Dweets awesomed by u/rg

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: #ScaryMovies

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rodrigo.siqueira

remix of d/23905 by u/rodrigo.siqueira

function u(t) {

for(i=5e4,w=960;i--;x.fillRect(w+w*X/Z,w*Y/Z/3-Z*710-3000,4/Z/Z,t<4))r=Math.random,X=r()*16-8,Y=r()*20-10,Z=C((X*X+Y*Y)/(Y*X+2)*X-5)/4-5

Sep 24 2021 2:58 PM UTC

}// 136/140

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Abstract trigonometric curves 2

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remix of d/17743 by u/rodrigo.siqueira

function u(t) {

c.width|=0
for(k=0;k<1;k+=.07)
for(X=-5;X<5;X+=.01)
ψ=(1-X**2)*3**-(X**2/2)*S(k*8),x.fillRect((X+5)*140+k*650*S(t),k*800+400-ψ*300*S(t),2,4)

May 19 2020 1:06 AM UTC

}// 140/140

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u/sigveseb

reminds me of a music video I saw once

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remix of d/18851 by u/Foldster

function u(t) {

c.width+=0
t*=93
for(i=1;i<99;i++)
for(j=0;j<99;j++)
(((j+(s=i+t))^(i-j))**2)%7<2?x.fillRect(7*j+i*(128-i)/10,10*(110-i),S(i)*j,T(j)*t/99):0

May 19 2020 12:20 AM UTC

}// 140/140

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u/andrea270872

Very cool. To me it looks like one of those nuclear explosion videos from Terminator 2 or the cold war! Terrific!

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Foldster

function u(t) {

t*=500
c.width+=0
for(i=1;i<80;i++)
for(j=0;j<100;j++)
(((j+(s=i+t))^(s-j))**2)%51<2?x.fillRect(7*i+1.5*j*(130-i)/10,10*(110-i),10,10):1

May 18 2020 3:55 PM UTC

}// 136/140

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Bitfield Road

u/tomxor

O_o i recognise this pattern... shameless plug, here's the interactive gamified version: d/15502
u/ntsutae

This feels good.
u/sigveseb

Almost looks like guitar hero

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pavel

remix of d/11930 by u/pavel

function u(t) {

with(x)for(i=-6*t%1;i++<66;fill())for(beginPath(fillStyle=R(8*i,4*i),j=36);--j;arc(960,h+h*S(3*t)**2/i,h/i*(9+C(~~i+6*t^j)),b=9+j/9,b))h=777

May 2 2020 4:35 AM UTC

}// 140/140

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Walking through a #cavern

Show more comments…
u/KilledByAPixel

🤯 genius
u/KilledByAPixel

Looped! https://twitter.com/KilledByAPixel/status/12…
u/sigveseb

Wooow sweet!
u/aleamb

yeah!
u/sigveseb

Really nice colors
u/jick

Holy cow, wow!
u/Xen

sexy!
u/katkip

aannd we have a winner!
u/KilledByAPixel

https://www.reddit.com/r/perfectloops/commen…
u/pavel

the gif is very blurry
u/KilledByAPixel

HD gif for you - https://www.dropbox.com/s/u3wbakb6e4sm00y/pa…
u/Qwitter

Wow!
u/vain

Who needs longer shaders? ;-) Real DemoScene feeling

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pavel

function u(t) {

for(let i=1920,f=(x,n=420,a=0,b=0)=>a*a+b*b<n?f(x,n-1,a*a-b*b+x,2*a*b+.1133-t/4615):n/420;i--;)x.fillRect(i,180*t,f(i/8e5-.7467),3)

Apr 18 2020 5:59 AM UTC

}// 131/140

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(X=-0.7453, Y=0.1127, R=6.5e-4) section of the #mandelbrot set

u/pavel

This version draws 1x3 pixels to speed up rendering. for(let i=2e3,f=(x,n=420,a=0,b=0)=>a*a+b*b<n?f(x,n-1,a*a-b*b+x,2*a*b+.1133-t/13845):n/420;i--;)x.fillRect(i,60*t,s=f(i/8e5-.7467),s) looks better in fullscreen but is 3x as slow.
u/pavel

let and the automatic scoping of args in f makes this _really_ quick. I can increase the loop to 4e3 iterations and still have 60fps on my machine. Would be interesting to speed this up by rendering multiple rows per frame.
u/katkip

all dweets made by u/pavel are genius
u/Xen

godlike!
u/Qwitter

agreed !!!!

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function u(t) {

c.width=n=2e3;t/=8;for(p=0;p<n;p++)i=C(p),j=T(t/i),k=1/S(t*i),x.font=p%4+'em m',x.fillText("Further.",n*i/4+n/2,n*j/512+n/4,j*p/i/16);//rg

Sep 11 2019 8:03 PM UTC

}// 138/140

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remix of d/15675 by u/rg

function u(t) {

c.width=n=2e3;t/=8;for(p=0;p<n;p++)i=C(p),j=T(t/i),k=1/S(t*i),x.globalAlpha=i>0?i:-i,x.fillText("📖",n*i/4+n/2,n*j/8+n/4,k*p/64);//rg

Sep 10 2019 2:38 AM UTC

}// 132/140

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book.

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remix of d/4935 by u/rg

function u(t) {

var n=1920,e=255,w=_=>[...Array(_).keys()].map(C);w(n).map(i=>{x.fillStyle=R(T(t/i)*e,e*i,e-S(t*i)*e);x.fillText("🛣️",S(t*i)*n,i*n,t/i)})

Sep 10 2019 2:19 AM UTC

}// 138/140

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remix of d/5207 by u/rg

function u(t) {

c.width=n=2e3;t/=8;for(p=0;p<n;p++)i=C(p),j=T(t/i),k=1/S(t*i),x.globalAlpha=i>0?i:-i,x.fillText("🛣️",n*i/4+n/2,n*j/8+n/4,j*p/i/16);//rg

Sep 10 2019 2:17 AM UTC

}// 135/140

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🛣️

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