diff --git a/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.cpp b/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.cpp
index e5760d6..3de220a 100644
--- a/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.cpp
+++ b/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.cpp
@@ -6,6 +6,9 @@ GLuint BvhTree::getBvhNodeNum() {
 
 void BvhTree::buildBvhTree(BvhTreeData initBound[], int len, GLuint transformParam) {
 	tot = 0; transform = transformParam;
+	for (int i = 0; i < len; i++) {
+		initBound->bound = initBound->boundWithRotation();
+	}
 	root = subBvhTree(initBound, 0, len-1);
 }
 
@@ -19,9 +22,9 @@ QVector4D BvhTree::Union(QVector4D a, QVector4D b) {
 }
 
 QVector4D BvhTree::calcBound(BvhTreeData initBound[], int l, int r) {
-	QVector4D res = initBound[l].boundWithRotation();
+	QVector4D res = initBound[l].bound;
 	for (int i = l + 1; i <= r; i++) {
-		res = Union(res, initBound[i].boundWithRotation());
+		res = Union(res, initBound[i].bound);
 	}
 	return res;
 }