VolumeRenderingStage.hpp

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/*
 *  Copyright (C) 2010 - 2016 Leonid Kostrykin
 *
 *  Chair of Medical Engineering (mediTEC)
 *  RWTH Aachen University
 *  Pauwelsstr. 20
 *  52074 Aachen
 *  Germany
 * 
 * 
 *  Copyright (C) 2021 - 2025 Leonid Kostrykin
 * 
 */
 
#ifndef VOLUMERENDERINGSTAGE_H_6014714286
#define VOLUMERENDERINGSTAGE_H_6014714286
 
#include <LibCarna/base/GeometryStage.hpp>
#include <LibCarna/base/Renderable.hpp>
#include <LibCarna/LibCarna.hpp>
#include <map>
 
namespace LibCarna
{
 
namespace presets
{
 
 
 
// ----------------------------------------------------------------------------------
// VolumeRenderingStage
// ----------------------------------------------------------------------------------
 
class LIBCARNA VolumeRenderingStage : public base::GeometryStage< base::Renderable::BackToFront >
{
 
    struct Details;
    const std::unique_ptr< Details > pimpl;
 
    struct VideoResources;
    std::unique_ptr< VideoResources > vr;
 
public:
 
    const static unsigned int DEFAULT_SAMPLE_RATE = 200;
 
    explicit VolumeRenderingStage( unsigned int geometryType );
 
    virtual ~VolumeRenderingStage();
 
    void setSampleRate( unsigned int sampleRate );
    
    unsigned int sampleRate() const;
 
    virtual void renderPass
        ( const base::math::Matrix4f& viewTransform
        , base::RenderTask& rt
        , const base::Viewport& vp ) override;
 
protected:
 
    virtual unsigned int loadVideoResources();
 
    virtual void render( const base::Renderable& ) override;
 
    virtual void createVolumeSamplers( const std::function< void( unsigned int, base::Sampler* ) >& registerSampler ) = 0;
 
    virtual const base::ShaderProgram& acquireShader() = 0;
 
    virtual const std::string& uniformName( unsigned int role ) const = 0;
 
    virtual void configureShader() = 0;
    
    virtual void configureShader( const base::Renderable& ) = 0;
 
}; // VolumeRenderingStage
 
 
 
}  // namespace LibCarna :: presets
 
}  // namespace LibCarna
 
#endif // VOLUMERENDERINGSTAGE_H_6014714286