Dweets awesomed by u/13thptr

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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JWinslow23

function u(t) {

x.fillStyle=!(i=t*60%320|0)&&R(c=Math.random()*256,c,c);"㌥崥交&啕䕥ꊤ*㍷䶢&ᅕ䔢ꉅ\nᅕ鴢깂*".charCodeAt(i/16)>>i%16&1&&x.fillRect(i%64*32,i>>6<<5,32,32)

Jan 1 2019 4:24 AM UTC

}// 139/140

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Ring in the New Year!

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keithclark

function u(t) {

for(x.fillRect(x.globalAlpha=.2,q=t%2,2e3,2e3),i=125;i--;x.clearRect(S(t|1)*760+S(i)*v+960,(q*q/2-C(i))*v+380,l=6-q*3,l))v=q*200-S(i*.2)*i*q

Dec 31 2018 9:44 PM UTC

}// 140/140

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New Year Fireworks

Show more comments…
u/13thptr

elegant :)
u/keithclark

change S(i*.2)*i*q for S(i*t>>4)*i*q for varying firework effects (2 chars over the limit tho)
u/katkip

haha i like the variation
u/JWinslow23

If q will only ever be 0 or 1 (t%2), couldn't this just be for(x.fillRect(x.globalAlpha=.2,q=t%2,2e3,2e3),i=125;i--;x.clearRect(S(t|1)*760+S(i)*v+960,(q/2-C(i))*v+380,l=6-q*3,l))v=q*200-S(i*.2)*i*q? That way, the variation also works.
u/keithclark

I opted for what I had because it held the initial shape in the sky for longer before gravity takes hold. Your version works and if you're happy to trade off the initial shape, you could also drop the \2 and save another 2 chars
u/keithclark

... also q can be any value between 0 and 1
u/JWinslow23

Ah, my mistake, I forgot about floats
u/lionleaf

Nice one! #nye #fireworks
u/iverjo

Beautiful!
u/vain

3... 2... 1... ignition... beautiful firework

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katkip

remix of d/11595 by u/katkip

function u(t) {

eval(unescape(escape`挮獴祬攮扡捫杲潵湤㵒⠩Ⱳ㴨堬夬猩㴾筩昨猾㌩砮晩汬却祬攽恨獬⠤筳⩴紬㤰┬㐰┩怬砮晩汬剥捴⡘⵳ⱙ⵳ⱳ⨲ⱳ⨲⤬爨堭猬夭猬猯㈩Ⱳ⡘⵳ⱙ⭳ⱳ⼲⤬爨堫猬夭猬猯㈩Ⱳ⡘⭳ⱙ⭳ⱳ⼲⥽㭲⠹㘰ⰵ㐰ⰴ㠰⤻`.replace(/u(..)/g,"$1%")))

Dec 31 2018 11:36 AM UTC

}// 138/140

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T-square #fractal #recursion #recursive #rainbow

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JWinslow23

function u(t) {

P=t%18*60;if(P<1){c.width^=0;a=[1]}b=[];for(i=a.length;i--;){p=a[i];x.fillRect(960-P/2+i,P,p,p);b[i+1]^=p;b[i]=0^p}a=b

Dec 31 2018 7:53 AM UTC

}// 118/140

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My first Dweet! It's nothing too special, but I did as much golfing as I knew how to do.

u/katkip

Nice.
u/rodrigo.siqueira

It is possible to compress about 10% more with small goof tricks. 103 characters instead of 115: P=t*60;P<1?c.width^=a=b=[1]:0;for(i=a.length;i--;)p=a[i],x.fillRect(960-P/2+i,P,p,p),b[i+1]^=p,b[i]=0^p

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rodrigo.siqueira

remix of d/11566 by u/ellisk1

function u(t) {

with(x)for(m=q=t*30|0;m-->q-90;fill(arc(960+(r=m**.2*60*S(m))*S(a=m**4),540+r*C(a),w*3,0,9)))beginPath(fillStyle=R((w=q-m)*2,0,0,1/w**1.48))

Dec 28 2018 6:18 PM UTC

}// 140/140

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Mutating blood cell on microscope

u/aleamb

great! #cell
u/rodrigo.siqueira

#blood #coronavirus #growth

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13thptr

function u(t) {

c.width=w=400;x.fillText(x.font=m="17px Hello",0,19)
x.getImageData(0,0,w,j=99).data.map((e,i)=>e&&x.fillRect(j*C(i%w*.016-t)+j,i/w,3,3))

Dec 28 2018 11:13 AM UTC

}// 137/140

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Somewhat ambiguous because of implicit orthographic projection

u/13thptr

(first dweet :D)
u/13thptr

add |0 after i/w for a more solid look
u/lionleaf

Nice! Glad to see you make a first dweet :D
u/jylikangas

Welcome! Very nice 1st Dweet! Golfed to 131b -> c.width=w=400; with(x)getImageData(fillText(font="17px Hello",0,19),0,w,j=99).data.map((e,i)=>e&&fillRect(j*C(i%w/63-t)+j,i/w,3,3))
u/13thptr

thanks for the nice comments ! u/jylikangas cool tricks but it seems like inlining fillText in getImageData won't work in FF :(

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ellisk1

function u(t) {

with(x)for(m=q=t*30|0;m-->q-99;fill(arc(960+(r=m**.5*20*C(m))*S(a=m**3),540+r*C(a),w,0,7)))beginPath(fillStyle=R((w=q-m)*2,0,0,1/w**1.48))

Dec 28 2018 1:29 AM UTC

}// 138/140

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VIRUS

u/katkip

#virus I hope this will not aggravate my cold.
u/BirdsTweetCodersDweet

:O

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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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ellisk1

function u(t) {

for(k=c.width|=n=960;k--;x.fillRect(n+(y/3+40)*C(a),y,7,99))j=k%n,a=j/62+((j/192|0)+(k>n))*3.2,x.fillStyle=R(b=S(a)*255,-b/2),y=(a+t*5)*30%n

Dec 25 2018 11:41 AM UTC

}// 140/140

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Ribbon Christmas Tree

u/rodrigo.siqueira

#christmas #tree

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joeytwiddle

remix of d/7638 by u/joeytwiddle

function u(t) {

for(R=Math.random,i=700;i--;x.fillRect(960+r*C(a),80+y+r/9*S(a),s=T?.01:.1,s))y=896*(R()**.5),T=y>768,r=T?9:(y|127)*(y/9+y%128)/300,a=99*R()

Dec 25 2018 8:11 AM UTC

}// 140/140

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Seasons Greetings!

u/katkip

!
u/joeytwiddle

Less wide: (y/4+y%128)/700 More real: (y*S(y/300)-2*y%128)/1200,a=99*R()
u/joeytwiddle

#christmas #xmas #tree
u/joeytwiddle

Too slow? Try s=T?.09:.2

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