Dwitter - javascript demos in 140 characters

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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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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katkip

function u(t) {

eval(unescape(escape`挮睩摴桞㴰㭴⼽㈻昽⡘ⱙⱳ⤽㹻砮扥杩湐慴栨⤻楦⡳㸲〩砮慲挨堬夬猬〬㜩ⱸ⹳瑲潫攨⤬昨堫䌨猫琩⩳ⱙⱳ⼲⤬昨堭䌨猫琩⩳ⱙⱳ⼲⤬昨堬夫䌨猫琩⩳ⱳ⼲⤬昨堬夭䌨猫琩⩳ⱳ⼲⥽㭦⠹㘰ⰵ㐰ⰷ〰⤻`.replace(/u(..)/g,"$1%")))

Dec 30 2018 10:15 AM UTC

}// 135/140

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#circles #fractal #recursion #recursive I'm just like a gifted autistic kid who finally discovered recursion c.width^=0;t/=2;f=(X,Y,s)=>{x.beginPath();if(s>20)x.arc(X,Y,s,0,7),x.stroke(),f(X+C(s+t)*s,Y,s/2),f(X-C(s+t)*s,Y,s/2),f(X,Y+C(s+t)*s,s/2),f(X,Y-C(s+t)*s,s/2)};f(960,540,700)

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New_Core

function u(t) {

for(i=130;i--;x.fill())r=Math.random()*500*S(t/2)+99,x.beginPath(),x.fillStyle=R(r,r/2,r/3,S(a=i*t)/30),x.arc(960+r*C(a),440+r*S(a),i/3,0,7)

Dec 30 2018 2:37 PM UTC

}// 140/140

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was messing around with some code and stumbled on this erupt of black smoke.

u/katkip

Paint?
u/katkip

Nvm, vulcano

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Undefined

function u(t) {

c.width^=0;for(i=360;i--;)x.globalAlpha=.5,x.beginPath(),x.ellipse(a=960+S(i+t)*100,b=540+C(i-t)*100,a%200,b%200,0,0,7),x.stroke()

Jan 2 2019 5:13 PM UTC

}// 130/140

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Accidentally made a 4D ring :D

u/katkip

Not really.
u/Undefined

It gets even more interesting if you change one of the radius values to a normal number, like 5...

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katkip

function u(t) {

c.width^=0;f=(X,Y,d)=>{if(d>30)x.arc(X,Y,d,0,7),f(X-d*C(d+t),Y,d/2),f(X,Y-d*S(d+t),d/2),x.stroke()}
f(960,540,300)

Dec 30 2018 12:21 PM UTC

}// 114/140

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Perfectly moving circles inside a circle #recursive

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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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katkip

function u(t) {

eval(unescape(escape`挮睩摴桞㴰㭲㴨堬夬猩㴾筩昨猾㈩砮晩汬剥捴⡘ⱙⱳ⨲ⱳ⨲⤬爨堭猬夭猬猯㈩Ⱳ⡘⵳ⱙ⭳ⱳ⼲⤬爨堫猬夭猬猯㈩Ⱳ⡘⭳ⱙ⭳ⱳ⼲⥽㭸⹧汯扡汁汰桡㴮㔫䌨琪㈩⨮㌬爨㤶〬㔴〫䌨琩⨴㈰ⰴ㠰⤻`.replace(/u(..)/g,"$1%")))

Dec 31 2018 12:15 PM UTC

}// 131/140

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#infinite #sierpinski #recursion #layers #levels #grayscale #fractal #recursive

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katkip

remix of d/11581 by u/katkip

function u(t) {

eval(unescape(escape`挮睩摴桞㴰㭺㴨堬夬猩㴾筩昨猾㄰⥸⹦楬汒散琨堭猬夬猪㈬猯䌨琩⤬砮晩汬剥捴⡘ⱙ⵳ⱳ⼱〬猪㤩ⱺ⡘⵳ⱙⱳ⼲⤬稨堬夭猬猯㈩ⱺ⡘ⱙ⭳ⱳ⼲⤬稨堫猬夬猯㈩紻稨㤶〬㔴〬㈸〫䌨琪㈩⨲〩`.replace(/u(..)/g,"$1%")))

Dec 30 2018 9:35 AM UTC

}// 130/140

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Floating island of #fractal s #sierpinski

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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