OpenSpace/modules/space/rendering/renderablestars.h

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 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2021                                                               *
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#ifndef __OPENSPACE_MODULE_SPACE___RENDERABLESTARS___H__
#define __OPENSPACE_MODULE_SPACE___RENDERABLESTARS___H__

#include <openspace/rendering/renderable.h>

#include <modules/space/speckloader.h>
#include <openspace/properties/stringproperty.h>
#include <openspace/properties/optionproperty.h>
#include <openspace/properties/scalar/floatproperty.h>
#include <openspace/properties/optionproperty.h>
#include <openspace/properties/propertyowner.h>
#include <openspace/properties/vector/vec2property.h>
#include <openspace/properties/vector/vec3property.h>
#include <ghoul/opengl/ghoul_gl.h>
#include <ghoul/opengl/uniformcache.h>
#include <optional>

namespace ghoul::filesystem { class File; }
namespace ghoul::opengl {
    class ProgramObject;
    class Texture;
} // namespace ghoul::opengl

namespace openspace {

namespace documentation { struct Documentation; }

class RenderableStars : public Renderable {
public:
    explicit RenderableStars(const ghoul::Dictionary& dictionary);
    ~RenderableStars();

    void initializeGL() override;
    void deinitializeGL() override;

    bool isReady() const override;

    void loadPSFTexture();
    void renderPSFToTexture();
    void render(const RenderData& data, RendererTasks& rendererTask) override;
    void update(const UpdateData& data) override;

    static documentation::Documentation Documentation();

private:
    enum ColorOption {
        Color = 0,
        Velocity = 1,
        Speed = 2,
        OtherData = 3,
        FixedColor = 4
    };

    void loadData();
    std::vector<float> createDataSlice(ColorOption option);

    properties::StringProperty _speckFile;

    properties::StringProperty _colorTexturePath;
    std::unique_ptr<ghoul::opengl::Texture> _colorTexture;
    std::unique_ptr<ghoul::filesystem::File> _colorTextureFile;

    properties::PropertyOwner _dataMappingContainer;
    struct {
        properties::StringProperty bvColor;
        properties::StringProperty luminance;
        properties::StringProperty absoluteMagnitude;
        properties::StringProperty apparentMagnitude;
        properties::StringProperty vx;
        properties::StringProperty vy;
        properties::StringProperty vz;
        properties::StringProperty speed;
    } _dataMapping;

    properties::OptionProperty _colorOption;
    properties::OptionProperty _otherDataOption;
    properties::StringProperty _otherDataColorMapPath;
    properties::Vec2Property _otherDataRange;
    std::unique_ptr<ghoul::opengl::Texture> _otherDataColorMapTexture;
    properties::Vec3Property _fixedColor;
    properties::BoolProperty _filterOutOfRange;
    properties::StringProperty _pointSpreadFunctionTexturePath;
    std::unique_ptr<ghoul::opengl::Texture> _pointSpreadFunctionTexture;
    std::unique_ptr<ghoul::filesystem::File> _pointSpreadFunctionFile;

    properties::OptionProperty _psfMethodOption;
    properties::OptionProperty _psfMultiplyOption;
    properties::FloatProperty _lumCent;
    properties::FloatProperty _radiusCent;
    properties::FloatProperty _brightnessCent;
    properties::FloatProperty _magnitudeExponent;
    properties::PropertyOwner _spencerPSFParamOwner;
    properties::FloatProperty _p0Param;
    properties::FloatProperty _p1Param;
    properties::FloatProperty _p2Param;
    properties::FloatProperty _spencerAlphaConst;
    properties::PropertyOwner _moffatPSFParamOwner;
    properties::FloatProperty _FWHMConst;
    properties::FloatProperty _moffatBetaConst;
    properties::OptionProperty _renderingMethodOption;
    properties::PropertyOwner _userProvidedTextureOwner;
    properties::PropertyOwner _parametersOwner;
    properties::PropertyOwner _moffatMethodOwner;
    properties::Vec2Property _fadeInDistances;
    properties::BoolProperty _disableFadeInDistance;

    std::unique_ptr<ghoul::opengl::ProgramObject> _program;
    UniformCache(
        modelMatrix, cameraUp, cameraViewProjectionMatrix, colorOption, magnitudeExponent,
        eyePosition, psfParamConf, lumCent, radiusCent, brightnessCent, colorTexture,
        alphaValue, psfTexture, otherDataTexture, otherDataRange, filterOutOfRange,
        fixedColor
    ) _uniformCache;

    bool _speckFileIsDirty = true;
    bool _pointSpreadFunctionTextureIsDirty = true;
    bool _colorTextureIsDirty = true;
    //bool _shapeTextureIsDirty = true;
    bool _dataIsDirty = true;
    bool _otherDataColorMapIsDirty = true;

    speck::Dataset _dataset;

    std::string _queuedOtherData;

    std::optional<float> _staticFilterValue;
    float _staticFilterReplacementValue = 0.f;

    GLuint _vao = 0;
    GLuint _vbo = 0;
    GLuint _psfVao = 0;
    GLuint _psfVbo = 0;
    GLuint _psfTexture = 0;
    GLuint _convolvedTexture = 0;
};

} // namespace openspace

#endif // __OPENSPACE_MODULE_SPACE___RENDERABLESTARS___H__