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slembcke/gist:1449811

Created December 9, 2011 02:15
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fwidth() AA
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gistfile1.c
#extension GL_OES_standard_derivatives : enable
varying lowp vec4 frag_color;
varying lowp vec2 frag_texcoord;
void main()
{
#if GL_OES_standard_derivatives == 1
gl_FragColor = frag_color*smoothstep(0.0, length(fwidth(frag_texcoord)), 1.0 - length(frag_texcoord));
#else
gl_FragColor = frag_color;
#endif
}
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