26 lines
No EOL
827 B
HLSL
26 lines
No EOL
827 B
HLSL
/*
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contributors: Patricio Gonzalez Vivo
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description: make some hexagonal tiles. XY provide coordenates of the tile. While Z provides the distance to the center of the tile
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use: <float4> hexTile(<float2> st)
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license:
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- Copyright (c) 2021 Patricio Gonzalez Vivo under Prosperity License - https://prosperitylicense.com/versions/3.0.0
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- Copyright (c) 2021 Patricio Gonzalez Vivo under Patron License - https://lygia.xyz/license
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*/
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#ifndef FNC_HEXTILE
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#define FNC_HEXTILE
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float4 hexTile(float2 st) {
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float2 s = float2(1., 1.7320508);
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float2 o = float2(.5, 1.);
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st = st.yx;
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float4 i = floor(float4(st,st-o)/s.xyxy)+.5;
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float4 f = float4(st-i.xy*s, st-(i.zw+.5)*s);
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return dot(f.xy,f.xy) < dot(f.zw,f.zw) ?
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float4(f.yx+.5, i.xy):
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float4(f.wz+.5, i.zw+o);
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}
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#endif |