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%  This example demonstrates how to use multiple renderers within a
%  render window. It is a variation of the Cone.py example. Please
%  refer to that example for additional documentation.


%  Next we create an instance of vtkConeSource and set some of its
%  properties. The instance of vtkConeSource "cone" is part of a visualization
%  pipeline (it is a source process object); it produces data (output type is
%  vtkPolyData) which other filters may process.
cone = vtkConeSource();
cone.SetHeight( 3.0 );
cone.SetRadius( 1.0 );
cone.SetResolution( 10 );

%  In this example we terminate the pipeline with a mapper process object.
%  (Intermediate filters such as vtkShrinkPolyData could be inserted in
%  between the source and the mapper.)  We create an instance of
%  vtkPolyDataMapper to map the polygonal data into graphics primitives. We
%  connect the output of the cone souece to the input of this mapper.
coneMapper = vtkPolyDataMapper();

%  Create an actor to represent the cone. The actor orchestrates rendering of
%  the mapper's graphics primitives. An actor also refers to properties via a
%  vtkProperty instance, and includes an internal transformation matrix. We
%  set this actor's mapper to be coneMapper which we created above.
coneActor = vtkActor();

%  Create two renderers and assign actors to them. A renderer renders into a
%  viewport within the vtkRenderWindow. It is part or all of a window on the
%  screen and it is responsible for drawing the actors it has.  We also set
%  the background color here. In this example we are adding the same actor
%  to two different renderers; it is okay to add different actors to
%  different renderers as well.
ren1 = vtkRenderer();
ren1.SetBackground(0.1, 0.2, 0.4);
ren1.SetViewport(0.0, 0.0, 0.5, 1.0);

ren2 = vtkRenderer();
ren2.SetBackground(0.1, 0.2, 0.4);
ren2.SetViewport(0.5, 0.0, 1.0, 1.0);

%  Finally we create the render window which will show up on the screen.
%  We add our two renderers into the render window using AddRenderer. We also
%  set the size to be 600 pixels by 300.
renWin = vtkRenderWindow();
renWin.AddRenderer( ren1 );
renWin.AddRenderer( ren2 );
renWin.SetSize(600, 300);

%  Make one camera view 90 degrees 

%  Now we loop over 360 degreeees and render the cone each time.
for i = 0:360
    ren1.GetActiveCamera().Azimuth( 1 );
    ren2.GetActiveCamera().Azimuth( 1 );

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