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52 lines
1.3 KiB
GLSL
52 lines
1.3 KiB
GLSL
// By Jaskirat Randhawa ( http://jaskirat.me/ )
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// For Shader Studio Course https://github.com/patriciogonzalezvivo/ss2015
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#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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vec3 circle ( float posX, float posY, float rad, vec3 color){
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vec2 st = gl_FragCoord.xy/u_resolution;
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// st -=.5;
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st.x -=posX;
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st.y -=posY;
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float pct = 1. - length(st)*2.*rad;
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// rad = 1./rad;
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// pct = fract(pct*1.);
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pct = step(.997,pct);
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color = vec3(pct)*color;
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return color;
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}
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void main(){
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vec3 color = vec3(0.0);
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vec3 color1 = vec3(.5,.8,.1);
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vec3 color2 = vec3(.9,.4,.4);
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vec3 color3 = vec3(.2,.8,.8);
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vec3 c1= vec3(0);
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for(float i = 0.; i<20. ; i++){
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c1 += circle( sin(.4*i*u_time/2.),cos(.3*i*u_time),.1,color1);
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c1 += circle( sin(.2*i*u_time),cos(.1*i),.1,color2);
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c1 += circle( sin(.2*i*u_time/2.),cos(.6*i*u_time/2.),.1,color3);
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}
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// c1 = circle( .5,.5,.1,color1);
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// c1 += circle( .2,.5,.1,color2);
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// c1 += circle( .5,.4,.1,color3);
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// c1 += circle( sin(u_time)/2.+.5, cos(u_time)/2.+.5,1.1);
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// c1 += circle( sin(u_time+5.)/2.+.5, cos(u_time+5.)/2.+.5,1.1);
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// color = vec3(c1);
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// color *= color1;
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gl_FragColor = vec4(c1,1.0);
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} |