if a curve is "discrete" but has no BDS representation, don't draw anything
in the geometry routine: we draw the elements in the mesh routine.

Graphics/Geom.cpp

-// $Id: Geom.cpp,v 1.85 2005-06-27 15:03:45 remacle Exp $
+// $Id: Geom.cpp,v 1.86 2005-06-27 19:33:00 geuzaine Exp $
 //
 // Copyright (C) 1997-2005 C. Geuzaine, J.-F. Remacle
 //
@@ -151,12 +151,10 @@ void Draw_Curve(void *a, void *b)
       break;
     }
     if(c->Typ == MSH_SEGM_DISCRETE && c->bds) {
-
       BDS_GeomEntity *g = c->bds->get_geom ( c->Num,1);	
       std::list<BDS_Edge*>::iterator it  = g->e.begin();
       std::list<BDS_Edge*>::iterator ite = g->e.end();
-	    while (it!=ite)
-	    {
+      while (it!=ite){
 	BDS_Edge *e = (*it);
 	glBegin(GL_LINES);
 	glVertex3d(e->p1->X,e->p1->Y,e->p1->Z);
@@ -165,6 +163,9 @@ void Draw_Curve(void *a, void *b)
 	++it;
       }
     }
+    else if(c->Typ == MSH_SEGM_DISCRETE) {
+      // do nothing: we draw the elements in the mesh drawing routines
+    }
     else {
       if(CTX.geom.line_type >= 1) {
 	for(int i = 0; i < N - 1; i++) {
@@ -332,8 +333,7 @@ void Draw_Polygonal_Surface(Surface * s)
     BDS_GeomEntity *g = s->bds->get_geom ( s->Num,2);	
     std::list<BDS_Triangle*>::iterator it  = g->t.begin();
     std::list<BDS_Triangle*>::iterator ite = g->t.end();
-	while (it!=ite)
-	{
+    while (it!=ite) {
       glBegin(GL_TRIANGLES);
       BDS_Point *n[3];
       BDS_Triangle *t = (*it);
@@ -618,7 +618,7 @@ void Draw_Surface(void *a, void *b)
     Draw_Polygonal_Surface(s);
   }
   else if(s->Typ == MSH_SURF_DISCRETE){
-	// do nothing
+    // do nothing: we draw the elements in the mesh drawing routines
   }
   else if(s->Typ == MSH_SURF_PLAN){
     Draw_Plane_Surface(s);