File MeshData.h

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#pragma once

#include "VertexArray.h"
#include "buffers/IndexBuffer.h"

#include <iostream>
#include <memory>
#include <numeric>
#include <string>
#include <unordered_map>

#include "glm/glm.hpp"

class MeshData {

public:

    struct ByteArray
    {
        std::vector<float> data_array;
        glm::vec3 center = { 0,0,0 };
        int count[4] = { 0,0,0,0 };

        std::string name = "";
    };

    struct VertexIdx
    {
        int pos, uv, norm, smo_norm;
        void _debug() {
#ifdef _DEBUG
            std::cout << pos << " " << uv << " " << norm << "\n";
#endif
        }
    };

    friend class MeshLib;

private:
    static std::string obj_file_root;
private:

    ByteArray me_read{};
    VertexArray me_vertArry{};
    VertexBuffer me_vertBuffer{};
    IndexBuffer me_index{};

public:

    MeshData();
    void LoadObj(const std::string& path);
    void RenderObjProxy() const;
    void BindVBO(GLuint slot) const;

public:

    glm::vec3 GetMeshCenter() const;
    std::string GetMeshName() const;

};



class MeshLib
{
private:
    using MeshResource = std::shared_ptr<MeshData>;
private:
    static std::unordered_map<std::string, MeshResource> mesh_list;
public:

    MeshLib();
    ~MeshLib();

    static void MeshLibInit();

public:

    static MeshResource LoadMesh(const std::string path);

public:

    static MeshResource Square;

public:

    static void ToGeoCenter(MeshResource _tar);

};