mirror of
https://github.com/patriciogonzalezvivo/thebookofshaders
synced 2024-11-09 19:10:24 +00:00
43 lines
1.1 KiB
GLSL
43 lines
1.1 KiB
GLSL
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// By Udit Mahajan ( uditmahajan.com / @mahajan_udit )
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// For Shader Studio Course https://github.com/patriciogonzalezvivo/ss2015
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// Clockwork Orange
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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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vec2 pos = vec2(0.3, 0.5)-st;
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vec2 pos2 = vec2(0.3, 0.5)-st;
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float r = length(pos)*2.0*(2.);
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float a = atan(pos.y,pos.x)+u_time;
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float r2 = length(pos2)*4.0;
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float a2 = atan(pos2.y,pos2.x);
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float f = cos(a*8.);
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// float f2 = cos(a2);
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// f = abs(cos(a*3.));
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// f = abs(cos(a*2.5))*.5+.3;
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// f = abs(cos(a*12.)*sin(a*3.))*.8+.1;
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f = smoothstep(-.5,1., cos(a*15.))*0.2+0.5;
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color = vec3( (1.-smoothstep(f,f+0.02,r))/1.,(1.-smoothstep(f,f+0.02,r))/1.,(1.-smoothstep(f,f+0.02,r) )/1.);
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color += vec3(.01, 0.5, 0.9);
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// color += vec3(step(.2,r2)/1.,step(.2,r2)/3.,step(.2,r2)/3.);
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color -= vec3(2.*(smoothstep(.2,.22,r2)/1.-smoothstep(.3,.32,r2)/1.));
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// color *= (vec3(step(.2,r2)/1.));
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gl_FragColor = vec4(1.-color, 1.0);
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}
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