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40 lines
1.2 KiB
GLSL
40 lines
1.2 KiB
GLSL
#ifdef GL_ES
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precision mediump float;
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#endif
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#define TWO_PI 6.28318530718
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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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// rotation transformation matrix
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mat2 rotationMatrix( float angle)
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{
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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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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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float d = 1.0;
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// Remap the space to -1. to 1.
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st = (st *2.-1. );
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// Remap the coordinates with rotation using transformation matrix
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st = st * rotationMatrix(u_time/1.5);
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// Create secondary set of coordinates rotated in opposing direction
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vec2 st2 = st * rotationMatrix(u_time * -2.);
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// Make the distance field - composite the different formulars together
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d = length( abs(st2)- sin(u_time+ 0.5) +0.9 );
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d *= 1. - length( 1. - max(abs(st)-sin(u_time/1.),0.) ) ;
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d *= length( min(abs(st2)- sin((u_time/ 4.)), sin(u_time / 10. + 0.1)) );
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// Visualize the distance field
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gl_FragColor = vec4( clamp (fract(d* abs(sin(u_time/ 4.)) ), 0.6, 0.1) , clamp(fract(d* abs(log(u_time/10.)) ), 0.9, 1.), clamp ( 1. -abs(cos(u_time)), 0.5, 1. ), fract(d* abs(sin(u_time/ 4.)) ));
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} |