Adding model loading and bvh generation

src/util/ModelLoader.cpp

@@ -8,22 +8,28 @@
 std::vector<PModel> ModelLoader::loadModel(std::string_view filename)
 {
     Assimp::Importer importer;
-    const aiScene* scene = importer.ReadFile(filename, 0);
+    const aiScene* scene = importer.ReadFile(std::string(filename), aiProcess_Triangulate);
+    std::vector<PModel> result;
     for (int m = 0; m < scene->mNumMeshes; ++m)
     {
-        PModel result = std::make_unique<Model>();
+        PModel model = std::make_unique<Model>();
         const aiMesh* mesh = scene->mMeshes[m];
+        AABB aabb;
         for (int v = 0; v < mesh->mNumVertices; ++v)
         {
             auto aiVert = mesh->mVertices[v];
-            result->positions.add(glm::vec3(aiVert.x, aiVert.y, aiVert.z));
+            model->positions.push_back(glm::vec3(aiVert.x, aiVert.y, aiVert.z));
+            aabb.adjust(model->positions.back());
         }
         for (int i = 0; i < mesh->mNumFaces; ++i)
         {
             auto face = mesh->mFaces[i];
-            result->indices.add(face.mIndices[0]);
-            result->indices.add(face.mIndices[1]);
-            result->indices.add(face.mIndices[2]);
+            model->indices.push_back(face.mIndices[0]);
+            model->indices.push_back(face.mIndices[1]);
+            model->indices.push_back(face.mIndices[2]);
         }
+        model->boundingBox = aabb;
+        result.push_back(std::move(model));
     }
+    return result;
 }