ParticlesShader.h

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#pragma once
 
#include <tdme/tdme.h>
#include <tdme/engine/fwd-tdme.h>
#include <tdme/engine/subsystems/particlesystem/fwd-tdme.h>
#include <tdme/engine/subsystems/renderer/fwd-tdme.h>
#include <tdme/math/fwd-tdme.h>
#include <tdme/math/Matrix4x4.h>
#include <tdme/utilities/fwd-tdme.h>
 
using tdme::engine::subsystems::renderer::Renderer;
using tdme::engine::Engine;
using tdme::math::Matrix4x4;
using tdme::utilities::TextureAtlas;
 
/**
 * Particles shader program
 * @author Andreas Drewke
 */
class tdme::engine::subsystems::particlesystem::ParticlesShader final
{
private:
    static constexpr int ATLASTEXTURE_COUNT { 128 };
 
    int32_t programId { -1 };
    int32_t fragmentShaderId { -1 };
    int32_t vertexShaderId { -1 };
    int32_t uniformMVPMatrix { -1 };
    int32_t uniformViewPortWidth { -1 };
    int32_t uniformViewPortHeight { -1 };
    int32_t uniformProjectionMatrixXx { -1 };
    int32_t uniformProjectionMatrixYy { -1 };
    int32_t uniformTextureAtlasTextureUnit { -1 };
    array<int32_t, ATLASTEXTURE_COUNT> uniformAtlasTextureOrientation;
    array<int32_t, ATLASTEXTURE_COUNT> uniformAtlasTexturePosition;
    array<int32_t, ATLASTEXTURE_COUNT> uniformAtlasTextureDimension;
    int32_t ppsTextureAtlasTextureId { 0 };
    Matrix4x4 mvpMatrix;
    bool isRunning;
    bool initialized;
    Engine* engine { nullptr };
    Renderer* renderer { nullptr };
 
public:
    // forbid class copy
    FORBID_CLASS_COPY(ParticlesShader)
 
    /**
     * Public constructor
     * @param engine engine
     * @param renderer renderer
     */
    ParticlesShader(Engine* engine, Renderer* renderer);
 
    /**
     * @return initialized and ready to be used
     */
    bool isInitialized();
 
    /**
     * Initialize renderer
     */
    void initialize();
 
    /**
     * Use lighting program
     * @param contextIdx context index
     */
    void useProgram(int contextIdx);
 
    /**
     * Update effect to program
     * @param contextIdx context index
     */
    void updateEffect(int contextIdx);
 
    /**
     * Unuse particles shader program
     * @param contextIdx context index
     */
    void unUseProgram(int contextIdx);
 
    /**
     * Update matrices to program
     * @param contextIdx context index
     */
    void updateMatrices(int contextIdx);
 
    /**
     * Set texture atlas
     * @param contextIdx context index
     * @param textureAtlas texture atlas
     */
    void setTextureAtlas(int contextIdx, TextureAtlas* textureAtlas);
 
};