[vtkusers] pipeline

[Tim Soper]

Not a vtk expert, but typically you have trigger the change through a call to Modified(). This is my "unofficial" non-expert understanding. You'd have to do something like the following:


vtkCustomPolyDataAlgorithm* custom;
custom->Modified( );

This should let the pipeline know that there is an explicit change forcing it to call RequestData( );
Render( ) assumes graphics need to be updated( ie mappers, renderers, etc), but not the data sources (readers, polydataalgorithms, etc. )

-Tim-







----- Original Message ----
From: Yaroslav Tenzer <krakadil.gena at gmail.com>
To: vtkusers at vtk.org
Sent: Friday, September 19, 2008 9:52:11 AM
Subject: [vtkusers] pipeline


Hello,
 
Can you help please .. I am lost ....
 
In my application, after the method render() is called, the screen is redrawn and the objects do change position on the screen (based on the hardware inputs), but RequestData method of a custom class based on vtkPolyDataAlgorithm is not invoked.... it seems that the pipeline is not fully executed ... 
 
the algorithm class is located between the reader and the mapper ...
 
When I call the Render() on RendererWindow, it should execute all the pipeline, shouldnot it ?
How can I debug the the pipeline execution ?
 
I am trying to develop a haptic system in C++ environment with QT+VTK ... 
For the collision detection I am trying to use the vtkCollisionDetectionFilter by Goodwin Lawlor
 
Maybe you are also aware of an open source haptic system implementation based on vtk ? 
 
Thank you !
yaroslav
 
www.yaroslavtenzer.com


      
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