nuclear@0: uniform sampler2D tex;
nuclear@0: uniform float left_offs, right_offs;
nuclear@0: 
nuclear@0: void main()
nuclear@0: {
nuclear@0: 	vec2 tc_half = gl_TexCoord[0].st * vec2(0.5, 1.0);
nuclear@0: 	vec2 tc_left = tc_half + vec2(left_offs, 0.0);
nuclear@0: 	vec2 tc_right = tc_half + vec2(right_offs, 0.0);
nuclear@0: 	
nuclear@0: 	vec3 left = texture2D(tex, tc_left).rgb;
nuclear@0: 	vec3 right = texture2D(tex, tc_right).rgb;
nuclear@0: 
nuclear@0: 
nuclear@0: 
nuclear@0: 	vec3 col;
nuclear@0: 	col.r = (left.r + left.g + left.b) / 3.0;
nuclear@0: 	col.g = 0.0;
nuclear@0: 	col.b = (right.r + right.g + right.b) / 3.0;
nuclear@0: 
nuclear@0: 	gl_FragColor = vec4(col, 1.0);
nuclear@0: }