source: GTP/trunk/Lib/Vis/Preprocessing/src/QtInterface/QtGlRenderer.cpp @ 2617

#include "glInterface.h"
#include "QtGlRenderer.h"
#include "Mesh.h"
#include "OcclusionQuery.h"
#include "ViewCellsManager.h"
#include "SceneGraph.h"
#include "Pvs.h"
#include "Viewcell.h"
#include "Beam.h"
#include "KdTree.h"
#include "Environment.h"
#include "RssPreprocessor.h"
#include "RssTree.h"
#include "Trackball.h"
#include "QtPreprocessorThread.h"
#include "Material.h"
#include "IntersectableWrapper.h"
#include "LogWriter.h"


#define USE_CG 1


#if USE_CG
#include <Cg/cg.h>
#include <Cg/cgGL.h>
#endif

#include <QVBoxLayout>

namespace GtpVisibilityPreprocessor {


  
class ViewCellsManager;

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


//static vector<OcclusionQuery *> sQueries;

QtGlRendererWidget *rendererWidget = NULL;
QtGlDebuggerWidget *debuggerWidget = NULL;

const static int SAMPLES_INCR = 2000000;



static inline bool ilt(Intersectable *obj1, Intersectable *obj2)
{
        return obj1->mId < obj2->mId;
}


inline static bool nearerThan(ViewCell *vc1, ViewCell *vc2)
{
        return vc1->GetDistance() > vc2->GetDistance();
}


#if USE_CG
static void handleCgError() 
{
    Debug << "Cg error: " << cgGetErrorString(cgGetError()) << endl;
    exit(1);
}
#endif

void
QtGlRendererBuffer::MakeCurrent()
{
  makeCurrent();
}

void
QtGlRendererBuffer::DoneCurrent()
{
  doneCurrent();
}
  

QtGlRendererBuffer::QtGlRendererBuffer(const int w,
                                                                           const int h,
                                                                           SceneGraph *sceneGraph,
                                                                           ViewCellsManager *viewcells,
                                                                           KdTree *tree):
  QGLPixelBuffer(QSize(w, h)),
  GlRendererBuffer(sceneGraph, viewcells, tree)
{
  MakeCurrent();
  InitGL();
  DoneCurrent();
}


// reimplemented here so that we can snap the error windows
float
QtGlRendererBuffer::GetPixelError(int &pvsSize)
{

  MakeCurrent();

  float pErrorPixels = -1.0f;


        mUseFalseColors = false;
        unsigned int pixelCount;


        ViewCell *viewcell = mViewCellsManager->GetViewCell(mViewPoint);
        if (viewcell == NULL)
                return 0.0f;

        ObjectPvs pvs;
        
        if (1) 
                pvs = viewcell->GetPvs();
        else 
                mViewCellsManager->ApplyFilter2(viewcell, false, 1.0f, pvs);

        mUseForcedColors = true;

        SetupCamera();
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
        glColorMask(GL_FALSE, GL_TRUE, GL_FALSE, GL_FALSE);
        glColor3f(0,1,0);


        glStencilFunc(GL_EQUAL, 0x0, 0x1);
        glStencilOp(GL_KEEP, GL_KEEP, GL_INCR); 

        // Render PVS
        ObjectPvsIterator it = pvs.GetIterator();

        pvsSize = pvs.GetSize();
        cout<<pvsSize<<endl;

        Intersectable::NewMail();
        while (it.HasMoreEntries()) 
          {
                RenderIntersectable(it.Next());
          }

        //glColorMask(GL_TRUE, GL_FALSE, GL_FALSE, GL_FALSE);
        glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
        glEnable(GL_STENCIL_TEST); 
        glColor3f(1,0,0);

        
        OcclusionQuery *query = mOcclusionQueries[0];

        //      SetupCamera();

        Intersectable::NewMail();

        query->BeginQuery();

        RenderScene();
        
        query->EndQuery();
        glDisable(GL_STENCIL_TEST); 

        // reenable other state
        //  int wait=0;
        //  while (!query.ResultAvailable()) {
        //      wait++;
        //  }
        

        pixelCount = query->GetQueryResult();
        //      cout<<"pc="<<pixelCount<<endl;
        
        pErrorPixels = ((float)pixelCount)/(GetWidth()*GetHeight());


        if (mSnapErrorFrames && (0 && pErrorPixels >= 0.01f)) {
          glReadBuffer(GL_BACK);
          //glReadBuffer(GL_FRONT);
          
          char filename[256];
          sprintf(filename, "error-frame-%04d-%0.5f.png", mFrame, pErrorPixels);
          QImage im = toImage();
          string str = mSnapPrefix + filename;
          QString qstr(str.c_str());
          
          im.save(qstr, "PNG");
          if (0) { //0 && mFrame == 1543) {
                int x,y;
                int lastIndex = -1;
                for (y=0; y < im.height(); y++)
                  for (x=0; x < im.width(); x++) {
                        QRgb p = im.pixel(x,y);
                        int index = qRed(p) + (qGreen(p)<<8) + (qBlue(p)<<16);
                        if (qGreen(p) != 255 && index!=0) {
                          if (index != lastIndex) {
                                //                              Debug<<"ei="<<index<<" ";
                                lastIndex = index;
                          }
                        }
                  }
          }
          
          mUseFalseColors = false;
          glPushAttrib(GL_CURRENT_BIT);
          glColor3f(0,1,0);
          glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
          glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
          
          // Render PVS
          Intersectable::NewMail();
          
          
          ObjectPvsIterator it = pvs.GetIterator();
          for (; it.HasMoreEntries(); ) 
                {
                  RenderIntersectable(it.Next());
                }

          mUseForcedColors = false;
          
          im = toImage();
          sprintf(filename, "error-frame-%04d-%0.5f-pvs.png", mFrame, pErrorPixels);
          str = mSnapPrefix + filename;
          qstr = str.c_str();
          im.save(qstr, "PNG");
          glPopAttrib();
        }
        
        glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);

        DoneCurrent();

        return pErrorPixels;
}

int
QtGlRendererBuffer::ComputePvs(ObjectContainer &objects, 
                                                           ObjectContainer &pvs) const
{
        int pvsSize = 0;
        QImage image = toImage();
        Intersectable::NewMail();

        std::stable_sort(objects.begin(), objects.end(), ilt);

        MeshInstance dummy(NULL);

        Intersectable *obj = NULL;

        for (int x = 0; x < image.width(); ++ x)
        {
                for (int y = 0; y < image.height(); ++ y)
                {
                        QRgb pix = image.pixel(x, y);
                        const int id = GetId(qRed(pix), qGreen(pix), qBlue(pix));

                        dummy.SetId(id);

                        ObjectContainer::iterator oit =
                                lower_bound(objects.begin(), objects.end(), &dummy, ilt);


                        if (//(oit != oit.end()) && 
                                ((*oit)->GetId() == id) && 
                                !obj->Mailed())
                        {
                                obj = *oit;
                                obj->Mail();
                                ++ pvsSize;
                                pvs.push_back(obj);
                        }
                }
        }

        return pvsSize;
}


void QtGlRendererWidget::InitGL()
{
        GlRenderer::InitGL();

        GLfloat mat_ambient[] = {0.5f, 0.5f, 0.5f, 1.0f};
        
        // mat_specular and mat_shininess are NOT default values
        GLfloat mat_diffuse[] = {1.0f, 1.0f, 1.0f, 1.0f};
        GLfloat mat_specular[] = {0.3f, 0.3f, 0.3f, 1.0f};
        GLfloat mat_shininess[] = {1.0f};

        GLfloat light_ambient[] = {0.2f, 0.2f, 0.2f, 1.0f};
        GLfloat light_diffuse[] = {0.4f, 0.4f, 0.4f, 1.0f};
        GLfloat light_specular[] = {0.3f, 0.3f, 0.3f, 1.0f};

        GLfloat lmodel_ambient[] = {0.3f, 0.3f, 0.3f, 1.0f};


        // default Material
        glMaterialfv(GL_FRONT, GL_AMBIENT, mat_ambient);
        glMaterialfv(GL_FRONT, GL_DIFFUSE, mat_diffuse);
        glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
        glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess);

        // a light
        glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
        glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
        glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);

        glLightfv(GL_LIGHT1, GL_AMBIENT, light_ambient);
        glLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse);
        glLightfv(GL_LIGHT1, GL_SPECULAR, light_specular);

        glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);

        glEnable(GL_LIGHTING);
        glEnable(GL_LIGHT0);
        glEnable(GL_LIGHT1);

        // set position of the light
        GLfloat infinite_light[] = {  1.0, 0.8, 1.0, 0.0  };
        glLightfv (GL_LIGHT0, GL_POSITION, infinite_light);

        // set position of the light2
        GLfloat infinite_light2[] = {  -0.3, 1.5, 1.0, 0.0  };
        glLightfv (GL_LIGHT1, GL_POSITION, infinite_light2);

        glColorMaterial( GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
        // glColorMaterial( GL_FRONT_AND_BACK, GL_SPECULAR);
        glEnable(GL_COLOR_MATERIAL);

        glShadeModel(GL_FLAT);
}


void
QtGlRendererWidget::SetupCameraProjection(const int w, const int h, const float angle)
{
        if (!mTopView) {
                int ww = w;
                int hh = h;
                glViewport(0, 0, ww, hh);
                glMatrixMode(GL_PROJECTION);
                glLoadIdentity();
                gluPerspective(angle, ww/(float)hh, 0.1, 2.0 * Magnitude(mSceneGraph->GetBox().Diagonal()));
                glMatrixMode(GL_MODELVIEW);
        } else {
                int ww = w;
                int hh = h;
                glViewport(0, 0, ww, hh);
                glMatrixMode(GL_PROJECTION);
                glLoadIdentity();
                gluPerspective(50.0, ww / (float)hh, 0.1, 20.0 * Magnitude(mSceneGraph->GetBox().Diagonal()));
                glMatrixMode(GL_MODELVIEW);
        }
}


bool QtGlRendererWidget::PvsChanged(ViewCell *viewCell) const
{
        if (viewCell != mPvsCache.mViewCell)
                return true;

        if (viewCell->GetPvs().GetSize() != mPvsCache.mUnfilteredPvsSize)
                return true;

        return false;
}


void QtGlRendererWidget::_RenderPvs()
{
        mUseFalseColors = false;

        int offset = (int)mObjects.size() * 3;
        char *arrayPtr = mUseVbos ? NULL : (char *)mData;

        glVertexPointer(3, GL_FLOAT, 0, (char *)arrayPtr);
        glNormalPointer(GL_FLOAT, 0, (char *)arrayPtr + offset * sizeof(Vector3));
        glDrawElements(GL_TRIANGLES, mIndexBufferSize, GL_UNSIGNED_INT, mIndices);
#if DYNAMIC_OBJECTS_HACK
        // handle dynamic objects
        DynamicObjectsContainer::const_iterator dit, dit_end = mDynamicObjects.end();


        for (dit = mDynamicObjects.begin(); dit != dit_end; ++ dit)
        {
#if USE_TRANSFORMED_MESH_INSTANCE_HACK
                //cerr << "here45\n****"<<endl;
                RenderIntersectable(*dit);
#else
                RenderDynamicObject(*dit);
#endif
        }
#endif
}


void QtGlRendererWidget::PreparePvs()
{
        int indexBufferSize = 0;
        
        KdNode::NewMail();
        //Intersectable::NewMail();

        mPvsSize = mPvsCache.mPvs.GetSize();
#if DYNAMIC_OBJECTS_HACK
        mDynamicObjects.clear();
#endif
        ObjectPvsIterator it = mPvsCache.mPvs.GetIterator();

        while (it.HasMoreEntries()) 
        {
                Intersectable *obj = it.Next();
                switch (obj->Type())
                {
                case Intersectable::KD_INTERSECTABLE:
                        {
                                KdNode *node = static_cast<KdIntersectable *>(obj)->GetItem();
                                _UpdatePvsIndices(node, indexBufferSize);
                        }
                        break;
#if DYNAMIC_OBJECTS_HACK
#if USE_TRANSFORMED_MESH_INSTANCE_HACK

                case Intersectable::TRANSFORMED_MESH_INSTANCE:
                        mDynamicObjects.push_back(static_cast<TransformedMeshInstance *>(obj));
                        break;

#else
                case Intersectable::SCENEGRAPHLEAF_INTERSECTABLE:
                        mDynamicObjects.push_back(static_cast<SceneGraphLeafIntersectable *>(obj)->GetItem());
                        break;
#endif
#endif
                default:
                        cerr << "PreparePvs: type " << Intersectable::GetTypeName(obj) << " not handled yet" << endl;
                }
        }

        mIndexBufferSize = indexBufferSize;
}


void QtGlRendererWidget::_UpdatePvsIndices(KdNode *node, int &indexBufferSize)
{
        if (node->Mailed())
                return;

        node->Mail();

        // if (mObjects.size() * 3 < indexBufferSize) cerr << "problem: " << mObjects.size() * 3 << " < " << indexBufferSize << endl;
        if (!node->IsLeaf()) 
        {
                KdInterior *kdInterior = static_cast<KdInterior *>(node);

                _UpdatePvsIndices(kdInterior->mBack, indexBufferSize);
                _UpdatePvsIndices(kdInterior->mFront, indexBufferSize);
        } 
        else 
        {
                KdLeaf *leaf = static_cast<KdLeaf *>(node);

                leaf->mIndexBufferStart = indexBufferSize;

                for (size_t i = 0; i < leaf->mObjects.size(); ++ i)
                {
                        TriangleIntersectable *obj = 
                                static_cast<TriangleIntersectable *>(leaf->mObjects[i]);

                        if (obj->mRenderedFrame != mCurrentFrame)
                        {
                                obj->mRenderedFrame = mCurrentFrame;

                                mIndices[indexBufferSize + 0] = (obj->GetId() - 1) * 3 + 0;
                                mIndices[indexBufferSize + 1] = (obj->GetId() - 1) * 3 + 1;
                                mIndices[indexBufferSize + 2] = (obj->GetId() - 1) * 3 + 2;

                                indexBufferSize += 3;
                        }
                }

                leaf->mIndexBufferSize = indexBufferSize - leaf->mIndexBufferStart;
        }

        //cout << "id: " << indexBufferSize << endl;
}


void QtGlRendererWidget::RenderPvs()
{
        if (mUseVbos) 
                glBindBufferARB(GL_ARRAY_BUFFER_ARB, mVboId);

        ++ mCurrentFrame;

        EnableDrawArrays();

        //Intersectable::NewMail();
        
        if (mDetectEmptyViewSpace) 
                glEnable(GL_CULL_FACE);
        else
                glDisable(GL_CULL_FACE);

        ViewCell *viewcell = NULL;
        viewcell = mViewCellsManager->GetViewCell(mViewPoint, true);

        if (viewcell) 
        {
                // copy the pvs so that it can be filtered ...
                if (PvsChanged(viewcell)) 
                {
                        mPvsCache.Reset();
                        mPvsCache.mViewCell = viewcell;
                        mPvsCache.mUnfilteredPvsSize = viewcell->GetPvs().GetSize();

                        if (mUseSpatialFilter) 
                        {
                                //mMutex.lock();
                                // mSpatialFilter size is in range 0.001 - 0.1
                                mViewCellsManager->ApplyFilter2(viewcell,
                                                                    mUseFilter,
                                                                    100.0f * mSpatialFilterSize,
                                                                    //pvs,
                                                                                                mPvsCache.mPvs,         
                                                                    &mPvsCache.filteredBoxes);
                                //mPvsCache.mPvs = pvs;
                                //mMutex.unlock();
                                cout << "pvs size: " << mPvsCache.mPvs.GetSize() << endl;
                        }
                        else
                        {
                                mPvsCache.mPvs = viewcell->GetPvs();
                        }

                        /// update the indices for rendering
                        PreparePvs();

                        emit PvsUpdated();
                }


                // Render PVS
                if (mUseSpatialFilter && mRenderBoxes) 
                {
                        for (int i=0; i < mPvsCache.filteredBoxes.size(); ++ i)
                        {
                                RenderBox(mPvsCache.filteredBoxes[i]);
                        }
                } 
                else 
                {
                        if (!mRenderVisibilityEstimates && !mUseRandomColorPerPvsObject)
                                _RenderPvs();
                        else
                                _RenderColoredPvs();
                }

                if (mRenderFilter) 
                {
                        mWireFrame = true;
                        RenderIntersectable(viewcell);
                        
                        /*glPushMatrix();
                        glTranslatef(mViewPoint.x, mViewPoint.y, mViewPoint.z);
                        glScalef(5.0f,5.0f,5.0f);
                        glPushAttrib(GL_CURRENT_BIT);
                        glColor3f(1.0f, 0.0f, 0.0f);
                        //        gluSphere((::GLUquadric *)mSphere,
                        //                              1e-3*Magnitude(mViewCellsManager->GetViewSpaceBox().Size()), 6, 6);
                        glPopAttrib();
                        glPopMatrix();
                        */
                        mWireFrame = false;
                }
        } 
        else 
        {
                //ObjectContainer::const_iterator oi = mObjects.begin();
                //for (; oi != mObjects.end(); oi++)
                //      RenderIntersectable(*oi);
                RenderScene();
        }
}

float
QtGlRendererWidget::RenderErrors()
{
        float pErrorPixels = -1.0f;

        SetupCamera();
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

        glPushAttrib(GL_ENABLE_BIT);

        glStencilFunc(GL_EQUAL, 0x0, 0x1);
        glStencilOp(GL_KEEP, GL_KEEP, GL_INCR); 

        mUseForcedColors = true;

        glColor3f(0.0f, 0.8f, 0.2f);

        // Render PVS
        RenderPvs();

        glEnable(GL_STENCIL_TEST); 

        //mUseFalseColors = true;

        glDisable(GL_LIGHTING);

        OcclusionQuery *query = mOcclusionQueries[0];
        query->BeginQuery();

        SetupCamera();

        glColor3f(1.0f, 0.0f, 0.0f);

        RenderScene();

        mUseForcedColors = false;

        query->EndQuery();

        glDisable(GL_STENCIL_TEST);
        glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);

        glPopAttrib();

        // reenable other state
        //  int wait=0;
        //  while (!query.ResultAvailable()) {
        //      wait++;
        //  }

        int pixelCount = query->GetQueryResult();
        pErrorPixels = ((float)pixelCount)/(GetWidth()*GetHeight());
        if (0) cout<<"error pixels="<<pixelCount<<endl;

        mRenderError = pErrorPixels;

        return pErrorPixels;
}


void QtGlRendererWidget::timerEvent(QTimerEvent *event) 
{
        //std::cout << "Timer ID:" << event->timerId();
        update();
}


void QtGlRendererWidget::mousePressEvent(QMouseEvent *e)
{
        int x = e->pos().x();
        int y = e->pos().y();

        mousePoint.x = x;
        mousePoint.y = y;

}

void
QtGlRendererWidget::mouseMoveEvent(QMouseEvent *e)
{
        float MOVE_SENSITIVITY = Magnitude(mSceneGraph->GetBox().Diagonal())*1e-3;
        float TURN_SENSITIVITY = 0.1f;
        float TILT_SENSITIVITY = 32.0 ;
        float TURN_ANGLE= M_PI  /36.0 ;

        int x = e->pos().x();
        int y = e->pos().y();

        int diffx = -(mousePoint.x - x);
        int diffy = -(mousePoint.y - y);

        const float t = 1.0f;

        if (e->modifiers() & Qt::ControlModifier) 
        {
                mViewPoint.y += (y-mousePoint.y)*MOVE_SENSITIVITY / 2.0;
                mViewPoint.x += (x-mousePoint.x)*MOVE_SENSITIVITY / 2.0;
        } 
#if DYNAMIC_OBJECTS_HACK
        else if (e->modifiers() & Qt::AltModifier)
        {
                if (mCurrentDynamicObjectIdx >= 0)
                {
                        Matrix4x4 tm;
                        TransformedMeshInstance *tmi;
#if USE_TRANSFORMED_MESH_INSTANCE_HACK

                        switch (mTrafoType)
                        {
                        case 0:
                                {
                                        const Vector3 transl(diffx, 0, diffy);
                                        tmi = mViewCellsManager->GetPreprocessor()->mDynamicObjects[mCurrentDynamicObjectIdx];
                                        tm = TranslationMatrix(transl);
                                }
                                break;
                        case 1:
                                {
                                        float scalef = 1.0f + 0.01f * (diffx + diffy);
                                        if (scalef < 0.9) scalef = 0.9f;
                                        else if (scalef > 1.1f) scalef = 1.1f;
                                        tmi = mViewCellsManager->GetPreprocessor()->mDynamicObjects[mCurrentDynamicObjectIdx];
                                        tm = ScaleMatrix(scalef, scalef, scalef);
                                }
                                break;
                        case 2:
                                {
                                        tmi = mViewCellsManager->GetPreprocessor()->mDynamicObjects[mCurrentDynamicObjectIdx];
                                        tm = RotationXMatrix(diffx) * RotationYMatrix(diffy);
                                }
                                break;
                        default:
                                cerr << "not implemented" << endl;
                        }

                        tmi->ApplyWorldTransform(tm);
#endif
                        updateGL();
                }
        }
#endif
        else
        {
                mViewPoint += mViewDirection*((mousePoint.y - y)*MOVE_SENSITIVITY);
                float adiff = TURN_ANGLE*(x - mousePoint.x)*-TURN_SENSITIVITY;
                float angle = atan2(mViewDirection.x, mViewDirection.z);
                mViewDirection.x = sin(angle + adiff);
                mViewDirection.z = cos(angle + adiff);
        }

        mousePoint.x = x;
        mousePoint.y = y;

        updateGL();
}

void
QtGlRendererWidget::mouseReleaseEvent(QMouseEvent *)
{
}

void
QtGlRendererWidget::resizeGL(int w, int h)
{
        SetupCameraProjection(w, h);
        updateGL();
}

void
QtGlRendererWidget::paintGL()
{
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        if (1) 
        {
                SetupCameraProjection(width(), height());
                SetupCamera();

                if (mRenderErrors) 
                {
                        RenderErrors();
                } 
                else 
                {
                        glColor3f(0.6f, 0.6f, 0.6f);
                        RenderPvs();
                }

                if (1 && mShowRays) 
                {
                        RenderRays(mViewCellsManager->mVizBuffer.GetRays(), mRayVisualizationMethod, mShowDistribution, 1);
                }
        }

        RenderInfo();
        mFrame ++;
}


void
QtGlRendererWidget::SetupCamera()
{
        if (!mTopView)
                GlRenderer::SetupCamera();
        else 
        {
                if (0) 
                {
                        float dist = Magnitude(mSceneGraph->GetBox().Diagonal())*0.05;
                        Vector3 pos = mViewPoint - dist*Vector3(mViewDirection.x,
                                -1,
                                mViewDirection.y);

                        Vector3 target = mViewPoint + dist*mViewDirection;
                        Vector3 up(0,1,0);

                        glLoadIdentity();
                        gluLookAt(pos.x, pos.y, pos.z,
                                target.x, target.y, target.z,
                                up.x, up.y, up.z);
                } 
                else 
                {
                        float dist = Magnitude(mSceneGraph->GetBox().Diagonal()) * mTopDistance;
                        Vector3 pos = mViewPoint  + dist*Vector3(0,
                                1,
                                0);

                        Vector3 target = mViewPoint;
                        Vector3 up(mViewDirection.x, 0, mViewDirection.z);

                        glLoadIdentity();
                        gluLookAt(pos.x, pos.y, pos.z,
                                target.x, target.y, target.z,
                                up.x, up.y, up.z);

                }
        }

}


void
QtGlRendererWidget::keyPressEvent ( QKeyEvent * e )
{
        switch (e->key()) 
        {
case Qt::Key_E:
        mRenderErrors = !mRenderErrors;
        updateGL();
        break;
case Qt::Key_R:
        mUseRandomColorPerPvsObject = !mUseRandomColorPerPvsObject;;
        updateGL();
        break;
case Qt::Key_T:
        mTopView = !mTopView;
        SetupCameraProjection(width(), height());
        updateGL();
        break;
case Qt::Key_V:
        mRenderViewCells = !mRenderViewCells;
        updateGL();
        break;
case Qt::Key_P:
        // set random viewpoint
        mViewCellsManager->GetViewPoint(mViewPoint);
        updateGL();
        break;
case Qt::Key_S: {
        // set view poitn and direction
        QString text;
        bool ok;
        text.sprintf("%f %f %f", mViewPoint.x, mViewPoint.y, mViewPoint.z);
        text = QInputDialog::getText(this,
                "Enter a view point",
                "",
                QLineEdit::Normal,
                text,
                &ok);
        if (!ok)
                break;

        if (sscanf(text.toAscii(), "%f %f %f", &mViewPoint.x, &mViewPoint.y, &mViewPoint.z) == 3) {
                text.sprintf("%f %f %f", mViewDirection.x, mViewDirection.y, mViewDirection.z);
                text = QInputDialog::getText(this,
                        "Enter a direction",
                        "",
                        QLineEdit::Normal,
                        text,
                        &ok);
                if (!ok)
                        break;
                if (sscanf(text.toAscii(), "%f %f %f", &mViewDirection.x,
                        &mViewDirection.y, &mViewDirection.z) == 3) {
                                updateGL();
                        }
                        break;
        }
                                }
default:
        cerr << "unknown key" << endl;
        e->ignore();
        break;
        }
}



QtGlRendererWidget::QtGlRendererWidget(
                                                                           SceneGraph *sceneGraph,
                                                                           ViewCellsManager *viewcells,
                                                                           KdTree *tree,
                                                                           QWidget * parent,
                                                                           const QGLWidget * shareWidget,
                                                                           Qt::WFlags f
                                                                           )
                                                                           :
GlRendererWidget(sceneGraph, viewcells, tree), QGLWidget(parent, shareWidget, f)
{
        mPreprocessorThread = NULL;
        mTopView = false;
        mRenderViewCells = false;
        mTopDistance = 1.0f;
        mCutViewCells = false;
        mCutScene = false;
        mRenderErrors = false;
        mRenderBoxes = false;
        mRenderFilter = true;
        mRenderVisibilityEstimates = false;

        mUseRandomColorPerPvsObject = false;

        mHideByCost = false;
        mUseTransparency = false;

        mTransferFunction = 1.0f;
        mIndexBufferSize = 0;

        //mCurrentFrame = 0;

        const int delay = 250; // in milliseconds
        timerId = startTimer(delay);

        bool tmp;

        Environment::GetSingleton()->GetBoolValue("Preprocessor.applyVisibilityFilter", tmp );
        mUseFilter = tmp;

        Environment::GetSingleton()->GetBoolValue("Preprocessor.applyVisibilitySpatialFilter", tmp );
        mUseSpatialFilter = tmp;

        //mLogWriter = new LogWriter("myfile.out");

        mShowRenderCost = false;
        mShowPvsSizes = false;
        mShowComparison = false;
        mShowPiercingRays = false;
        mShowWeightedRays = false;
        mUseStandardColors = false;
        mShowWeightedCost = true;

        mShowDistanceWeightedPvs = true;
        mShowDistanceWeightedTriangles = false;
        mShowWeightedTriangles = false;
        mShowDistribution = 15;
        mCurrentDynamicObjectIdx = -1;

        mSpatialFilterSize = 0.01;
        mPvsSize = 0;
        mRayVisualizationMethod = 0;
        mTrafoType = 0;

        mRenderError = 0.0f;
        mShowRays = false;

        mControlWidget = new QtRendererControlWidget(NULL);

        connect(mControlWidget, SIGNAL(SetViewCellGranularity(int)), this, SLOT(SetViewCellGranularity(int)));
        connect(mControlWidget, SIGNAL(SetTransferFunction(int)), this, SLOT(SetTransferFunction(int)));

        connect(mControlWidget, SIGNAL(UpdateAllPvs()), this, SLOT(UpdateAllPvs()));
        connect(mControlWidget, SIGNAL(ComputeVisibility()), this, SLOT(ComputeVisibility()));
        connect(mControlWidget, SIGNAL(StopComputation()), this, SLOT(StopComputation()));
        connect(mControlWidget, SIGNAL(SetRandomViewPoint()), this,     SLOT(SetRandomViewPoint()));
        connect(mControlWidget, SIGNAL(StoreStatistics(void)), this, SLOT(StoreStatistics(void)));
        connect(mControlWidget, SIGNAL(LoadObject(void)), this, SLOT(LoadObject(void)));

        connect(mControlWidget, SIGNAL(SetSceneCut(int)), this, SLOT(SetSceneCut(int)));
        connect(mControlWidget, SIGNAL(SetTopDistance(int)), this, SLOT(SetTopDistance(int)));
        connect(mControlWidget, SIGNAL(SetTransparency(int)), this, SLOT(SetTransparency(int)));

        connect(mControlWidget, SIGNAL(SetVisibilityFilterSize(int)), this, SLOT(SetVisibilityFilterSize(int)));
        connect(mControlWidget, SIGNAL(SetSpatialFilterSize(int)), this, SLOT(SetSpatialFilterSize(int)));
        connect(mControlWidget, SIGNAL(SetHidingCost(int)), this, SLOT(SetHidingCost(int)));

        connect(mControlWidget, SIGNAL(SetShowViewCells(bool)), this, SLOT(SetShowViewCells(bool)));
        connect(mControlWidget, SIGNAL(SetShowRenderCost(bool)), this, SLOT(SetShowRenderCost(bool)));
        connect(mControlWidget, SIGNAL(SetUseTransparency(bool)), this, SLOT(SetUseTransparency(bool)));
        connect(mControlWidget, SIGNAL(SetShowPvsSizes(bool)), this, SLOT(SetShowPvsSizes(bool)));
        connect(mControlWidget, SIGNAL(SetShowComparison(bool)), this, SLOT(SetShowComparison(bool)));
        connect(mControlWidget, SIGNAL(SetTopView(bool)), this, SLOT(SetTopView(bool)));
        connect(mControlWidget, SIGNAL(SetCutViewCells(bool)), this, SLOT(SetCutViewCells(bool)));
        connect(mControlWidget, SIGNAL(SetHideByCost(bool)), this, SLOT(SetHideByCost(bool)));
        connect(mControlWidget, SIGNAL(SetCutScene(bool)), this, SLOT(SetCutScene(bool)));
        connect(mControlWidget, SIGNAL(SetRenderErrors(bool)), this, SLOT(SetRenderErrors(bool)));
        connect(mControlWidget, SIGNAL(SetRenderBoxes(bool)), this, SLOT(SetRenderBoxes(bool)));
        connect(mControlWidget, SIGNAL(SetRenderFilter(bool)), this, SLOT(SetRenderFilter(bool)));
        connect(mControlWidget, SIGNAL(SetRenderVisibilityEstimates(bool)), this, SLOT(SetRenderVisibilityEstimates(bool)));
        connect(mControlWidget, SIGNAL(SetUseFilter(bool)), this, SLOT(SetUseFilter(bool)));
        connect(mControlWidget, SIGNAL(SetUseSpatialFilter(bool)), this, SLOT(SetUseSpatialFilter(bool)));
        connect(mControlWidget, SIGNAL(SetShowPiercingRays(bool)), this, SLOT(SetShowPiercingRays(bool)));
        connect(mControlWidget, SIGNAL(SetShowWireFrame(bool)), this, SLOT(SetShowWireFrame(bool)));
        connect(mControlWidget, SIGNAL(SetShowWeightedRays(bool)), this, SLOT(SetShowWeightedRays(bool)));
        connect(mControlWidget, SIGNAL(SetShowWeightedCost(bool)), this, SLOT(SetShowWeightedCost(bool)));

        connect(mControlWidget, SIGNAL(SetShowDistanceWeightedTriangles(bool)), this, SLOT(SetShowDistanceWeightedTriangles(bool)));
        connect(mControlWidget, SIGNAL(SetShowDistanceWeightedPvs(bool)), this, SLOT(SetShowDistanceWeightedPvs(bool)));
        connect(mControlWidget, SIGNAL(SetShowWeightedTriangles(bool)), this, SLOT(SetShowWeightedTriangles(bool)));

        connect(mControlWidget, SIGNAL(UseConstColorForRayViz(bool)), this, SLOT(UseConstColorForRayViz(bool)));
        connect(mControlWidget, SIGNAL(UseRayLengthForRayViz(bool)), this, SLOT(UseRayLengthForRayViz(bool)));
        connect(mControlWidget, SIGNAL(SetShowContribution(bool)), this, SLOT(SetShowContribution(bool)));
        connect(mControlWidget, SIGNAL(SetShowDistribution(bool)), this, SLOT(SetShowDistribution(bool)));

        connect(mControlWidget, SIGNAL(SetShowDistribution1(bool)), this, SLOT(SetShowDistribution1(bool)));
        connect(mControlWidget, SIGNAL(SetShowDistribution2(bool)), this, SLOT(SetShowDistribution2(bool)));
        connect(mControlWidget, SIGNAL(SetShowDistribution3(bool)), this, SLOT(SetShowDistribution3(bool)));
        connect(mControlWidget, SIGNAL(SetShowDistribution4(bool)), this, SLOT(SetShowDistribution4(bool)));

        connect(mControlWidget, SIGNAL(SetShowRays(bool)), this, SLOT(SetShowRays(bool)));

        connect(mControlWidget, SIGNAL(SetTranslation(bool)), this, SLOT(SetTranslation(bool)));
        connect(mControlWidget, SIGNAL(SetRotation(bool)), this, SLOT(SetRotation(bool)));
        connect(mControlWidget, SIGNAL(SetScale(bool)), this, SLOT(SetScale(bool)));
        
        setWindowTitle("PVS Visualization");

        // setting the main window size here
        //resize(800, 600);
        //resize(640, 480);
        //resize(512, 384);
        //resize(512, 320);
        resize(640, 400);
        
        mControlWidget->show();
}

void
QtGlRendererWidget::UpdateAllPvs()
{
        // $$ does not work so far:(
        mViewCellsManager->UpdatePvsForEvaluation();
        //      mViewCellsManager->FinalizeViewCells(false);
}

void
QtGlRendererWidget::ComputeVisibility()
{
        cerr<<"Compute Visibility called!\n"<<endl;
        if (!mPreprocessorThread->isRunning())
                mPreprocessorThread->RunThread();
}

void
QtGlRendererWidget::StopComputation()
{
        cerr<<"stop computation called!\n"<<endl;
        mViewCellsManager->GetPreprocessor()->mStopComputation = true;
}

void
QtGlRendererWidget::SetRandomViewPoint()
{
        cerr<<"setting random view point!\n"<<endl;
        mViewCellsManager->GetViewPoint(mViewPoint);
        updateGL();
}


void QtGlRendererWidget::StoreStatistics()
{
        cerr<<"storing statistics!\n"<<endl;
        const int currentSamples = mViewCellsManager->GetPreprocessor()->mCurrentSamples;

        cout<<"**********************************************" << endl;
        cout << "reached " << currentSamples << " samples " << " => writing file" << endl;
                
        LogWriter writer;
        writer.SetFilename("compare.log");
        writer.Write(currentSamples, mViewCellsManager->GetViewCells());
        cout << "finished writing file" << endl;
        mCompareInfo.clear();
        updateGL();
}


void QtGlRendererWidget::LoadObject()
{
        string filename("../data/teapot.bn");
        
        cout << "Loading model << " << filename << endl;

        ++ mCurrentDynamicObjectIdx;

        if (mViewCellsManager->GetPreprocessor()->LoadDynamicGeometry(filename))
                cout << "Loading finished" << endl;
        else
                cerr << "Loading failed" << endl;

    updateGL();
}

void
QtGlRendererWidget::RenderRenderCost()
{
        static vector<float> costFunction;
        static float maxCost = -1;
        if (costFunction.size()==0) {
                ViewCellsTree *tree = mViewCellsManager->GetViewCellsTree();
                if (tree) {
                        tree->GetCostFunction(costFunction);
                        maxCost = -1;
                        for (int i=0;  i < costFunction.size(); i++) {
                                //                cout<<i<<":"<<costFunction[i]<<" ";
                                // update cost function to an absolute value based on the total geometry count
                                costFunction[i] *= mSceneGraph->GetSize();
                                if (costFunction[i] > maxCost)
                                        maxCost = costFunction[i];
                        }
                }
        }


        int currentPos = (int)mViewCellsManager->GetViewCells().size();
        float currentCost= -1;

        if (currentPos < costFunction.size())
                currentCost = costFunction[currentPos];
#if 1   
        cout<<"costFunction.size()="<<(int)costFunction.size()<<endl;
        cout<<"CP="<<currentPos<<endl;
        cout<<"MC="<<maxCost<<endl;
        cout<<"CC="<<currentCost<<endl;
#endif
        if (costFunction.size()) {
                float scaley = 1.0f/log10(maxCost);
                float scalex = 1.0f/(float)costFunction.size();

                glDisable(GL_DEPTH_TEST);
                // init ortographic projection
                glMatrixMode(GL_PROJECTION);

                glPushMatrix();

                glLoadIdentity();
                gluOrtho2D(0, 1.0f, 0, 1.0f);

                glTranslatef(0.1f, 0.1f, 0.0f);
                glScalef(0.8f, 0.8f, 1.0f);
                glMatrixMode(GL_MODELVIEW);
                glLoadIdentity();

                glColor3f(1.0f,0,0);
                glBegin(GL_LINE_STRIP);
                //        glVertex3f(0,0,0);

                for (int i=0;  i < costFunction.size(); i++) {
                        float x =  i*scalex;
                        float y = log10(costFunction[i])*scaley;
                        glVertex3f(x,y,0.0f);
                }
                glEnd();

                glColor3f(1.0f,0,0);
                glBegin(GL_LINES);
                float x =  currentPos*scalex;
                glVertex3f(x,0.0,0.0f);
                glVertex3f(x,1.0f,0.0f);
                glEnd();

                glColor3f(0.0f,0,0);
                // show a grid
                glBegin(GL_LINE_LOOP);
                glVertex3f(0,0,0.0f);
                glVertex3f(1,0,0.0f);
                glVertex3f(1,1,0.0f);
                glVertex3f(0,1,0.0f);
                glEnd();

                glBegin(GL_LINES);
                for (int i=0;  i < costFunction.size(); i += 1000) {
                        float x =  i*scalex;
                        glVertex3f(x,0.0,0.0f);
                        glVertex3f(x,1.0f,0.0f);
                }

                for (int i=0;  pow(10.0f, i) < maxCost; i+=1) {
                        float y = i*scaley;
                        //              QString s;
                        //              s.sprintf("%d", (int)pow(10,i));
                        //              renderText(width()/2+5, y*height(), s);
                        glVertex3f(0.0f, y, 0.0f);
                        glVertex3f(1.0f, y, 0.0f);
                }

                glEnd();


                // restore the projection matrix
                glMatrixMode(GL_PROJECTION);
                glPopMatrix();
                glMatrixMode(GL_MODELVIEW);
                glEnable(GL_DEPTH_TEST);

        }



}

void
QtGlRendererWidget::RenderInfo()
{

        QString s;

        int vc = 0;
        if (mViewCellsManager)
                vc = (int)mViewCellsManager->GetViewCells().size();

        int filter = 0;
        if (mViewCellsManager)
                filter = mViewCellsManager->GetMaxFilterSize();

        glColor3f(0.0f, 0.0f, 1.0f);

#if REMOVE_TEMPORARY
        s.sprintf("frame:%04d viewpoint:(%4.1f,%4.1f,%4.1f) dir:(%4.1f,%4.1f,%4.1f)",
                mFrame,
                mViewPoint.x,
                mViewPoint.y,
                mViewPoint.z,
                mViewDirection.x,
                mViewDirection.y,
                mViewDirection.z
                );

        renderText(20, 20, s);

        s.sprintf("viewcells:%04d filter:%04d pvs:%04d error:%5.5f %",
                vc,
                filter,
                mPvsSize,
                mRenderError*100.0f);

        renderText(20, 40, s);
#endif
        
        QFont font40; font40.setPointSize(30);
        s.sprintf("PVS: %04d", mPvsSize);
        renderText(20, 40, s, font40);
}


void
QtGlRendererWidget::SetViewCellGranularity(int number)
{
        if (mViewCellsManager) {
                //      mViewCellsManager->SetMaxFilterSize(number);

                // $$ tmp off
                mViewCellsManager->CollectViewCells(number);

                // $$ does not work so far:(
                //      mViewCellsManager->UpdatePvsForEvaluation();
                //      mViewCellsManager->FinalizeViewCells(false);
        }
        updateGL();
}

void
QtGlRendererWidget::SetVisibilityFilterSize(int number)
{
        if (mViewCellsManager) 
                mViewCellsManager->SetMaxFilterSize(number);
        mPvsCache.Reset();
        updateGL();
}

void
QtGlRendererWidget::SetSpatialFilterSize(int number)
{
        mSpatialFilterSize = 1e-3*number;
        mPvsCache.Reset();
        updateGL();
}

void
QtGlRendererWidget::SetSceneCut(int number)
{
        // assume the cut plane can only be aligned with xz plane
        // shift it along y according to number, which is percentage of the bounding
        // box position
        if (mViewCellsManager) 
        {
                const float f = number / 1000.0f;
                AxisAlignedBox3 box = mViewCellsManager->GetViewSpaceBox();
                Vector3 p = (1.0f - f) * box.Min() + f * box.Max();
                mSceneCutPlane.mNormal = Vector3(0,-1,0);
                mSceneCutPlane.mD = -DotProd(mSceneCutPlane.mNormal, p);

                updateGL();
        }
}

void
QtGlRendererWidget::SetHidingCost(int number)
{
        mHidingCost = (float)number / 1000.0f;
}


void
QtGlRendererWidget::SetTopDistance(int number)
{
        mTopDistance = number / 1000.0f;
        updateGL();
}

void QtGlRendererWidget::SetTransparency(int number)
{
        mTransparency = number / 1000.0f;
        updateGL();
}

#if 0
float QtGlRendererWidget::ComputeRenderCost(ViewCell *vc)
{
        ObjectPvs basePvs;
        
        basePvs = vc->CopyPvs();
        ObjectPvsIterator pit = basePvs.GetIterator();

        float renderCost = 0;

        //cout << "cost vis: " << mShowDistanceWeightedPvs << " " << " " << mShowDistanceWeightedTriangles << " " << mShowWeightedTriangles << endl;
        
        // first mark all objects from this pvs
        while (pit.HasMoreEntries())    
        {
                KdIntersectable *kdObj = static_cast<KdIntersectable *>(pit.Next());

                if (mShowDistanceWeightedPvs)
                {
                        const AxisAlignedBox3 box = kdObj->GetBox();

                        const float dist = SqrDistance(vc->GetBox().Center(), box.Center());
                        renderCost += 1.0f / dist;
                }
                else if (mShowDistanceWeightedTriangles)
                {
                        const AxisAlignedBox3 box = kdObj->GetBox();

                        const float dist = SqrDistance(vc->GetBox().Center(), box.Center());
                        renderCost += kdObj->ComputeNumTriangles() / dist;
                }
                else //if (mShowWeightedTriangles)
                {
                        renderCost += kdObj->ComputeNumTriangles();
                }
                //if (pit.Next()->Mail();
        }

        return renderCost;
}
#else

float QtGlRendererWidget::ComputeRenderCost(ViewCell *vc)
{
        float renderCost = 0;

#ifndef USE_BIT_PVS
        if (mShowDistanceWeightedPvs)
        {
                return vc->GetPvs().mStats.mDistanceWeightedPvs;
        }
        else if (mShowDistanceWeightedTriangles)
        {
                return vc->GetPvs().mStats.mDistanceWeightedTriangles;
        }
        else //if (mShowWeightedTriangles)
        {
                return vc->GetPvs().mStats.mWeightedTriangles;
        }
#else
        return 0.0f;
#endif
}
#endif



void QtGlRendererWidget::ComputeMaxValues(const ViewCellContainer &viewCells,
                                                                                  int &maxPvs, 
                                                                                  int &maxPiercingRays, 
                                                                                  float &maxRelativeRays, 
                                                                                  float &maxRcCost)
{
        maxPvs = -1;
        maxPiercingRays = 1; // not zero for savety
        maxRelativeRays = Limits::Small; // not zero for savety
        maxRcCost = Limits::Small;

        for (size_t i = 0; i < viewCells.size(); ++ i) 
        {
                ViewCell *vc = viewCells[i];

                if (mShowPvsSizes) // pvs size
                {
                        //const int p = vc->GetPvs().CountObjectsInPvs();
                        const int p = vc->GetPvs().GetSize();
                        if (p > maxPvs)
                                maxPvs = p;
                }
                else if (mShowPiercingRays) // relative number of rays
                {
                        const int piercingRays = vc->GetNumPiercingRays();

                        if (piercingRays > maxPiercingRays)
                                maxPiercingRays = piercingRays;
                } 
                else if (mShowWeightedRays)
                {
                        const int piercingRays = vc->GetNumPiercingRays();

                        const float relativeArea = 
                                vc->GetBox().SurfaceArea() / mViewCellsManager->GetViewSpaceBox().SurfaceArea();

                        if ((float)piercingRays / relativeArea > maxRelativeRays)
                                maxRelativeRays = (float)piercingRays / relativeArea;
                }
                else if (mShowWeightedCost)
                {
                        const float rcCost = ComputeRenderCost(vc);
                        mViewCellsManager->UpdateScalarPvsCost(vc, rcCost);

                        if (rcCost > maxRcCost)
                                maxRcCost = rcCost;
                }
        }
}


void QtGlRendererWidget::RenderViewCells()
{
        mUseFalseColors = true;
        //glPushAttrib(GL_CURRENT_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT);

        glEnable(GL_CULL_FACE);
        glCullFace(GL_FRONT);
        //glDisable(GL_CULL_FACE);

        if (mCutViewCells) 
        {
                double eq[4];
                eq[0] = mSceneCutPlane.mNormal.x;
                eq[1] = mSceneCutPlane.mNormal.y;
                eq[2] = mSceneCutPlane.mNormal.z;
                eq[3] = mSceneCutPlane.mD;

                glClipPlane(GL_CLIP_PLANE0, eq);
                glEnable(GL_CLIP_PLANE0);
        }

        ViewCellContainer &viewcells = mViewCellsManager->GetViewCells();
        
        int maxPvs, maxPiercingRays;
        float maxRelativeRays, maxRcCost;

        ComputeMaxValues(viewcells, maxPvs, maxPiercingRays, maxRelativeRays, maxRcCost);
        // matt: temp hack
        //maxRcCost = 200.0f;
        //cout << "maxRcCost: " << maxRcCost << endl;
        int i;

        // transparency 
        if (!mUseTransparency)
        {
                glEnable(GL_DEPTH_TEST);
                glDisable(GL_BLEND);
        }
        else
        {
                glDisable(GL_DEPTH_TEST);
                glEnable(GL_BLEND);

                glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
                //glBlendFunc(GL_SRC_ALPHA, GL_ONE);

                for (i = 0; i < viewcells.size(); ++ i) 
                {
                        ViewCell *vc = viewcells[i];

                        const float dist = SqrDistance(mDummyViewPoint, vc->GetBox().Center());
                        vc->SetDistance(dist);
                }

                sort(viewcells.begin(), viewcells.end(), nearerThan);
        }

        //mWireFrame = true;
                
        // normal rendering
        //if (!mShowPvsSizes && !mShowPiercingRays && !mShowWeightedRays && !mShowWeightedCost && !mShowComparison)
        if (mUseStandardColors)
        {
                for (i = 0; i < viewcells.size(); ++ i) 
                {
                        ViewCell *vc = viewcells[i];
                        RgbColor c;

                        //if (!mShowPvsSizes && !mShowPiercingRays)
                        c = vc->GetColor();
                        
                        glColor3f(c.r, c.g, c.b);

                        if (!mHideByCost || (mHidingCost < (vc->GetNumPiercingRays() / (float)maxPiercingRays))) 
                        {
                RenderViewCell(vc);
                        }
                }
        }
        else // using specialised colors
        {
                if (!mShowComparison)
                        AssignImportanceByRelativeValue(viewcells, maxPvs, maxPiercingRays, maxRelativeRays, maxRcCost);
                else
                {
                        if (mCompareInfo.empty())
                        {
                                LogReader reader;
                                reader.SetFilename("compare.log");
                                int samples;
                                reader.Read(samples, mCompareInfo);
                        }

                        AssignColorByComparison(viewcells, mCompareInfo);
                }

                glEnable(GL_DEPTH_TEST);        
        }
        
        glEnable(GL_CULL_FACE);
        glDisable(GL_CULL_FACE);

        glDisable(GL_CLIP_PLANE0);

        mUseFalseColors = false;
        mWireFrame = false;

        glPopAttrib();
}


void QtGlRendererWidget::AssignImportanceByRelativeValue(const ViewCellContainer &viewCells,
                                                                                                                 int &maxPvs, 
                                                                                                                 int &maxPiercingRays, 
                                                                                                                 float &maxRelativeRays, 
                                                                                                                 float &maxRcCost)
{
        for (size_t i = 0; i < viewCells.size(); ++ i) 
        {
                RgbColor c;
                ViewCell *vc = viewCells[i];

                float importance;

                if (mShowPiercingRays)
                {
                        importance = mTransferFunction *
                                ((float)vc->GetNumPiercingRays() / (float)maxPiercingRays);
                }
                else if (mShowWeightedRays) // relative number of rays
                {
                        float relativeArea = vc->GetBox().SurfaceArea() / mViewCellsManager->GetViewSpaceBox().SurfaceArea();

                        if (relativeArea < Limits::Small)
                                relativeArea = Limits::Small;

                        importance = mTransferFunction * ((float)vc->GetNumPiercingRays() / relativeArea) / maxRelativeRays;
                }
                else if (mShowPvsSizes) // pvs size
                {
                        importance = mTransferFunction *
                                ((float)vc->GetPvs().GetSize() / (float)maxPvs);
                } // weighted render cost
                else if (mShowWeightedCost)
                {
                        const float rcCost = mTransferFunction * ComputeRenderCost(vc);
                        importance = rcCost / maxRcCost;
                }
if (importance > 1.0f) importance = 1.0f;
                // c = RgbColor(importance, 1.0f - importance, 0.0f);
                c = RainbowColorMapping(importance);

                glColor4f(c.r, c.g, c.b, 1.0f - mTransparency);

                if (!mHideByCost || (mHidingCost < importance)) 
                {
                        RenderViewCell(vc);
                }
        }
}


void QtGlRendererWidget::AssignColorByComparison(const ViewCellContainer &viewcells,
                                                                                                 //const ViewCellInfoContainer &infos1, 
                                                                                                 const ViewCellInfoContainer &compareInfo)
{
        //cout << "comparing " << viewcells.size() << " view cells to " << compareInfo.size() << " values" << endl;

        if (viewcells.size() > compareInfo.size())
        {
                cerr << "loaded size (" << (int)compareInfo.size() << ") does not fit to view cells size (" << (int)viewcells.size() << ")" << endl;
                return;
        }

        //const float maxRatio = 1.0f;
        const float maxRatio = 2.0f;
        const float minRatio = 0.0f;

        const float scale = 1.0f / (maxRatio - minRatio);

        for (size_t i = 0; i < viewcells.size(); ++ i) 
        {
                RgbColor c;
                ViewCell *vc = viewcells[i];

                //ViewCellInfo vc1Info = infos1[i];
                ViewCellInfo vc2Info = compareInfo[i];

                //const float vcRatio = vc->GetNumPiercingRays() / vc2Info.mPiercingRays + Limits::Small;
                float vcRatio = 1.0f;//maxRatio;
                
                if (vc2Info.mPvsSize > Limits::Small) 
                        vcRatio = (float)vc->GetPvs().GetSize() / vc2Info.mPvsSize;

                // truncate here
                if (vcRatio > maxRatio) vcRatio = 1.0f;

                const float importance = (vcRatio - minRatio) * scale;
        
                if (0 && (i < 20))
                {
                        cout << "pvs1: " << vc->GetPvs().GetSize() << " pvs2: " << compareInfo[i].mPvsSize << " importance: " << importance << endl;
                }

                // c = RgbColor(importance, 1.0f - importance, 0.0f);
                c = RainbowColorMapping(importance);

                glColor4f(c.r, c.g, c.b, 1.0f);

                if (1)//!mHideByCost || (mHidingCost < importance)) 
                {
                        RenderViewCell(vc);
                }
        }
}



/**********************************************************************/
/*              QtRendererControlWidget implementation                */
/**********************************************************************/


QGroupBox *QtRendererControlWidget::CreateVisualizationPanel(QWidget *parent)
{
        QRadioButton *rb1, *rb2, *rb3, *rb4, *rb5;
        
        rb1 = new QRadioButton("random colors", parent);
        rb1->setText("random");
        connect(rb1, SIGNAL(toggled(bool)), SIGNAL(SetShowWireFrame(bool)));

        // Create a check box to be in the group box
        rb2 = new QRadioButton("piercing rays", parent);
        rb2->setText("piercing rays");
        //vl->addWidget(rb1);
        connect(rb2, SIGNAL(toggled(bool)), SIGNAL(SetShowPiercingRays(bool)));

        rb3 = new QRadioButton("pvs size", parent);
        rb3->setText("pvs size");
        connect(rb3, SIGNAL(toggled(bool)), SIGNAL(SetShowPvsSizes(bool)));
        
        rb4 = new QRadioButton("weighted rays", parent);
        rb4->setText("weighted rays");
        connect(rb4, SIGNAL(toggled(bool)), SIGNAL(SetShowWeightedRays(bool)));
        
        rb5 = new QRadioButton("pvs cost", parent);
        rb5->setText("pvs cost");
        connect(rb5, SIGNAL(toggled(bool)), SIGNAL(SetShowWeightedCost(bool)));

        QGroupBox *groupBox = new QGroupBox("PVS Visualization");

        QVBoxLayout *vbox2 = new QVBoxLayout;
    
        vbox2->addWidget(rb1);
        vbox2->addWidget(rb2);
        vbox2->addWidget(rb3);
        vbox2->addWidget(rb4);
        vbox2->addWidget(rb5);
        
        rb5->setChecked(true);

        vbox2->addStretch(1);
        groupBox->setLayout(vbox2);

        return groupBox;
}


QGroupBox *QtRendererControlWidget::CreateTrafoPanel(QWidget *parent)
{
        QRadioButton *rb1, *rb2, *rb3;
        
        rb1 = new QRadioButton("translation", parent);
        rb1->setText("translation");
        connect(rb1, SIGNAL(toggled(bool)), SIGNAL(SetTranslation(bool)));

        // Create a check box to be in the group box
        rb2 = new QRadioButton("scale", parent);
        rb2->setText("scale");
        //vl->addWidget(rb1);
        connect(rb2, SIGNAL(toggled(bool)), SIGNAL(SetScale(bool)));

        rb3 = new QRadioButton("rotation", parent);
        rb3->setText("rotation");
        connect(rb3, SIGNAL(toggled(bool)), SIGNAL(SetRotation(bool)));
    
        QVBoxLayout *vbox2 = new QVBoxLayout;
        QGroupBox *groupBox = new QGroupBox("Trafo types");

        vbox2->addWidget(rb1);
        vbox2->addWidget(rb2);
        vbox2->addWidget(rb3);
        
        rb1->setChecked(true);

        vbox2->addStretch(1);
        groupBox->setLayout(vbox2);

        return groupBox;
}



QGroupBox *QtRendererControlWidget::CreateRenderCostPanel(QWidget *parent)
{
        QRadioButton *rb1, *rb2, *rb3;
        
        // Create a check box to be in the group box
        rb1 = new QRadioButton("triangles", parent);
        rb1->setText("triangles");
        connect(rb1, SIGNAL(toggled(bool)), SIGNAL(SetShowWeightedTriangles(bool)));

        rb2 = new QRadioButton("distance weighted pvs", parent);
        rb2->setText("distance weighted");
        connect(rb2, SIGNAL(toggled(bool)), SIGNAL(SetShowDistanceWeightedPvs(bool)));

        rb3 = new QRadioButton("distance weighted triangles", parent);
        rb3->setText("distance weighted triangles");
        connect(rb3, SIGNAL(toggled(bool)), SIGNAL(SetShowDistanceWeightedTriangles(bool)));

        QGroupBox *groupBox = new QGroupBox("Render cost options");
        QVBoxLayout *vbox2 = new QVBoxLayout;
    
        vbox2->addWidget(rb1);
        vbox2->addWidget(rb2);
        vbox2->addWidget(rb3);
        
        rb1->setChecked(true);

        vbox2->addStretch(1);
        groupBox->setLayout(vbox2);

        return groupBox;
}


QGroupBox *QtRendererControlWidget::CreateRayVisualizationPanel(QWidget *parent)
{
        QRadioButton *rb1, *rb2, *rb3, *rb4;
        
        // Create a check box to be in the group box
        rb1 = new QRadioButton("const color", parent);
        rb1->setText("const color");
        //vl->addWidget(rb1);
        connect(rb1, SIGNAL(toggled(bool)), SIGNAL(UseConstColorForRayViz(bool)));

        rb2 = new QRadioButton("ray length", parent);
        rb2->setText("ray length");
        connect(rb2, SIGNAL(toggled(bool)), SIGNAL(UseRayLengthForRayViz(bool)));
        
        rb3 = new QRadioButton("contribution", parent);
        rb3->setText("contribution");
        connect(rb3, SIGNAL(toggled(bool)), SIGNAL(SetShowContribution(bool)));
        
        rb4 = new QRadioButton("distribution", parent);
        rb4->setText("distribution");
        connect(rb4, SIGNAL(toggled(bool)), SIGNAL(SetShowDistribution(bool)));


        ///////////////////////////

        
        QGroupBox *groupBox = new QGroupBox("Ray visualization");
        QVBoxLayout *vbox2 = new QVBoxLayout;
    
        vbox2->addWidget(rb1);
        vbox2->addWidget(rb2);
        vbox2->addWidget(rb3);
        vbox2->addWidget(rb4);
        
        rb1->setChecked(true);


        QCheckBox *cb = new QCheckBox("Distribution 1", parent);
        vbox2->addWidget(cb);
        cb->setChecked(true);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetShowDistribution1(bool)));

        cb = new QCheckBox("Distribution 2", parent);
        vbox2->addWidget(cb);
        cb->setChecked(true);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetShowDistribution2(bool)));

        cb = new QCheckBox("Distribution 3", parent);
        vbox2->addWidget(cb);
        cb->setChecked(true);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetShowDistribution3(bool)));
        
        cb = new QCheckBox("Distribution 4", parent);
        vbox2->addWidget(cb);
        cb->setChecked(true);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetShowDistribution4(bool)));


        vbox2->addStretch(1);
        groupBox->setLayout(vbox2);

        return groupBox;
}


QtRendererControlWidget::QtRendererControlWidget(QWidget * parent, Qt::WFlags f):
QWidget(parent, f)
{

        QVBoxLayout *vl = new QVBoxLayout;
        setLayout(vl);
        
        //QWidget *vbox;

        //vbox = new QGroupBox("Render Controls", this);
        //layout()->addWidget(vbox);
        //vl = new QVBoxLayout;
        //vbox->setLayout(vl);

        QLabel *label;
        QSlider *slider;
        QPushButton *button;

#if REMOVE_TEMPORARY

        label = new QLabel("Granularity");
        //vbox->layout()->addWidget(label);
        vl->addWidget(label);

        slider = new QSlider(Qt::Horizontal, vbox);
        vl->addWidget(slider);
        slider->show();
        slider->setRange(1, 10000);
        slider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        slider->setValue(200);

        connect(slider, SIGNAL(valueChanged(int)), SIGNAL(SetViewCellGranularity(int)));

        ///////////////////////////

        label = new QLabel("Transfer function");
        vl->addWidget(label);

        slider = new QSlider(Qt::Horizontal, vbox);
        vl->addWidget(slider);
        slider->show();
        slider->setRange(1, 10000);
        slider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        slider->setValue(100);


        connect(slider, SIGNAL(valueChanged(int)), SIGNAL(SetTransferFunction(int)));

        ////////////////////////////////////////7

        button = new QPushButton("Update all PVSs", vbox);
        vl->addWidget(button);
        connect(button, SIGNAL(clicked()), SLOT(UpdateAllPvs()));

        ////////////////////////////////////////77777

        label = new QLabel("Filter size");
        vl->addWidget(label);

        slider = new QSlider(Qt::Horizontal, vbox);
        vl->addWidget(slider);
        slider->show();
        slider->setRange(1, 100);
        slider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        slider->setValue(3);

        connect(slider, SIGNAL(valueChanged(int)), SIGNAL(SetVisibilityFilterSize(int)));

#endif


        
        ///////////////////////////////////


        QWidget *hbox = new QWidget();//vbox);
        vl->addWidget(hbox);
        QHBoxLayout *hlayout = new QHBoxLayout;
        hbox->setLayout(hlayout);

        QCheckBox *cb = new QCheckBox("Show viewcells", hbox);
        hlayout->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetShowViewCells(bool)));
        
        cb = new QCheckBox("Render errors", hbox);
        hlayout->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetRenderErrors(bool)));

#if REMOVE_TEMPORARY
        cb = new QCheckBox("Render cost curve", hbox);
        hlayout->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetShowRenderCost(bool)));
#endif
        cb = new QCheckBox("Show rays", hbox);
        hlayout->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetShowRays(bool)));
#if REMOVE_TEMPORARY    
        cb = new QCheckBox("Show Comparison", hbox);
        hlayout->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetShowComparison(bool)));
#endif

        //////////////////

        QHBoxLayout *vh = new QHBoxLayout;

        QGroupBox *myBox = new QGroupBox("Visualization");

        myBox->setLayout(vh);
        vl->addWidget(myBox, 0, 0);

        QGroupBox *groupBox = CreateVisualizationPanel(hbox);
        vh->addWidget(groupBox, 0, 0);
#if REMOVE_TEMPORARY
        QGroupBox *groupBox2 = CreateRenderCostPanel(hbox);
        vh->addWidget(groupBox2, 0, 0);
#endif
        QGroupBox *groupBox3 = CreateRayVisualizationPanel(hbox);
        vh->addWidget(groupBox3, 0, 0);

        QGroupBox *groupBox4 = CreateTrafoPanel(hbox);
        vh->addWidget(groupBox4, 0, 0);

        //////////////////////////////////


        /*cb = new QRadiobox("Top View", vbox);
        vl->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetTopView(bool)));
*/

        //vbox->resize(800,150);
        QWidget *vbox;

        vbox = new QGroupBox("Rendering", this);
        layout()->addWidget(vbox);

        vl = new QVBoxLayout;
        vbox->setLayout(vl);



        cb = new QCheckBox("Cut view cells", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetCutViewCells(bool)));


        slider = new QSlider(Qt::Horizontal, vbox);
        vbox->layout()->addWidget(slider);
        slider->show();
        slider->setRange(0, 1000);
        slider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        slider->setValue(1000);

        connect(slider, SIGNAL(valueChanged(int)), SIGNAL(SetSceneCut(int)));

        
        cb = new QCheckBox("Hide view cells by render cost ", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetHideByCost(bool)));

        ////////////////////////////

        const int range = 1000;

        label = new QLabel("Hide by cost");
        vbox->layout()->addWidget(label);

        // the render cost visualization
        slider = new QSlider(Qt::Horizontal, vbox);
        vbox->layout()->addWidget(slider);
        slider->show();
        slider->setRange(0, range);
        slider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        slider->setValue(0);
        connect(slider, SIGNAL(valueChanged(int)), SIGNAL(SetHidingCost(int)));

        ///////////////////////////////////////////

        cb = new QCheckBox("Top View", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetTopView(bool)));


        label = new QLabel("Top distance");
        vbox->layout()->addWidget(label);
        
        slider = new QSlider(Qt::Horizontal, vbox);
        vbox->layout()->addWidget(slider);
        slider->show();
        slider->setRange(1, 1000);
        slider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        slider->setValue(500);

        connect(slider, SIGNAL(valueChanged(int)), SIGNAL(SetTopDistance(int)));
        

        ///////////////////////////////////////////
#if REMOVE_TEMPORARY
        cb = new QCheckBox("Transparency", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetUseTransparency(bool)));

        label = new QLabel("Use transparency");
        vbox->layout()->addWidget(label);

        // the render cost visualization
        slider = new QSlider(Qt::Horizontal, vbox);
        vbox->layout()->addWidget(slider);
        slider->show();
        slider->setRange(0, range);
        slider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        slider->setValue(0);
#endif
        connect(slider, SIGNAL(valueChanged(int)), SIGNAL(SetTransparency(int)));

        //////////////////////////////

#if REMOVE_TEMPORARY
        cb = new QCheckBox("Cut scene", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetCutScene(bool)));

        cb = new QCheckBox("Render boxes", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetRenderBoxes(bool)));

        cb = new QCheckBox("Render visibility estimates", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetRenderVisibilityEstimates(bool)));
#endif

        bool tmp;
#if REMOVE_TEMPORARY

        cb = new QCheckBox("Use filter", vbox);
        vbox->layout()->addWidget(cb);
        Environment::GetSingleton()->GetBoolValue("Preprocessor.applyVisibilityFilter", tmp );
        cb->setChecked(tmp);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetUseFilter(bool)));
#endif

        cb = new QCheckBox("Use spatial filter", vbox);
        vbox->layout()->addWidget(cb);
        Environment::GetSingleton()->GetBoolValue("Preprocessor.applyVisibilitySpatialFilter",
                tmp );
        cb->setChecked(tmp);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetUseSpatialFilter(bool)));
#if REMOVE_TEMPORARY
        cb = new QCheckBox("Render filter", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(true);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(SetRenderFilter(bool)));


        /*vbox = new QGroupBox("PVS Errors", this);
        layout()->addWidget(vbox);

        vl = new QVBoxLayout;
        vbox->setLayout(vl);

        button = new QPushButton("Compute Visibility", vbox);
        vbox->layout()->addWidget(button);
        connect(button, SIGNAL(clicked()), SLOT(ComputeVisibility()));

        button = new QPushButton("Stop Computation", vbox);
        vbox->layout()->addWidget(button);
        connect(button, SIGNAL(clicked()), SLOT(StopComputation()));

        button = new QPushButton("Set Random View Point", vbox);
        vbox->layout()->addWidget(button);
        connect(button, SIGNAL(clicked()), SLOT(SetRandomViewPoint()));*/

        button = new QPushButton("Store statistics", vbox);
        vbox->layout()->addWidget(button);
        connect(button, SIGNAL(clicked()), SIGNAL(StoreStatistics()));

        button = new QPushButton("Load object", vbox);
        vbox->layout()->addWidget(button);
        connect(button, SIGNAL(clicked()), SIGNAL(LoadObject()));
#endif
        /*cb = new QCheckBox("Stats", vbox);
        vbox->layout()->addWidget(cb);
        cb->setChecked(false);
        connect(cb, SIGNAL(toggled(bool)), SIGNAL(StoreStatistics()));*/

        if (0) 
        {
                vbox = new QGroupBox("PVS Errors", this);
                layout()->addWidget(vbox);

                vl = new QVBoxLayout;
                vbox->setLayout(vl);

                mPvsErrorWidget = new QListWidget(vbox);
                vbox->layout()->addWidget(mPvsErrorWidget);

                connect(mPvsErrorWidget,
                        SIGNAL(doubleClicked(const QModelIndex &)),
                        this,
                        SLOT(PvsErrorClicked(const QModelIndex &)));

                button = new QPushButton("Next Error Frame", vbox);
                vbox->layout()->addWidget(button);
                connect(button, SIGNAL(clicked(void)), SLOT(FocusNextPvsErrorFrame(void)));
        }
        
        //connect(button, SIGNAL(clicked(void)), SLOT(StoreStatistics(void)));
        //mHidingCost = 0.1f;
//////////////////////////////////////////

        label = new QLabel("Spatial Filter size");
        vbox->layout()->addWidget(label);

        slider = new QSlider(Qt::Horizontal, vbox);
        vbox->layout()->addWidget(slider);
        slider->show();
        slider->setRange(1, 100);
        slider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
        slider->setValue(10);

        connect(slider, SIGNAL(valueChanged(int)), SIGNAL(SetSpatialFilterSize(int)));


        setWindowTitle("Preprocessor Control Widget");
        adjustSize();
}




void
QtRendererControlWidget::FocusNextPvsErrorFrame(void)
{}

void
QtRendererControlWidget::UpdatePvsErrorItem(int row,
                                                                                        GlRendererBuffer::PvsErrorEntry &pvsErrorEntry)
{

        QListWidgetItem *i = mPvsErrorWidget->item(row);
        QString s;
        s.sprintf("%5.5f", pvsErrorEntry.mError);
        if (i) {
                i->setText(s);
        } else {
                new QListWidgetItem(s, mPvsErrorWidget);
        }
        mPvsErrorWidget->update();
}




/*********************************************************************/
/*                   QtGlDebuggerWidget implementation               */
/*********************************************************************/


QtGlDebuggerWidget::QtGlDebuggerWidget(QtGlRendererBuffer *buf, QWidget *parent)
: QGLWidget(QGLFormat(QGL::SampleBuffers), parent), mRenderBuffer(buf)
{
        // create the pbuffer
        //pbuffer = new QGLPixelBuffer(QSize(512, 512), format(), this);
        timerId = startTimer(20);
        setWindowTitle(("OpenGL pbuffers"));
}


QtGlDebuggerWidget::~QtGlDebuggerWidget()
{
        mRenderBuffer->releaseFromDynamicTexture();
        glDeleteTextures(1, &dynamicTexture);

        DEL_PTR(mRenderBuffer);
}


void QtGlDebuggerWidget::initializeGL()
{
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();

        glFrustum(-1, 1, -1, 1, 10, 100);
        glTranslatef(-0.5f, -0.5f, -0.5f);
        glTranslatef(0.0f, 0.0f, -15.0f);
        glMatrixMode(GL_MODELVIEW);

        glEnable(GL_CULL_FACE);
        initCommon();
        initPbuffer();

}


void QtGlDebuggerWidget::resizeGL(int w, int h)
{
        glViewport(0, 0, w, h);
}


void QtGlDebuggerWidget::paintGL()
{
        // draw a spinning cube into the pbuffer..
        mRenderBuffer->makeCurrent();

        BeamSampleStatistics stats;
        mRenderBuffer->SampleBeamContributions(mSourceObject, mBeam, mSamples, stats);

        glFlush();

        // rendering directly to a texture is not supported on X11, unfortunately
        mRenderBuffer->updateDynamicTexture(dynamicTexture);

        // and use the pbuffer contents as a texture when rendering the
        // background and the bouncing cubes
        makeCurrent();
        glBindTexture(GL_TEXTURE_2D, dynamicTexture);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        // draw the background
        glMatrixMode(GL_MODELVIEW);
        glPushMatrix();
        glLoadIdentity();
        glMatrixMode(GL_PROJECTION);
        glPushMatrix();
        glLoadIdentity();

        glPopMatrix();
        glMatrixMode(GL_MODELVIEW);
        glPopMatrix();
}


void QtGlDebuggerWidget::initPbuffer()
{
        // set up the pbuffer context
        mRenderBuffer->makeCurrent();
        /*mRenderBuffer->InitGL();

        glViewport(0, 0, mRenderBuffer->size().width(), mRenderBuffer->size().height());
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glOrtho(-1, 1, -1, 1, -99, 99);
        glTranslatef(-0.5f, -0.5f, 0.0f);
        glMatrixMode(GL_MODELVIEW);
        glLoadIdentity();

        glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);*/

        // generate a texture that has the same size/format as the pbuffer
        dynamicTexture = mRenderBuffer->generateDynamicTexture();

        // bind the dynamic texture to the pbuffer - this is a no-op under X11
        mRenderBuffer->bindToDynamicTexture(dynamicTexture);
        makeCurrent();
}


void QtGlDebuggerWidget::initCommon()
{
        glEnable(GL_TEXTURE_2D);
        glEnable(GL_DEPTH_TEST);

        glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
}


void QtGlRendererWidget::_RenderColoredPvs()
{
        // note: could be done more efficiently using color buffers
        mPvsSize = mPvsCache.mPvs.GetSize();

        ObjectPvsIterator it = mPvsCache.mPvs.GetIterator();

        PvsData pvsData;

        while (it.HasMoreEntries())
        {
                Intersectable *object = it.Next(pvsData);

                RgbColor color;

                //float visibility = mTransferFunction*log10(entry.mData.mSumPdf + 1); // /5.0f
                // glColor3f(visibility, 0.0f, 0.0f);
                //cerr << "sumpdf: " << pvsData.mSumPdf << endl;
                if (mUseRandomColorPerPvsObject)
                {
                        KdIntersectable *kdint = static_cast<KdIntersectable *>(object);

                        if (kdint->mGenericIdx == -1)
                        {
                                kdint->mGenericIdx = (int)mColors.size();
                                mColors.push_back(RandomColor());
                        }
                        color = mColors[kdint->mGenericIdx];
                } 
                else
                {
                        color = RainbowColorMapping(mTransferFunction * log10(pvsData.mSumPdf + 1));
                }

                glColor3f(color.r, color.g, color.b);

                mUseForcedColors = true;
                RenderIntersectable(object);
                mUseForcedColors = false;
        }
}

}