Dweets awesomed by u/neimad

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: #Food

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MrHaila

function u(t) {

c.width^=0
for(i=0;i<20;i++){
o=S(S(t*(i+1))*(S(t)-0.5))*800
q=i*98
e=i*2.5
x.fillRect(q,400,50,200+o+e)
x.fillRect(q,700+o-e,50,200-o+e)
}

Dec 3 2020 10:13 PM UTC

}// 139/140

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Hello world!

u/Xen

welcome to the dwitter family!

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taupelink

remix of d/20654 by u/taupelink

function u(t) {

r=Math.random;for(i=k=214;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*5)*9,h=k*S(Y%S(m=X/6%S(p=C(q=Y*S(X/3))*2)*2)),x.fillStyle=R(h*p,h*m,h*q)

Dec 2 2020 4:43 AM UTC

}// 140/140

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d/20902

u/pavel

You can save 7 chars by doing f=i*t,X=f*f%9,Y=X*f%5 in these instead of Math.random. It seems random enough.
u/taupelink

Oh cool, thank you!! I like the way it changes the animation at the beginning too.

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pavel

function u(t) {

for(i=c.width|=0;i--;x.fillRect(660+(p>>2)*200+130*C(a=Math.PI/4+(p+p/4&1||-1)*(369/13*d+3*t)),240+p%4*200+130*S(a),d,d))d=i%120/9,p=i/120|0

Dec 1 2020 8:51 PM UTC

}// 140/140

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#beesandbombs demake https://twitter.com/beesandbombs/status/1327…

u/rep_movsd

If you stare a bit, you see white lines completing the circles - an optical illusion
u/danny@hille.dk

save 9 bytes for(i=c.width|=0;i--;x.fillRect(660+(p>>2)*200+130*C(a=.8+(p+p/4&1||-1)*(28.4*d+3*t)),240+p%4*200+130*S(a),d,d))p=i/120|0,d=i%120/9
u/danny@hille.dk

120/9 = 40/3
u/danny@hille.dk

129 bytes -> for(m=120,i=c.width|=0;i--;x.fillRect(660+(p>>2)*200+m*C(a=.8+(p+p/4&1||-1)*(28.4*d+3*t)),240+p%4*200+m*S(a),d,d))d=i%m/9,p=i/m|0

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Xen

remix of d/20889 by u/lerc

function u(t) {

with(x)fillRect(!setTransform(1,n=(C(S(t)*7))/4,-n*3,1,z=1337,507),!drawImage(c,-z,-500),9,19),fillStyle=`hsl(${t*z} 99%50%`
Xen

Dec 1 2020 7:08 PM UTC

}// 128/140

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Golf and Play for more rainbow

u/lerc

I tried a hsl but couldn't fit it. Nice to see the broken hsl format works. Is it tollerant across browsers?
u/Xen

highly broken and worse on phones but i wanted my 128 lol

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pavel

function u(t) {

with(x)for(beginPath(fill()),T=!T,fillStyle=T?'#fff2':R(),i=710;a=i--/113;arc(960,540,300+99*f(28),a,a))f=n=>T?n:n&&S(n|n*t)*S(a*n)/n+f(n-1)

Dec 1 2020 5:14 AM UTC

}// 140/140

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u/Xen

nice style!
u/Xen

nice style!
u/DataMeta

big fan of this one
u/danny@hille.dk

This is awesome!
u/Qwitter

fantastic!

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solendil

function u(t) {

G=(a,b,c)=>{x.fillStyle=`hsl(${a},80%,${b}%,${c}`
x.fill(p=new Path2D,p.arc(1e3,C(t*1.4)*500+500,1e5,t,t+3.14,a))}
G(0,0,.03)
G(t*99,50,.01)

Nov 30 2020 3:58 PM UTC

}// 140/140

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Neon

u/Xen

nice style!
u/MAxSaL

This could have been a Windows XP screen saver.

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solendil

function u(t) {

eval(unescape(escape`𠐽𭀿𦰮𛠮𠐬𮱘𛁙𛁚𯑝𞡛𪐽𜑝𒡚🐨𜑥𝐯𪐫𚰪𚠱𛠱𚐪𚠮𝐊𭱨𪑬𩐨𦀽𚁍👍𨑴𪀮𬡡𫡤𫱭𚐨𦐽𣐨𚐪𜑥𜰩𚠲𩐳𛁁𛡦𪑮𩀨𨐽🡍𨑴𪀮𪁹𬁯𭀨𦀭𨐮𦀬𦐭𨐮𦐩🁚𚱡𛡚𚐩𞱸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𦁽𘀸𜀥𝀰𙑠𒡸𛡦𪑬𫀨𬀽𫡥𭰠𤁡𭁨𜡄𛁰𛡡𬡣𚁘𛁙𛁚𛀰𛀷𚐩`.replace(/uD./g,'')))

Nov 28 2020 2:26 PM UTC

}// 140/140

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nonoverlapping circle space fill #waitforit #fullscreen

u/katkip

I tried to do that too

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danny@hille.dk

remix of d/20749 by u/danny@hille.dk

function u(t) {

for(c.width=X=60;X--;)for(Y=35;Y--;x.fillStyle=R(o=C(S(X*Y*C(t/3)/64)+(Math.hypot(X-30,Y-17)/12-t)*5)*99,-o*3,o*2))x.fillRect(X,Y,1,1)

Nov 27 2020 9:29 PM UTC

}// 134/140

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WebGl version -> http://glslsandbox.com/e#70785.0

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rodrigo.siqueira

remix of d/20810 by u/geb

function u(t) {

for(i=3e3,c.width|=f=g=>i*C(i/4+t)*g(i/9)/7;i--;x.fillRect(960+f(S),540+f(C),8,8))x.fillStyle=`hsl(${i/20},80%,50%`,c.style='filter:invert('

Nov 26 2020 12:29 PM UTC

}// 140/140

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Purple blue energy

u/jellyedwards

Very cool!
u/danny@hille.dk

Nice effect

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geb

remix of d/20806 by u/rodrigo.siqueira

function u(t) {

for(i=3e3,c.width|=f=g=>i*S(i+t)*g(i/23/6-t)/8;i--;x.fillRect(950+f(S),455+i*(i%2)+f(C),9,9))x.fillStyle=R(i,i/9,t),c.style='filter:invert('

Nov 26 2020 8:29 AM UTC

}// 140/140

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u/danny@hille.dk

fairy wand

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