Dweets awesomed by u/mohd-akram

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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pavel

remix of d/9830 by u/joeytwiddle

function u(t) {

for(c.width|=j=22,t%=2;--j;)for(i=8;i--;x.arc(960,540,i&&j>2*p&&70*(j-2*p),a=(i+p)*355/339,a))p=1/(1+2**(j+6-16*t));x.fill('evenodd')

Nov 23 2018 3:16 AM UTC

}// 133/140

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u/joeytwiddle

Golfed with plenty to spare. Fantastic!
u/sigveseb

Oh my
u/iverjo

Yes!
u/pavel

#uncompressed

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pavel

remix of d/11100 by u/pavel

function u(t) {

for(c.width|=i=18,t%=8,T=t<<1;i--;)x.rect(535+(i?i-1:T)*50,440-!i*200*S(t*Math.PI),i?!~~(T-i+1.5)^i%2?50:0:100,200);x.fill('evenodd')

Nov 21 2018 6:30 PM UTC

}// 134/140

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Evenodd 2 #default

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pavel

function u(t) {

c.width=-1;i=t%9;with(x){for(j=9;j>i;moveTo(X=i*35,84))fillText(' Awesome!'[j],35*j--,87);fillStyle='#fe0';fill(arc(X,84,9,a=S(i*3)**2,-a))}

Nov 21 2018 8:34 AM UTC

}// 140/140

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Awesome #pacman

u/jylikangas

Awesome!
u/magna

Pacman!

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pavel

remix of d/11101 by u/pavel

function u(t) {

for(f=i=405;i--;f=x[f?'fillRect':'clearRect'](-1,-1,2,2))x.setTransform(s=32+S((i+(j=i>>5)+t)*Math.PI)*16<<f,0,0,s,i%32*99,j*99),x.rotate(t)

Nov 21 2018 6:39 AM UTC

}// 140/140

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Dancing Squares #beesandbombs

u/pavel

This one took a lot of golfing. Calling rotate separately actually saves bytes as it avoids the scale definition / multiplication
u/katkip

!

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pavel

remix of d/11018 by u/pavel

function u(t) {

t?c.width=innerWidth:a=b=X=Y=0
onmousemove=e=>(X=e.x,Y=e.y)
x.moveTo(a+=C(d=Math.atan2(Y-b,X-a)),b+=S(d))
x.arc(a,b,20,d+t%1,d-t%1)
x.fill()

Nov 21 2018 5:11 AM UTC

}// 140/140

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Pacman is hungry #interactive

u/pavel

#pacman

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pavel

function u(t) {

with(x)fillStyle=R(0,0,0,.01),fillRect(0,0,w=2e3,w),setTransform(a=6*S(A=t**9),b=6*C(A),-b,a,A%w,-99),clearRect(0,0,3,w),strokeRect(0,0,3,w)

Nov 20 2018 6:31 AM UTC

}// 140/140

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Strings in yr face #beesandbombs

u/katkip

#web

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Quant1um

function u(t) {

for(i=c.width=920;z=i/(s=50),i>0;i-=9){for(F=k=1,R=6;k<(h=t<<1);k++)R+=[0,1,0,-1][k%4]*(F*=z/k)*(h-1-k?1:t%1);x.lineTo(i,R*s)}x.stroke()

Sep 25 2018 11:28 AM UTC

}// 136/140

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Sine created using Taylor series

u/Quant1um

#math

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Quant1um

function u(t) {

t||(l=r=9,m=0,k=.02,d=.05,c.onclick=e=>r=e.y/28)
for(c.width|=i=99,x.lineWidth=l+=m+=k*(r-l)-m*d;i--;)x.lineTo(S(i/3)*80+960,i*l)
x.stroke()

Sep 18 2018 12:00 PM UTC

}// 140/140

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Interactive damped spring simulation #physics #interactive

u/Quant1um

You can try different stiffness(k) and dampening(d) factors
u/donbright

yayyy
u/Quant1um

u/donbright, https://www.myphysicslab.com/pendulum/double…
u/Quant1um

Ow, sorry, this meant to be under double pendulum post

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Quant1um

function u(t) {

eval(unescape(escape`瑼簨礽稽昽㐸㜬椽樽〩㭯㵓⡤㵺⵹⤬栽椪椪昪漫匨稩⼲Ᵽ⹷楤瑨簽愽㤶〬戽㤹ⱛ〬礫㵩⬽欽⡪⩪⩦⩯ⵓ⡹⤫株䌨搩⤯⠱⭯⩯⤯昬稫㵪ⴽ栯昫欪䌨搩崮浡瀨椽㹸⹬楮敔漨愫㵓⡩⤪㌰〬戫㵃⡩⤪㌰〩⤬砮獴牯步⠩㬻`.replace(/u(..)/g,"$1%")))

Sep 16 2018 3:17 PM UTC

}// 140/140

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Double pendulum simulation #physics

Show more comments…
u/BirdsTweetCodersDweet

t||(y=z=f=487,i=j=0,x.lineWidth=5,x.globalAlpha=.02);o=S(d=z-y),h=i*i*f*o+S(z)/2,a=960,b=99,[0,y+=i+=k=(j*j*f*o-S(y)+h*C(d))/(1+o*o)/f,z+=j-=h/f+k*C(d)].map(i=>x.lineTo(a+=S(i)*300,b+=C(i)*300)),x.stroke(); this is cool...
u/iverjo

Nice
u/Quant1um

Thanks!
u/donbright

holy crow
u/donbright

how does it work??
u/Quant1um

u/donbright, https://www.myphysicslab.com/pendulum/double…

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Quant1um

function u(t) {

eval(unescape(escape`景爨挮睩摴桞㵩㴰㭩㰶㈸㭩⬽㤩景爨樽ⴳ㭪㰴㭪⬫⥢㵩⼱〰ⱡ㴹⭪⩓⡭㵢⼲⭴⤬渽䌨戩⩡Ɐ㵓⡢⤪愬瀽横䌨洩Ɽ㵃⡢⤪㔫樫㄰ⱸ⹦楬汓瑹汥㵒⡤⨽㄰ⱤⱤ⤬砮晩汬剥捴⠨㌲⭮ⵯ⤪㌰Ⱘ㌲⭮⭯⭰⨲⤪ㄵⰲ〬㈰⤻`.replace(/u(..)/g,"$1%")))

Sep 16 2018 1:37 PM UTC

}// 139/140

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Simple Möbius strip

u/Quant1um

#mobius
u/prplz

-50 chars d/9910

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