2015-03-15 15:35:14 +00:00
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// Author @patriciogv - 2015
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// http://patriciogonzalezvivo.com
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2015-03-21 13:02:43 +00:00
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2015-03-15 15:35:14 +00:00
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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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2015-04-02 17:43:22 +00:00
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uniform vec2 u_mouse;
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2015-03-15 15:35:14 +00:00
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uniform float u_time;
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float circle(in vec2 _st, in float _radius){
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vec2 l = _st-vec2(0.5);
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return 1.-smoothstep(_radius-(_radius*0.01),
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_radius+(_radius*0.01),
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dot(l,l)*4.0);
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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(circle(st,0.9));
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gl_FragColor = vec4( color, 1.0 );
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}
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