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//--------------------------------------------------------------------------------------
// Order Independent Transparency Vertex Shader
//
// Author: Louis Bavoil
// Email: sdkfeedback@nvidia.com
//
// Copyright (c) NVIDIA Corporation. All rights reserved.
//--------------------------------------------------------------------------------------
vec3 ShadeVertex()
{
float diffuse = abs(normalize(gl_NormalMatrix * gl_Normal).z);
return vec3(gl_Vertex.xy, diffuse);
}
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