Dweets awesomed by u/hells-fargo

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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firegodjr

function u(t) {

x.shadowColor="#fff"
x.shadowBlur=200
x.shadowOffsetY=30
for(i=3;i--;)
x.fillRect(t*300,100+300*i+S(t)*50,50,200)

Sep 24 2018 4:15 PM UTC

}// 113/140

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Carving out grooves in the canvas :)

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katkip

function u(t) {

eval(unescape(escape`挮睩摴株㴱㭤㴨焬攬温㴾砮晩汬剥捴⡱⭮⨱〰⭓⡴⤪㌰〬攬㔰ⰲ〰⤻景爨椽〻椫⬼㤻⥤⠴〰ⰲ〰Ⱪ⤬搨㐰〫匨椪匨琩⭴⨲⤪㄰ⰷ〰⭃⠭椪䌨琯㤩⭴⨳⤪㄰Ⱪ⤻砮晩汬却祬攽✣〰晤✬砮晩汬剥捴⠰ⰵ㐰ⰲ攳ⰲ攳⤻`.replace(/u(..)/g,"$1%")))

Sep 23 2018 2:19 PM UTC

}// 140/140

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The most #realistic #water reflection Dweet ever!

u/joeytwiddle

Very nice! #default
u/sigveseb

Rocks hard

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Noah

remix of d/9878 by u/Noah

function u(t) {

for(c.width|=i=900;i--;)x.fillRect(i*2,500+S((i+(t/10))*2e5)*(200+i/-2),10,10*(i-470))

Sep 16 2018 1:17 PM UTC

}// 86/140

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double the waves

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f8f82804

remix of d/9676 by u/f8f82804

function u(t) {

eval(unescape(escape`景爨椽挮睩摴桞㴰㭩ⴭ㭸⹢敧楮偡瑨⡸⹦楬氨⤩⥃⡡㵴⵩⤾〦♸⹥汬楰獥⠹㘰⬨堽⡩⨹㘰⵩⩩⤪⨮㔪匨愩⤬㘰⭩Ⱘ猽㈵⴨匨愭ㄩ⨨戽⠱⴨⡙㵩ⴴ㠰⤯㐸〩⨪㈩⨪⸵⤩⨪㐪㈴⤪䌨愩⩢ⱳⱍ慴栮慴慮⡙⽘⤬〬㜩`.replace(/u(..)/g,"$1%")))

Sep 5 2018 8:57 PM UTC

}// 138/140

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#specular #d3 #sphere #animated #compressed

Show more comments…
u/f8f82804

for(i=c.width^=0;i--;x.beginPath(x.fill()))C(a=t-i)>0&&x.ellipse(960+(X=(i*960-i*i)**.5*S(a)),60+i,(s=25-(S(a-1)*(b=(1-((Y=i-480)/480)**2)**.5))**4*24)*C(a)*b,s,Math.atan(Y/X),0,7)
u/joeytwiddle

I like how the circles become ellipses at the edges. https://codegolf.tk/a/254
u/magna

WHOA
u/f8f82804

u/joeytwiddle: that's the whole point of this demo, the lighting is just there because I had to compress it and had leftover space
u/f8f82804

you can see this concept implemented without compression in d/9676
u/iverjo

Very nice!
u/f8f82804

#fullhd

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katkip

remix of d/9244 by u/katkip

function u(t) {

for(i=2e3;i--;x.fillRect(i,500+500*S(i/199+C(i*t/200)-S(t)*t),t+25,t+25))x.fillStyle=`hsla(${i/t+t},99%,50%,.1)`

Aug 15 2018 7:41 AM UTC

}// 112/140

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joeytwiddle

remix of d/9220 by u/katkip

function u(t) {

x.font=`3em'`,r=Math.random;for(i=50;i--;x.fillText('makwicths'[i%9],r()*2e3,900*r()**9))x.fillStyle=R(0,C(t*i)*1e3-745);x.drawImage(c,0,9)

Aug 13 2018 6:38 AM UTC

}// 139/140

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firegodjr

remix of d/8942 by u/firegodjr

function u(t) {

F=n=>{for(i=2;i<n;)n=n%i++==0?0:n;return n>1}
x.drawImage(c,0,l=10)
for(j=214;j--;)x.fillStyle=F(j^t*60)?"#f00":"#000",x.fillRect(j*l,0,l,l)

Jul 27 2018 6:06 PM UTC

}// 140/140

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Further optimized the is_prime (F) function. How far can you scroll before timeout? :D #prime

u/fujimotos

It's kinda surprising that the distribution of prime numbers has such a noticeable pattern.
u/firegodjr

Well, primes are still technically pseudorandom. They don't form a noticeable pattern, per se. This algorithm would possibly work with any consistent pseudorandom number generator, but this pattern is uniquely made up of prime number interactions.
u/lionleaf

Well, non-prime numbers definitely have a pattern that I would expect helps making this very beatiful. For instance ever other number is not prime (even), every 5 number, every 7 number etc. So lot's of regularities.
u/fujimotos

Yeah. I see Math.random() > 0.5 produces a pettern looking nothing but garbled noise. In comparison, the one generated by prime numbers is a Persian carpet.

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Tesseract

remix of d/8208 by u/Tesseract

function u(t) {

D=(q,w)=>x.drawImage(c,q,w,960,540)|q+w&&D(0,q)
x.fillRect(D(512,0),0,1,1)

May 22 2018 10:53 PM UTC

}// 74/140

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E-Mouse

remix of d/8046 by u/E-Mouse

function u(t) {

c.width=w=1920
h=c.height
for(i=0;i<w/8;i++)
for(j=0;j<h/8;j++)
g=(w/(t/8))**(i^j)%255,
x.fillStyle=R(g%2,g,g%120),
x.fillRect(i*8,j*8,8,8)

May 9 2018 12:51 PM UTC

}// 139/140

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BalintCsala

function u(t) {

c.width=280
for(i=9;i-->-1;)x.fillRect(D=i*20+(K=(t%1)*20),D,W=20,W)
x.translate(80+K,60+K)
x.rotate(-K/6.5)
x.fillRect(0,0,W,W)

May 3 2018 8:50 PM UTC

}// 128/140

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square going up the stairs

u/Conjuror

love it and it is cool
u/Joachim

Looks good! To stop the jumpiness, replace -K/6.5 with -K/6.2

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