mirror of
https://github.com/OpenSpace/OpenSpace.git
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222 lines
8.6 KiB
C++
222 lines
8.6 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2016 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#ifndef __RENDERABLEPLANET_H__
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#define __RENDERABLEPLANET_H__
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// open space includes
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#include <openspace/rendering/renderable.h>
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#include <openspace/properties/stringproperty.h>
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#include <openspace/util/updatestructures.h>
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#include <ghoul/opengl/textureunit.h>
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#include <vector>
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#include <string>
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// ghoul includes
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namespace ghoul {
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namespace opengl {
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class ProgramObject;
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class Texture;
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}
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}
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namespace openspace {
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namespace planetgeometry {
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class PlanetGeometry;
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}
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class RenderablePlanet : public Renderable {
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public:
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// Shadow structure
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typedef struct {
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std::pair<std::string, float> source;
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std::pair<std::string, float> caster;
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} ShadowConf;
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struct ShadowRenderingStruct {
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float xu, xp;
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float rs, rc;
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glm::vec3 sourceCasterVec;
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glm::vec3 casterPositionVec;
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bool isShadowing;
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};
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// See: Precomputed Atmospheric Scattering from Bruneton et al.
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// for explanation of the following parameters.
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const unsigned int TRANSMITTANCE_TABLE_WIDTH = 256;
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const unsigned int TRANSMITTANCE_TABLE_HEIGHT = 64;
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const unsigned int IRRADIANCE_TABLE_WIDTH = 64;
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const unsigned int IRRADIANCE_TABLE_HEIGHT = 16;
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const unsigned int DELTA_E_TABLE_WIDTH = 64;
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const unsigned int DELTA_E_TABLE_HEIGHT = 16;
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/*const unsigned int TRANSMITTANCE_TABLE_WIDTH = 512;
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const unsigned int TRANSMITTANCE_TABLE_HEIGHT = 128;
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const unsigned int IRRADIANCE_TABLE_WIDTH = 128;
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const unsigned int IRRADIANCE_TABLE_HEIGHT = 32;
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const unsigned int DELTA_E_TABLE_WIDTH = 128;
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const unsigned int DELTA_E_TABLE_HEIGHT = 32;*/
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const unsigned int R_SAMPLES = 32;
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const unsigned int MU_SAMPLES = 128;
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const unsigned int MU_S_SAMPLES = 32;
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const unsigned int NU_SAMPLES = 8;
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/*const unsigned int R_SAMPLES = 64;
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const unsigned int MU_SAMPLES = 256;
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const unsigned int MU_S_SAMPLES = 64;
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const unsigned int NU_SAMPLES = 16;*/
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public:
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explicit RenderablePlanet(const ghoul::Dictionary& dictionary);
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~RenderablePlanet();
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bool initialize() override;
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bool deinitialize() override;
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bool isReady() const override;
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void render(const RenderData& data) override;
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void update(const UpdateData& data) override;
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protected:
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void loadTexture();
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private:
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void loadComputationPrograms();
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void unloadComputationPrograms();
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void createComputationTextures();
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void deleteComputationTextures();
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void deleteUnusedComputationTextures();
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void loadAtmosphereDataIntoShaderProgram(std::unique_ptr<ghoul::opengl::ProgramObject> & shaderProg);
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void executeCalculations(const GLuint vao, const GLenum drawBuffers[2], const GLsizei vertexSize);
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void preCalculateAtmosphereParam();
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void createAtmosphereFBO();
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void createRenderQuad(GLuint * vao, GLuint * vbo, const GLfloat size);
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void renderQuadForCalc(const GLuint vao, const GLsizei size);
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void step3DTexture(std::unique_ptr<ghoul::opengl::ProgramObject> & shaderProg,
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const int layer, const bool doCalc = true);
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void saveTextureToPPMFile(const GLenum color_buffer_attachment, const std::string & fileName,
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const int width, const int height) const;
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private:
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properties::StringProperty _colorTexturePath;
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properties::StringProperty _nightTexturePath;
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properties::StringProperty _heightMapTexturePath;
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properties::StringProperty _cloudsTexturePath;
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properties::StringProperty _reflectanceTexturePath;
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std::unique_ptr<ghoul::opengl::ProgramObject> _programObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _transmittanceProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _irradianceProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _irradianceSupTermsProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _inScatteringProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _inScatteringSupTermsProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _deltaEProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _deltaSProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _deltaSSupTermsProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _deltaJProgramObject;
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std::unique_ptr<ghoul::opengl::ProgramObject> _atmosphereProgramObject;
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ghoul::opengl::TextureUnit _dummyTextureUnit;
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ghoul::opengl::TextureUnit _dummy3DTextureUnit;
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ghoul::opengl::TextureUnit _transmittanceTableTextureUnit;
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ghoul::opengl::TextureUnit _irradianceTableTextureUnit;
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ghoul::opengl::TextureUnit _inScatteringTableTextureUnit;
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ghoul::opengl::TextureUnit _deltaETableTextureUnit;
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ghoul::opengl::TextureUnit _deltaSRayleighTableTextureUnit;
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ghoul::opengl::TextureUnit _deltaSMieTableTextureUnit;
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ghoul::opengl::TextureUnit _deltaJTableTextureUnit;
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ghoul::opengl::TextureUnit _atmosphereTextureUnit;
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std::unique_ptr<ghoul::opengl::Texture> _texture;
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std::unique_ptr<ghoul::opengl::Texture> _nightTexture;
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std::unique_ptr<ghoul::opengl::Texture> _reflectanceTexture;
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std::unique_ptr<ghoul::opengl::Texture> _heightMapTexture;
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std::unique_ptr<ghoul::opengl::Texture> _cloudsTexture;
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GLuint _transmittanceTableTexture;
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GLuint _irradianceTableTexture;
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GLuint _inScatteringTableTexture;
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GLuint _deltaETableTexture;
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GLuint _deltaSRayleighTableTexture;
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GLuint _deltaSMieTableTexture;
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GLuint _deltaJTableTexture;
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GLuint _dummyTexture;
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GLuint _dummy3DTexture;
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GLuint _atmosphereTexture;
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GLuint _atmosphereFBO;
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GLuint _atmosphereRenderVAO;
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GLuint _atmosphereRenderVBO;
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properties::FloatProperty _heightExaggeration;
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planetgeometry::PlanetGeometry* _geometry;
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properties::BoolProperty _performShading;
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properties::IntProperty _rotation;
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float _alpha;
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std::vector< ShadowConf > _shadowConfArray;
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float _planetRadius;
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glm::dmat3 _stateMatrix;
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std::string _frame;
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std::string _target;
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bool _hasNightTexture;
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bool _hasReflectanceTexture;
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bool _hasHeightTexture;
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bool _hasCloudsTexture;
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bool _shadowEnabled;
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double _time;
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// Atmosphere Data
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bool _atmosphereCalculated;
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bool _atmosphereEnabled;
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float _atmosphereRadius;
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float _atmospherePlanetRadius;
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float _planetAverageGroundReflectance;
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float _rayleighHeightScale;
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float _mieHeightScale;
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float _miePhaseConstant;
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glm::vec3 _mieExtinctionCoeff;
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glm::vec3 _rayleighScatteringCoeff;
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glm::vec3 _mieScatteringCoeff;
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bool tempPic;
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unsigned int count;
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};
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} // namespace openspace
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#endif // __RENDERABLEPLANET_H__
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