/usr/share/gem/examples/10.glsl/interpol.frag is in gem-doc 1:0.93.3-7.
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1 2 3 4 5 6 7 8 9 10 11 12 13 | // Cyrille Henry 2008
#extension GL_ARB_texture_rectangle : enable
uniform sampler2DRect texture_mass;
uniform float init;
void main (void)
{
vec2 coord = gl_TexCoord[0].st/2.;
vec4 pos = texture2DRect(texture_mass, coord);
gl_FragColor = pos;
}
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