Dweets awesomed by u/nashcat

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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pavel

remix of d/11016 by u/pavel

function u(t) {

for(w=i=c.width|=q=C(t);j=--i/w;x.fillRect(960+(o*q-l*S(t))*w/z,540+S(a)*w*r/z,s=1e3/z/z,s))r=3+j*C(i),o=S(i)*j,l=C(a=j*t)*r,z=14+o*S(t)+l*q

Nov 17 2018 7:40 AM UTC

}// 140/140

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Ouroboros

u/katkip

haha cool
u/fourier.space

This one gets really good after it eats itself for the 20th time and dissociates into snake gas
u/katkip

ew
u/BirdsTweetCodersDweet

Awesome!

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pavel

remix of d/10979 by u/cantelope

function u(t) {

for(i=c.width|=h=355/226,x.translate(w=960,540),x.rotate(o=S(t));--i;x.fillRect(S(i+t)*w/z/r,(w-i)/z,s=99/z/z,s))r=S(i%h+h/2),z=4-o-C(i+t)/r

Nov 16 2018 3:21 AM UTC

}// 140/140

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u/cantelope

nicely done :)
u/f8f82804

#d3 #perspective

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pavel

function u(t) {

with(x)for(k=n=j=255;j--;k=2,fill())for(beginPath(fillStyle=R(T=(t^k)%2*128,T,i=4));i--;)arc((j%9-t%1)*n+T,(j>>4)*n+T,64*k,a=(i-t%1)*11/7,a)

Nov 13 2018 2:29 AM UTC

}// 140/140

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u/yonatan

arc?!
u/anotherkitten

oh you sly dog very well done
u/pavel

:)
u/jylikangas

Very cool! You can save 3 bytes by removing the unnecessary %1 from t when calculating a and also doing <<7 instead of *128. If someone is wondering how this works using a+1 instead of a at the end may help. :)
u/katkip

#beesandbombs
u/pavel

Removing %1 at the end breaks the animation on my iPhone.

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pavel

function u(t) {

for(d=t<8,n=i=256;i--;x.fillRect(d?9*i:855+n*i*(i<2),!d*300,50,d?4:50))x.fillStyle=R(C((t|Math.abs(i-107))**.5*t)<0&&n)
x.drawImage(c,0,d*4)

Nov 12 2018 3:19 AM UTC

}// 140/140

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Demon

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u/magna

Amazing!
u/iverjo

Spot on!
u/katkip

nice idea
u/ndr3w221

this is awesome!
u/and3k5

i did not expect the last bit! scary!
u/aleamb

great! #waitforit
u/lionleaf

Amazing #demon

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pavel

function u(t) {

p=i=>99*[0,0,3-i,1,6-i,2,i-5,i-7][~~i]
for(c.width|=t%=i=8,x.rotate(.8);i--;m+7&7&&x.fillRect(p(m?i:t)+904,p(m?6-i&7:8-t)-460,90,90))m=~~t-i

Nov 10 2018 7:44 AM UTC

}// 140/140

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This really wants to be faster but I'm out of bytes!

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u/jylikangas

This is challenging stuff!
u/Xen

137: p=i=>99*[0,0,3-i,1,6-i,2,i-5,i-7][~~i] for(x.rotate((c.width|=t%=i=8)/9);i--;m+7&7&&x.fillRect(p(m?i:t)+904,p(m?6-i&7:8-t),90,90))m=~~t-i
u/jylikangas

Full speed 138: p=i=>99*[0,0,3-i,1,6-i,2,i-5,i-7][~~i] for(c.width|=i=8,x.rotate(7);i--;m+7&7&&x.fillRect(p(m?i:T=t*5%8)+700,p(m?6-i&7:8-T),90,90))m=~~T-i
u/pavel

Nice! There is some flicker but you saved enough bytes to fix p=i=>99*[0,0,3-i,1,6-i,2,i-5,i-7][~~i];for(c.width|=i=8,x.rotate(7),T=8*t%8;i--;m+7&7&&x.fillRect(p(m?i:T)+450,p(m?6-i&7:8-T),90,90))m=~~T-i
u/jylikangas

This was fun. I also tried two totally different implementations but it seems your approach is the best.
u/katkip

Haha that's fun

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anotherkitten

function u(t) {

e=(a,b)=>a/b&1?b-a%b:a%b;x.fillRect(0,0,j=2e3,j);x.globalAlpha=.1;for(;j--;x.clearRect(e(t*360*S(b),1911),e(t*360*C(b),1071),9,9))b=j/1200

Nov 9 2018 6:36 PM UTC

}// 138/140

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faster and cleaner version of linear ripple

u/katkip

I love this one!
u/iverjo

#waitforit

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BalintCsala

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㵩㴹㭩ⴭ㭸⹴牡湳景牭⡫㴮㘲⩃⡡㵓⡴⤪ㄮ㔷⤬猽⸶㈪匨愩Ⱝ猬欬眬眩⥸⹲散琨ㄬㄬ砮汩湥坩摴栽眽㌰〬眩ⱸ⹱畡摲慴楣䍵牶敔漨⡺㴱㔰⤫匨琩⩺ⱺⵓ⡴⤪稬眬眩㭸⹳瑲潫攨⤻`.replace(/u(..)/g,"$1%")))

Nov 8 2018 7:58 PM UTC

}// 131/140

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Fibonacci spiral

u/katkip

Owwww woottt thats awesome
u/rodrigo.siqueira

SOURCE CODE: for(c.width|=i=9;i--;x.transform(k=.62*C(a=S(t)*1.57),s=.62*S(a),-s,k,w,w))x.rect(1,1,x.lineWidth=w=300,w),x.quadraticCurveTo((z=150)+S(t)*z,z-S(t)*z,w,w);x.stroke();
u/rodrigo.siqueira

Animated Golden Rectangle #Fibonacci Sequence
u/vain

very cool golden ratio / rectangle fx. (never seen before like this, great!)

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yonatan

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㵩㴵ㄲ㭩ⴭ㭸⹦楬汒散琨㤶〫瀮砪瀮眬㔴〫瀮礪瀮眬瀮眬瀮眩⥰㵮敷⁄位䵡瑲楸⡛⸮⸧㌰〰〳〰〰㌵〰〰❝⤮牯瑡瑥䅸楳䅮杬攨琬琬〬琪㤹⤮瑲慮獦潲浐潩湴⡮敷⁄位偯楮琨椾㸶☷Ⱪ㸾㌦㜬椦㜩⤻`.replace(/u(..)/g,"$1%")))

Nov 8 2018 10:26 AM UTC

}// 140/140

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for(c.width|=i=512;i--;x.fillRect(960+p.x*p.w,540+p.y*p.w,p.w,p.w))p=new DOMMatrix([...'3000030000350000']).rotateAxisAngle(t,t,0,t*99).transformPoint(new DOMPoint(i>>6&7,i>>3&7,i&7));

u/katkip

This is nice
u/iverjo

Cool!
u/katkip

#transpose

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pavel

function u(t) {

for(c.width|=r=i=300;j=i--/46;f(),f(d=1.1+j),f(-d),f(X,d),f(X,-d))s=i?3:9,f=(a=X=S(A=j+3*t),b=C(A))=>x.fillRect(960+r*a-s,540+r*b-s,2*s,2*s)

Nov 8 2018 7:03 AM UTC

}// 140/140

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u/twitter

Ooh, nice! #trigonometry #educational
u/joeytwiddle

#math

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pavel

function u(t) {

for(c.width=640,s=145;s-=5;)for(t+=.05,Q=t%4,i=17;i--;)x.lineTo(320+s*S(A=(2*Q*(Q<1)+i-(i>>2))*1.571),180+5/8*s*(C(A)+1-(i&4)/2));x.stroke()

Nov 8 2018 4:55 AM UTC

}// 140/140

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u/DataMeta

Very cool

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