project polyline on mesh and create edge

src/Mod/Surface/Gui/Command.cpp

@@ -180,10 +180,45 @@ void CmdSurfaceGeomFillSurface::activated(int iMsg)
     doCommand(Doc, "Gui.ActiveDocument.setEdit('%s',0)", FeatName.c_str());
 }
 
+
+DEF_STD_CMD_A(CmdSurfaceCurveOnMesh)
+
+CmdSurfaceCurveOnMesh::CmdSurfaceCurveOnMesh()
+  : Command("Surface_CurveOnMesh")
+{
+    sAppModule    = "MeshPart";
+    sGroup        = QT_TR_NOOP("Surface");
+    sMenuText     = QT_TR_NOOP("Curve on mesh...");
+    sToolTipText  = QT_TR_NOOP("Curve on mesh");
+    sWhatsThis    = "Surface_CurveOnMesh";
+    sStatusTip    = sToolTipText;
+}
+
+void CmdSurfaceCurveOnMesh::activated(int)
+{
+    doCommand(Doc,"import MeshPartGui, FreeCADGui\n"
+                  "FreeCADGui.runCommand('MeshPart_CurveOnMesh')\n");
+}
+
+bool CmdSurfaceCurveOnMesh::isActive(void)
+{
+    if (Gui::Control().activeDialog())
+        return false;
+
+    // Check for the selected mesh feature (all Mesh types)
+    Base::Type meshType = Base::Type::fromName("Mesh::Feature");
+    App::Document* doc = App::GetApplication().getActiveDocument();
+    if (doc && doc->countObjectsOfType(meshType) > 0)
+        return true;
+
+    return false;
+}
+
 void CreateSurfaceCommands(void)
 {
     Gui::CommandManager &rcCmdMgr = Gui::Application::Instance->commandManager();
 /*  rcCmdMgr.addCommand(new CmdSurfaceFilling());
     rcCmdMgr.addCommand(new CmdSurfaceCut());*/
     rcCmdMgr.addCommand(new CmdSurfaceGeomFillSurface());
+    rcCmdMgr.addCommand(new CmdSurfaceCurveOnMesh());
 }

src/Mod/Surface/Gui/SurfaceFilling.cpp

@@ -146,7 +146,7 @@ void ViewProviderGeomFillSurface::highlightReferences(bool on)
 
                     for (auto jt : it.second) {
                         std::size_t idx = static_cast<std::size_t>(std::stoi(jt.substr(4)) - 1);
-                        assert (idx >= 0 && idx < colors.size());
+                        assert (idx < colors.size());
                         colors[idx] = App::Color(1.0,0.0,1.0); // magenta
                     }
 

src/Mod/Surface/Gui/Workbench.cpp

@@ -52,7 +52,8 @@ Gui::MenuItem* Workbench::setupMenuBar() const
     Gui::MenuItem* surface = new Gui::MenuItem;
     root->insertItem( item, surface );
     surface->setCommand("Surface");
-    *surface << "Surface_GeomFillSurface";
+    *surface << "Surface_CurveOnMesh"
+             << "Surface_GeomFillSurface";
 /*    *surface << "Surface_Filling";
     *surface << "Surface_Cut";*/