPoint = { ...notVisitedLine.currentPoint }
+            continue
           }
         }
 
@@ -1059,6 +1062,7 @@ export const usePolygon = () => {
         currentPoint = { ...minDistancePoint }
         roofPoints.push(currentPoint)
         cnt++
+
         if (cnt > 100) {
           break
         }