cleanup and refactoring

raytracer/common/obj_loader.h

@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2014-2021 NVIDIA CORPORATION
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+#include <glm/glm.hpp>
+#include "tiny_obj_loader.h"
+#include <array>
+#include <iostream>
+#include <stdint.h>
+#include <unordered_map>
+#include <vector>
+
+// Structure holding the material
+struct MaterialObj
+{
+  glm::vec3 ambient       = glm::vec3(0.1f, 0.1f, 0.1f);
+  glm::vec3 diffuse       = glm::vec3(0.7f, 0.7f, 0.7f);
+  glm::vec3 specular      = glm::vec3(1.0f, 1.0f, 1.0f);
+  glm::vec3 transmittance = glm::vec3(0.0f, 0.0f, 0.0f);
+  glm::vec3 emission      = glm::vec3(0.0f, 0.0f, 0.10);
+  float     shininess     = 0.f;
+  float     ior           = 1.0f;  // index of refraction
+  float     dissolve      = 1.f;   // 1 == opaque; 0 == fully transparent
+                                   // illumination model (see http://www.fileformat.info/format/material/)
+  int illum     = 0;
+  int textureID = -1;
+};
+// OBJ representation of a vertex
+// NOTE: BLAS builder depends on pos being the first member
+struct VertexObj
+{
+  glm::vec3 pos;
+  glm::vec3 nrm;
+  glm::vec3 color;
+  glm::vec2 texCoord;
+};
+
+
+struct shapeObj
+{
+  uint32_t offset;
+  uint32_t nbIndex;
+  uint32_t matIndex;
+};
+
+class ObjLoader
+{
+public:
+  void loadModel(const std::string& filename);
+
+  std::vector<VertexObj>   m_vertices;
+  std::vector<uint32_t>    m_indices;
+  std::vector<MaterialObj> m_materials;
+  std::vector<std::string> m_textures;
+  std::vector<int32_t>     m_matIndx;
+};