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.

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Current theme challenge: #Opposites

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rodrigo.siqueira

remix of d/17068 by u/pavel

function u(t) {

for(i=8;i--;x.strokeStyle=`hsl(${55*t},65%,${50*(5*t%2)}%`,x.stroke())x.beginPath(r=t*99),x.arc(960+r*C(a=i+t),540+r*S(a),160*t**.5,0,7)

Jan 6 2020 7:55 PM UTC

}// 136/140

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Color spiral of circles #spiral

u/pavel

Wow this one looks nice after some time #waitforit
u/aleamb

nice!

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KilledByAPixel

remix of d/16396 by u/KilledByAPixel

function u(t) {

for(i=1e3;--i;x.fillRect(960+S(m)*q,540+C(m)*q,s=q/9,s))m=i/9+9*t,q=1e5/i,x.fillStyle=`hsl(${i+m*99} 99%${50+i/20}%`

Nov 2 2019 1:17 AM UTC

}// 116/140

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Rainbow Spiral 🌈

u/joeytwiddle

#rainbow #spiral I like this

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TotocheBro

function u(t) {

for(i=0;i<1500;
x.fillRect(i?940+i*S(F=(t/50)+i+S((t/200)*i)):0,
i?540+(1*i*C(F)+10/i):0,K=i++?S(i)*8:2000,K))
x.fillStyle=R(.25,i,i)

Oct 31 2019 6:26 AM UTC

}// 133/140

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Weeeeeooooo

u/joeytwiddle

#spiral

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rodrigo.siqueira

remix of d/15329 by u/tomxor

function u(t) {

for(a=b=0,i=1e4*(t<9);i--;x.fillRect(a*640,b*800-500,1,.1)) 
r=1|Math.random()*3,
a+=(r-a+b*C(b*3))*.5,
b+=(2-a*b+C(b*3))*.25

Aug 13 2019 12:05 PM UTC

}// 125/140

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Chaos Photographer, Pic 1, Remix 1 #spiral

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KilledByAPixel

remix of d/15309 by u/katkip

function u(t) {

for(c.width|=i=9;i--;)for(k=j=1;j+=k;j-99?0:k=-1)x.arc(960,540,j*12,a=i*.698+S(t-j/9)+S(t*2+j*3)*k/3,a)
x.rect(0,0,2e3,2e3)
x.fill`evenodd`

Aug 8 2019 5:28 AM UTC

}// 139/140

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Flower #spiral

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Xen

remix of d/14887 by u/Blacklink

function u(t) {

for(c.width|=i=111;i--;x.stroke())x.beginPath(x.lineWidth=(q=(t*5*(i+t))%1e3)/8),x.arc(980,540,q,i+t/i,i+t/i+1)

Jul 2 2019 7:27 PM UTC

}// 111/140

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had to have a play with this one

u/Xen

#spiral

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Xen

remix of d/14852 by u/Xen

function u(t) {

for(c.width=k=379;k--;)x.arc(191+C(t*9+k),99+S(t*8+k),k/3,-t,t)
x.fill`evenodd`

Jul 1 2019 3:39 PM UTC

}// 79/140

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Dweetnosis

u/Xen

#moire #trippy #spiral

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13thptr

function u(t) {

h=N=M=0
for(i=18;i--;x.stroke(new Path2D(`M500 500L${M+(b=500)} ${N+b}L${O+b} ${P+b}`)))O=M,P=N,M=C(h+=Math.atan2(99,r=i**.5*99))*r,N=S(h)*r

Jun 28 2019 9:33 PM UTC

}// 140/140

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Spiral of Theodorus

u/donbright

awesome
u/13thptr

#spiral #math #path2d
u/13thptr

Thanks to u/joeytwiddle for the golfing help

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Xen

remix of d/1359 by u/sigveseb

function u(t) {

x.beginPath(Z=c.width=512);x.translate(256,128);(a=b=>{b&&a(b-1);x.rotate(1+S(t/99));x.lineTo(C((t-b)%1)*b/t,S(t%1)*b)})(Z*2);x.stroke()

Jun 20 2019 7:05 PM UTC

}// 136/140

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massive shoutz to sigveseb!

u/Xen

#trippy #spiral

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Xen

remix of d/14693 by u/Xen

function u(t) {

x.beginPath(x.stroke())
x.arc(940+C(Z=t*2)*9,540+S(Z)*9,1e3-69*t,t,Z)

Jun 20 2019 6:19 PM UTC

}// 69/140

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quick test

u/Xen

#spiral #moire #texture

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