void vrender::VectorialRender(RenderCB render_callback, void *callback_params, VRenderParams& vparams)
{
GLfloat *feedbackBuffer = NULL ;
SortMethod *sort_method = NULL ;
Exporter *exporter = NULL ;
try
{
GLint returned = -1 ;
vparams.error() = 0 ;
int nb_renders = 0 ;
vparams.progress(0.0, QGLViewer::tr("Rendering...")) ;
while(returned < 0)
{
if(feedbackBuffer != NULL)
delete[] feedbackBuffer ;
feedbackBuffer = new GLfloat[vparams.size()] ;
if(feedbackBuffer == NULL)
throw std::runtime_error("Out of memory during feedback buffer allocation.") ;
glFeedbackBuffer(vparams.size(), GL_3D_COLOR, feedbackBuffer);
glRenderMode(GL_FEEDBACK);
render_callback(callback_params);
returned = glRenderMode(GL_RENDER);
nb_renders++ ;
if(returned < 0)
vparams.size() *= 2 ;
}
#ifdef A_VOIR
if(SortMethod != EPS_DONT_SORT)
{
GLint depth_bits ;
glGetIntegerv(GL_DEPTH_BITS, &depth_bits) ;
EGALITY_EPS = 2.0/(1 << depth_bits) ;
LINE_EGALITY_EPS = 2.0/(1 << depth_bits) ;
}
#endif
if (returned > vparams.size())
vparams.size() = returned;
#ifdef _VRENDER_DEBUG
cout << "Size = " << vparams.size() << ", returned=" << returned << endl ;
#endif
// On a un beau feedback buffer tout plein de saloperies. Faut aller
// defricher tout ca. Ouaiiiis !
vector<PtrPrimitive> primitive_tab ;
ParserGL parserGL ;
parserGL.parseFeedbackBuffer(feedbackBuffer,returned,primitive_tab,vparams) ;
if(feedbackBuffer != NULL)
{
delete[] feedbackBuffer ;
feedbackBuffer = NULL ;
}
if(vparams.isEnabled(VRenderParams::OptimizeBackFaceCulling))
{
BackFaceCullingOptimizer bfopt ;
bfopt.optimize(primitive_tab,vparams) ;
}
// Lance la methode de sorting
switch(vparams.sortMethod())
{
case VRenderParams::AdvancedTopologicalSort:
case VRenderParams::TopologicalSort: {
TopologicalSortMethod *tsm = new TopologicalSortMethod() ;
tsm->setBreakCycles(vparams.sortMethod() == VRenderParams::AdvancedTopologicalSort) ;
sort_method = tsm ;
}
break ;
case VRenderParams::BSPSort:
sort_method = new BSPSortMethod() ;
break ;
case VRenderParams::NoSorting:
sort_method = new DontSortMethod() ;
break ;
default:
throw std::runtime_error("Unknown sorting method.") ;
}
sort_method->sortPrimitives(primitive_tab,vparams) ;
// Lance les optimisations. L'ordre est important.
if(vparams.isEnabled(VRenderParams::CullHiddenFaces))
{
VisibilityOptimizer vopt ;
vopt.optimize(primitive_tab,vparams) ;
}
#ifdef A_FAIRE
if(vparams.isEnabled(VRenderParams::OptimizePrimitiveSplit))
{
PrimitiveSplitOptimizer psopt ;
psopt.optimize(primitive_tab) ;
}
#endif
// Ecrit le fichier
switch(vparams.format())
{
case VRenderParams::EPS:
exporter = new EPSExporter() ;
break ;
case VRenderParams::PS:
exporter = new PSExporter() ;
break ;
case VRenderParams::XFIG:
exporter = new FIGExporter() ;
break ;
#ifdef A_FAIRE
case VRenderParams::SVG:
exporter = new SVGExporter() ;
break ;
#endif
default:
throw std::runtime_error("Sorry, this output format is not handled now. Only EPS and PS are currently supported.") ;
}
// sets background and black & white options
GLfloat viewport[4],clearColor[4],lineWidth,pointSize ;
glGetFloatv(GL_COLOR_CLEAR_VALUE, clearColor);
glGetFloatv(GL_LINE_WIDTH, &lineWidth);
glGetFloatv(GL_POINT_SIZE, &pointSize);
glGetFloatv(GL_VIEWPORT, viewport);
lineWidth /= (float)max(viewport[2] - viewport[0],viewport[3]-viewport[1]) ;
// Sets which bounding box to use.
if(vparams.isEnabled(VRenderParams::TightenBoundingBox))
exporter->setBoundingBox(parserGL.xmin(),parserGL.ymin(),parserGL.xmax(),parserGL.ymax()) ;
else
exporter->setBoundingBox(viewport[0],viewport[1],viewport[0]+viewport[2],viewport[1]+viewport[3]) ;
exporter->setBlackAndWhite(vparams.isEnabled(VRenderParams::RenderBlackAndWhite)) ;
exporter->setClearBackground(vparams.isEnabled(VRenderParams::AddBackground)) ;
exporter->setClearColor(clearColor[0],clearColor[1],clearColor[2]) ;
exporter->exportToFile(vparams.filename(),primitive_tab,vparams) ;
// deletes primitives
for(unsigned int i=0; i<primitive_tab.size(); ++i)
delete primitive_tab[i] ;
if(exporter != NULL) delete exporter ;
if(sort_method != NULL) delete sort_method ;
}
catch(exception& e)
{
cout << "Render aborted: " << e.what() << endl ;
if(exporter != NULL) delete exporter ;
if(sort_method != NULL) delete sort_method ;
if(feedbackBuffer != NULL) delete[] feedbackBuffer ;
throw e ;
}
}
