diff --git a/FinalProject/model.cpp b/FinalProject/model.cpp
index 3f3ee94..e1db286 100644
--- a/FinalProject/model.cpp
+++ b/FinalProject/model.cpp
@@ -35,7 +35,7 @@ void Model::loadModel(std::string path) {
     _status = LOADED;
     Logger::info("Model loaded");
     // 仅检查一次即可
-    check_boundary();
+    //check_boundary();
 }
 
 void Model::processNode(aiNode* node, const aiScene* scene) {
@@ -67,16 +67,16 @@ Mesh Model::processMesh(aiMesh* mesh, const aiScene* scene) {
         glm::vec3 vertexBitangent = glm::vec3(0.0f);
         
         // Process vertex positions
-        // 使用循环避免代码重复，如果可行的话，可以在此循环中确定法向量等信息
-        //for (int j = 0; j < 3; j++) {
-        //    vertexPosition[j] = mesh->mVertices[i][j];
-        //    _left_down_back[j] = _left_down_back[j] < vertexPosition[j] ? _left_down_back[j] : vertexPosition[j];
-        //    _right_up_front[j] = _right_up_front[j] > vertexPosition[j] ? _right_up_front[j] : vertexPosition[j];
-        //}
+        //使用循环避免代码重复，如果可行的话，可以在此循环中确定法向量等信息
+        for (int j = 0; j < 3; j++) {
+            vertexPosition[j] = mesh->mVertices[i][j];
+            _left_down_back[j] = _left_down_back[j] < vertexPosition[j] ? _left_down_back[j] : vertexPosition[j];
+            _right_up_front[j] = _right_up_front[j] > vertexPosition[j] ? _right_up_front[j] : vertexPosition[j];
+        }
 
-        vertexPosition.x = mesh->mVertices[i].x;
-        vertexPosition.y = mesh->mVertices[i].y;
-        vertexPosition.z = mesh->mVertices[i].z;
+        //vertexPosition.x = mesh->mVertices[i].x;
+        //vertexPosition.y = mesh->mVertices[i].y;
+        //vertexPosition.z = mesh->mVertices[i].z;
 
         // Process vertex normals
         if (mesh->mNormals) {
diff --git a/FinalProject/renderable.cpp b/FinalProject/renderable.cpp
index a022be4..11e1459 100644
--- a/FinalProject/renderable.cpp
+++ b/FinalProject/renderable.cpp
@@ -4,15 +4,9 @@
 
 // 极值点一定在model包围盒的顶点出取到
 
-Renderable::Renderable(Model* model) : _model(model) {
-    _upper_bound = model->get_upper_bound();
-    _lower_bound = model->get_lower_bound();
-}
+Renderable::Renderable(Model* model) : _model(model) {}
 
-Renderable::Renderable(Model* model, glm::vec3 position) : _model(model), _position(position) {
-    _upper_bound = model->get_upper_bound();
-    _lower_bound = model->get_lower_bound();
-}
+Renderable::Renderable(Model* model, glm::vec3 position) : _model(model), _position(position) {}
 
 void Renderable::move(glm::vec3 deltaVec) {
     _position += deltaVec;
@@ -47,5 +41,18 @@ void Renderable::render(ShaderProgram shader) {
 
 // check here to get global boundary
 void Renderable::check_boundary() {
-
+    std::vector<glm::vec3> temp = { _lower_bound,_upper_bound };
+    _lower_bound = glm::vec3(3e36, 3e36, 3e36);
+    _upper_bound = -_lower_bound;
+    auto model = this->modelMatrix();// 变换矩阵
+    // 位运算 从000到111的每一种组合
+    for (int i = 0; i < 7; i++) {
+        //遍历每一个顶点
+        glm::vec4 vex = glm::vec4(temp[i & 4][0], temp[i & 2][1], temp[i & 1][2],1.0f);
+        vex = model * vex; // 经过变化之后的点的坐标
+        for (int j = 0; j < 3; j++) {
+            _lower_bound[j] = _lower_bound[j] < vex[j] ? _lower_bound[j] : vex[j];
+            _upper_bound[j] = _upper_bound[j] > vex[j] ? _upper_bound[j] : vex[j];
+        }
+    }
 }
\ No newline at end of file