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42 lines
1.3 KiB
GLSL
42 lines
1.3 KiB
GLSL
// Author @patriciogv - 2015 - patricio.io
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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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const float PI = 3.1415926535897932384626433832795;
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uniform vec2 u_resolution;
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uniform vec2 u_mouse;
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uniform float u_time;
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mat2 rotate2d(float angle){
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return mat2(cos(angle),-sin(angle),
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sin(angle),cos(angle));
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}
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float stripes(vec2 st){
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st = rotate2d( PI*-0.25 ) * st*10.;
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return step(.5,1.0-smoothstep(.3,1.,abs(sin(st.x*PI))));
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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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st.x *= u_resolution.x/u_resolution.y;
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vec3 color = vec3(stripes(st));
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gl_FragColor = vec4(color, 1.0);
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}
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