GasGiantMaterial.h

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// Copyright © 2008-2021 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#ifndef _OGL_GASGIANTMATERIAL_H
#define _OGL_GASGIANTMATERIAL_H
/*
 * Programs & Materials used by terrain
 */
#include "MaterialGL.h"
#include "OpenGLLibs.h"
#include "Program.h"
 
namespace Graphics {
    namespace OGL {
        class GasGiantProgram : public Program {
        public:
            GasGiantProgram(const std::string &filename, const std::string &defines);
 
            Uniform atmosColor;
            Uniform geosphereAtmosFogDensity;
            Uniform geosphereAtmosInvScaleHeight;
            Uniform geosphereAtmosTopRad; // in planet radii
            Uniform geosphereCenter;
            Uniform geosphereRadius; // planet radius
            Uniform geosphereInvRadius; // 1.0 / (planet radius)
 
            Uniform shadowCentreX;
            Uniform shadowCentreY;
            Uniform shadowCentreZ;
            Uniform srad;
            Uniform lrad;
            Uniform sdivlrad;
 
        protected:
            virtual void InitUniforms();
        };
 
        class GasGiantSurfaceMaterial : public Material {
        public:
            GasGiantSurfaceMaterial();
            virtual Program *CreateProgram(const MaterialDescriptor &) override;
            virtual void SetProgram(Program *p) override;
            virtual void Apply() override;
 
        protected:
            void SetGSUniforms();
            // We actually have multiple programs at work here, one compiled for each of the number of shadows.
            // They are chosen/created based on what the current parameters passed in by the specialParameter0 are.
            void SwitchShadowVariant();
            Program *m_programs[4]; // 0 to 3 shadows
            Uint32 m_curNumShadows;
        };
    } // namespace OGL
} // namespace Graphics
#endif