Dweets awesomed by u/tapgiles

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: #ScaryMovies

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keithclark

function u(t) {

for(a=c.width|=l=C(t),m=S(t);a--;x.fillRect((d*l-e*m)*h+960,(g*l-f*m)*h+520,h/=50,h))d=S(a*92),e=S(a),f=C(a*.7),g=d*m+e*l,h=800/(3+g*m+f*l)

Apr 23 2017 11:33 AM UTC

}// 139/140

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A point cube spinning on two axis with perspective

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u/hscells

this is really nice
u/donbright

great job!
u/magna

Awesome!
u/cantelope

very nice!
u/joeytwiddle

#cube #dots
u/vain

damn cool

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phst

function u(t) {

c.width=1920;
  for(i=0;i<100;i++)
  x.fillRect(100+i*15,400+S(2*t+i)*250,8+S(i)*80,10+C(2*t-i)*100)

Apr 19 2017 2:52 PM UTC

}// 100/140

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Polyducks

function u(t) {

L=(X,Y,X1,X2)=>{x.beginPath();x.moveTo(X,Y);x.lineTo(X1,X2);x.stroke()}
if(t<16){L(S(t)*1000,S(t)*1000,T(t)*1000/S(t),t*100)}

Apr 18 2017 6:04 PM UTC

}// 125/140

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_A stone wall by the sea_

u/Polyducks

I'll work out how to do bold text soon, I swear...
u/tapgiles

The first comment is automatically made bold ;P
u/tapgiles

Looks cool. Wish the line wouldn't disappear for so long, though...

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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

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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){if(i>=0){d=(p[i--]+1)%4;p.push(d);j++;b+=a[d];c-=a[d+1];x.lineTo(b,c);x.stroke()}else i=j}else{p=[0];i=j=0;b=960;c=540}

Apr 17 2017 8:56 PM UTC

}// 140/140

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Works best in full screen, otherwise line is too thin

u/donbright

how does it work ?
u/eruonna

One way to draw the next iteration of the dragon curve is to take the previous iteration and then add it to itself backwards and rotated 90 degrees. Here p is the array of previous steps, j the index of the current step, and i walks backward through p. When i gets to the beginning, we set it equal to j and start over.
u/donbright

thanks, that is fascinating

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New_Core

remix of d/2473 by u/Woodmouth

function u(t) {

onmousemove=e=>{E=-.15+e.pageX/2e3};t?x.fillRect(a+=9*S(d),b+=9*C(d),9,9):b=a=d=500;d+=E
d=b>1080?3:b<0?0:a>1920?5:a<0?2:d

Apr 15 2017 7:09 AM UTC

}// 122/140

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just some fun added, use your mouse.

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u/donbright

i literally laughed out loud playing this
u/joeytwiddle

Brilliant :D
u/Woodmouth

Hmm, there is actually quite a bit of space left. Can anyone make it follow the mose?
u/Woodmouth

Or wait... that would require a lot actually, nvm, i doubt it will be feasible.
u/joeytwiddle

I could get it to chase the mouse but could not keep the edge detection: https://www.dwitter.net/d/2495
u/Woodmouth

The slow turning is exactly what i was thinking of. I've already asked once, but why not again? Is anyone able to compress the last 12 characters in joeytwiddle's 2495 with the slow turn addition?

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z3vin

function u(t) {

w=1920;q=80
for(i=0;i<w;i+=q)for(j=0;j<w;j+=q)x.rotate(t/9),x.fillStyle=`hsl(${i/36*S(t)*5},80%,50%)`,x.fillRect(i,i*S(t),S(t)*2*q+S(t*q),1)

Apr 14 2017 11:04 PM UTC

}// 140/140

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u/donbright

reminds me a bit of impressionist painting

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NMcCoy

function u(t) {

w=c.width=1920
s=50
for(i=s;i<w;i+=s)
for(j=s;j<w/2;j+=s)
{
x.fillStyle=`hsl(${t*39+(j)*.3},99%,70%`
x.fillRect(i,j,S(t+i)*s,S(t+i)*s)
}

Apr 14 2017 10:16 PM UTC

}// 136/140

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