VolumeRender.h

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//
// class to render a 3D volume
//
// Author: Simon Green
// Email: sdkfeedback@nvidia.com
//
// Copyright (c) NVIDIA Corporation. All rights reserved.

#ifndef _VOLUME_RENDER_H
#define _VOLUME_RENDER_H

#include <Cg/cgGL.h>
#include "VolumeBuffer.h"

// class to render a 3D volume
class VolumeRender  {
public:
        //VolumeRender();
    VolumeRender(CGcontext cg_context, VolumeBuffer *volume);
    ~VolumeRender();

    void render();
        void renderSlice(int sn);
        void loaddata();

    void setVolume(VolumeBuffer *volume) { m_volume = volume; }


        //void setTransferFunction()

        /*
    void setDensity(float x) { m_density = x; }
    void setBrightness(float x) { m_brightness = x; }
        */

        //transfer function texture
        GLuint m_tfid;

        //multi-scale transfer functions
        GLuint m_tfid_s1;
        GLuint m_tfid_s2;
        GLuint m_tfid_s3;


private:
    void loadPrograms();

    VolumeBuffer *m_volume;

        /*
        CGcontext m_cg_context;

    CGprofile m_cg_vprofile, m_cg_fprofile;

    CGprogram m_raymarch_vprog, m_raymarch_fprog;
    CGparameter m_density_param, m_brightness_param;


    float m_density, m_brightness;
        */
        
        CGcontext m_cg_context;

    //CGprofile m_cg_vprofile, m_cg_fprofile;
        CGprofile m_cg_fprofile;

    //CGprogram m_raymarch_vprog, m_raymarch_fprog;
        //CGparameter m_density_param, m_brightness_param;

        CGprogram m_raymarch_fprog;

        CGparameter     volume_texture, transfer_function;                                                                                      // The Parameters Needed For Program

        CGparameter     volume_texture_s1, volume_texture_s2, volume_texture_s3;
        CGparameter     transfer_function_s1, transfer_function_s2, transfer_function_s3;


    float m_density, m_brightness;

};

#endif

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