blending

gistfile1.txt

vec4 diffuseColor()
{
#ifdef SOLID
		float non_mipped = bitValue(v_flags, 3) * -4.0;
		vec4 a = texture2D(u_textures, v_texcoord_0, non_mipped);

		float cutout = bitValue(v_flags, 4);
		if(cutout == 1.0 && a.a < 0.5)
			discard;
#else
		vec4 a = texture2D(u_textures, v_texcoord_0);
#endif

	vec4 shade = shadeColor(v_color_0, 0);

	a *= shade;


#if LAYER_COUNT > 1
	vec4 b = texture2D(u_textures, v_texcoord_1) * shadeColor(v_color_1, 1);
	a = mix(a, b, b.a);
#endif

#if LAYER_COUNT > 2
	vec4 c = texture2D(u_textures, v_texcoord_2) * shadeColor(v_color_2, 2);
	a = mix(a, c, c.a);
#endif

	return a;
}