Dweets awesomed by u/joeytwiddle

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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prawnwarp

function u(t) {

function r(){return Math.random()*255;}a=960+960*C(t);b=540+540*S(t*.9);x.fillStyle=R(r(),r(),r(),.05);x.fillRect(a,b,1920-2*a,1080-2*b);

Apr 19 2017 2:51 AM UTC

}// 137/140

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Polyducks

function u(t) {

x.fillRect(0,0,1920,1080)
x.font = "60px A"
W=S(t)*600;H=T(t/10)*200;for(i=0;i<20;)x.fillText("👾",((100*(++i%5))+700)+W,(100*(i%4))+200+H)

Apr 18 2017 6:42 PM UTC

}// 139/140

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SPACE INVADERS

u/Polyducks

Weird... I wonder why it's stopped working...
u/magna

It still works for me. macOS + Chrome.
u/joeytwiddle

MacOS and Chrome here. The unicode char (was it 👾?) appears to get stripped while loading. If I paste it in between the "", then it works. Perhaps Dwitter loads differently on different pages?

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MrM@_S

function u(t) {

if(!t)c.width-=d=i=400
onkeydown=e=>{r=e.keyCode;d+=r==65?-1:r==68?1:0;i+=r==74?-1:r==76?1:0;if(r==32)c.width^=0}
x.fillRect(d,i,3,3)

Apr 18 2017 12:52 PM UTC

}// 133/140

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etch-a-sketch A and D as the left knob and J,L as the right knob. Space for a clear

u/Polyducks

This is so smart! Have you drawn anything with it?
u/MrM@_S

sort of...but not anything that great
u/joeytwiddle

Very cool!

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Polyducks

function u(t) {

c.width=1920
x.fillRect(0,0,1920,1080)
x.fillStyle="#AAAAFF"
for(i=0;i<20;i++){
  a=T(t+i)*10
  x.fillRect(888*i%1920,a,20,a)
}

Apr 18 2017 8:33 AM UTC

}// 127/140

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*RAIN DROPS*

u/magna

*JAW DROPS*
u/Jenky

Like melting ice :o
u/Polyducks

Aww thanks you guysss!

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neo

function u(t) {

v=255;x.arc(c.width/2+700*S(t*6.75),c.height/2+500*C(7.11*t),0,0,0);x.fill();x.fillStyle=R((v+v*C(2*t)),(v+v*S(1*t)),(v+v*S(5*t)),0.03)

Apr 18 2017 3:47 AM UTC

}// 135/140

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u/Polyducks

Wow! There's so many patterns

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magna

remix of d/1480 by u/magna

function u(t) {

c.width|=0
x.font='50px monospace';
(u+'')
.slice(0,t*3+S(t)*5)
.concat(t*2&1?'|':'')
.split('\n')
.forEach((s,i)=>x.fillText(s,0,++i*50))

Apr 18 2017 1:55 AM UTC

}// 138/140

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Pair programming nightmare

Show more comments…
u/joeytwiddle

that title made me Lol :D
u/sigveseb

:D
u/Jenky

That's a really clever illusion, love it
u/magna

Heh, thanks! Brought it down to 123 chars in hopes of adding occasional mistakes like skipped characters / typos etc., but couldn't immediately find a way. In case anyone wants to give it a shot: https://www.dwitter.net/d/2522
u/donbright

:o
u/Polyducks

Could you make a random function to skip odd spaces?
u/magna

It has to be a deterministic PRNG so that the places that are skipped are persistent. Otherwise, it would just look like a random flipping of characters. I thought about it, but couldn't immediately find a short solution.
u/Polyducks

That's a great point. Dwitter is such a mind twister!
u/highfestiva

Groovy baby!
u/magna

#quine
u/joeytwiddle

#funny

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eruonna

function u(t) {

a=[0,-9,0,9,0]
if(!t){n=0;d=0;b=380;c=830;x.moveTo(a,b)}
d+=((n&-n)<<1)&n++?1:3;d%=4
b+=a[d];c-=a[d+1]
x.lineTo(b,c);x.stroke()

Apr 17 2017 10:36 PM UTC

}// 127/140

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Totally different dragon curve implementation with 13 fewer bytes and it correctly draws the first segment

u/eruonna

okay, not sure if it is worth kicking out yet another version to get the positioning right
u/eruonna

okay, not sure if it is worth kicking out yet another version to get the positioning right
u/donbright

color - - a=[0,-9,0,9,0] if(!t){n=0;d=0;b=380;c=830} d+=((n&-n)<<1)&n++?1:3;d%=4 b+=a[d];c-=a[d+1] x.fillStyle=R(128+n%256,64+n%128) x.fillRect(b,c,9,9)

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eruonna

function u(t) {

c.width|=0
t?o.push({x:960,y:540,X:C(t*9),Y:S(t*9)}):o=[]
o.map(p=>{x.fillRect(p.x,p.y,9,9),p.x+=p.X,p.y+=p.Y})
o=o.length<999?o:[]

Apr 17 2017 8:33 PM UTC

}// 131/140

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u/donbright

great minds think alike https://www.dwitter.net/d/2159

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hscells

function u(t) {

w=c.width=1920;s=32;for(i=0;i<w;i+=s){for(y=0;y<c.height;y+=s){x.fillStyle=`hsl(${i+y*t},99%,70%)`;x.fillRect(i,y,s,s)}}

Apr 17 2017 5:19 AM UTC

}// 120/140

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u/sigveseb

Pretty colors!

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donbright

remix of d/2495 by u/joeytwiddle

function u(t) {

t?s=2e3/c.clientWidth:(a=b=B=A=1,k=j=2)
K=k-a
J=j-b
Q=K**2+J**2
x.fillRect(a+=A+=K/Q,b+=B+=J/Q,9,9)
onmousemove=e=>(k=e.pageX*s,j=e.pageY*s)

Apr 15 2017 10:43 PM UTC

}// 140/140

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mouse = gravitational body (explanation https://www.patreon.com/posts/simulating-in-… )

u/joeytwiddle

Nice :) For a few spare bytes, you could place the body with onclick
u/gabrielsroka

#interactive
u/donbright

#physics

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