nuclear@0: varying vec3 vpos, norm;
nuclear@0: varying vec2 texcoord;
nuclear@0: 
nuclear@0: void main()
nuclear@0: {
nuclear@0: 	vec3 n = normalize(norm);
nuclear@0: 	vec3 ldir = normalize(vec3(-0.5, 0.5, 2));
nuclear@0: 
nuclear@0: 	float ndotl = max(dot(n, ldir), 0.0);
nuclear@0: 
nuclear@0: 	vec3 color = vec3(0.8, 0.8, 0.8) * ndotl;
nuclear@0: 
nuclear@0: 	float hpat = smoothstep(0.49, 0.5, mod(texcoord.x * 8.0, 1.0));
nuclear@0: 	float vpat = smoothstep(0.49, 0.5, mod(texcoord.y * 8.0, 1.0));
nuclear@0: 
nuclear@0: 	float pattern = 0.0;
nuclear@0: 	if((hpat > 0.5 && vpat > 0.5) || (hpat < 0.5 && vpat < 0.5)) {
nuclear@0: 		pattern = 1.0;
nuclear@0: 	} else {
nuclear@0: 		pattern = 0.0;
nuclear@0: 	}
nuclear@0: 
nuclear@0: 	vec3 tex = vec3(pattern * 0.5 + 0.5);
nuclear@0: 
nuclear@0: 
nuclear@0: 	gl_FragColor.rgb = color * tex;
nuclear@0: 	gl_FragColor.a = 1.0;
nuclear@0: }