2017-09-30 11:23:14 +02:00
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vec2 map( vec3 pos )
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{
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2017-09-30 12:08:18 +02:00
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vec3 q = pos;
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q.xy = mod( q.xy + 2. , 4. ) - 2.;
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2017-09-30 17:58:48 +02:00
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return vec2( length( q ) - 1.8 , step( 0. , 1.9 - length( pos.xy ) ) );
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2017-09-30 11:23:14 +02:00
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}
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