From d4cca0a54d1c5f5a8c261c92e8536100e2514214 Mon Sep 17 00:00:00 2001
From: "hyojun.choi" <chlgkwk123@nate.com>
Date: Mon, 9 Mar 2026 10:26:03 +0900
Subject: [PATCH] =?UTF-8?q?#1525=20=EB=A9=B4=ED=98=95=EC=83=81=20=EB=B0=B0?=
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---
 src/hooks/surface/useSurfaceShapeBatch.js | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/hooks/surface/useSurfaceShapeBatch.js b/src/hooks/surface/useSurfaceShapeBatch.js
index d7df9b6d..27a6f737 100644
--- a/src/hooks/surface/useSurfaceShapeBatch.js
+++ b/src/hooks/surface/useSurfaceShapeBatch.js
@@ -208,6 +208,13 @@ export function useSurfaceShapeBatch({ isHidden, setIsHidden }) {
           isXInversion: xInversion,
           isYInversion: yInversion,
         })
+        // 최초 생성 시 planeSize를 계산된 길이로 저장 (회전 후 좌표 반올림에 의한 오차 방지)
+        batchSurface.lines.forEach((line) => {
+          if (!line.attributes.planeSize || line.attributes.planeSize === 0) {
+            line.attributes.planeSize = line.getLength()
+          }
+        })
+
         canvas.setActiveObject(batchSurface)
         setSurfaceShapePattern(batchSurface, roofDisplay.column)
         drawDirectionArrow(batchSurface)
@@ -375,9 +382,9 @@ export function useSurfaceShapeBatch({ isHidden, setIsHidden }) {
         }
 
         points = [
-          { x: pointer.x, y: pointer.y - parseInt(newLength2) / 2 },
-          { x: pointer.x - parseInt(length1) / 2, y: pointer.y + parseInt(newLength2) / 2 },
-          { x: pointer.x + parseInt(length1) / 2, y: pointer.y + parseInt(newLength2) / 2 },
+          { x: pointer.x, y: pointer.y - newLength2 / 2 },
+          { x: pointer.x - length1 / 2, y: pointer.y + newLength2 / 2 },
+          { x: pointer.x + length1 / 2, y: pointer.y + newLength2 / 2 },
         ]
 
         break