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#ifndef MESH_INCLUDED_H
#define MESH_INCLUDED_H
#include <GL/glew.h>
#include <array>
#include <cstddef>
#include <filesystem>
#include <gfx/models/vertex.hpp>
#include <span>
#include <special_members.hpp>
#include <utility>
#include <vector>
class ObjParser;
enum MeshBufferPositions { POSITION_VB, TEXCOORD_VB, NORMAL_VB, INDEX_VB };
class Mesh {
public:
using Data = std::pair<std::vector<Vertex>, std::vector<unsigned int>>;
explicit Mesh(const std::filesystem::path & fileName);
explicit Mesh(const ObjParser & obj);
Mesh(std::span<Vertex> vertices, std::span<unsigned int> indices, GLenum = GL_TRIANGLES);
virtual ~Mesh();
NO_COPY(Mesh);
NO_MOVE(Mesh);
void Draw() const;
private:
explicit Mesh(Data && vandi, GLenum = GL_TRIANGLES);
static Data packObjParser(const ObjParser &);
static constexpr unsigned int NUM_BUFFERS {4};
GLuint m_vertexArrayObject;
std::array<GLuint, NUM_BUFFERS> m_vertexArrayBuffers;
size_t m_numIndices;
GLenum mode;
};
#endif
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