Merge pull request '修复 RotateAndMove 平移项缺失旋转分量导致落点错位' (#64) from home-lenovo-legion-r9000/fix-gidraw-rotatemove into main

Reviewed-on: #64
Reviewed-by: gjm <littleoldpan@163.com>

SourceCode/Code2026/AecRxBase/GiDrawUtility.cpp

@@ -183,7 +183,11 @@ AECDLLIMPEXP AcGeMatrix3d GiDrawUtility::RotateAndMove(const AcGeVector3d &vtOri
 	AcGeMatrix3d mat(AcGeMatrix3d::kIdentity);
 	//mat = _vtDist.rotateTo(_vtOrig);
 	mat = _vtOrig.rotateTo(_vtDist);
-	mat.setTranslation(ptDist - ptOrig);
+	// 平移量须为 ptDist - R*ptOrig：先求旋转后的 ptOrig 落点，再算差值。
+	// 原来写成 ptDist - ptOrig，仅在 ptOrig 位于旋转轴上（含原点）时才正确。
+	AcGePoint3d ptTmp(ptOrig);
+	ptTmp.transformBy(mat);
+	mat.setTranslation(ptDist - ptTmp);
 	return mat;
 }