demotool/shaders/map.glsl

#define USE_GLOW
#define USE_MAP_MATERIAL

T_BPMaterial BPMaterials[1] = {
	{ vec3( 1 , 1 , 0 ) , vec3( 1 ) , 4 , .3 }
};

T_PBRMaterial PBRMaterials[1] = {
	{
		// Albedo / specular colors
		vec3( 1 , 1 , 0 ) , vec3( 1 , 1 , .4 ) ,
		// Roughness , anisotropy , subsurface , metallic
		.1 , 0 , 0 , .75
	}
};

vec3 Glow[1] = {
	vec3( 5. , .1 , 4. )
};

void mapMaterial(
		in int matIndex ,
		out int type ,
		out int tIndex ,
		out int glowIndex )
{
	if ( matIndex == 0 ) {
		type = 0;
	} else {
		type = 1;
	}
	tIndex = 0;
	glowIndex = -1;
}

vec2 map( vec3 pos )
{
	vec3 q = pos;
	q.xy = mod( q.xy + 4. , 8. ) - 4.;
	return vec2( length( q ) - 1.8 , step( 0. , 1.9 - length( pos.xy ) ) );
}