Dweets awesomed by u/gpolonus

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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LimeLaser

remix of d/12626 by u/qm3ster

function u(t) {

r=Math.random
p=t?p.map(([u,v,i,j]=[99,99,1,1])=>[u+i,v+j,i+(960-u)/1e4+r()-0.5,j+(540-v)/1e4+r()-0.5,x.fillRect(u,v,4,4)]):[...Array(99)]

Mar 7 2019 7:30 AM UTC

}// 138/140

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99 Accelerating Particles (thank you qm3ster)

u/LimeLaser

I have been hoping to make a particle system that persists individual positions and velocities for a while now. With the code golfing qm3ster has done, I can finally do it!

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gpolonus

function u(t) {

r=Math.random
w=r()
h=r()
x.beginPath()
x.arc(w*1920,h*1080,50,0,2*Math.PI)
x.fillStyle=R(255*w,255*h,255,0.5)
x.fill()

Mar 5 2019 4:22 PM UTC

}// 119/140

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Raindrops

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rodrigo.siqueira

function u(t) {

X=Y=0
for(c.width|=i=1e3;i--;){
X=X*C(2*t+Y*2)+Y/4
Y=C(X+Y+X+t/3)-S(i+X+t)/3
x.fillRect(960+X*820,540+Y*400,5,5)
}

Feb 4 2019 2:16 AM UTC

}// 114/140

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Interaction of live attractors

u/katkip

WOWWW #attractor AWESOME
u/donbright

WOAH

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echo85

function u(t) {

for(s=300,r=4/s,j=60*t*r-2,i=-2;i<2;i+=r){for(X=i,Y=j,T=9;T--;)U=X,X=X*X-Y*Y+i,Y=2*U*Y+j;X*X<9&&x.fillRect(i*s+4*s,j*s+2*s,4,4)}

Dec 26 2018 9:54 PM UTC

}// 128/140

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mandelbrot set

u/katkip

nice #mandelbrot #fractal

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anotherkitten

function u(t) {

if(t<14)for(t*=5,i=7;--i;z=C(t*.99)*499+499,x.fill(p=new Path2D,p.arc(960+C(t+i)*z,540+S(t+i)*z,60,0,7)))x.fillStyle=`hsl(${i*60},99%,${t}%`

Nov 29 2018 8:46 PM UTC

}// 140/140

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woven mess

u/katkip

#symmetry

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pavel

remix of d/11116 by u/vistefan

function u(t) {

t?0:D=[0,-5,0,d=5,w=X=Y=150]
for(i=w;i--;x.fillRect(X,Y,5,5))x.fillStyle=R(b=w-x.getImageData(X+=D[d&3],Y+=D[++d&3],1,1).data[0],b,d+=b&&2)

Nov 22 2018 7:01 AM UTC

}// 139/140

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Fast Langton's ant #waitforit

u/katkip

Wow thats cool
u/pavel

#ant #automata

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jonathan-potter

function u(t) {

N=t%32
P=c.width=128
for(k=0;k<N;k++) {
 for(n=0;n<N;n++) {
  s=6.28*k*n/N
  x.fillStyle=R(P*C(s),P*S(s))
  x.fillRect(k*2,n*2,2,2)
 }
}

Nov 12 2018 6:28 PM UTC

}// 136/140

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#dftmatrix Fourier Transforms make me happy. red=real, green=imaginary

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pavel

remix of d/10921 by u/jonathan-potter

function u(t) {

with(x)for(c.width|=s=347,lineWidth=4;s>2;stroke())rect(!translate(s,s),!rotate(a=1.57*S(t)),s*=.62,s),quadraticCurveTo(X=s*(2+a)/4,s-X,s,s)

Nov 10 2018 1:07 AM UTC

}// 140/140

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jonathan-potter

function u(t) {

s=350
with(x){resetTransform()
clearRect(0,0,2e3,2e3)
f=o=>{if(s>9){translate(s,s);rotate(o);strokeRect(0,0,s/=1.6,s);f(o)}}
f(1.57*S(t))}

Nov 9 2018 9:54 PM UTC

}// 138/140

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#goldenratio #notwasm

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ersagun

remix of d/10573 by u/logistikalism@gmail.com

function u(t) {

for(i=9;--i;)for(j=9;--j;)x.fillRect(120*i+C(t*i)*50,120*j+C(t*j)*50,1,1)
x.fillRect(C(t)*300+1480,C(t*(1+Math.sqrt(2))/2)*300+540,1,1)

Oct 21 2018 1:10 AM UTC

}// 135/140

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Plaid pillow #goldenratio #phi

u/katkip

nice

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