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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGPUVolumeRayCastMapper_ParallelProjectionFS.glsl
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// Parallel projection.
#version 110
uniform vec3 parallelRayDirection;
// Incremental vector in texture space (global scope)
vec3 rayDir;
// Defined in the right projection method.
void incrementalRayDirection()
{
rayDir=parallelRayDirection;
}
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