VolumeCellTraversal.h

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#pragma once
 
#include <vapor/VolumeRegular.h>
 
namespace VAPoR {
 
 
class VolumeCellTraversal : public VolumeRegular {
public:
    VolumeCellTraversal(GLManager *gl, VolumeRenderer *renderer);
    ~VolumeCellTraversal();
 
    static std::string GetName() { return "Curvilinear"; }
    static Type        GetType() { return Type::DVR; }
    virtual bool       RequiresChunkedRendering() { return true; }
 
    virtual int            LoadData(const Grid *grid);
    virtual ShaderProgram *GetShader() const;
    virtual void           SetUniforms(const ShaderProgram *shader) const;
    virtual float          GuestimateFastModeSpeedupFactor() const;
    virtual int CheckHardwareSupport(const Grid *grid) const;
 
private:
    Texture3D      _coordTexture;
    Texture2DArray _minTexture;
    Texture2DArray _maxTexture;
    Texture2D      _BBLevelDimTexture;
 
    int  _coordDims[3];
    int  _BBLevels;
    bool _useHighPrecisionTriangleRoutine;
    bool _gridHasInvertedCoordinateSystemHandiness;
 
    bool        _needsHighPrecisionTriangleRoutine(const Grid *grid);
    static bool _need32BitForCoordinates(const Grid *grid);
 
protected:
    int                 _getHeuristicBBLevels() const;
    virtual std::string _addDefinitionsToShader(std::string shaderName) const;
};
 
 
class VolumeCellTraversalIso : public VolumeCellTraversal {
public:
    VolumeCellTraversalIso(GLManager *gl, VolumeRenderer *renderer) : VolumeCellTraversal(gl, renderer) {}
    static std::string     GetName() { return "Iso Curvilinear"; }
    static Type            GetType() { return Type::Iso; }
    virtual ShaderProgram *GetShader() const;
    virtual void           SetUniforms(const ShaderProgram *shader) const;
};
 
}    // namespace VAPoR