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/* Simple color classification shader.
*
*/
#extension GL_ARB_texture_rectangle : enable
uniform float minintensity;
uniform float maxintensity;
uniform float minratio;
uniform sampler2DRect Image;
void main(void)
{
vec3 incolor = texture2DRect(Image, gl_TexCoord[0].st).rgb;
float accepted = step(incolor.r * minratio, incolor.g);
accepted = accepted * step(minintensity, incolor.g);
accepted = accepted * step(incolor.g, maxintensity);
gl_FragColor.rgba = vec4(accepted);
}
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