Top dweets by u/rodrigo.siqueira

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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rodrigo.siqueira

function u(t) {

for(var I=1180;I--;)for(var a=0,b=t/15,T=12;T--;)
a=S(a)*b+t/I-2,
b=C(I*a/500)*b-2,
b>0&&x.fillRect(t*60,I-90,1,.6)

Jun 11 2019 8:06 PM UTC

}// 115/140

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Marbled Patterns of Chaos - Nonlinear interactions inspired by an old paper marbling technique.

u/magna

#texture
u/katkip

Awesomed!

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rodrigo.siqueira

remix of d/12319 by u/rodrigo.siqueira

function u(t) {

c.width|=X=Y=Z=1
for(i=1e4;i--;){
Z+=(X*Y-Z)/60
X+=(Y-X)/9
Y+=X*(30-Z)/50
x.lineTo(960+X*50+Y*C(t)*60,600-X**3+Y*S(t)*50)
}x.stroke()

Jun 9 2019 2:31 AM UTC

}// 133/140

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Lorenz attractor rotating in 3D #lorenz #attractor

u/donbright

epic

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rodrigo.siqueira

function u(t) {

if(t<16){p=S(t)*999,q=p*t //random p,q
for(i=5e3;i--;){
po=p
p+=S(q+p),q+=po
q%=2*Math.PI,p%=2*Math.PI
x.fillRect(q*310,p*250,1,1)}}

Jun 7 2019 3:35 PM UTC

}// 132/140

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The chaotic sea in the phase space of the standard map on the two-torus. We observe a mixture of chains of chaotic regions, ergodic looks and stable islands. As seen on: https://www.math.uni-tuebingen.de/user/stke/… #chaos #attractor

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rodrigo.siqueira

function u(t) {

c.width|=0
x.font='2in"'
c.style.background=`linear-gradient(#fff,#068)`
x.fillText("🐠 🐟🐟🐟🐟", 2e3-400*(t%9),530+S(t)*200);

May 23 2019 4:51 PM UTC

}// 122/140

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Aquarium

u/Xen

cool idea
u/joeytwiddle

#aquarium

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rodrigo.siqueira

remix of d/12968 by u/rodrigo.siqueira

function u(t) {

c.width+=0
for(var i=1e3;i=i-.25;){
var K=(i&2)-S(t)
var X=K*S(i)/2+S(40*i+t)
var Y=C(i)/2-C(40*i-t)*K
x.fillRect(960+X*180,520+Y*180,4,3)
}

Apr 4 2019 12:12 PM UTC

}// 140/140

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Two dancing torus. "var" is not needed, but performance (fps) is better with them.

u/username

But if you do not specify anything, it will be a var anyway?
u/yonatan

It'll be global, which means it can be accessed outside of the u() function, which kills some compiler optimizations

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rodrigo.siqueira

remix of d/12467 by u/rodrigo.siqueira

function u(t) {

t||(a=b=0)
for(i=3e3;i--;)x.fillStyle=`hsl(9,45%,${S(t*4)*50}%)`,x.fillRect(960+b*C(a)+(a&1?b:-b),540+b*S(a),1,2),a+=2*C(2.6*a)-t/2,b+=.001

Feb 22 2019 1:39 PM UTC

}// 139/140

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Symmetric bifurcations. The symmetry trick is ...+(a&1?b:-b), this will sometimes add a value ("b") and sometimes subtract. #bifurcation

u/iverjo

#scary #eyes
u/donbright

rodrigo these are amazing

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rodrigo.siqueira

remix of d/12434 by u/katkip

function u(t) {

t||(a=b=0)
for(i=2e3;i--;)x.fillRect(960+b*C(a),540+b*S(a),1,1),a+=1.8*C(2.6*a)+C(t/4+.009),b+=.002

Feb 20 2019 9:24 PM UTC

}// 99/140

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The Flower of Bifurcation #bifurcation

u/katkip

this is #cute #math

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rodrigo.siqueira

remix of d/12369 by u/ETHproductions

function u(t) {

c.width&=q=-6;for(x.translate(960,540);q++;x.rotate(20.106))for(i=p=99;p+i--;p*=-1){x.fillRect(C(i/2)*C(i/62)*p,S(t)*99+i*S(t/2)*4,6,4)}

Feb 16 2019 3:14 PM UTC

}// 136/140

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Star mandala

u/joeytwiddle

Pretty! #flower

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rodrigo.siqueira

remix of d/12018 by u/rodrigo.siqueira

function u(t) {

a=b=t;s=2e3;x.globalAlpha=.2;for(i=s;--i;)x.fillStyle=R(a*i,9,i*b/6),
x.fillRect(1100+a*s,b*s,2,2),a=.2+.1*S(2*b)+C(2*a),b=S(a/5)+C(b)*t/12

Jan 31 2019 6:44 PM UTC

}// 139/140

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Bifurcation over chaotic maps. Feigenbaum constant may hide somewhere. #fractal

u/rodrigo.siqueira

#bifurcation

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rodrigo.siqueira

remix of d/21345 by u/rodrigo.siqueira

function u(t) {

for(i=2e3,f=g=>(1+t)*i*g(i*i)*g(i/t)**.01;i--;x.fillRect(950+f(C),99+f(S)+t*i,8/t,9/t))x.fillStyle=`hsl(${250+i/7},80%,${S(i/1e5+t)*99}%,.2`

Dec 31 2025 2:30 PM UTC

}// 140/140

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#fireworks 2026

u/ximavus

happy new years! its still 2025 here btw 7PM
u/cantelope

#firework (singular)

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