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25 lines
471 B
GLSL
25 lines
471 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 rect(in vec2 st, in vec2 size){
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size = 0.25-size*0.25;
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vec2 uv = smoothstep(size,size+size*vec2(0.002),st*(1.0-st));
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return uv.x*uv.y;
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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( rect(st, vec2(0.9) ) );
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gl_FragColor = vec4(color,1.0);
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}
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