Dweets awesomed by u/Run

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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    u(t) is called 60 times per second.
    t: Elapsed time in seconds.
    S: Shorthand for Math.sin.
    C: Shorthand for Math.cos.
    T: Shorthand for Math.tan.
    R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5)
    c: A 1920x1080 canvas.
    x: A 2D context for that canvas.

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iverjo

remix of d/334 by u/iverjo

function u(t) {

c.width=960;for(i=20;i--;)for(j=12;j--;)x.fillRect(50*i-9*S(A=4*t+i*C(t/8)*.6+j*S(t/8)*.4),50*j+9*C(A),W=25+C(A)/.3,W),x.fill()

Jan 14 2017 4:18 PM UTC

}// 127/140

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finninde

function u(t) {

c.width=400;for(i=0;i<32;i++){x.fillRect(15,i*23,(i*256),0.5*S(t)*i*3)
x.fillRect(i*30,20, S(t)*i*3,(i*256))}

Jan 14 2017 4:18 PM UTC

}// 109/140

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cristea

function u(t) {

c.width=2e3;for(i=20;i--;){i%2?b=i:b=20-i;x.fillStyle='#e29';x.fillRect(i*99,9*(b*9)*C(t)+500,50*S(t),200*S(t))}

Jan 14 2017 4:16 PM UTC

}// 112/140

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ose

function u(t) {

for(i=0;i<20;i++){
x.fillStyle=R(S(i*t)*255,S(i+1+t)*255,S(i+2+t)*255);
x.fillRect(i*150+100*S(t),(t*50),50,150);
}

Jan 14 2017 4:08 PM UTC

}// 115/140

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Psychedelic sneks

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iverjo

remix of d/143 by u/chunnoo

function u(t) {

c.width=1920;for(i=-2;i<2;i+=.05)for(j=-4;j<4;j+=.05)a=i*j-3*T(t),1/(j*j+i*i)+1/(a*a+i*i)>1&&x.fillRect(j*240+960,i*240+540,12,12)

Jan 14 2017 3:44 PM UTC

}// 130/140

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Let the dweetoff begin!

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Run

function u(t) {

c.width=1920;for(i=0;i<1257-1256*C(t/5);i++){x.fillRect(960+500*S((i+t)/25),540+500*C((i+t)/16),10,10)}

Jan 14 2017 3:35 PM UTC

}// 103/140

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ocasta181

remix of d/133 by u/lionleaf

function u(t) {

c.width=2e3;x.translate(980,450);for(i=0;i<392;)x.fillStyle=R(i,0,S(t)*190),x.rotate(!i*C(t-=.01)+!(i++%4)*S(t)|t),x.fillRect(5*i,5/t,i*t,i)

Jun 20 2016 10:01 PM UTC

}// 140/140

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icecuber

function u(t) {

t?i++:i=0;for(j=1080;j--;){a=b=0;k=35;for(;k--&&a*a+b*b<4;)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1,a=c;x.fillRect(i,j,1,S(k/9))}

Apr 13 2016 1:46 PM UTC

}// 122/140

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u/iverjo

115 bytes: for(j=1080;j--;a=b=0){for(k=35;k--&&a*a+b*b<4;a=y)y=a*a-b*b+t*60/540-2,b=2*a*b+j/540-1;x.fillRect(t*60,j,1,S(k/9))}
u/iverjo

Here's one that draws faster: for(i=4;i--;){for(j=1080;j--;a=b=0){for(k=35;k--&&a*a+b*b<4;a=y,l=t*240+i)y=a*a-b*b+l/540-2,b=2*a*b+j/540-1;x.fillRect(l,j,1,S(k/9))}}
u/iverjo

Nvm, they depend on various variables being defined. I was fooled.
u/myJS

How about colors? t?i++:i=0;for(j=1080;j--;){a=b=0;k=35;for(;k--&&a*a+b*b<4;)c=a*a-b*b+i/540-2,b=2*a*b+j/540-1,a=c;x.fillStyle=R(k,j,i);x.fillRect(i,j,1,S(k/9))}
u/sfz

Nice enhancement myJS!
u/lionleaf

#scanline #slow_render #fractal #fractals

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