projection faces are persistent and should never be deleted

Fltk/GUI_Projection.cpp

@@ -265,6 +265,13 @@ void browse_cb(Fl_Widget *w, void *data)
   
   projection *p = e->getCurrentProjection();
   if(p){
+    if(!GMODEL->faceByTag(p->face->tag())){
+      // the projection face is not in the model: add it and reset all
+      // selections
+      GMODEL->add(p->face);
+      e->getEntities().clear();
+      e->getElements().clear();
+    }
     p->face->setVisibility(true);
     p->group->show();
   }
@@ -577,25 +584,17 @@ void mesh_parameterize_cb(Fl_Widget* w, void* data)
   // display geometry surfaces
   opt_geometry_surfaces(0, GMSH_SET | GMSH_GUI, 1);
 
-  // create one instance of each available projection surface
+  // create the (static) editor
+  static projectionEditor *editor = 0;
+  if(!editor){
     std::vector<FProjectionFace*> faces;
-  if(faces.empty()){
     int tag = GMODEL->numFace();
     faces.push_back(new FProjectionFace(GMODEL, ++tag, 
 					new CylindricalProjectionSurface(tag)));
     faces.push_back(new FProjectionFace(GMODEL, ++tag,
 					new RevolvedParabolaProjectionSurface(tag)));
+    editor = new projectionEditor(faces);
   }
-
-  // make each projection surface invisible and 
-  for(unsigned int i = 0; i < faces.size(); i++){
-    faces[i]->setVisibility(false);
-    GMODEL->add(faces[i]);
-  }
- 
-  // launch editor
-  static projectionEditor *editor = 0;
-  if(!editor) editor = new projectionEditor(faces);
   editor->show();
 }
 

Geo/GModel.cpp

-// $Id: GModel.cpp,v 1.42 2007-05-23 15:35:33 geuzaine Exp $
+// $Id: GModel.cpp,v 1.43 2007-08-03 14:57:09 geuzaine Exp $
 //
 // Copyright (C) 1997-2007 C. Geuzaine, J.-F. Remacle
 //
@@ -30,8 +30,11 @@ void GModel::destroy()
   for(riter it = firstRegion(); it != lastRegion(); ++it)
     delete *it;
   regions.clear();
-  for(fiter it = firstFace(); it != lastFace(); ++it)
+  for(fiter it = firstFace(); it != lastFace(); ++it){
+    // projection faces are persistent and should never be deleted
+    if((*it)->geomType() != GEntity::ProjectionFace)
       delete *it;
+  }
   faces.clear();
   for(eiter it = firstEdge(); it != lastEdge(); ++it)
     delete *it;

contrib/FourierModel/Makefile

@@ -49,3 +49,39 @@ depend:
 	rm -f Makefile.new
 
 # DO NOT DELETE THIS LINE
+ProjectionSurface.o: ProjectionSurface.cpp ProjectionSurface.h
+CylindricalProjectionSurface.o: CylindricalProjectionSurface.cpp \
+  CylindricalProjectionSurface.h ProjectionSurface.h
+RevolvedParabolaProjectionSurface.o:  \
+ RevolvedParabolaProjectionSurface.cpp \
+  RevolvedParabolaProjectionSurface.h Utils.h ProjectionSurface.h
+Patch.o: Patch.cpp Patch.h ProjectionSurface.h
+FPatch.o: FPatch.cpp Message.h FPatch.h Patch.h ProjectionSurface.h \
+  PartitionOfUnity.h
+ContinuationPatch.o: ContinuationPatch.cpp Message.h ContinuationPatch.h \
+  Patch.h ProjectionSurface.h FM_Info.h PartitionOfUnity.h \
+  Interpolator1D.h
+ExactPatch.o: ExactPatch.cpp Message.h ExactPatch.h Patch.h \
+  ProjectionSurface.h FM_Info.h
+Curve.o: Curve.cpp Curve.h
+FCurve.o: FCurve.cpp FCurve.h Curve.h Patch.h ProjectionSurface.h
+IntersectionCurve.o: IntersectionCurve.cpp Message.h IntersectionCurve.h \
+  Curve.h Patch.h ProjectionSurface.h FM_Info.h
+BlendedPatch.o: BlendedPatch.cpp BlendedPatch.h Message.h Patch.h \
+  ProjectionSurface.h BlendOperator.h FM_Info.h PartitionOfUnity.h
+BlendOperator.o: BlendOperator.cpp BlendOperator.h FM_Info.h Patch.h \
+  ProjectionSurface.h
+FM_Edge.o: FM_Edge.cpp FM_Edge.h Curve.h FM_Vertex.h Message.h
+FM_Face.o: FM_Face.cpp FM_Face.h Patch.h ProjectionSurface.h FM_Edge.h \
+  Curve.h FM_Vertex.h Message.h
+FM_Info.o: FM_Info.cpp FM_Info.h
+FM_Reader.o: FM_Reader.cpp Message.h FM_Reader.h Curve.h \
+  IntersectionCurve.h Patch.h ProjectionSurface.h FM_Info.h ExactPatch.h \
+  ContinuationPatch.h PartitionOfUnity.h Interpolator1D.h \
+  CylindricalProjectionSurface.h RevolvedParabolaProjectionSurface.h \
+  Utils.h FM_Face.h FM_Edge.h FM_Vertex.h BlendOperator.h BlendedPatch.h
+FM_Vertex.o: FM_Vertex.cpp
+Message.o: Message.cpp Message.h
+Utils.o: Utils.cpp Utils.h Message.h
+PartitionOfUnity.o: PartitionOfUnity.cpp PartitionOfUnity.h
+Interpolator1D.o: Interpolator1D.cpp Interpolator1D.h Message.h