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/*=========================================================================
Program: Visualization Toolkit
Module: vtkGPUVolumeRayCastMapper_AdditiveNoCroppingFS.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.
=========================================================================*/
// Implementation of some functions used by the Additive method when cropping
// is off.
#version 110
float initialValue()
{
return 0.0;
}
void writeColorAndSumScalar(vec4 color,
float sumValue)
{
// we don't need to write sumValue to a buffer when there is no cropping.
// color framebuffer
gl_FragColor=color;
}
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