From c02bda452eb25e953c419c45cd09487998d158b3 Mon Sep 17 00:00:00 2001
From: ysCha <yscha@interplug.co.kr>
Date: Wed, 31 Dec 2025 15:38:51 +0900
Subject: [PATCH] =?UTF-8?q?=ED=95=A0=EB=8B=B9=EC=B2=98=EB=A6=AC?=
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---
 .../roofcover/useRoofAllocationSetting.js     | 58 ++++++++++++++++---
 1 file changed, 49 insertions(+), 9 deletions(-)

diff --git a/src/hooks/roofcover/useRoofAllocationSetting.js b/src/hooks/roofcover/useRoofAllocationSetting.js
index 4bb3d8ca..3ef5aa97 100644
--- a/src/hooks/roofcover/useRoofAllocationSetting.js
+++ b/src/hooks/roofcover/useRoofAllocationSetting.js
@@ -475,17 +475,57 @@ export function useRoofAllocationSetting(id) {
             const existingEaveLineIds = new Set(roofBase.lines.map((line) => line.id))
             const newEaveLines = roofEaveHelpLines.filter((line) => !existingEaveLineIds.has(line.id))
             // Filter out lines from roofBase.lines that share any points with newEaveLines
+            // ... existing code ...
+            // ... existing code ...
             const linesToKeep = roofBase.lines.filter(roofLine => {
-              return !newEaveLines.some(eaveLine => {
-                // Check if any endpoint of roofLine matches any endpoint of eaveLine
-                return (
-                  // Check if any endpoint of roofLine matches any endpoint of eaveLine
-                  (Math.abs(roofLine.x1 - eaveLine.x1) < 0.1 && Math.abs(roofLine.y1 - eaveLine.y1) < 0.1) || // p1 matches p1
-                  (Math.abs(roofLine.x2 - eaveLine.x2) < 0.1 && Math.abs(roofLine.y2 - eaveLine.y2) < 0.1)    // p2 matches p2
-                );
-              });
-            });
+              const shouldRemove = newEaveLines.some(eaveLine => {
+                // 1. 기본적인 포인트 일치 확인
+                const rX1 = roofLine.x1, rY1 = roofLine.y1, rX2 = roofLine.x2, rY2 = roofLine.y2;
+                const eX1 = eaveLine.x1, eY1 = eaveLine.y1, eX2 = eaveLine.x2, eY2 = eaveLine.y2;
 
+                const isP1Matched = (Math.abs(rX1 - eX1) < 0.1 && Math.abs(rY1 - eY1) < 0.1) || (Math.abs(rX1 - eX2) < 0.1 && Math.abs(rY1 - eY2) < 0.1);
+                const isP2Matched = (Math.abs(rX2 - eX1) < 0.1 && Math.abs(rY2 - eY1) < 0.1) || (Math.abs(rX2 - eX2) < 0.1 && Math.abs(rY2 - eY2) < 0.1);
+
+                if (isP1Matched || isP2Matched) {
+                  // 2. 일직선(평행)인지 확인
+                  const dx1 = rX2 - rX1;
+                  const dy1 = rY2 - rY1;
+                  const dx2 = eX2 - eX1;
+                  const dy2 = eY2 - eY1;
+                  const crossProduct = Math.abs(dx1 * dy2 - dy1 * dx2);
+                  const mag1 = Math.sqrt(dx1 * dx1 + dy1 * dy1);
+                  const mag2 = Math.sqrt(dx2 * dx2 + dy2 * dy2);
+                  const isStraight = (mag1 * mag2) === 0 ? true : (crossProduct / (mag1 * mag2) < 0.01);
+
+                  if (isStraight) {
+                    // 3. [핵심] 몸통이 포개지는지(Overlap) 확인
+                    // 한 선의 끝점이 다른 선의 "내부"에 들어와 있는지 체크
+                    const isPointInside = (x, y, x1, y1, x2, y2) => {
+                      const dotProduct = (x - x1) * (x2 - x1) + (y - y1) * (y2 - y1);
+                      if (dotProduct < 0.1) return false; // 시작점 바깥쪽
+                      const squaredLength = (x2 - x1) ** 2 + (y2 - y1) ** 2;
+                      if (dotProduct > squaredLength - 0.1) return false; // 끝점 바깥쪽
+                      return true; // 선의 내부(몸통)에 있음
+                    };
+
+                    // roofLine의 끝점 중 하나가 eaveLine의 몸통 안에 있거나,
+                    // eaveLine의 끝점 중 하나가 roofLine의 몸통 안에 있으면 "포개짐"으로 판단
+                    const isOverlapping =
+                      isPointInside(rX1, rY1, eX1, eY1, eX2, eY2) ||
+                      isPointInside(rX2, rY2, eX1, eY1, eX2, eY2) ||
+                      isPointInside(eX1, eY1, rX1, rY1, rX2, rY2) ||
+                      isPointInside(eX2, eY2, rX1, rY1, rX2, rY2);
+
+                    if (isOverlapping) {
+                      console.log('Removing overlapping line:', roofLine);
+                      return true; // 포개지는 경우에만 삭제
+                    }
+                  }
+                }
+                return false; // 끝점만 닿아 있거나 직각인 경우는 살림
+              });
+              return !shouldRemove;
+            });
 // Combine remaining lines with newEaveLines
             roofBase.lines = [...linesToKeep, ...newEaveLines];
           } else {