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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katkip

remix of d/11740 by u/katkip

function u(t) {

c.width^=0;for(i=800;i--;)x.lineTo(960+S(t/2-i*5)*1e3,540+C(t-i*4)*900);x.fill()

Jan 11 2019 2:45 PM UTC

}// 80/140

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katkip

function u(t) {

c.width^=0;for(i=900;i--;)x.lineTo(960+S(t-i*1)*1e3,540+C(t-i*9)*900);x.fill()

Jan 11 2019 2:43 PM UTC

}// 78/140

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#abstract

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katkip

function u(t) {

eval(unescape(escape`楦⠡琩筦潲⡩㴲㈻椭ⴻ⥸⹦楬汒散琨椪㤰ⰰⰲ〬㉥㌩ⱸ⹦楬汒散琨〬椪㤰ⰲ攳ⰲ〩㭦潲⡩㴲㈲㭩ⴭ㬩砮晩汬却祬攽✣晦昧ⱸ⹦楬汒散琨䵡瑨⹲慮摯洨⤪ㄹ㈰ⱍ慴栮牡湤潭⠩⨱〸〬㜰ⰷ〩紻`.replace(/u(..)/g,"$1%")))

Jan 12 2019 12:55 PM UTC

}// 130/140

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imperfect #maze XD

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rnbw

function u(t) {

c.width^=0
x.fillStyle='#3ad3'
for(i=-1;i++<8;)x.fill(x.arc(960+S(t+i*.9)*500*(j=Math.min(i,1)),j*400+C(t+i*.9)*129*j+300,0,0,0))

Jan 7 2019 4:48 PM UTC

}// 129/140

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my first dweet of 2019 :D

Show more comments…
u/rnbw

(in which i learned heptagons are surprisingly efficient - tau/7 can be rounded and shortened to 2 characters!)
u/DataMeta

Very nice!
u/lionleaf

#diamond -looking
u/lionleaf

Clean and nice #gem
u/joeytwiddle

Nice! #model is how I tag 3d objects/shapes
u/f8f82804

#d3

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metamero

function u(t) {

eval(unescape(escape`琿砮汩湥呯⡭⬽瀫㵡⼽搽⡡⩡⽫⭢⩢⽫⤪⨱⸵Ɱ⬽焫㵢⽤⤺⡭㵮㵘㵫㴹㘰ⱙ㴵㐰Ⱬ⨽焽㈬瀽㔮㤬潮捬楣欽攽㹸⹦楬汒散琨堽⡙㵫⽩湮敲坩摴栩⩥⹸ⱙ⨽攮礬㠬㠩Ɐ湤扬捬楣欽牥獥琩㭡㵘⵭Ɫ㵙⵮ⱸ⹳瑲潫攨⤻`.replace(/u(..)/g,"$1%")))

Jan 10 2019 2:09 PM UTC

}// 139/140

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now correct #gravity formula : #orbit #physics #interactive : click to set atractor : double click to reset

u/metamero

all of my previous #orbit dweets are not #gravity , please refer to this version for the right formula (gravity ∝ 1/||r||**3)

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SchuSlime64

remix of d/11680 by u/NullifiedWarp

function u(t) {

c.width=1920;x.fillStyle=R(255,S(t*8)*64+64,64-C(t*5)*128);for(i=0;i<2000;i++)x.fillRect(T(i+t)*700+900,600+S(t+i*4)*200,8,100*S(t-i*8)-200)

Jan 8 2019 6:00 PM UTC

}// 140/140

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wrapped the screen and added changing colors

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joeytwiddle

function u(t) {

c.width|=p=(X,Y,W,I,H=W/2)=>H>2?(p(X,Y,H,I*=Math.random()**.2),p(X+H,Y,H,I),p(X,Y+H,H,I),p(X+H,Y+H,H,I)):x.fillRect(X,Y,I,I),p(0,0,R=1024,9)

Jan 9 2019 3:15 PM UTC

}// 140/140

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a sort of rough #recursive #plasma #fractal

u/joeytwiddle

Ideally we would keep the edges smooth, by holding an intensity for each corner instead of the entire square
u/joeytwiddle

W=width, H=half width, I=intensity, p=plot/plasma/partition
u/joeytwiddle

p calls p four times for each sub-square, with a randomly smaller I

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username

remix of d/11751 by u/username

function u(t) {

s=1
eval(unescape(escape`挮睩摴桼㵳㭸⹴牡湳污瑥⠳㠴ⰳ⤻砮牯瑡瑥⡃⡴⤯㈮㐩㭦潲⡭㴰㭭㰲㤴㭸⹦楬汓瑹汥㵠桳污⠤笫⭭⨪㉽ⰹ㤥ⰳ㐥ⰰ⸱怩景爨愠潦嬴㈬ㄳ㈬㈵ㄬ㐰㍝⹭慰⡶㴾瘪匨琯洪猩⨪㈩⥸⹦楬汒散琨愬愬愬愩`.replace(/u(..)/g,"$1%")))

Jan 11 2019 10:44 PM UTC

}// 137/140

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adjust s for speed. both smaller and larger are fun

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username

remix of d/11718 by u/username

function u(t) {

eval(unescape(escape`挮睩摴桼㵬㵛㐲ⰱ㌲ⰲ㔱ⰴ〳崻砮瑲慮獬慴攨㌸㐬㌩㭸⹲潴慴攨䌨琩⼲⸴⤻景爨洽〻洼㈹㐻砮晩汬却祬攽恨獬愨⑻⬫洪⨲紬㤹┬㌴┬〮ㅠ⥦潲⡡⁯映氮浡瀨瘽㹬⹭慰⡬㴾瘪匨琯洩⨪㈩⤩砮晩汬剥捴⠮⸮愩`.replace(/u(..)/g,"$1%")))

Jan 11 2019 10:39 PM UTC

}// 137/140

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stellartux

function u(t) {

k='80';i=t?i+=19:0
x.fillStyle='#'+((t%4*4e6)|0).toString(16).padStart(6,0).substr(0,6)+k
x.fillRect(i,550*(S(t%42)+1),C(i)*k,S(i)*k)
i%=2e3

Jan 10 2019 6:10 PM UTC

}// 140/140

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A woolly scarf