feat: initial commit

include/model.h

@@ -0,0 +1,134 @@
+#ifndef MODEL_H_
+#define MODEL_H_
+#include <vector>
+#include <string>
+#include <unordered_map>
+#include <glm/glm.hpp>
+#include <memory>
+
+#include "shader.h"
+#include "texture.h"
+
+enum ObjElement { OHASH, MTLLIB, USEMTL, O, V, VN, VT, F, OUNKNOWN };
+enum MtlElement { MHASH, NEWMTL, NS, KA, KS, KD, NI, D, ILLUM, MAP_KD, MAP_KA, MUNKNOWN };
+
+class Vertex {
+private:
+    glm::vec3 m_position;
+    glm::vec3 m_normal;
+    glm::vec2 m_texCoord;
+public:
+    Vertex(glm::vec3 position, glm::vec3 normal, glm::vec2 texCoord)
+        : m_position(position), m_normal(normal), m_texCoord(texCoord) {}
+public:
+    static void DefineAttrib();
+};
+
+class FaceItem {
+private:
+    unsigned int m_vIndex;
+    unsigned int m_nIndex;
+    unsigned int m_tIndex;
+public:
+    FaceItem()
+        : m_vIndex(0), m_nIndex(0), m_tIndex(0) {}
+    FaceItem(unsigned int vI, unsigned int nI, unsigned int tI)
+        : m_vIndex(vI), m_nIndex(nI), m_tIndex(tI) {}
+public:
+    inline const unsigned int GetVertex() const { return m_vIndex; }
+    inline const unsigned int GetNormal() const { return m_nIndex; }
+    inline const unsigned int GetTex() const { return m_tIndex; }
+public:
+    inline void SetVertex(unsigned int vIndex) { m_vIndex = vIndex; }
+    inline void SetNorm(unsigned int nIndex) { m_nIndex = nIndex; }
+    inline void SetTex(unsigned int tIndex) { m_tIndex = tIndex; }
+};
+
+class Face {
+private:
+    std::vector<FaceItem> m_items;
+public:
+    Face()
+        : m_items(std::vector<FaceItem>()) {}
+public:
+    void PushItem(const FaceItem& item);
+public:
+    inline const unsigned int GetSize() const { return m_items.size(); }
+    inline const FaceItem& GetItem(unsigned int index) const { return m_items[index]; }
+};
+
+class Material {
+private:
+    glm::vec3 m_ambient { 0.2f, 0.2f, 0.2f };
+    glm::vec3 m_diffuse { 0.8f, 0.8f, 0.8f };
+    glm::vec3 m_specular { 1.0f, 1.0f, 1.0f };
+    float m_shininess { 32.0f };
+
+    std::unique_ptr<Texture> m_diffuse_tex { nullptr };
+public:
+    Material() = default;
+    Material(const Material& other) = default; // copy constructor
+    Material& operator=(const Material& other) = default;
+public:
+    inline const glm::vec3 GetAmbientColor() const { return m_ambient; }
+    inline const glm::vec3 GetDiffuseColor() const { return m_diffuse; }
+    inline const glm::vec3 GetSpecularColor() const { return m_specular; }
+    inline const float GetSpecularWeight() const { return m_shininess; }
+    inline const bool HasDiffuseTexture() const { return m_diffuse_tex != nullptr; }
+    inline const Texture* GetDiffuseTexture() const { return m_diffuse_tex.get(); }
+public:
+    inline void SetAmbientColor(glm::vec3 ambient) { m_ambient = ambient; }
+    inline void SetDiffuseColor(glm::vec3 diffuse) { m_diffuse = diffuse; }
+    inline void SetSpecularColor(glm::vec3 specular) { m_specular = specular; }
+    inline void SetSpecularWeight(float weight) { m_shininess = weight; }
+    inline void SetDiffuseTexture(std::unique_ptr<Texture>&& texture) { m_diffuse_tex = std::move(texture); }
+};
+
+class Mesh {
+public: // TODO: abstract away
+    unsigned int m_vao, m_vbo, m_ebo;
+    std::vector<Vertex> m_vertexBuffer;
+    std::vector<unsigned int> m_indexBuffer;
+public: // TODO: abstract away
+    void Bind() { glBindVertexArray(m_vao); }
+    void Unbind() { glBindVertexArray(0); }
+    void Upload();
+public:
+    std::string materialName;
+public:
+    Mesh();
+public:
+    void Render();
+};
+
+class Object {
+private:
+    std::string m_name;
+    std::vector<glm::vec3> m_vertices;
+    std::vector<glm::vec3> m_normals;
+    std::vector<glm::vec2> m_texCoords;
+
+    std::vector<Mesh> m_meshes;
+
+    std::unordered_map<std::string, std::shared_ptr<Material>> m_materials;
+private:
+    static inline int NormalizeIndex(const std::string &s, int baseCount);
+
+private:
+    Object();
+public:
+    static Object LoadFile(const std::string& filename);
+
+private:
+    void LoadMaterials(const std::string& filename);
+private:
+    void AddMaterial(std::string name, std::shared_ptr<Material> material);
+    std::shared_ptr<Material> GetMaterial(std::string name);
+private:
+    Mesh& GetLastMesh();
+    void CreateNewMesh(const std::string& materialName);
+public:
+    void Render(Shader& shader);
+};
+
+#endif // MODEL_H_