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ABOUT THIS DEMO-APPLICATION: GL Post Processing
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This application demonstrates the use of osgCompute/osgCuda
within the scene graph. First, the scene is rendered to a
texture (see createPreRenderSubGraph) and then post-processed
by a computation (which applies either a gauss or a sobel
filter). The resulting image is then transferred back to
the GL context and is displayed by a screen aligned quad.


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Important programs/libraries:
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cmake (Cmake: http://www.cmake.org/)
Current official version: 2.6.4

osg (OpenSceneGraph: http://www.openscenegraph.org/)
Current official version: 2.8.2
SVN-Version is recommended!


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CMakeModules
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This application uses some of the cmake module scripts in Resources (http://www.cg.informatik.uni-siegen.de/svt/res/).
Please note that some environment variables may be necessary to compile the application correctly.


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Important environment variable: OSGCOMPUTEDIR
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The cmake scripts located in CMakeModules/osgcompute look for the environment variable OSGCOMPUTEDIR.
Ensure that this variable points to the root directory of your installed osgCompute version.


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Important environment variable: COMPUTEDEMOAPP_FILE_PATH (not needed yet)
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If the examples are built which need some data please ensure that the data is available .
Set the environment variable COMPUTEDEMOAPP_FILE_PATH to the folder which contains the application data (e.g. C:\ComputeDemoApp-Data).

Please add COMPUTEDEMOAPP_FILE_PATH to OSG_FILE_PATH. This ensures that OSG is able to load the necessary data successfully
(e.g. OSG_FILE_PATH = C:\SDK\OpenSceneGraph-Data;C:\SDK\OpenSceneGraph-Data\Images;%COMPUTEDEMOAPP_FILE_PATH%).

