source: GTP/trunk/Lib/Vis/Preprocessing/src/QtInterface/GlobalLinesRenderer.cpp @ 1940

#include "glInterface.h"
#include "GlobalLinesRenderer.h"
#include "common.h"

#include <Cg/cg.h>
#include <Cg/cgGL.h>

#include <QtOpenGL>

namespace GtpVisibilityPreprocessor {

static CGcontext sCgContext = NULL;
static CGprogram sCgDepthPeelingProgram = NULL;
static CGprofile sCgFragmentProfile;


static void handleCgError() 
{
    cerr << "Cg error: " << cgGetErrorString(cgGetError()) << endl;
    exit(1);
}


GlobalLinesRenderer::GlobalLinesRenderer(QGLPixelBuffer *buffer1, QGLPixelBuffer *buffer2):
mNewBuffer(buffer1), mOldBuffer(buffer2)
{
}


GlobalLinesRenderer::~GlobalLinesRenderer()
{
        if (sCgDepthPeelingProgram)
                cgDestroyProgram(sCgDepthPeelingProgram);
        if (sCgContext)
                cgDestroyContext(sCgContext);
}

 
void GlobalLinesRenderer::CastGlobalLines(Beam &beam, const int samples)
{
        // bind pixel shader implementing the front depth buffer functionality
        cgGLBindProgram(sCgDepthPeelingProgram);
        cgGLEnableProfile(sCgFragmentProfile);

        ApplyDepthPeeling(beam, samples);
}


void GlobalLinesRenderer::DrawGeometry()
{
}

void GlobalLinesRenderer::ApplyDepthPeeling(Beam &beam, const int samples)
{
/*      if (rtNew->IsDoubleBuffered()) 
                glDrawBuffer(GL_BACK);
        
        rtNew->BeginCapture();
        {
                cgGLBindProgram(passthru);
                glColor3f(0,0.0,0.0);
                DrawGeometry();   //just random geomerty   
        }
        rtNew->EndCapture();

        for(int l = 0; l < mCurrentDepth; l++) 
        {
                // Peel another layer
                pingpong(); // switch pointer between rendertextures
     
                rtNew->BeginCapture();
                {
                        if (rtNew->IsDoubleBuffered()) 
                                glDrawBuffer(GL_BACK);
        
                        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);         
                        
                        cgGLBindProgram(fragmentProgram);
                        cgGLSetTextureParameter(input1, rtOld->GetDepthTextureID());
                        cgGLEnableTextureParameter(input1);

            glColor3f(0,0.0,0.0);
                        DrawGeometry();
                        cgGLDisableTextureParameter(input1);
                }
                rtNew->EndCapture();
   }*/
}


}