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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vinca

function u(t) {

for(c.width|=X=a=2e3,x[r="fillRect"](0,0,a,a),x.fillStyle="#3C1";X--;)x[r](X,540+99*S(1/T(X/1e4-t)),1,5);for(i=99;i--;)x[r](0,12*i,2e3,C(t))

May 4 2019 5:29 AM UTC

}// 140/140

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DirtyDan

function u(t) {

a=S(t)*6.5
c.width+=0
for(i=0;i<47;i++)
x.font=i*5+'px A',x.fillText("👌",400*S(a*i/47)+960-i*2,400*C(a*i/47)+630)

Feb 19 2018 6:27 AM UTC

}// 113/140

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Sort of did Snoop Dogg's thing by accident

u/aleamb

nice!
u/sigveseb

Lol :)
u/prplz

👌/10
u/iverjo

lol prplz ^^

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rsc

remix of d/29634 by u/rodrigo.siqueira

function u(t) {

c.width=1920;for(i=0;i<9;i++)for(j=0;j<9;j++){x.fillStyle=`hsl(${i*20+t*88},${(j+1)*15}%,50%)`;x.fillRect(i*213,(j-1)*213,213,213)}

Mar 17 2024 8:17 PM UTC

}// 131/140

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Remixed because the grey first row somehow triggered me

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Pascal

remix of d/21662 by u/Pascal

function u(t) {

for(c.width|=0,i=144;i--;x.fill(x.arc((X=i%16)*120+60,(i-X)*7.5+60,(.5+C(t-3.14)/2)*(7*C(i*i+t*2)+S(i*i/5+t))**2,0,7)))x.beginPath()

Feb 23 2021 4:49 PM UTC

}// 132/140

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circles

u/DaSpider

126... with(x)for(c.width|=i=144;i--;fill(arc((X=i%16)*120+60,(i-X)*7+60,(.5+C(t-3)/2)*(7*C(i*i+t*2)+S(i*i/5+t))**2,0,7)))beginPath()
u/danny@hille.dk

121: for(c.width|=i=144;i--;)x.beginPath(x.fill(x.arc((X=i%16)*120+60,(i-X)*7+60,(.5+C(t)/2)*(7*C(i*i+t*2)+S(i*i+t))**2,0,7)))
u/danny@hille.dk

112:for(c.width|=i=144;i--;)x.beginPath(x.fill(x.arc((X=i%16)*120+60,(i-X)*7+60,(.5+C(t)/2)*(7*C(i*i+t*2))**2,0,7)))
u/danny@hille.dk

last +S(i*i+t) didn't do much

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ciaccodavide

function u(t) {

for(c.width|=0,z=(g=1920)/9,i=g;i--;)a=z+z*S(t)/3,x.fillRect(960+S(i+i)*a*C(t+i),540+C(i+t)*a,10,10);

Oct 20 2020 5:26 PM UTC

}// 101/140

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u/Xen

welcome to dwitter!
u/ciaccodavide

Thanks! :)

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rodrigo.siqueira

remix of d/11140 by u/jylikangas

function u(t) {

c.width^=0
for(0,X=i=840;i--;)x.fillRect(i*3,X,3,S(i*6.3-t)*57-150)
x.font='2in"';x.fillText('✈',t*40,N=70*S(t)+510),x.fillText('🏎️',N,960)

Nov 25 2018 2:13 PM UTC

}// 139/140

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Airplane flying, car and mountains

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AArt1256

function u(t) {

for(c.width=I=64;I--;)for(J=36;J--;)x.fillRect(I,J,(((J*C(t)+I*S(t)+C(t/2)*50)/10)&3)/4,(((I*C(t)-J*S(t)+S(t/2)*100)/10)&3)/4)

Aug 31 2023 8:17 PM UTC

}// 126/140

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a rotozoomer type thing

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rodrigo.siqueira

remix of d/36123 by u/rodrigo.siqueira

function u(t) {

x.translate(2e3,0)
with(x)for(i=13;i--;c.style.filter=`invert(`)for(j=9;j--;)beginPath(),arc(i**3/t,0,9,0,7),fill(),scale(.9994,1),rotate(7)

Aug 17 2026 3:53 PM UTC

}// 140/140

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Stardust spiral #spiral

u/PotatoImaginator

#galaxy

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pavel

function u(t) {

for(c.width|=p=300;e=p--**.9%1;x.fillRect(960+r(0)/z,200+99/z,s=9*e/z,s))r=d=>p/(1+e*C(a=t/4+p))*C(a+p+d)+2*p/(1/e-e)*C(p+d),z=.5+r(1.6)/800

Feb 28 2019 6:54 AM UTC

}// 140/140

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Galaxy

u/pavel

300 bodies which individually only interact with an infinite mass at the center
u/pavel

Each body moves around an ellipse, the orbits are accurate. However, the movement speed is a very rough approximation.
u/pavel

Naively drawing an ellipse centers it around one of the focal points, however moving a body on this path slows the body down near this focal point and speeds it up near the other one.
u/pavel

The opposite effect is needed. So this code still moves a body around an ellipse but it re-centers the ellipse on the 'other' focal point.
u/pavel

In polar coordinates the difference between the x and y coordinates is a phase shift of pi/2 ~ 1.6

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rodrigo.siqueira

remix of d/11562 by u/echo85

function u(t) {

for(I=1e3;I--;){for(X=I/250-3,Y=t/2-1.5,T=12;T=T-1;)U=X,X=X*X-Y*Y+I/250-3,Y=2*U*Y+t/2-1.5
X>1&&(x.fillRect(I*1.6,t*180,3,3))}

Jun 10 2019 3:01 AM UTC

}// 125/140

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Mandelbrot set with different border #mandelbrot #fractal

u/Xen

Love it!