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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New_Core

function u(t) {

with(Math)p=.2*t%PI*2,g=6*p/4,r=pow(abs(cos(g)/2)**8+abs(sin(g)/3)**4,-1/1),X=r*cos(p),Y=r*sin(p),x.fillRect(X+960,Y+540,9,9)

Mar 24 2017 11:02 AM UTC

}// 125/140

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based on the superformula https://en.wikipedia.org/wiki/Superformula, so playing around with the numbers some other shapes may apear.

u/donbright

excellent
u/New_Core

s=140;with(Math)p=.2*t%PI*2,g=6*p/4,r=pow(abs(cos(g)/1)**2+abs(sin(g)/5)**4,-1/6),X=r*cos(p),Y=r*sin(p),x.fillRect(X*s+960,Y*s+540,9,9)
u/New_Core

s=300;with(Math)p=.2*t%PI*2,g=8*p/4,r=pow(abs(cos(g)/1)**2+abs(sin(g)/5)**4,-1/15),X=r*cos(p),Y=r*sin(p),x.fillRect(X*s+960,Y*s+540,9,9)
u/13thptr

#plot

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nikoloffgeorgi

function u(t) {

c.width|=j=500;k=3.14
for(i=100;i--;){m=i*20;y=j+C(t*.1+i)*S(t*k+i)*j;x.fillStyle=R(m*y,y,0,1);x.beginPath();x.arc(m,y,y*.1,0,k*2);x.fill()}

Nov 16 2018 4:26 PM UTC

}// 140/140

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jniemenmaa

remix of d/14732 by u/New_Core

function u(t) {

for(i=600;i--;x.fillRect(960+400*S(i)*Z,540+i*C(i)*Z,a=i/2*Z,a))Z=T(i+t),x.fillStyle=`hsla(${i+t},99%,50%,.02)`

Jun 24 2019 1:08 PM UTC

}// 112/140

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Purpzie

function u(t) {

eval(unescape(escape`爽筶慬略佦㩍慴栮牡湤潭紻硛愽❦楬汓瑹汥❝㵠桳氨⑻琪㄰ぽ․笲㔫爪㜵紥⑻㈵⭲⨲㕽┩总硛戽❦楬汒散琧崨爪㉥㌬爪ㅥ㌬爪㔰〬爪㔰〩㭸孡崽✣〰〱✻硛扝⠰ⰰⰲ攳ⰲ攳⤻`.replace(/u(..)/g,"$1%")))

Sep 27 2018 1:25 AM UTC

}// 124/140

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rodrigo.siqueira

remix of d/29189 by u/rodrigo.siqueira

function u(t) {

for(t?Y++:Y=0,X=3e3;X--;x.fillRect(X,Y,1,f(X/960-1,Y/1e3-1)))f=(a,b,n=0)=>b?f(a*a-b*b+.3,a*b*4,n*1.2+3):(x.fillStyle=R(n/7,n/29),C(n)**2+.7)

Dec 27 2023 10:23 PM UTC

}// 140/140

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Dragon egg #fractal

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donbright

remix of d/1399 by u/Kalanchoe

function u(t) {

c.width^=0
t?o.push({X:1,Y:1,U:S(t),V:C(t)}):o=[]
o.map(a=>{Q=a.X**2+a.Y**2,a.X+=a.U-=a.X/Q,a.Y+=a.V-=a.Y/Q,x.fillRect(a.X,a.Y,9,9)})

Mar 28 2017 1:45 AM UTC

}// 133/140

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Another fake gravity sim. This time, some particles get slingshotted out of the system, past escape velocity, others teeter on the brink, and others congregate at 0,0. After a while, the screen is full of a bunch of particles leaving, and others coming back in towards the origin.

Show more comments…
u/nonce

your gravity sims are amazing.
u/z3vin

agreed
u/donbright

thanks this site is very inspiring
u/alien

WOW ,Hi what does this mean :D c.width^=0
u/donbright

alien it basically clears the screen to the default width. in detail, i think it is combining "binary xor" with "set equal to", so basically c.width = c.width xor 0, and since anything xored with 0 is itself, its basically setting c.width to itself.
u/donbright

#physics

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rodrigo.siqueira

remix of d/32826 by u/rodrigo.siqueira

function u(t) {

c.width|=m=n=v=540;for(i=1e4;i--;)n=(n+v+v*S(s=(v*(C(i)**-2)<<i)%3))/2,
m=(m+960+v*S(s*2+t/2))/2,x.fillRect(m,n,5,5)

Nov 25 2024 1:30 PM UTC

}// 116/140

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Rotating #Sierpinski dust

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magna

function u(t) {

a=[...(s=u+'')];c.width=450
for(i=140;i--;x.fillRect.apply(x,a))a.unshift(s.charCodeAt(t%i)),x.fillStyle=R.apply(0,a)

Mar 9 2018 1:47 PM UTC

}// 117/140

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Ugly modern art gallery

u/magna

(Just experimenting with using the source code as a data source. But then I realized it's not any different than using a PRNG with a certain seed.)

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cagr30

remix of d/2695 by u/cagr30

function u(t) {

w=2e3;x.globalAlpha=.95;for(x.fillRect(0,0,a=i=w,w);i-=4;)s=11/(-a+(i+t*99)%a),X=a*S(i*9)*s+1e3,Y=a*C(i)*s+500,x.clearRect(X,Y,s*9,s*9)

May 8 2017 10:55 AM UTC

}// 135/140

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ComfyKernel

function u(t) {

c.width=640;
for(var i=0;i<800;++i){
for(var  j=0;j<10;++j){  x.lineTo(((S((0.105*i)+t)+1)*320),C(i)*40+70+S(i*t/200)*120+120);}}x.stroke();

Dec 26 2017 8:49 PM UTC

}// 140/140

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