diff --git a/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.cpp b/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.cpp
index f69c3f0..e5760d6 100644
--- a/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.cpp
+++ b/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.cpp
@@ -4,8 +4,8 @@ GLuint BvhTree::getBvhNodeNum() {
 	return tot;
 }
 
-void BvhTree::buildBvhTree(BvhTreeData initBound[], int len) {
-	tot = 0;
+void BvhTree::buildBvhTree(BvhTreeData initBound[], int len, GLuint transformParam) {
+	tot = 0; transform = transformParam;
 	root = subBvhTree(initBound, 0, len-1);
 }
 
@@ -19,9 +19,9 @@ QVector4D BvhTree::Union(QVector4D a, QVector4D b) {
 }
 
 QVector4D BvhTree::calcBound(BvhTreeData initBound[], int l, int r) {
-	QVector4D res = initBound[l].bound;
+	QVector4D res = initBound[l].boundWithRotation();
 	for (int i = l + 1; i <= r; i++) {
-		res = Union(res, initBound[i].bound);
+		res = Union(res, initBound[i].boundWithRotation());
 	}
 	return res;
 }
@@ -30,7 +30,7 @@ BvhPtr BvhTree::subBvhTree(BvhTreeData initBound[], int l, int r) {
 	if (l > r) return NULL;
 	BvhPtr p(new BvhNode());
 	p->lab = tot++;
-	p->bound = calcBound(initBound, l, r);
+	//p->bound = calcBound(initBound, l, r);
 	if (l == r) {
 		p->isLeaf = true;
 		BvhPtr lp(new BvhNode());
@@ -39,6 +39,7 @@ BvhPtr BvhTree::subBvhTree(BvhTreeData initBound[], int l, int r) {
 		BvhPtr rp(new BvhNode());
 		rp->lab = initBound[r].rightSon;
 		p->child[1] = rp;
+		p->bound = calcBound(initBound, l, r);
 		return p;
 	}
 	int dim = p->maximumBound();
@@ -50,6 +51,7 @@ BvhPtr BvhTree::subBvhTree(BvhTreeData initBound[], int l, int r) {
 	int mid = (l + r) >> 1;
 	p->child[0] = subBvhTree(initBound, l, mid);
 	p->child[1] = subBvhTree(initBound, mid+1, r);
+	p->bound = Union(p->child[0]->bound, p->child[1]->bound);
 	return p;
 }
 
diff --git a/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.h b/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.h
index 0dfc795..2748327 100644
--- a/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.h
+++ b/ArchitectureColoredPainting/src/Renderer/Painting/BvhTree.h
@@ -20,6 +20,17 @@ namespace Renderer
 				bound.x(), bound.y(), bound.z(), bound.w(),
 				leftSon, rightSon);
 		}
+		QVector4D boundWithRotation() {
+			double angle = (rightSon & ((1 << 16) - 1)) * acos(-1);
+			double px = bound.x() * cos(angle) + bound.y() * sin(angle), py = bound.y() * cos(angle) - bound.x() * sin(angle);
+			double qx = bound.z() * cos(angle) + bound.w() * sin(angle), qy = bound.w() * cos(angle) - bound.z() * sin(angle);
+			return QVector4D(
+				std::min(px, qx),
+				std::min(py, qy),
+				std::max(px, qx),
+				std::max(py, qy)
+			);
+		}
 		BvhTreeData(QVector4D bound, GLuint leftSon, GLuint rightSon)
 			: bound(bound), leftSon(leftSon), rightSon(rightSon) {}
 		BvhTreeData()
@@ -67,7 +78,7 @@ namespace Renderer
 	{
 
 	private:
-		GLuint tot;
+		GLuint tot, transform;
 		BvhPtr root;
 		static QVector4D calcBound(BvhTreeData initBound[], int l, int r);
 		static QVector4D Union(QVector4D a, QVector4D b);
@@ -79,7 +90,7 @@ namespace Renderer
 			root = NULL;
 		}
 		// 根据底层包围盒生成bvh树
-		void buildBvhTree(BvhTreeData initBound[], int len);
+		void buildBvhTree(BvhTreeData initBound[], int len, GLuint transformParam = 0);
 		// 获得 Bvh （rootBvh部分）的 children 数组，包围盒数组 vector 传输
 		void getBvhArray(std::vector<GLuint>& children, std::vector<QVector4D>& bounds);
 		// 获得 BvhTree 中节点总数
diff --git a/ArchitectureColoredPainting/src/Renderer/Painting/Painting.cpp b/ArchitectureColoredPainting/src/Renderer/Painting/Painting.cpp
index 9655bb8..e78a81a 100644
--- a/ArchitectureColoredPainting/src/Renderer/Painting/Painting.cpp
+++ b/ArchitectureColoredPainting/src/Renderer/Painting/Painting.cpp
@@ -100,7 +100,7 @@ GLuint encodeZIndexRotation(GLuint zIndex, float rotation)
 BvhTreeData Painting::encodeElementLeaf(ElementWithTransform e)
 {
 	QVector4D bound(e.transform.bound.x, e.transform.bound.y, e.transform.bound.z, e.transform.bound.w);
-	GLuint rightSon = GLuint(glm::mod(e.transform.rotation, 360.f) * (1 << 16))
+	GLuint rightSon = GLuint(glm::mod(e.transform.rotation, 360.f)/360.f * (1 << 16))
 		+ (e.transform.flip.x << 16) + (e.transform.flip.y << 17) + (e.transform.zIndex << 18);
 	return BvhTreeData(bound, elementPool[e.element], rightSon);
 }