- vtkProp3D* vtkactor=bbGetInputIn();
-// vtkactor->GetProperty()->SetOpacity( bbGetInputOpacity() );
+ vtkProp3D* vtkprop3D=bbGetInputIn();
+
+
+ std::string className = vtkprop3D->GetClassName();
+ std::string wantedClass = "vtkOpenGLActor";
+ if(className == wantedClass)
+ {
+ ((vtkActor*)vtkprop3D)->GetProperty()->SetOpacity( bbGetInputOpacity() );
+ }