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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3bl3gamer

function u(t) {

eval(new TextDecoder('utf-8').decode(new TextEncoder('utf-16').encode(`⹣楷瑤㵨㤱〲昻牯椨〽椻㤼椻⬫笩⹸楦汬敒瑣㐨〰椫ㄪ〰匫琨⨩〳ⰰ〴ⰰ〵㈬〰紩砻昮湯㵴㤧瀹⁴牁慩❬砻昮汩呬硥⡴䌧敨正漠瑵挠摯⁥债Ⱗⰰ〱⤰`)))

Jul 21 2016 11:33 PM UTC

}// 140/140

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u/sigveseb

Nice, is the compression worth the bootstrap overhead?
u/iverjo

Crazy stuff. How does it work?
u/3bl3gamer

No, it does not. Decompressor doubles characters number, but takes 75 characters by itsef. So no profit, just making some unreadable code even more unreadable :-)
u/3bl3gamer

It works by converting N utf-16 characters to N*2 bytes and then converting this N*2 bytes to N*2 utf-8 characters. This N*2 characters is JS code.
u/iverjo

A for effort

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elrod

function u(t) {

c.width=120;for(j=5;j--;)for(i=5;i--;)x.fillRect(i*25,j*7,20,5);x.fillRect(47+15*S(t*8),60,25,5);x.arc(60,12*S(t*6)+47,2,0,6);x.fill()

Jul 22 2016 12:25 PM UTC

}// 134/140

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New_Core

function u(t) {

g=150;w=c.width=1920;x.font=g+"px s";x.fillText("NEW CORE",g,g);for(i=g;i--;)d=S(t+i*0.01)*g,x.drawImage(c,d,i,g*9,1,w+t%35*-g,500+i,w,1);

Jul 22 2016 11:35 AM UTC

}// 138/140

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u/sigveseb

Very cool technique!
u/iverjo

Agreed
u/13thptr

#text

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iverjo

remix of d/276 by u/iverjo

function u(t) {

c.width=500;x.translate(250,95);M=(3*S(t*2)-1)/2;for(j=66;j--;)x.translate(9,0),x.rotate(M*.1+(1-M)*((j+8)%21?0:2.1)),x.lineTo(0,0),x.fill()

Jul 21 2016 1:10 AM UTC

}// 140/140

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I name it "morphalicious" :P

u/iverjo

#morph

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sigveseb

remix of d/230 by u/3bl3gamer

function u(t) {

c.width=500;for(a=2,j=9;a=-a,x.beginPath(),j--;x.stroke())for(i=0;i<7;i+=.01)r=18-a+S(i*9+t*a)*3<<1,x.lineTo(j*63+r*C(i),(j+t)%9*36+r*S(i))

Jul 19 2016 11:55 PM UTC

}// 139/140

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3bl3gamer more of them :D

u/iverjo

lol, this was bound to happen :D
u/3bl3gamer

wow, it even smaller!
u/katkip

#gears

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iverjo

function u(t) {

c.width=198;x.translate(99,56);for(i=0;i<6.3;i+=.01)r=50*S(i*8*S(t/9)),x.lineTo(r*C(i),r*S(i));x.stroke()

Jul 20 2016 3:16 AM UTC

}// 105/140

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I just discovered that mathematicians call this a rose. See https://en.wikipedia.org/wiki/Rose_(mathemat…

u/iverjo

#rose #flower

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iverjo

function u(t) {

c.width=500;x.translate(250,40);M=(1+S(t*2))/2;for(j=66;j--;)x.translate(9,0),x.rotate(M*.1+(1-M)*((j+6)%16?0:1.57)),x.lineTo(0,0),x.fill()

Jul 20 2016 11:31 PM UTC

}// 139/140

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#morhp

u/iverjo

I meant #morph

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sigveseb

remix of d/308 by u/b4rc0ll0

function u(t) {

a=Math.random;x.f=x.fillRect;t||(W=999,X=Y=U=V=5),U+=a()-.5;V+=a()-.5;x.f(X,Y,9,9),x.f(Y,X,9,9),X+=U,Y+=V,U*=.99,V*=.99,X=(X+W)%W;Y=(Y+W)%W

Jul 22 2016 2:51 AM UTC

}// 139/140

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This is http://dweet.dwitter.net/id/308?autoplay=1 with velocity-based motion.

u/b4rc0ll0

it's the same , i compute a random orientation for the velocity and than apply S and C of it to the point
u/iverjo

b4rc0ll0: This dweet doesn't use S and C. Instead it has variables U and V for horizontal and vertical speed respectively. This makes the speed dynamic. Interestingly, this technique also yields more diagonal motion.
u/Zolden

oh, nice to know someone had similar idea
u/iverjo

#random

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PhiLho

function u(t) {

c.width=400;for(i=0;i<42;i++){b=10+i*4.7;x.beginPath();x.moveTo(0,b);for(j=0;j<22;j++){x.lineTo(i+j*16,b+C(j+16+t%7)*i/2);x.stroke()}}

Jul 21 2016 12:29 PM UTC

}// 134/140

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sigveseb

function u(t) {

N=x.shadowBlur=1e3;x.fillStyle=x.shadowColor=R((1+S(t))*127,(1+S(t+1))*127,(1+S(t+2))*127);x.fillRect(960+S(t)*N*C(t/9),540+C(t)*299,99,99)

Jul 19 2016 9:53 PM UTC

}// 139/140

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u/iverjo

Nice blur!