Dweets awesomed by u/ellisk1

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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Current theme challenge: #Opposites

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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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ellisk1

function u(t) {

for(c.width|=i=3;i--;)x.arc(960,540,450*i*i,0,7);x.fill('evenodd');for(j=3e3;j--;x.fillRect(2e3*S(j*j+t/9),1e3*C(j),j,j/9))x.globalAlpha=.01

Nov 17 2018 1:32 AM UTC

}// 140/140

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Cloudy Full Moon

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rnbw

function u(t) {

c.width^=0;x.fillStyle='#5b9';for(j=0;j<12;j++)for(i=0;i<22;i++){x.beginPath(x.fill(x.arc(99*i,99*j,S(t*3+i*3.14+j*3.14)*20+49,0,7)))}

Nov 16 2018 7:32 PM UTC

}// 134/140

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oooooh, circles

u/Xen

Nice
u/sigveseb

cool style

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jylikangas

function u(t) {

for(c.width|=t%=i=6;i--;(A=a=>x.beginPath(x.fill(x.arc(i*365+(k?T=t%1:t>i)*200,700-S(1/T)*5,85,a,a+3))))(a=k*t*3.2+i-t/6),A(a+3.14))k=~~t==i

Nov 14 2018 9:27 PM UTC

}// 140/140

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Rolling physics

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u/joeytwiddle

Great effect
u/sigveseb

The camera shake is pretty sweet
u/iverjo

You keep impressing me
u/DataMeta

Quite clever
u/statenlogic

+1 for usingd an optical illusion for some of the movement
u/13thptr

#physics #bounce

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rodrigo.siqueira

remix of d/1231 by u/iverjo

function u(t) {

c.width^=0;for(i=9;i<2e3;i+=2)s=3/(9.1-(t+i/9)%9),x.beginPath(),j=i*7+S(i*4+t+S(t)),x.lineWidth=s*s,x.arc(960,540,s*49,j,j+.01),x.stroke()

Nov 14 2018 6:52 PM UTC

}// 138/140

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Warp drive hyperspace jump

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anotherkitten

function u(t) {

t=S(t)*1.7;for(c.width|=j=0;j++<9;)for(h=5;h-->-4;)for(i=5;i-->-4;x.fillRect(958+h*m*t-j*4,538+i*m*t-j*4,m+4,m+4))m=8*j,x.fillStyle=R(m,m*2)

Nov 13 2018 4:10 AM UTC

}// 140/140

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diced

u/aleamb

amazing!
u/joeytwiddle

Nice! Small tweak, just swinging left and right: for(c.width|=j=0;j++<9;)for(h=5;h-->-4;)for(i=5;i-->-4;x.fillRect(958+h*m*2-j*4+m*9*S(t),538+i*m*2-j*4,m+9,m+9))m=8*j,x.fillStyle=R(m,m*2)

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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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ellisk1

remix of d/10896 by u/ellisk1

function u(t) {

with(x)for(j=200;j--;fill())lineWidth=w=9*(C(j+t)+2),beginPath(strokeStyle=R(0,0,j)),arc(2e3*C(j*j+t/9),1e3*S(j**3+t/7),w*7,0,7),stroke()

Nov 10 2018 3:01 AM UTC

}// 137/140

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Deep Sea Bubbles

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