77 lines
2.3 KiB
GLSL
77 lines
2.3 KiB
GLSL
#extension GL_OES_standard_derivatives : enable
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#ifdef GL_ES
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precision highp float;
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#endif
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uniform float time;
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uniform vec2 mouse;
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uniform vec2 resolution;
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const float PI = 3.141592653589793;
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const float PI2 = PI* 2.;
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#define saturate(x) clamp(x,0.,1.)
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float tri(float x){return abs(2.*fract(x*.5-.25)-1.)*2.-1.;}
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float sqr(float x){return -2.*(step(.5,fract(x*.5))-.5);}
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float circuit(float x){return clamp(tri(x*4.)*.25,(sqr(x)-1.)*.5,(sqr(x+.5)+1.)*.5);}
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float circuit2(float x){return clamp(tri(x*.5)*.5,0.,.25);}
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float flow(float x,float d){return (1.+sin(x+d*time*5.+3.))*.3+.3;}
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vec2 pp(vec2 p){float r=.5/p.y;return vec2(p.x*r, r);}
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void main(void){
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float t=floor(time * 0.8 *30.)/15.;
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vec2 p = ( gl_FragCoord.xy - resolution.xy*.5 ) / resolution.x;
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vec2 p2 = p;
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vec3 color;
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vec3 light_color = vec3(1,0.6,1.0);
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float k = mix(fract(-p.y), 1.0, step(0., -p.y));
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if (p.y > 10.0) {
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} else {
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float l=0.,d=sign(p.y);
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vec2 r = p;
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vec2 q = p;
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q=pp(q);
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float n = floor(q.x/.5);
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q.x=mod(q.x,.5)-.25;
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p=pp(p);
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l+=step(abs(q.x+circuit(q.y+sign(p.y)*t+n)),.005);
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l+=pow(.001/abs(p.x+circuit(p.y+d*t)),flow(p.y,d));
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l+=pow(.001/abs(p.x+.75+circuit2(p.y+d*t)),(1.+sin(p.y+d*time*5.))*.3+.3);
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l+=pow(.001/abs(p.x-.75+circuit2(p.y+d*t)),(1.+sin(p.y+d*time*5.))*.3+.3);
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l=saturate(l);
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l*=abs(r.y*2.);
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l*=abs(sin(r.y*200.+sign(p.y)*time*5.))*.5+.5;
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l+=pow(.001/abs(p.x+circuit(p.x+d*time)),(1.+sin(p.x+d*time*5.+3.))*.3+.3);
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//l+=pow(.001/abs(p.x+circuit(p.x+d*time + 0.3)),(1.+sin(p.x+d*time*5.+3.))*.3+.3);
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color = vec3(l) - vec3(.2, .4, 0.);
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color *= k;
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}
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float angle = atan(p2.y,p2.x)/(2.*3.14159265359);
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angle -= floor(angle);
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float rad = length(p2);
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float c = 0.1;
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float brightness = 0.012;
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float speed = 0.8;
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for (int i = 0; i < 1; ++i){
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float angleRnd = floor(angle*14.)+1.;
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float angleRnd1 = fract(angleRnd*fract(angleRnd*.7235)*45.1);
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float angleRnd2 = fract(angleRnd*fract(angleRnd*.82657)*13.724);
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float t = t*speed + angleRnd1*10.;
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float radDist = sqrt(angleRnd2+float(i));
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float adist = radDist/rad*.1;
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float dist = (t*.1+adist);
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dist = abs(fract(dist)-.5);
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c += (1.0 / (dist))*cos(0.7*(sin(t)))*adist/radDist * brightness;
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}
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angle = fract(angle+.161);
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gl_FragColor = vec4(color + vec3(c) * light_color, 1.0);
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}
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