mirror of
https://github.com/patriciogonzalezvivo/thebookofshaders
synced 2024-11-08 01:10:27 +00:00
27 lines
529 B
GLSL
27 lines
529 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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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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// Right & Bottom
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vec2 rgBt = step(vec2(0.1),st);
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float pct = rgBt.x * rgBt.y;
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// Left & top
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// vec2 lfTp = step(vec2(0.1),1.0-st);
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// pct *= lfTp.x * lfTp.y;
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color = vec3(pct);
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gl_FragColor = vec4(color,1.0);
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} |