Dweets awesomed by u/nic

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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Yax

function u(t) {

c.width|=0
a=300
for(i=a;i--;)
b=t/2+i,x.fillStyle=R(a,b),x.fillRect(i*10,700+a*Math.abs(S(b)),25,a),x.fillRect(a*5+i*C(b),a+i*S(b),25,25)

Dec 28 2017 12:16 AM UTC

}// 138/140

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u/sigveseb

Very stylish!
u/magna

Wow!
u/iverjo

#sun
u/joeytwiddle

#landscape #ocean #sunset

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trupples

function u(t) {

c.width|=0
c.style.background=R()
x.fillStyle="#fff"
for(i=1e3;i--;p=1e5*S(i),r=9/(9-(p+t)%9),x.fillRect(C(i)*99*r+960,540+r*C(p)*99,r,r));

Dec 27 2017 11:51 PM UTC

}// 139/140

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u/sigveseb

Good starfield
u/trupples

<3
u/iverjo

#stars #starfield
u/jdspugh

Perfect

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Xen

remix of d/4188 by u/xem

function u(t) {

t?k=c.width=95:d=0;for(e=[i=5e3];i--;x.fillRect(i%k,i/k,1,e[i]=(n-1|d[i])==3|i%9&!d))for(j of[n=1,94,k,96])n+=d[i+j]+d[i-j];d=e

Dec 27 2017 11:04 PM UTC

}// 127/140

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follow the remix for info ^^

u/JoshiRaez

Omg, tje game of life. Cool :D
u/xem

Nice, my version just tried to be as precise as possible with more characters
u/eviltoad

Beatiful!
u/katkip

#gameoflife

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xem

function u(t) {

if(!t)d=0;for(c.width=150,e=[i=6e3];i--;x.fillRect(i%k|0,i/k|0,1,e[i]=(n-1|d[i])==3|i%9&!d))for(j of[n=1,73,k=74,75])n+=d[i+j]+d[i-j];d=e

Dec 27 2017 10:17 PM UTC

}// 137/140

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Game of life inspired by https://github.com/xem/miniGameOfLife2/ (cc. @subzey @nderscore @veubeke @xen_the @justecorruptio), also shout out to @aemkei for #672

u/iverjo

#gameoflife

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Moosething

function u(t) {

v=c.width|=m=x=>x>0?x*z:0;z=240;for(i=0;i<7;i++) x.arc(p=i==0?z-m(V=S(t*5)):i==6?v-z+m(-V):z+i*z,3*z,z/2,0,7),x.rect(p,0,7,3*z);x.fill()

Dec 27 2017 8:19 PM UTC

}// 136/140

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u/sigveseb

Newtons cradle :D
u/katkip

x.arc(p=i==0?z-m(V=C(t*2.812)):i==6?v-z+m(-V):z+i*z,3*z,z/2,0,7) for real life speed

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AliYil

remix of d/4059 by u/AliYil

function u(t) {

for(i=0;i<20;i++)for(j=0;j<12;j++){s=S(S(t)*i+j+t*10)*25+25
k=127
x.fillStyle=R(S(t*3)*k+k,S(t*2)*k+k)
x.fillRect(i*100-s,j*100-s,s*2,s*2)}

Dec 27 2017 8:07 PM UTC

}// 139/140

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u/Xen

very nice :-D
u/sigveseb

Good!
u/itsjustmustafa

so sick!

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nystrand

function u(t) {

for(i=c.width|=g=(o,a=n=7,b=8,z)=>--n?g(n>5?i*n:t/n,b*C(o)-a*S(o),z,a*C(o)+b*S(o)):x.lineTo(a*(z+=40)+960,b*z+540);i--;g(i&t/2));x.stroke()

Dec 27 2017 12:24 PM UTC

}// 139/140

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u/jaemiejaemie

reminds me of older windows screensavers, really nice!
u/iverjo

How was this made?

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jaemiejaemie

function u(t) {

c.width=640;x.beginPath();for(i=0;i<640;i++){a=180;for(j=1;j<t*60%60;j+=~~(t)%2+1){a+=S((i+t*60)*j/20)*50/j}x.lineTo(i,a)}x.stroke()

Dec 27 2017 10:31 AM UTC

}// 132/140

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demonstration of basic fourier curves (square/saw)

Show more comments…
u/sigveseb

Very cool!
u/joeytwiddle

Nice. DSP hero!
u/iverjo

Kudos!
u/RomanW

Excellent!
u/joeytwiddle

#math
u/katkip

#fourier

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letsbreelhere

remix of d/3826 by u/sokacsavok

function u(t) {

α=200;c.width=α*2;τ=Math.PI*2;x.font="36px A";x.fillText(['🌚','🌒','🌓','🌔','🌝','🌖','🌗','🌘'][(t|0)%8],α+C(t)*70,50+70+S(t)*70);

Dec 27 2017 3:31 AM UTC

}// 125/140

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Show more comments…
u/abrunkhorst

This is super clever!
u/sigveseb

Needs more upvotes!
u/miggy

I love the unicode 'α'
u/xem

-18b: x.fillText([...'🌚🌒🌓🌔🌝🌖🌗🌘']
u/letsbreelhere

@xem TIL!
u/sigveseb

Ooh clever use of ... operator
u/berti

so much yes
u/lionleaf

#sun #emoji #moon

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sokacsavok

function u(t) {

α=9E2;β=5E2;c.width=α*2;τ=Math.PI*2;X=80;x.arc(α+C(t)*β,β+S(t)*β,40,0,τ);x.arc(α,β,X,0,τ);x.fill();

Dec 27 2017 2:51 AM UTC

}// 99/140

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Under 100 chars. Unfortunately the moon doesn't fit inside 140. :(

u/Polyducks

Nice use of math chars!

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