Random dweets | Dwitter

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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hscells

function u(t) {

[33,0].map(function(i){G=i*255;x.fillStyle=R(G+C(t)*255,G,G+S(t)*255);x.fillRect(99*C(t+i)*8+800,99*S(t+i)*2+540,260+C(t+i)*99,-S(t+i)*99)})

May 29 2017 8:55 AM UTC

}// 140/140

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katkip

remix of d/9552 by u/katkip

function u(t) {

c.width=100;p=0;for(i=0;i<100;i++)for(j=0;j<100;j++)x.fillStyle=`hsl(${C(i)*C(j)*p*t/26},99%,50%)`,x.fillRect(i,j,1,1),p++

Aug 30 2018 9:37 AM UTC

}// 122/140

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1n^3 8 #fractal

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coderkid

function u(t) {

f=frame;if(f%1e3<1){reset();r=Math.random;c.x=r()*9;c.y=r()*9};x.moveTo(960,540);x.lineTo(C(f)*2e3*(c.x||2),S(f)*1e3*(c.y||2));x.stroke();

Dec 31 2017 6:48 PM UTC

}// 138/140

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Niklas

function u(t) {

c.width|=0;
				cH=c.height/2;h=cH/2;
				for(i=0;i<c.width;i++){
					y=cH+S(i*t/10)*h;
					x.lineTo(i,y);
				}
				x.stroke();

Feb 22 2017 3:59 PM UTC

}// 130/140

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unts-unts-unts-unts

function u(t) {

c.width|=0
x.translate(960,540)
for(i=120;i--;){
x.fillStyle=R(i*3,128*S(t),5*i)
x.rotate(t/30)
x.fillRect(-13*i,-13*i,26*i,26*i)}

Feb 5 2018 7:20 PM UTC

}// 130/140

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atgz

remix of d/24891 by u/rodrigo.siqueira

function u(t) {

with(x)for(i=999;i--;fillRect(~setTransform(s=6e4/i,0,0,s,999+7*s*C(F=i),360+i+3*s*S(F+S(t+i)/3)),~rotate(i/5),2,2))fillStyle=R(i*t/3.1%111)

Feb 14 2022 10:16 AM UTC

}// 140/140

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katkip

remix of d/3194 by u/lurifax

function u(t) {

for(i=2e3;i--;x.fillStyle=R(T(t)*99,i/t,C(i)*128+128,.07))x.fillRect(960+S(p=i/314)*(d=99+T(C(t/i))*(S(i*9+t)*99)*C(t)*4),540+C(p)*d,9,9)

Sep 8 2018 7:54 PM UTC

}// 137/140

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Nuclear core

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LePhenix47

function u(t) {

for(i=0;i<2e3;x.fillStyle=`hsl(${i++},99%,50%`)x.fillRect(960+Math.cos(i/99)*400,540+Math.sin(i/99)*400,50,50);

Jun 14 2023 4:20 AM UTC

}// 111/140

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Colorful circle

u/Xen

welcome to the facebook family!
u/Xen

slight golf as an example: for(i=2e3;i--;x.fillStyle=hsl(${i},99%,50%)x.fillRect(960+C(i/99)*400,540+S(i/99)*400,50,50);

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Jezza

function u(t) {

t||(X=Y=u=.9)
for(i=999;i--;)T=.4-6/(1+X*X+Y*Y),Z=X,X=1+u*(Z*C(T)-Y*S(T)),Y=u*(Z*S(T)+Y*C(T)),x.fillRect(X*500+600,Y*350+750,.9,.9)

Apr 26 2019 7:31 AM UTC

}// 132/140

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https://en.wikipedia.org/wiki/Ikeda_map

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rodrigo.siqueira

remix of d/29115 by u/baon

function u(t) {

for(t?Y++:Y=0,X=3e3;X--;x.fillRect(X,Y,1,f(X/2e3-.6,Y/1500)))f=(x,y,n=0)=>y?f(x*x-y*y,S(x*y)*4+.5,n+1):C(n/3-t/3)/2+.5

Dec 14 2023 8:41 PM UTC

}// 118/140

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Superspiral #fractal

u/tomxor

Gnarly!