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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marc8

function u(t) {

c.width|=0
for(i=0;i<9;i++){
x.fillStyle=`hsla(${i*25},100%,50%,.5)`
x.fillRect(Math.max(500,Math.min(1300,(i+5)*100+S(t)*800)),400,50,200)}

Feb 2 2018 6:02 PM UTC

}// 140/140

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u/lionleaf

Always fun with remixes of the default dweet! Nice one!
u/f8f82804

#default

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BirdsTweetCodersDweet

remix of d/6674 by u/akm

function u(t) {

d=x.createImageData(c.width=192,c.height=108);for(i=3;i<9e5;i+=4)d.data[i]=S(T(new Date%40))*255;x.putImageData(d,0,0)

Feb 3 2018 8:59 PM UTC

}// 118/140

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Changed i limit to 9e5 for more random-seeming bars and did S(T( for a cooler effect

u/BirdsTweetCodersDweet

Changed i limit to 9e5 for more random-seeming bars and did S(T( for a cooler effect
u/Apex

Looks cool but lags like crazy for me

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Apex

remix of d/6616 by u/akm

function u(t) {

c.width+=0
x.font='90px a'
x.fillText('Time wasted watching this dweet: '+~~(t/60)+'m'+~~t%60+'s',0,70)

Feb 3 2018 8:23 PM UTC

}// 103/140

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Golfed the time-waster

u/Apex

Less charming, I know, but at least it fixes the typo
u/akm

Oh my goodness, I just noticed my typo. I like the trick you did for the font!
u/Apex

Lmao, thanks
u/Purpzie

i love this skdfjsdhfjsdjf

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jonathan_b

remix of d/6685 by u/ellisk1

function u(t) {

r=S(t),q=t%4*500,x.fillStyle=`hsl(${r*256},90%,50%,60%)`,x.beginPath(),x.arc(960+q*C(a=6*q+t),600+q*S(a),q/2+20,e=3+a,e+.8+r%1/3),x.fill()

Feb 4 2018 7:31 PM UTC

}// 138/140

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nickd3000

function u(t) {

v=160,s=20;for(i=0;i<60*v;i++)l=(i%v),m=((i/v)|0), k=v*(1+S((C(l/15)/C(m/17))+(t*4))),x.fillStyle=R(n=k+m*2,n+m,n+k),x.fillRect(l*s,m*s,s,s)

Feb 1 2018 9:02 PM UTC

}// 140/140

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field work

u/41407

Awesome! I managed to shorten it down to 129 if you want to add something to it: v=160;s=20;for(i=60*v;i--;l=(i%v))m=(i/v)|0,k=1+S(C(l/15)/C(m/17)+t*4),x.fillStyle=R(n=k*v+m*2,n+m,n+k*v),x.fillRect(l*s,m*s,s,s)

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function u(t) {

x.drawImage(c,i=0,8);a=t?a:[...S+0].map(p=>p<'_'),b=[];while(i<240)d=b[i]=a[i-1]^a[i+1],x.fillStyle=R(g=!d<<8,g),x.fillRect(i++*8,0,8,8);a=b

Feb 3 2018 3:34 PM UTC

}// 140/140

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jonathan_b

remix of d/6672 by u/BirdsTweetCodersDweet

function u(t) {

t?0:s=0;for(c.width|=a=4e2;a--;x.stroke())x.beginPath(),x.ellipse(980+300*C(a),500+250*S(S(a*2+s)),600+10*S(a),150+100*C(a+s),0,0,7),s+=1e-4

Feb 3 2018 7:42 AM UTC

}// 140/140

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jonathan_b

remix of d/6681 by u/BirdsTweetCodersDweet

function u(t) {

with(x)for(c.width=a=2e3;a-=8;beginPath(fill()))fillStyle=`hsl(${d=C(a*2)*50},90%,50%,10%`,ellipse(960+700*C(a+t),480+d*4,90+d/3,90+d,0,0,7)

Feb 3 2018 9:06 PM UTC

}// 140/140

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u/hells-fargo

i see this whenever i start up my vr headset

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Jezza

function u(t) {

c.width|=0;x.font='99px monospace';if(!t)p=3,a=2,o=0,q=2;p+=24/a/(a+1)/(a+3)/(a+=4);x.fillText((p+o).toFixed(15),9,99);if(p>q)p-=q,o+=q;q/=2

Jan 31 2018 10:32 PM UTC

}// 140/140

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I thought I'd see if I can calulate PI in 140 chars. Math.PI is 3.141592653589793, which is 15 decimal places. 15 decimal places is precise enough to calculate the circumference of the solar system (including Pluto) with an accuracy of a meter. The formula is Nilakantha's from the 15th century. You could also just print 245850922/78256779 but doing that doesn't seem much better than just printing Math.PI.

u/donbright

#pi #math

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21medals

remix of d/6619 by u/21medals

function u(t) {

for(c.width|=i=80,x.globalCompositeOperation="xor";i--;x.ellipse(960,r=540,(S(t+S(i)/2)*r+r)/8,r,t/4+.0785*i,0,6.28),x.fill())x.beginPath()

Feb 1 2018 10:28 PM UTC

}// 140/140

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