bgfx/examples/14-shadowvolumes/fs_shadowvolume_svfronttex2.sc

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/*
* Copyright 2013 Dario Manesku. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#include "../common/common.sh"
vec4 stencilColor(float _k)
{
return vec4(float(abs(_k - 1.0) < 0.0001)/255.0
, float(abs(_k + 1.0) < 0.0001)/255.0
, float(abs(_k - 2.0) < 0.0001)/255.0
, float(abs(_k + 2.0) < 0.0001)/255.0
);
}
void main()
{
float k = -2.0;
if (gl_FrontFacing)
k = -k;
gl_FragColor = stencilColor(k);
}