Creating a new view from mesh with a Plugin...

Plugin/NewView.cpp

+// Gmsh - Copyright (C) 1997-2012 C. Geuzaine, J.-F. Remacle
+//
+// See the LICENSE.txt file for license information. Please report all
+// bugs and problems to <gmsh@geuz.org>.
+//
+// Contributor(s):
+//   Ruth Sabariego  & Francois Henrotte
+//
+
+
+#include "NewView.h"
+#include "GModel.h"
+#include "MElement.h"
+
+StringXNumber NewViewOptions_Number[] = {
+  {GMSH_FULLRC, "View", NULL, -1.}
+};
+
+extern "C"
+{
+  GMSH_Plugin *GMSH_RegisterNewViewPlugin()
+  {
+    return new GMSH_NewViewPlugin();
+  }
+}
+
+std::string GMSH_NewViewPlugin::getHelp() const
+{
+  return "Plugin(NewView) creates a new view from a mesh." ;
+}
+
+int GMSH_NewViewPlugin::getNbOptions() const
+{
+  return sizeof(NewViewOptions_Number) / sizeof(StringXNumber);
+}
+
+StringXNumber *GMSH_NewViewPlugin::getOption(int iopt)
+{
+  return &NewViewOptions_Number[iopt];
+}
+
+PView *GMSH_NewViewPlugin::execute(PView * v)
+{
+  if(GModel::current()->getMeshStatus() < 1){
+    Msg::Error("No mesh available to create the view: please mesh your model!");
+    return v ;
+  }
+  std::map<int, std::vector<double> > d;
+  std::vector<GEntity*> entities;
+  GModel::current()->getEntities(entities);
+  for(unsigned int i = 0; i < entities.size(); i++){
+    for(unsigned int j = 0; j < entities[i]->mesh_vertices.size(); j++){
+      MVertex *ve = entities[i]->mesh_vertices[j];
+      d[ve->getNum()].push_back(0.);
+    }
+  }
+
+  PView *vn = new PView("New view", "NodeData", GModel::current(), d);
+  return vn ;
+}

Plugin/NewView.h

+// Gmsh - Copyright (C) 1997-2012 C. Geuzaine, J.-F. Remacle
+//
+// See the LICENSE.txt file for license information. Please report all
+// bugs and problems to <gmsh@geuz.org>.
+
+#ifndef _NEWVIEW_H_
+#define _NEWVIEW_H_
+
+#include "Plugin.h"
+
+extern "C"
+{
+  GMSH_Plugin *GMSH_RegisterNewViewPlugin();
+}
+
+class GMSH_NewViewPlugin : public GMSH_PostPlugin
+{
+ public:
+  GMSH_NewViewPlugin(){}
+  std::string getName() const { return "NewView"; }
+  std::string getShortHelp() const
+  {
+    return "Create an empty New View from a mesh";
+  }
+  std::string getHelp() const;
+  int getNbOptions() const;
+  StringXNumber *getOption(int iopt);  
+  PView *execute(PView *);
+};
+
+#endif