hack for exact extrusions of 3-sided extruded faces

Common/GmshMessage.cpp

@@ -659,15 +659,7 @@ void Msg::ExchangeOnelabParameter(const std::string &key,
   else if(fopt.count("Max")){
     ps[0].setMax(fopt["Max"][0]); ps[0].setMin(-onelab::parameter::maxNumber());
   }
-  //if(fopt.count("Step")) ps[0].setStep(fopt["Step"][0]);
-  if(fopt.count("Step")) {
-    int Step=fopt["Step"][0];
-    if (Step<=0) {
-      Step=1;
-      Error("Non positive Step for parameter '%s', set to 1", ps[0].getName().c_str());
-    }
-    ps[0].setStep(Step);
-  }
+  if(fopt.count("Step")) ps[0].setStep(fopt["Step"][0]);
   if(fopt.count("Choices")) ps[0].setChoices(fopt["Choices"]);
   if(fopt.count("Visible")) ps[0].setVisible(fopt["Visible"][0] ? true : false);
   if(copt.count("Help")) ps[0].setHelp(copt["Help"][0]);

Geo/gmshEdge.cpp

@@ -251,6 +251,12 @@ SPoint2 gmshEdge::reparamOnFace(const GFace *face, double epar,int dir) const
     for(int i = 0; i < 3; i++)
       List_Read(s->Generatrices, i, &C[i]);
 
+    // FIXME: workaround for exact extrutions
+    bool hack = false;
+    if(CTX::instance()->geom.exactExtrusion && s->Extrude &&
+       s->Extrude->geo.Mode == EXTRUDED_ENTITY && s->Typ != MSH_SURF_PLAN)
+      hack = true;
+
     double U, V;
     if (C[0]->Num == c->Num) {
       U = (epar - C[0]->ubeg) / (C[0]->uend - C[0]->ubeg) ;
@@ -270,11 +276,11 @@ SPoint2 gmshEdge::reparamOnFace(const GFace *face, double epar,int dir) const
     }
     else if (C[2]->Num == c->Num) {
       U = 1-(epar - C[2]->ubeg) / (C[2]->uend - C[2]->ubeg) ;
-      V = U;
+      V = hack ? 1 : U;
     }
     else if (C[2]->Num == -c->Num) {
       U = 1-(C[2]->uend - epar - C[2]->ubeg) / (C[2]->uend - C[2]->ubeg) ;
-      V = U;
+      V = hack ? 1 : U;
     }
     else{
       Msg::Info("Reparameterizing edge %d on face %d", c->Num, s->Num);