VRender.cpp
Go to the documentation of this file.
00001 /*
00002  This file is part of the VRender library.
00003  Copyright (C) 2005 Cyril Soler (Cyril.Soler@imag.fr)
00004  Version 1.0.0, released on June 27, 2005.
00005 
00006  http://artis.imag.fr/Members/Cyril.Soler/VRender
00007 
00008  VRender is free software; you can redistribute it and/or modify
00009  it under the terms of the GNU General Public License as published by
00010  the Free Software Foundation; either version 2 of the License, or
00011  (at your option) any later version.
00012 
00013  VRender is distributed in the hope that it will be useful,
00014  but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016  GNU General Public License for more details.
00017 
00018  You should have received a copy of the GNU General Public License
00019  along with VRender; if not, write to the Free Software Foundation, Inc.,
00020  51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
00021 */
00022 
00023 /****************************************************************************
00024 
00025  Copyright (C) 2002-2013 Gilles Debunne. All rights reserved.
00026 
00027  This file is part of the QGLViewer library version 2.4.0.
00028 
00029  http://www.libqglviewer.com - contact@libqglviewer.com
00030 
00031  This file may be used under the terms of the GNU General Public License 
00032  versions 2.0 or 3.0 as published by the Free Software Foundation and
00033  appearing in the LICENSE file included in the packaging of this file.
00034  In addition, as a special exception, Gilles Debunne gives you certain 
00035  additional rights, described in the file GPL_EXCEPTION in this package.
00036 
00037  libQGLViewer uses dual licensing. Commercial/proprietary software must
00038  purchase a libQGLViewer Commercial License.
00039 
00040  This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00041  WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00042 
00043 *****************************************************************************/
00044 
00045 #ifdef WIN32
00046 # include <windows.h>
00047 #endif
00048 
00049 #ifdef __APPLE__
00050 # include <OpenGL/gl.h>
00051 #else
00052 # include <GL/gl.h>
00053 #endif
00054 
00055 #include <stdio.h>
00056 #include <vector>
00057 #include <stdlib.h>
00058 #include <string.h>
00059 
00060 #include "VRender.h"
00061 #include "ParserGL.h"
00062 #include "Exporter.h"
00063 #include "SortMethod.h"
00064 #include "Optimizer.h"
00065 
00066 using namespace vrender ;
00067 using namespace std ;
00068 
00069 void vrender::VectorialRender(RenderCB render_callback, void *callback_params, VRenderParams& vparams)
00070 {
00071         GLfloat *feedbackBuffer = NULL ;
00072         SortMethod *sort_method = NULL ;
00073         Exporter *exporter = NULL ;
00074 
00075         try
00076         {
00077                 GLint returned = -1 ;
00078 
00079                 vparams.error() = 0 ;
00080 
00081                 int nb_renders = 0 ;
00082 
00083                 vparams.progress(0.0, QGLViewer::tr("Rendering...")) ;
00084 
00085                 while(returned < 0)
00086                 {
00087                         if(feedbackBuffer != NULL)
00088                                 delete[] feedbackBuffer ;
00089 
00090                         feedbackBuffer = new GLfloat[vparams.size()] ;
00091 
00092                         if(feedbackBuffer == NULL)
00093                                 throw std::runtime_error("Out of memory during feedback buffer allocation.") ;
00094 
00095                         glFeedbackBuffer(vparams.size(), GL_3D_COLOR, feedbackBuffer);
00096                         glRenderMode(GL_FEEDBACK);
00097                         render_callback(callback_params);
00098                         returned = glRenderMode(GL_RENDER);
00099 
00100                         nb_renders++ ;
00101 
00102                         if(returned < 0)
00103                                 vparams.size() *= 2 ;
00104                 }
00105 
00106 #ifdef A_VOIR
00107                 if(SortMethod != EPS_DONT_SORT)
00108                 {
00109                         GLint depth_bits ;
00110                         glGetIntegerv(GL_DEPTH_BITS, &depth_bits) ;
00111 
00112                         EGALITY_EPS             = 2.0/(1 << depth_bits) ;
00113                         LINE_EGALITY_EPS        = 2.0/(1 << depth_bits) ;
00114                 }
00115 #endif
00116                 if (returned > vparams.size())
00117                         vparams.size() = returned;
00118 #ifdef _VRENDER_DEBUG
00119                 cout << "Size = " << vparams.size() << ", returned=" << returned << endl ;
00120 #endif
00121 
00122                 //  On a un beau feedback buffer tout plein de saloperies. Faut aller
00123                 // defricher tout ca. Ouaiiiis !
00124 
00125                 vector<PtrPrimitive> primitive_tab ;
00126 
00127                 ParserGL parserGL ;
00128                 parserGL.parseFeedbackBuffer(feedbackBuffer,returned,primitive_tab,vparams) ;
00129 
00130                 if(feedbackBuffer != NULL)
00131                 {
00132                         delete[] feedbackBuffer ;
00133                         feedbackBuffer = NULL ;
00134                 }
00135 
00136                 if(vparams.isEnabled(VRenderParams::OptimizeBackFaceCulling))
00137                 {
00138                         BackFaceCullingOptimizer bfopt ;
00139                         bfopt.optimize(primitive_tab,vparams) ;
00140                 }
00141 
00142                 // Lance la methode de sorting
00143 
00144                 switch(vparams.sortMethod())
00145                 {
00146                 case VRenderParams::AdvancedTopologicalSort:
00147                 case VRenderParams::TopologicalSort: {
00148                         TopologicalSortMethod *tsm = new TopologicalSortMethod() ;
00149                         tsm->setBreakCycles(vparams.sortMethod() == VRenderParams::AdvancedTopologicalSort) ;
00150                         sort_method = tsm ;
00151                                                                                          }
00152                                                                                          break ;
00153 
00154                 case VRenderParams::BSPSort:                            sort_method = new BSPSortMethod() ;
00155                         break ;
00156 
00157                 case VRenderParams::NoSorting:                  sort_method = new DontSortMethod() ;
00158                         break ;
00159                 default:
00160                         throw std::runtime_error("Unknown sorting method.") ;
00161                 }
00162 
00163                 sort_method->sortPrimitives(primitive_tab,vparams) ;
00164 
00165                 // Lance les optimisations. L'ordre est important.
00166 
00167                 if(vparams.isEnabled(VRenderParams::CullHiddenFaces))
00168                 {
00169                         VisibilityOptimizer vopt ;
00170                         vopt.optimize(primitive_tab,vparams) ;
00171                 }
00172 
00173 #ifdef A_FAIRE
00174                 if(vparams.isEnabled(VRenderParams::OptimizePrimitiveSplit))
00175                 {
00176                         PrimitiveSplitOptimizer psopt ;
00177                         psopt.optimize(primitive_tab) ;
00178                 }
00179 #endif
00180                 // Ecrit le fichier
00181 
00182                 switch(vparams.format())
00183                 {
00184                 case VRenderParams::EPS: exporter = new EPSExporter() ;
00185                         break ;
00186                 case VRenderParams::PS:  exporter = new PSExporter() ;
00187                         break ;
00188                 case VRenderParams::XFIG:exporter = new FIGExporter() ;
00189                         break ;
00190 #ifdef A_FAIRE
00191                 case VRenderParams::SVG: exporter = new SVGExporter() ;
00192                         break ;
00193 #endif
00194                 default:
00195                         throw std::runtime_error("Sorry, this output format is not handled now. Only EPS and PS are currently supported.") ;
00196                 }
00197 
00198                 // sets background and black & white options
00199 
00200                 GLfloat viewport[4],clearColor[4],lineWidth,pointSize ;
00201 
00202                 glGetFloatv(GL_COLOR_CLEAR_VALUE, clearColor);
00203                 glGetFloatv(GL_LINE_WIDTH, &lineWidth);
00204                 glGetFloatv(GL_POINT_SIZE, &pointSize);
00205                 glGetFloatv(GL_VIEWPORT, viewport);
00206 
00207                 lineWidth /= (float)max(viewport[2] - viewport[0],viewport[3]-viewport[1]) ;
00208 
00209                 // Sets which bounding box to use.
00210 
00211                 if(vparams.isEnabled(VRenderParams::TightenBoundingBox))
00212                         exporter->setBoundingBox(parserGL.xmin(),parserGL.ymin(),parserGL.xmax(),parserGL.ymax()) ;
00213                 else
00214                         exporter->setBoundingBox(viewport[0],viewport[1],viewport[0]+viewport[2],viewport[1]+viewport[3]) ;
00215 
00216                 exporter->setBlackAndWhite(vparams.isEnabled(VRenderParams::RenderBlackAndWhite)) ;
00217                 exporter->setClearBackground(vparams.isEnabled(VRenderParams::AddBackground)) ;
00218                 exporter->setClearColor(clearColor[0],clearColor[1],clearColor[2]) ;
00219 
00220                 exporter->exportToFile(vparams.filename(),primitive_tab,vparams) ;
00221 
00222                 // deletes primitives
00223 
00224                 for(unsigned int i=0;i<primitive_tab.size();++i)
00225                         delete primitive_tab[i] ;
00226 
00227                 if(exporter != NULL) delete exporter ;
00228                 if(sort_method != NULL) delete sort_method ;
00229         }
00230         catch(exception& e)
00231         {
00232                 cout << "Render aborted: " << e.what() << endl ;
00233 
00234                 if(exporter != NULL) delete exporter ;
00235                 if(sort_method != NULL) delete sort_method ;
00236                 if(feedbackBuffer != NULL) delete[] feedbackBuffer ;
00237 
00238                 throw e ;
00239         }
00240 }
00241 
00242 VRenderParams::VRenderParams()
00243 {
00244         _options = 0 ;
00245         _format = EPS ;
00246         _filename = "" ;
00247         _progress_function = NULL ;
00248         _sortMethod = BSPSort ;
00249 }
00250 
00251 VRenderParams::~VRenderParams()
00252 {}
00253 
00254 
00255 void VRenderParams::progress(float f, const QString& progress_string)
00256 {
00257         _progress_function(f,progress_string) ;
00258 }
00259 
00260 void VRenderParams::setFilename(const QString& filename)
00261 {
00262         _filename = filename;
00263 }
00264 
00265 void VRenderParams::setOption(VRenderOption opt,bool b)
00266 {
00267         if(b)
00268                 _options |= opt ;
00269         else
00270                 _options &= ~opt ;
00271 }
00272 
00273 bool VRenderParams::isEnabled(VRenderOption opt)
00274 {
00275         return (_options & opt) > 0 ;
00276 }


octovis
Author(s): Kai M. Wurm , Armin Hornung
autogenerated on Thu Aug 27 2015 14:13:26