Dweets awesomed by u/firegodjr

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: #Food

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New_Core

remix of d/3007 by u/New_Core

function u(t) {

b=c.width|=1,d=350
X=10*S(t)
Y=10*C(t)
for(i=d;i--;x.fillRect(X*Z+960,Y*Z+540,Z,Z))Z=d/(9+d-t*i%d),X+=6*C(a=i/50-9*S(t/8)*S(i/9)),Y+=6*S(a)

Aug 3 2017 7:42 AM UTC

}// 139/140

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total chaos ;)

u/13thptr

#d3

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FireFly

function u(t) {

for(i=5e3;i--;i%4||x.beginPath())Z=i/128+i%2,X=i/4%32+(i%4>1),x.fillStyle=R(Y=S(X*X/32+Z*Z/32-X-Z-t*6)*80+99),x.fill(x.lineTo(X*60,Z*35-Y))

Aug 2 2017 9:02 PM UTC

}// 139/140

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Ripples!

u/alien

Respect

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Rybar

function u(t) {

c.width=2e3;
  for(i = 0; i < 2e3; i++){
    o = 0.00314 * i,x.fillRect((960 + S(t-o)*500*C(i/3) ), 800*C(i/900) + C(t-o)*300, 10,10 )}

Jul 27 2017 2:02 PM UTC

}// 135/140

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hscells

remix of d/2739 by u/hscells

function u(t) {

x.fillStyle=`hsl(${9*t},99%,60%)`
x.rotate(t*Math.PI)
x.fillRect(0,0,99,2e3)
x.setTransform(1,0,0,1,S(t)*2e2,C(t)*2e2)
x.translate(990,480)

May 16 2017 9:39 PM UTC

}// 139/140

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keithclark

function u(t) {

for(a=c.width|=0,G=36,J=S(t)/4;a--;'p}¶¼<¼¶}p'.charCodeAt(Y*C(t)+G-X*J&15)>>(X*C(t)+Y*J+t*G)%15&1&&x.fillRect(X*G,Y*G,G,G))X=a%53,Y=a>>6

May 3 2017 1:26 PM UTC

}// 138/140

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fullscreen rotozoom

u/joeytwiddle

#spaceinvaders #rotozoom #alien
u/yonatan

3-char shorter transposed bitmap (just posting so I won't forget it): 'ĄǼͶ߿׽ԅØ'

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yonatan

function u(t) {

d=x['get'+(I='ImageData')](0,0,c.width=128,72)
d.data.map((_,i,a)=>a[3|i]=(X=i&511)*C(t)-(i>>=7)**S(t)&X**S(t)+i*C(t)&255)
x['put'+I](d,0,0)

Apr 28 2017 8:45 PM UTC

}// 140/140

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u/iverjo

#rotozoom

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NMcCoy

function u(t) {

c.width=1920;
  for(i=0;i<9;i++)
{
  x.fillStyle=`hsl(${t*99+i*20},99%,80%`
  x.fillRect(400+i*100+S(t)*300, 400+S(t+i)*60, 50, 200)
}

Apr 14 2017 8:02 PM UTC

}// 134/140

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u/f8f82804

#default

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z3vin

remix of d/2322 by u/z3vin

function u(t) {

r=(n)=>Math.random()*n;h=w=1920;with(x)beginPath(),moveTo(0,0),lineTo(r(w),r(h)),strokeStyle='#fff',stroke(),fillRect(r(w),r(h*2.5),r(99),h)

Mar 27 2017 6:43 PM UTC

}// 140/140

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thanks @mxfh

u/donbright

never have i wished so much for a 'pause' function. cool pictures
u/z3vin

haha yes a lot of scenic moments in the city :) @donbright

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donbright

remix of d/1863 by u/SpecialAgent

function u(t) {

c.width=1024;w=64;for(i=w*w;i--;)X=i%w,Y=i/w>>0,P=128*((1-t*t)*X*X/(1+t*t)+2*t*Y*Y/(1+t*t)),x.fillRect(200+X*10,Y*10,P%11,P%11)

Mar 11 2017 2:03 AM UTC

}// 129/140

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No Sine or Cosine were harmed in the making of this demo. It is not random - and if it runs long enough it should theoretically become a still image

u/sfz

Those ripples are tripping me out
u/donbright

note to future self - this varies from x*x + y*Y to x*x-y*y (circle to hyperbola) by using the rational parameterization of the circle with one variable parameter, where (1-t**2)/(1+t**2) is an alternate to cosine and 2t/(1+t**2) is an alternate to sine. (or vice versa i forget lol)
u/magna

Awesome!
u/z3vin

So cool

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sfz

function u(t) {

W=c.width|=0
for(i=q=20,h=q*9,H=3*h;i>0;i-=.01)N=C(t*q),O=C(i),V=3**O-2*C(4*i)-S(i/q)**5,x.fillText('🦋',W*t%4e3-H+h*O*V,H+h*(N+N*S(i)*V))

Mar 8 2017 7:06 AM UTC

}// 137/140

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Butterfly for my daughter

u/sfz

(Chrome only)
u/magna

Awesome!
u/sigveseb

Creative ^^
u/donbright

works in newer firefox!!!
u/sfz

woohoo

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