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34 lines
702 B
GLSL
34 lines
702 B
GLSL
// Author @patriciogv - 2015
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// http://patriciogonzalezvivo.com
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#ifdef GL_ES
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precision mediump float;
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#endif
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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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float plot(vec2 _st, float _pct){
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return smoothstep( _pct-0.01, _pct, _st.y) -
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smoothstep( _pct, _pct+0.01, _st.y);
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}
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float random (in float _x) {
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return fract(sin(_x)*43758.5453);
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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(0.0);
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float y = random(st.x*0.001+u_time);
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// color = vec3(y);
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float pct = plot(st,y);
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color = (1.0-pct)*color+pct*vec3(0.0,1.0,0.0);
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gl_FragColor = vec4(color,1.0);
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}
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