voxelcore/src/graphics/core/Mesh.hpp

#pragma once

#include "MeshData.hpp"


struct MeshStats {
    static int meshesCount;
    static int drawCalls;
};

template <typename VertexStructure>
class Mesh {
    unsigned int vao;
    unsigned int vbo;
    unsigned int ibo;
    size_t vertexCount;
    size_t indexCount;
public:
    explicit Mesh(const MeshData<VertexStructure>& data);

    Mesh(
        const VertexStructure* vertexBuffer,
        size_t vertices,
        const uint32_t* indexBuffer,
        size_t indices
    );

    Mesh(const VertexStructure* vertexBuffer, size_t vertices)
        : Mesh<VertexStructure>(vertexBuffer, vertices, nullptr, 0) {};

    ~Mesh();

    /// @brief Update GL vertex and index buffers data without changing VAO
    /// attributes
    /// @param vertexBuffer vertex data buffer
    /// @param vertexCount number of vertices in new buffer
    /// @param indexBuffer indices buffer
    /// @param indexCount number of values in indices buffer
    void reload(
        const VertexStructure* vertexBuffer,
        size_t vertexCount,
        const uint32_t* indexBuffer = nullptr,
        size_t indexCount = 0
    );

    /// @brief Draw mesh with specified primitives type
    /// @param primitive primitives type
    void draw(unsigned int primitive) const;

    /// @brief Draw mesh as triangles
    void draw() const;
};

#include "graphics/core/Mesh.inl"