path: root/src/RendererSection.hpp

#pragma once

#include <vector>
#include <array>

#include <glm/mat4x4.hpp>
#include <GL/glew.h>

#include "Vector.hpp"
#include "Block.hpp"

class BlockModel;
class AssetManager;
class World;
class RenderState;

struct RendererSectionData {
    std::vector<glm::mat4> models;
    std::vector<glm::vec4> textures;
    std::vector<glm::vec3> colors;
    std::vector<glm::vec2> lights;
    size_t hash;
    Vector sectionPos;

    RendererSectionData(World *world, Vector sectionPosition);
private:

    void AddFacesByBlockModel(const std::vector<Vector> &sectionsList, World *world, Vector blockPos, const BlockModel &model, glm::mat4 transform, unsigned char light, unsigned char skyLight, const std::array<unsigned char, 16 * 16 * 16>& visibility);

    std::array<unsigned char, 16 * 16 * 16> GetBlockVisibilityData(World *world);

    std::vector<std::pair<BlockId, const BlockModel *>> idModels;
    const BlockModel* GetInternalBlockModel(const BlockId& id);

    std::array<BlockId, 4096> blockIdData;
    void SetBlockIdData(World *world);

    inline const BlockId& GetBlockId(const Vector& pos) {
        return blockIdData[pos.y * 256 + pos.z * 16 + pos.x];
    }

    inline const BlockId& GetBlockId(int x, int y, int z) {
        return blockIdData[y * 256 +z * 16 + x];
    }    
};


class RendererSection {
    enum Vbos {
        MODELS = 0,
        TEXTURES,
        COLORS,
        LIGHTS,
        VBOCOUNT,
    };
    GLuint Vao = { 0 };
    GLuint Vbo[VBOCOUNT] = { 0 };
	
	static GLuint VboVertices, VboUvs;

	size_t hash;
    Vector sectionPos;

    RendererSection(const RendererSection &other) = delete;
public:
    RendererSection(RendererSectionData data);

    RendererSection(RendererSection &&other);

	~RendererSection();

	void Render(RenderState &renderState);

    Vector GetPosition();

    size_t GetHash();

    size_t numOfFaces;

    friend void swap(RendererSection &lhs, RendererSection &rhs);
};