#version 120

uniform sampler2D tex;

varying vec3 vertex;
varying vec2 uv;

const int gaussRadius = 11;
const float gaussFilter[gaussRadius] = float[gaussRadius](
	0.0402,0.0623,0.0877,0.1120,0.1297,0.1362,0.1297,0.1120,0.0877,0.0623,0.0402
);

uniform vec2 scale;

void main()
{
	vec2 texCoord = uv.xy - float(int(gaussRadius/2)) * scale;
	vec3 color = vec3(0.0, 0.0, 0.0); 
	for (int i=0; i<gaussRadius; ++i) { 
		color += gaussFilter[i] * texture2D(tex, texCoord).xyz;
		texCoord += scale;
	}

  gl_FragColor = vec4(color, 1.0);
}