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49 lines
1.4 KiB
GLSL
49 lines
1.4 KiB
GLSL
// Author @patriciogv ( patriciogonzalezvivo.com ) - 2015
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#ifdef GL_ES
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precision mediump float;
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#endif
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// Copyright (c) Patricio Gonzalez Vivo, 2015 - http://patriciogonzalezvivo.com/
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// I am the sole copyright owner of this Work.
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//
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// You cannot host, display, distribute or share this Work in any form,
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// including physical and digital. You cannot use this Work in any
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// commercial or non-commercial product, website or project. You cannot
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// sell this Work and you cannot mint an NFTs of it.
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// I share this Work for educational purposes, and you can link to it,
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// through an URL, proper attribution and unmodified screenshot, as part
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// of your educational material. If these conditions are too restrictive
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// please contact me and we'll definitely work it out.
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#define PI 3.14159265358979323846
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uniform vec2 u_resolution;
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uniform float u_time;
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float fillX(vec2 _st, float _pct,float _antia){
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return smoothstep( _pct-_antia, _pct, _st.x);
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}
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float fillY(vec2 _st, float _pct,float _antia){
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return smoothstep( _pct-_antia, _pct, _st.y);
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}
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vec2 mirrorTile(vec2 _st, float _zoom){
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_st *= _zoom;
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if (fract(_st.y * 0.5) > 0.5){
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_st.y = 1.0-_st.y;
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}
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return fract(_st);
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}
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void main(){
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vec2 st = gl_FragCoord.xy/u_resolution.xy;
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vec3 color = vec3(0.0);
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st = mirrorTile(st,5.0);
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color = vec3(fillY(st,0.5+sin(st.x*PI*2.0)*0.45,0.02));
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gl_FragColor = vec4( color, 1.0 );
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}
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