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Usage
vtkRenderPass is a deferred class with a simple deferred
method Render. This method performs a rendering pass of the
scene described in vtkRenderState. Subclasses define what
really happens during rendering.
Directions to write a subclass of vtkRenderPass: It is up to
the subclass to decide if it needs to delegate part of its
job to some other vtkRenderPass objects ("delegates").
* The subclass has to define ivar to set/get its delegates.
* The documentation of the subclass has to describe:
o what each delegate is supposed to perform
o if a delegate is supposed to be used once or multiple
times
o what it expects to have in the framebuffer before
starting (status of colorbuffers, depth buffer, stencil
buffer)
o what it will change in the framebuffer.
* A pass cannot modify the vtkRenderState where it will
perform but it can build a new vtkRenderState (it can
change the FrameBuffer, change the prop array, changed the
required prop properties keys (usually adding some to a
copy of the existing list) but it has to keep the same
vtkRenderer object), make it current and pass it to its
delegate.
* at the end of the execution of Render, the pass has to
ensure the current vtkRenderState is the one it has in
argument.
To create an instance of class vtkRenderPass, simply invoke
its constructor as follows
obj = vtkRenderPass
Methods
The class vtkRenderPass has several methods that can be
used. They are listed below. Note that the documentation is
translated automatically from the VTK sources, and may not
be completely intelligible. When in doubt, consult the VTK
website. In the methods listed below, obj is an instance of
the vtkRenderPass class.
* string = obj.GetClassName ()
* int = obj.IsA (string name)
* vtkRenderPass = obj.NewInstance ()
* vtkRenderPass = obj.SafeDownCast (vtkObject o)
* int = obj.GetNumberOfRenderedProps () - Number of props
rendered at the last Render call.
* obj.ReleaseGraphicsResources (vtkWindow w) - Release
graphics resources and ask components to release their own
resources. Default implementation is empty.
Precondition:
w_exists: w!=0
* FreeMat_Documentation
* Visualization_Toolkit_Rendering_Classes
* Generated on Thu Jul 25 2013 17:18:35 for FreeMat by
doxygen_ 1.8.1.1
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