43 lines
No EOL
1.2 KiB
GLSL
43 lines
No EOL
1.2 KiB
GLSL
#include "../math/const.glsl"
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#include "rotate.glsl"
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#include "sqTile.glsl"
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/*
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contributors: Patricio Gonzalez Vivo
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description: 'Rotate tiles (in a squared grid pattern) by 45 degrees'
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use:
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- <vec4> windmillTile(<vec4> tiles[, <float> fullturn = TAU])
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- <vec2> windmillTile(<vec2> st [, <float|vec2> scale])
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examples:
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- https://raw.githubusercontent.com/patriciogonzalezvivo/lygia_examples/main/draw_tiles.frag
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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_WINDMILLTILE
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#define FNC_WINDMILLTILE
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vec4 windmillTile(vec4 t, float turn) {
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float a = ( abs(mod(t.z, 2.0)-
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mod(t.w, 2.0))+
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mod(t.w, 2.0) * 2.0)*
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0.25;
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return vec4(rotate(t.xy, a * turn), t.zw);
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}
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vec4 windmillTile(vec4 t) {
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return windmillTile(t, TAU);
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}
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vec4 windmillTile(vec2 v) {
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return windmillTile(sqTile(v));
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}
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vec4 windmillTile(vec2 v, float s) {
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return windmillTile(v * s);
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}
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vec4 windmillTile(vec2 v, vec2 s) {
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return windmillTile(v * s);
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}
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#endif |