Dweets awesomed by u/aleamb

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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Xen

remix of d/2814 by u/the_yuhanna

function u(t) {

x.font='98px t';x.fillText('Xen',918,539);x.fillStyle=`hsla(${t*99},99%,69%,1`;x.drawImage(c,9,9,1911,1001,0,0,1928,1018.9)

Jul 17 2017 11:45 PM UTC

}// 123/140

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tiny tweek from original ;-)

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cantelope

remix of d/2845 by u/cantelope

function u(t) {

A=960,B=540,x.fillRect(0,0,D=2e3,D)
for(i=D;i--;)x.clearRect(A+1/(Z=2.5+C(p=i*C(t/2)/40)*S(q=i/628))*(X=S(p)*S(q))*A,B+C(q)/Z*A,s=69/Z/Z,s)

Jul 10 2017 4:43 AM UTC

}// 140/140

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Show more comments…
u/lionleaf

That's really neat!
u/Polyducks

This is amazing! What's the concept behind it? How are you getting the sphere?
u/cantelope

@Polyducks, it's a golfed version of the equation of a sphere [x=sin(p1)*sin(p2);z=cos(p2);z=cos(p1)*sin(p2);] combined with a tiny 3D projector, X=cx+1/z*x*cx; Y=cy+y/z*cx, where cx/cy is center screen, and x/y/z are the 3D coordinates. Hope that makes sense! :)
u/cantelope

*equation of a sphere: [x=sin(p1)*sin(p2);y=cos(p2);z=cos(p1)*sin(p2);]
u/alien

thanks for that, is projector a mathematical construct? does it have other names?
u/cantelope

@alien it's my own invention, the product of years of research into geometry. I wrote a tutorial with a (very ungolfed) version here https://cantelope.org/3D
u/alien

*__*
u/alien

All the lienar algebra and vectorial calculus in my bachelor finnally comes to life in my head... this is soooo cool @cantelope...
u/donbright

bravo... bravo
u/ximavus

Amazing!

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nystrand

remix of d/2727 by u/joeytwiddle

function u(t) {

c.width|=p=(X,Y=X,S=X,D=15,r=_=>C(t+=S++),k=_=>p(X+S*r(),Y+S*r()/3,S*.8,D-1))=>D&&x.fillRect(X,Y,S,S,x.fillStyle=R(k(),k(),S*D,.01));p(580)

May 16 2017 12:19 PM UTC

}// 139/140

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u/yonatan

#clouds

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nystrand

remix of d/2727 by u/joeytwiddle

function u(t) {

c.width|=p=(X,Y=X,S=X,D=16,r=_=>C(t+=S*D+t/8e6),k=_=>p(X+S*r(),Y+S*r()/3,S*.8,D-1))=>D&&x.fillRect(X,Y,S,S,x.globalAlpha=.01)&k()&k();p(580)

May 16 2017 10:12 AM UTC

}// 140/140

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u/joeytwiddle

Thank you for this :)
u/magna

WOW
u/donbright

damn
u/joeytwiddle

I learned 5 different tricks from your golfing here!
u/iverjo

#clouds
u/jdspugh

Amazing!

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nystrand

remix of d/2564 by u/nystrand

function u(t) {

for(l=c.width|=a=C(t);l--;x.fillRect((k-a*i-a*j*S(t)+6)*z*9,(i+j*S(t)+a*k+4)*z*9,z-9,z*i^5))i=a*S(l),k=3+C(l),j=S(p=l/98)*k,k*=C(p),z=17-a*j

Apr 24 2017 6:35 PM UTC

}// 140/140

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u/donbright

these blow my mind
u/iverjo

#torus

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nystrand

remix of d/1968 by u/nystrand

function u(t) {

for(l=c.width|=a=C(t),b=S(t);l--;x.fillText(i*z^39,(k-a*i-b*a*j)*z+899,(i+b*j+a*k)*z+500))i=a*S(l),k=3+C(l),j=S(p=l/79)*k,k*=C(p),z=99-a*j*9

Apr 23 2017 5:49 PM UTC

}// 140/140

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u/donbright

best dwitter torus?
u/sigveseb

nice!
u/keithclark

Why not use x.fillRect((k-a*i-b*a*j)*z+899,(i+b*j+a*k)*z+500,6,6)? it renders faster and is smaller
u/mxfh

Print and connect the dots. Or do it on screen for lasting impact.

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magna

remix of d/2545 by u/prawnwarp

function u(t) {

c.width|=0;for(i=0;i<1920;i+=64){for(j=0;j<1080;j+=64){x.fillStyle=`hsla(${i*j},50%,50%,.3)`;s=S((t*T(i&j^t)))*64+64;x.fillRect(i,j,s,s);
}}

Apr 22 2017 5:02 PM UTC

}// 140/140

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u/joeytwiddle

Very pretty! It reminds me of this awesome 256b: https://linusakesson.net/scene/a-mind-is-bor…

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magna

remix of d/2516 by u/magna

function u(t) {

c.width|=0
x.font='50px monospace';
((u+'').slice(0,t*3+S(t)*5)+' |'[t*2&1]).split('\n').map((r,i)=>x.fillText(r,0,++i*50))

Apr 18 2017 12:29 PM UTC

}// 123/140

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Slimmer version of "pair programming nightmare"

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u/magna

Challenge: Add occasional mistakes like skipped characters / typos etc.
u/Polyducks

I'm struggling to understand how this works. Where have you got the function input from? Amazingly realistic!
u/Jenky

It's from (u+'') - afaik, it's basically a short/cheat way of converting anything to a string in JS :D
u/Jenky

Also, down to 119 and whole string within canvas - https://www.dwitter.net/d/2524
u/magna

@Jenky Nice!
u/magna

#quine

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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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joeytwiddle

remix of d/2491 by u/New_Core

function u(t) {

t?x.fillRect(a+=9*C(d),b+=9*S(d),9,9):a=b=k=j=0
d=Math.atan2(j-b,k-a)
s=2e3/c.clientWidth
onmousemove=e=>(k=e.pageX*s,j=e.pageY*s)

Apr 15 2017 3:40 PM UTC

}// 130/140

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Woodmouth's ant chasing your mouse

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u/joeytwiddle

Since I couldn't fit the edge detection, I stop the ant when it reaches the target. So I stored the target in k,j
u/donbright

this mouse technique is excellent
u/joeytwiddle

To make him a slow turner: D=(Math.atan2(j-b,k-a)-d+3.14)%6.24-3.14;d+=.05*D
u/joeytwiddle

err I mean 6.28
u/Woodmouth

That's impressive. The slow turn was exactly what i was looking for, but that is sadly just a bit too big.
u/MrM@_S

K=3.14;d+=((Math.atan2(j-b,k-a)-d+K)%6.28-K)/20
u/iverjo

#interactive

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