Dweets awesomed by u/yokljo

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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robbyg

remix of d/6638 by u/robbyg

function u(t) {

x.fillRect(0,0,i=w=1920,w)
t||(X=[...Array(w)].map(s=>Math.random()*w))
for(;z=--i%6+1;)x.clearRect(X[i]+=C(i-t),(i-z+t*z*15)%w,z,z)

Nov 14 2018 2:52 PM UTC

}// 132/140

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I always start thinking about #snow this time of year.

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New_Core

function u(t) {

for(c.width|=i=99;i--;x.rect(0,0,400,20))x.setTransform(S(a=t+i/50),b=C(a),-b,-S(-a),960+800*S(a/.8),540+400*C(a/.9))
x.fill("evenodd")

Nov 13 2018 7:17 PM UTC

}// 135/140

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and3k5

function u(t) {

c.width^=0
x.font="10em s"
s=t*100;
w=1720
h=880
x.fillText("📀",Math.abs(s%w*2-w),150+Math.abs(s%h*2-h))

Nov 13 2018 6:18 AM UTC

}// 104/140

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waiting for that disk to hit the corner perfectly

u/pavel

I wish I could click it and it split into two :)
u/sigveseb

Haha nice
u/joeytwiddle

#bounce

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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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jonathan-potter

function u(t) {

c.width=960
f=(o,l,X=480,Y=270)=>{if(l>1){
x.fillRect(X,Y,2,2)
f(o+t*.1,l*.6,X+=l*C(o),Y+=l*S(o))
f(o-t,l*.75,X,Y)}}
f(t,99)
f(t+3,60)

Nov 12 2018 10:57 PM UTC

}// 134/140

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felt like doing some #selfsimilarity #recursion

u/katkip

cute #fractal

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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

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

Show more comments…
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

remix of d/10939 by u/veubeke

function u(t) {

for(c.width=2*(n=i=300);--i;x.fill(new Path2D('M0 2C8-5,8 8,0 0')))z=4/(2+C(A=t*i/n+i*i)),x.setTransform(C(A)*z,0,0,z,S(A)*99*z+n,i*i%n+9*z)

Nov 12 2018 1:04 AM UTC

}// 140/140

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u/iverjo

#fish

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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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