Mesh.h

// Copyright 2022 ShenMian
// License(Apache-2.0)
 
#pragma once
 
#include <math/math.hpp>
#include <memory>
#include <string>
#include <vector>
 
class IndexBuffer;
class VertexBuffer;
struct Material;
 
class Mesh
{
public:
    struct Vertex
    {
        Vector3 position;
        Vector3 normal;
        Vector2 uv;
        Vector3 tangent;
        Vector3 bitangent;
    };
 
    Mesh(std::string_view name, const std::vector<Vertex>& vertices, const std::vector<unsigned int>& indices,
         Material* mat = nullptr);
 
    std::string               name;
    std::vector<Vertex>       vertices;
    std::vector<unsigned int> indices;
    Material*                 material = nullptr;
 
    uint32_t vertexCount = 0;
    uint32_t indexCount  = 0;
 
    std::shared_ptr<VertexBuffer> vertexBuffer;
    std::shared_ptr<IndexBuffer>  indexBuffer;
 
    float compress();
 
    void decompress();
 
    bool is_compressed() const noexcept;
 
private:
    void optimize();
    void create_buffers();
 
    std::vector<unsigned char> vbuf_;
    std::vector<unsigned char> ibuf_;
};