Dweets awesomed by u/ersagun

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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KilledByAPixel

remix of d/18406 by u/KilledByAPixel

function u(t) {

for(c.width|=i=z=1001;i--;)
x.arc(z,540,500,q=S(i*Math.PI*99/1e3+t/z)*t+1.57,q)
x.fill()

Apr 22 2020 4:56 AM UTC

}// 88/140

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u/KilledByAPixel

#waitforit
u/ersagun

#circlechallenge
u/joeytwiddle

One of the best examples of this effect IMO #trippy
u/donbright

oh my gourd

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ersagun

remix of d/18371 by u/BriSeven

function u(t) {

x.fillStyle=R(0,0,0,1-(X=C(t**1.2))*X-(Y=C(t**1.1))*Y)
x.fillRect(960+X*200,540+Y*200,5,5)

Apr 21 2020 10:30 PM UTC

}// 90/140

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u/BriSeven

#circlechallenge
u/donbright

now thats a use of fillstyle i have never seen before

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DaSpider

function u(t) {

eval(unescape(escape`𩡯𬠨𮠽𚁣𛡷𪑤𭁨𯀽𜀩𛰴𛁢👄𨑴𩐨𚐮𬱬𪑣𩐨𜐶𛀲𝀩𛡳𬁬𪑴𚀧𞠧𚐬𮀮𭁲𨑮𬱬𨑴𩐨𮠪𜠬𮠩𛁩🐶𜀻𪐭𛐻𮀮𬡯𭁡𭁥𚀭𛠱𜀵𚐬𮀮𩡩𫁬𤡥𨱴𚀰𛀭𘑨𚡺𚰳𝐬𜐫𚁨𯁼𪐥𝐽🐰𚐪𝐬𛐳𜀭𪀪𮠩𚐊𪀽𛠵𚠨𪐽👢𦰰𧐥𜐲𚠵𚐫𚁩🐽𨡛𜑝𚐫𚁩🐽𨡛𜡝𚐊`.replace(/u../g,'')))

Apr 21 2020 7:04 PM UTC

}// 136/140

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Analog #clock

u/Xen

nice!
u/DaSpider

#time #analogclock #analog #circlechallenge

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ersagun

remix of d/18372 by u/KilledByAPixel

function u(t) {

x.fillRect(960-t*200,540-(w=(t*(2-t))**.5*200),4,w*2)

Apr 21 2020 6:59 PM UTC

}// 53/140

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Is this ok?

u/BriSeven

#circlechallenge

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ersagun

function u(t) {

c.width|=0
for(i=3e3;i--;)x.fillRect((C(l=i*(b=Math.PI*2/((t&14)+3)))-(v=2*C(b/4))*C(u=S(i*i)*b/4+l))*300+500,(S(l)-v*S(u))*300+500,3,3)

Apr 21 2020 6:44 PM UTC

}// 136/140

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Constant width

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katkip

function u(t) {

eval(unescape(escape`𪑦𚀡𭀩𮱱👛𧐻𩡯𬠨𪐽𜰱𝀱𞱩𛐭𞰩𬐮𬁵𬱨𚁻𮀺𤰨𪐪𜡥𛐳𚐬𪐺𪐪𜡥𛐳𛁹𞡃𚁩𚠲𩐭𜰩𛁡𞠰𯐩𯐊𩡯𬠨𫰠𫱦𘁱𚑸𛡦𪑬𫁒𩑣𭀨𞐶𜀫𫰮𮀪𜠰𜀬𝐴𜀫𫰮𮐪𜠰𜀬𛠵𛀮𝐩𛁯𛡸𚰽𠰨𫰮𨐩𛰵𝐬𫰮𮐫👓𚁯𛡡𚐯𝐵𛁯𛡡𚰽𤰨𫰮𪐪𜰫𫰮𮀪𫰮𮐩`.replace(/uD./g,'')));'test'

Apr 21 2020 11:07 AM UTC

}// 140/140

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u/Xen

sexy

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rodrigo.siqueira

remix of d/18323 by u/pavel

function u(t) {

for(i=2e3,f=(X,Y,n=89)=>X<9?f(X*X-Y*Y-.8,2*X*Y+.2,n+2):x.fillStyle=`hsl(${n*2} 90%${n/2}%`;i--;x.fillRect(i,t*90,1,900))f(i/490-2,1-t/6)

Apr 19 2020 9:13 PM UTC

}// 136/140

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Color #Julia Set #fractal purple blue rays

u/pavel

Broken on Safari because of the missing space in the hsl
u/katkip

satisfying to watch
u/rodrigo.siqueira

Here is a version (with other colors) working on Safari: https://www.dwitter.net/d/18352

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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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pavel

remix of d/12336 by u/pavel

function u(t) {

for(i=t?w=600:a=b=0;i--;x.fillRect(w*b,w-w*a,1,1))[a,b]=[[3.4*a+b/6,a-b,b-a,0][q=Math.random()**t*4|0]/4,[3.4*b-a/6+2,a+b+1,a+b+.5,b][q]/4]

Apr 17 2020 11:24 PM UTC

}// 139/140

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Barnsley #fern #fractal #leaf #uncompressed

u/pavel

This version is also #improved with a #grow effect and a cap on how dark the image gets if you leave it for a while.
u/Xen

nice!

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KilledByAPixel

remix of d/18260 by u/KilledByAPixel

function u(t) {

for(r=Math.random,j=4e3;--j;x.fillRect(960-Y*R,640-C*R,t<30,1))C=C*T--?Y*Y-C*C+(Y=2*C*Y+B,A):A=r(Y=B=r(T=R=440)*6-3)*3-1

Apr 17 2020 10:20 PM UTC

}// 120/140

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Triangle #Fractal

u/tomxor

Wow, gnarly!
u/UEZ

looks like the #illuminati symbol

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