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28 lines
503 B
GLSL
28 lines
503 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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// bottom-left
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vec2 bl = step(vec2(0.1),st);
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float pct = bl.x * bl.y;
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// top-right
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// vec2 tr = step(vec2(0.1),1.0-st);
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// pct *= tr.x * tr.y;
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color = vec3(pct);
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gl_FragColor = vec4(color,1.0);
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}
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