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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metamero

remix of d/11481 by u/metamero

function u(t) {

t||(p=q=z=256)
ç=a=>((Math.random()*3|0)-1)*t%z+a
p+=ç(w=1836),q+=ç(h=996)
x.fillStyle=R(ç(t)*8%z,t%z,ç(t)*3,.1)
x.fillRect(p%=w,q%=h,84,84)

Dec 19 2018 3:25 AM UTC

}// 140/140

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Ocramoi

function u(t) {

c.width^=1
x.font="3in'"
var a=1
for(a;a<18;a++)x.fillText('-', 100*a*Math.abs(S(t)), 600)
x.fillText('⚫', -200+100*a*Math.abs(S(t)), 640)

Dec 18 2018 3:12 AM UTC

}// 138/140

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Just my first dweet playing with the sin function

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metamero

function u(t) {

t||(p=w=c.width,q=h=c.height)
r=4*Math.random()|0
r?r-1?r-2?p+=9:q+=9:p+=w-9:q+=h-9
x.fillRect(p%=w,q%=h,9,9)

Dec 18 2018 11:30 PM UTC

}// 109/140

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Random Walk

u/taupelink

#randomwalk

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cantelope

function u(t) {

eval(unescape(escape`挮睩摴栽ⴱ㭑㴨堬夽䌨瀩⩤⤽㹻睩瑨⡸⥬楮敔漨堬天ⱙ☦⡸子㴧扥杩湐慴栧崨獴牯步⠩⤬晩汬⡡牣⡘ⱙⰲ〬〬㜩⤩紻儨搽ㄲ㤬〩ⱱ㵓⡴⨴⤬儨搫匨瀽焼〿焺〩⩤⤬硛偝⠩㭑⡥㴱㘹ⰰ⤬儨攫匨瀽焾〿焺〩⩤⤻`.replace(/u(..)/g,"$1%")))

Dec 17 2018 11:21 PM UTC

}// 138/140

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c.width=-1;Q=(X,Y=C(p)*d)=>{with(x)lineTo(X,Y),Y&&(x[P='beginPath'](stroke()),fill(arc(X,Y,20,0,7)))};Q(d=129,0),q=S(t*4),Q(d+S(p=q<0?q:0)*d),x[P]();Q(e=169,0),Q(e+S(p=q>0?q:0)*d)

u/iverjo

#newtonscradle

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metamero

function u(t) {

eval(unescape(escape`挮獴祬攮業慧敒敮摥物湧㴧灩硥污瑥搧Ɐ湣汩捫㵲敳整㭦潲⡩㵣⹷楤瑨㵮㴹㘬洽㔴Ⱬ㵹㵭⩮㭩ⴭ㬩景爨樽活樭ⴻ⥴㼨卛ⴭ歝☦砮晩汬剥捴⡩ⱪⰱⰱ⤬卛歝帽卛欫㉝♓孫ⴱ崦卛欫渭ㅝ⤺卛ⴭ歝㵍慴栮牡湤潭⠩㸮㔻`.replace(/u(..)/g,"$1%")))

Dec 19 2018 10:28 PM UTC

}// 140/140

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pavel

remix of d/11448 by u/carolinaphoenix

function u(t) {

for(w=i=c.width|=0;--i;x.fillRect(960+r*C(a=(i+i*5**.5)*Math.PI),540+r*S(a),9,9))r=(i+60*t)%w

Dec 17 2018 8:12 AM UTC

}// 93/140

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Sunflower seeds. The angles are integer multiples of the golden ratio. https://youtu.be/sj8Sg8qnjOg

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ellisk1

function u(t) {

for(x.strokeStyle=R(x.fillRect(k=.2417,0,2e3,2e3),j=234);j--;x.arc(960,540,((j+t*3)%9)**2*15,a=j*k+C(t),a-k))if(!j%9)x.beginPath(x.stroke())

Dec 16 2018 5:10 PM UTC

}// 140/140

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Endless Tunnel

u/katkip

The problem is there is actually no perspective you are entering a tunnel. The line width must be thicker in the edges

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akm

remix of d/11450 by u/katkip

function u(t) {

q=t/25;x.fillRect(0,0,2e3,2e3);for(i=500;i--;)x.clearRect(960+S(i-1*q)*(500-i),540+C(i-t*q)*(500-i+S(t)),5,5)

Dec 18 2018 4:28 AM UTC

}// 109/140

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is it rolling towards or away from you?

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rnbw

function u(t) {

c.width^=0;x.fillStyle="#4ad";for(i=-14;i++<14;)for(j=-14;j++<14;)x.fillRect(960+(i*S(t)*98)+(j*C(t)*98),540+(i*C(t)*98)+(j*S(-t)*98),99,99)

Dec 18 2018 5:52 PM UTC

}// 140/140

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a twinkling array

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cantelope

remix of d/11424 by u/pavel

function u(t) {

eval(unescape(escape`景爨硛氽❦楬汓瑹汥❝㴧⌰〰㔧ⱸ学㴧晩汬剥捴❝⠰ⰰⱫ㴲攳Ⱬ⤻樽ⴭ款㸶㭸学崨⡩⵪⬴⤪本太本猽未术㈰ⱳ⤩椽欥㘴Ⱨ㴹㘰⼨㌸⵪⤬硛汝㵠桳污⠤笨夽⠸⭃⡩⼴⤪䌨⡴⨳〭橼〩⼴⤪㌩⤪㐰⬱㐰紬㤹┬㜰┬⸵总`.replace(/u(..)/g,"$1%")))

Dec 15 2018 3:06 PM UTC

}// 140/140

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