Shader for generating procedural bricks 0.0) { spec = max(dot(reflectVec, viewVec), 0.0); spec = pow(spec, 16.0); } lightintensity = kd * diffuse + ks * spec; modelpos = gl_Vertex.xy; gl_Position = ftransform(); } ]]> 0.5) position.x += 0.5; position = fract(position); useBrick = step(position, brickpct); color = mix(mortarcolor, brickcolor, useBrick.x * useBrick.y); color *= lightintensity; gl_FragColor = vec4 (color, 1.0); } ]]>