New #spiral dweets

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: #Opposites

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rodrigo.siqueira

remix of d/26436 by u/rodrigo.siqueira

function u(t) {

for(m=2e3;m--;x.fill(x.stroke()))x.beginPath(x.fillStyle=R(m/2,i=m%99,i/t,.06)),x.arc(960+m*C(K=m/t/80)/t,540+m*S(K)/t,i*S(m+t)**12/t/t,0,m)

Nov 2 2022 9:39 PM UTC

}// 140/140

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Line flow #spiral

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rodrigo.siqueira

remix of d/26189 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert('
for(a=b=0,i=5e4;i--;x.fillRect(a*1e3-930,b*500,t<3,.1))r=S(i*i)**599,a+=r-a/9+b*S(a/1.9+t/9)*.3,b-=r*t*b-C(a/1.3)

Oct 21 2022 10:56 PM UTC

}// 138/140

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Andromeda texture #spiral #galaxy

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rodrigo.siqueira

remix of d/26191 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert('
for(a=b=0,i=5e4;i--;x.fillRect(a*200,b*170+520,t<2,.1))r=0|6*C(i**t)**150,a+=r-a/17+b*S(a/.98)/4,b-=r*t*b/27-C(a)/3

Sep 23 2022 5:28 PM UTC

}// 140/140

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Garden of Spirals #spiral

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rodrigo.siqueira

remix of d/26189 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert('
for(a=b=0,i=5e4;i--;x.fillRect(a*380-9,b*230+370,1,.1))r=~6*S(i**8)**200,a-=r+a/15-b*S(a/2)/6,b+=r*b*t/9-C(a*a+b)/9

Sep 23 2022 1:00 AM UTC

}// 140/140

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Some spirals #spiral

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rodrigo.siqueira

remix of d/26179 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert('
for(a=b=0,i=5e4;i--;x.fillRect(a*820-2e3,b*380,1,.1))r=0|6*C(i**6)**150,a+=r-a/14+b*S(a/1.5)/4,b-=r*t*b/3-C(a*4)/3

Sep 22 2022 12:54 PM UTC

}// 139/140

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Dust spiral #spiral

u/rodrigo.siqueira

Andromeda texture #spiral #galaxy

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rodrigo.siqueira

remix of d/17786 by u/rodrigo.siqueira

function u(t) {

c.style='filter:invert('
for(a=b=0,i=1e4;i--;x.fillRect(a*1e3,600-b*540,1,.2))r=0|6*S(i**6)**4/5,a+=r/2-a/7+b*S(a*3)/3,b-=r*t*b/4-C(a*3)/3

Sep 21 2022 11:57 AM UTC

}// 138/140

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Stardust #spiral

u/cantelope

how did i know this dweet was from @rodrigo.siqueira before i looked? :D
u/nix

that would be next Tool album's cover \m/

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rodrigo.siqueira

remix of d/25894 by u/rodrigo.siqueira

function u(t) {

for(K=X=-540;X<-K;X++)for(Y=K;Y<-K;Y++)h=S(2*Math.atan(Y/X)+Math.log(Math.sqrt(X*X+Y*Y))*9),h<S(X*Y/h)&&x.fillRect(960-X,Y-K+t,1,t<.1)

Jul 30 2022 4:57 PM UTC

}// 134/140

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Spiralnebel (Spiral Nebula), a more accurate translation from the original C64 code. #spiral Original code from 1984 by Norbert Treitz, für Phantasie und Logik.

u/andrea270872

Wow!
u/rodrigo.siqueira

"Spiele mit Computer-Grafik. Für Phantasie und Logik" (Norbert Treitz, 1984), page 63. Short video showing the book: https://twitter.com/quasimondo/status/155338…

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rodrigo.siqueira

function u(t) {

for(K=X=-500;X<-K;X++)for(Y=K;Y<-K;Y++)h=T(3*Math.atan(Y/X)+Math.log(Math.sqrt(X*X+Y*Y))*5)/2,h<S(X*Y/h)&&x.fillRect(960-X,Y-K+t,.3,t<.1)

Jul 30 2022 4:35 PM UTC

}// 137/140

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Spiral Nebula. Based on Spiralnebel https://mobile.twitter.com/quasimondo/status… - Lots of dweet ideas in this 1984 book of BASIC generative art: Spiele Mit Computer Grafik (Games with computer graphics) #spiral

u/rodrigo.siqueira

The full original Commodore 64 BASIC code (8 lines) is here: https://www.c64-wiki.de/wiki/Spiele_mit_Comp…

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BriSeven

function u(t) {

x.save()
x.translate(940,550)
x.rotate(t*30)
x.font=4*t+'px a'
x.fillText(String.fromCodePoint((14000+((t*240|0)))),30*t,30*t)
x.restore()

Jun 28 2022 11:09 AM UTC

}// 138/140

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string ring

u/rodrigo.siqueira

The vortex of Chinese concrete poetry #spiral
u/CazadorDePerros

wow, lovely!

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rodrigo.siqueira

remix of d/25569 by u/rodrigo.siqueira

function u(t) {

f=(x,y,n=X/20)=>y<X+x?f(2*x*y+.16,x*x/4.8-y*y*C(y/2)+.5,n+.8):S(n/40)
for(i=1e4;i--;x.fillRect(X=u&2047,u>>11,f(X/3e4-.6,u/8e7-.59),1))u=-~u

Jun 17 2022 4:01 PM UTC

}// 140/140

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Spiral gate: vortex to infinity #fractal #spiral

dwitter.net | #spiral