[vtkusers] Plane Widget and OpenGL ES

[Lonni Besançon]

Sorry for the late reply, here is my code:

  /foo->plane = vtkSmartPointer<vtkPlane>::New();
  foo->clipper = vtkSmartPointer<vtkClipPolyData>::New();
  foo->clipper->SetClipFunction(foo->plane);
  foo->clipper->InsideOutOn();

  foo->reader = vtkSmartPointer<vtkXMLPolyDataReader>::New() ;
  foo->reader->SetFileName(filename.c_str()) ;
  foo->clipper->SetInputConnection(foo->reader->GetOutputPort()) ;

  // Create a mapper and actor
  vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
  mapper->SetInputConnection(foo->clipper->GetOutputPort());
  vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
  actor->SetMapper(mapper);
 
  vtkSmartPointer<vtkProperty> backFaces =
vtkSmartPointer<vtkProperty>::New();
  backFaces->SetDiffuseColor(.8, .8, .4);
  foo->mainActor->SetBackfaceProperty(backFaces);
 
  // The callback will do the work of updating the view
  vtkSmartPointer<vtkIPWCallback> myCallback =
vtkSmartPointer<vtkIPWCallback>::New();
  myCallback->Plane = foo->plane;
  myCallback->Actor = foo->mainActor;

 
  foo->planerep = vtkSmartPointer<vtkImplicitPlaneRepresentation>::New();
  foo->planerep->SetPlaceFactor(1.25); // This must be set prior to placing
the widget
  foo->planerep->PlaceWidget(foo->mainActor->GetBounds());
  foo->planerep->SetNormal(foo->plane->GetNormal());
  //planerep->SetNormal(0,1,0);
  foo->planerep->SetOrigin(0,0,50); //this doesn't seem to work?
 
  foo->planeWidget = vtkSmartPointer<vtkImplicitPlaneWidget2>::New();
  foo->planeWidget->SetInteractor(foo->Interactor);
  foo->planeWidget->SetRepresentation(foo->planerep);
  foo->planeWidget->AddObserver(vtkCommand::InteractionEvent,myCallback);


  foo->Renderer->AddActor(actor); 
  foo->planeWidget->On();/

As for the callback (probably not needed) but here it is:
class vtkIPWCallback : public vtkCommand
{
public:
  static vtkIPWCallback *New() 
  { 
    return new vtkIPWCallback;
  }
  virtual void Execute(vtkObject *caller, unsigned long, void*)
  {
    vtkImplicitPlaneWidget2 *planeWidget =
reinterpret_cast<vtkImplicitPlaneWidget2*>(caller);
    vtkImplicitPlaneRepresentation *rep =
reinterpret_cast<vtkImplicitPlaneRepresentation*>(planeWidget->GetRepresentation());
    rep->GetPlane(this->Plane);
  }
  vtkIPWCallback():Plane(0),Actor(0) {}
  vtkPlane *Plane;
  vtkActor *Actor;
 
};

I guess it should work because I have seen some running program with the
cutting plane. Unfortunately can't get my hands on the code to check what
may be wrong with mine.

Thanks again for the help



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