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36 lines
758 B
GLSL
36 lines
758 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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mat2 rotate2d(float angle){
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return mat2(cos(angle),-sin(angle),
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sin(angle),cos(angle));
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}
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float stripes(vec2 st, float angle){
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st = rotate2d(angle) * st*10.;
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return 1.0-abs(sin(st.x*3.1415));
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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(.0);
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vec2 pos = vec2(0.5)-st;
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float t = u_time*.5;
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float r = dot(pos,pos)*4.;
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st *= 2.;
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float pattern = sin(fract(r+t)*3.1415);
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pattern = mix(stripes(st,-0.786375),stripes(st,0.786375),pattern);
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gl_FragColor = vec4( vec3(smoothstep(.4,.5,pattern)), 1.0 );
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}
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