Dweets awesomed by u/KilledByAPixel

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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mxfh

remix of d/23417 by u/mxfh

function u(t) {

for(d=new ImageData(w=2048,w),m=3e6;m--;d.data[m*4-1]=(m-Y&Y+m)*t/w&w)Y=m*w
x.putImageData(d,0,0)

Aug 13 2021 11:51 AM UTC

}// 97/140

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u/mxfh

for(d=new ImageData(w=2048,w),m=1e7;m--;d.data[m|3]=(m-Y&Y+m)*t/w&w)Y=m*w x.putImageData(d,0,0)
u/mxfh

for(d=new ImageData(w=2048,w),m=1e7;m--;d.data[m|3]=(m-Y&Y+m)*t/w&w)Y=m*w x.putImageData(d,0,0)
u/mxfh

-2 but considerably slower

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tomxor

remix of d/23544 by u/pavel

function u(t) {

for(a=Math.abs,c.width&=i=4352;X=1-(T+i/32)%2,Y=--i/2e3;x.fillRect(X*r+64*T,Y*r+96-64*a(S(t)),T=a(2-t%4)+1,(i^i/64)/8&1))r=64/(--Y*Y+X*X+1)

Aug 13 2021 12:57 AM UTC

}// 139/140

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Smoother #Amiga #Ball

Show more comments…
u/tomxor

..But less authentic. Remaps the pixel positions rather than texture, which gives "free" antialiasing, with spare space to correct the spin.
u/pavel

Oh yeah, nice. This is definitely a better way of doing it. The other mapping has an incorrect center that I have to waste characters to correct.
u/pavel

-2 char using S(t%3.14) to bounce and inlining the single Math.abs call
u/danny@hille.dk

What a clever trick, using modulus pi of t, to only get the positive part of the sinus curve
u/danny@hille.dk

3.2 works fine, while 3 and 3.1 looks wrong
u/danny@hille.dk

test code: c.width|=0,x.fillRect(o=860,o-S(t*4%3.2)*o,200,200)

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pavel

remix of d/23537 by u/KilledByAPixel

function u(t) {

for(c.width&=i=4352;Y=i--/2e3;x.fillRect(94+C(t/3)*94+i%64,80-80*Math.abs(S(t))+i/64,2*X/C(r=X*X+--Y*Y)-6*t&1^2*Y/C(r)-6&1,r<1))X=i%64/32-1

Aug 11 2021 8:39 PM UTC

}// 139/140

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Boing

u/DaSpider

That brings back memories.
u/DaSpider

#Amiga bouncing ball
u/tomxor

Nice!
u/tomxor

-1 char X=i/32%2-1

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KilledByAPixel

remix of d/23535 by u/KilledByAPixel

function u(t) {

for(i=4*(c.width=450);i--;x[(t+j+i/350)&1|j>7?'moveTo':'lineTo'](225-C(t/2)*99+(64-i/14)*S(a=j*.4),99+86*C(t)**2+64*C(a)))j=i%9
x.stroke()

Aug 11 2021 2:41 AM UTC

}// 138/140

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Amiga Ball #uncompressed #amiga

u/KilledByAPixel

fixed bounce for(i=4*(c.width=450);i--;x[(t+j+i/350)&1|j>7?'moveTo':'lineTo'](225-C(t/2)*99+(64-i/14)*S(a=j*.4),179-86*S(t%3.2)+64*C(a)))j=i%9;x.stroke()
u/vain

AMIGA !!!!! :D

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mxfh

remix of d/855 by u/mxfh

function u(t) {

r=113;c.width|=w=710;for(λ=φ=a=w/r;λ+=a,φ>-a;φ-=.1)x.arc(C(φ)*S(d=λ-t)*r+w,(S(φ+a/4)*C(φ)*C(d))*r+w,φ**4,0,a)
x.fill("evenodd")

Aug 11 2021 12:33 AM UTC

}// 127/140

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KilledByAPixel

function u(t) {

eval(unescape(escape`󭽩󭍨󚍸󚝦󫽲󚍫󟜶󚬨󨼮󭽩󩍴󪌽󜼰󜌩󛍦󟝟󟜾󫍩󫭥󥍯󚌹󞜫󚌴󜌭󪼯󜬲󚜪󠼨󨜽󜜮󝬭󪬪󛬴󚜬󞌰󚼳󜌪󠼨󭌩󚼴󜌪󤼨󨜩󚜻󪼭󛜻󬽴󬭯󪽥󚌩󚝦󪝬󫍒󩝣󭌨󜜷󞜹󛝫󛌰󛌮󝌬󪼩󛍪󟝫󙜹󛍦󚍢󩝧󪝮󤍡󭍨󚍳󭍲󫽫󩝓󭍹󫍥󟝒󚍶󟜵󜌫󪼯󝌬󭬪󟜨󭌫󪬫󪼯󜼵󜌩󙬱󛍶󚜩󚜬󩬨󛜭󪬩`.replace(/u../g,'')))

Aug 11 2021 12:00 AM UTC

}// 140/140

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Amiga Ball

u/KilledByAPixel

#amiga
u/aleamb

wow!!
u/KilledByAPixel

improved... with(x)for(c.width=300,i=2e3,f=_=>lineTo(99+(40-i/22)*S(a=j*.4),80+30*C(t)+40*C(a));i--;i<1800?stroke():fillRect(0,i-1800,i,.4))j=i%9,f(beginPath(strokeStyle=R(v=i/4,v*=(t+j+i/350)&1,v))),f(--j)
u/KilledByAPixel

smaller... with(x)for(c.width=300,i=2e3,f=_=>lineTo(149+(40-i/22)*S(a=j*.4),80+30*C(t)+40*C(a));i--;i<1800?stroke():fillRect(0,i-1800,i,.4))j=i%9,f(beginPath(strokeStyle=R(v=i,v*=(t+j+i/350)&1,v))),f(--j)
u/vain

AMIGA !!!

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danny@hille.dk

remix of d/23514 by u/danny@hille.dk

function u(t) {

eval(unescape(escape`󨼮󭽩󩍴󪌽󭼽󞜹󞽦󫽲󚍭󟝷󚭷󞽭󛜭󞽸󛭦󪝬󫍓󭍹󫍥󟝒󚍲󟝭󛼸󚽓󚍡󛼹󚜪󤼨󨬯󝬫󭌪󞜫󤼨󨜯󞌭󭌪󜼩󚜪󭼬󬬪󛬶󚜩󩜽󚍘󟜱󛜴󚭭󛽷󛽷󚜪󦌫󚍙󟜭󜬫󝌪󚍭󙝷󚜯󭼩󚭙󛍸󛭦󪝬󫍒󩝣󭌨󨜽󫜥󭼬󨬽󫜯󭼬󜜬󜜭󚍙󚬨󫼽󚌳󛜨󝌭󝜪󩜩󚬪󛬵󚜯󚼫󩜩󚭷󚽴󚭷󙭷󧭘󚭯󚭷󙭷󚜯󭼩`.replace(/u../g,'')))

Aug 9 2021 9:05 PM UTC

}// 140/140

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disco inferno remix - #disco #ball #spere #fire

Show more comments…
u/danny@hille.dk

uncompressed: c.width=w=99;for(m=w*w;m--;x.fillStyle=R(r=m/8+S(a/9)*S(b/6+t*9+S(a/8-t*3))*w,r*.6))e=(X=1-4*m/w/w)*X+(Y=-2+4*(m%w)/w)*Y,x.fillRect(a=m%w,b=m/w,1,1-(Y*(o=(3-(4-5*e)**.5)/++e)*w+t*w&w^X*o*w&w)/w)
u/danny@hille.dk

2 more variants:
u/danny@hille.dk

c.width=w=99;for(m=w*w;m--;x.fillStyle=R(r=m/8+S(a/9)*S(b/6+t*9+S(a/8-t*3))*w,r*.6))e=(X=1-4*m/w/w)*X+(Y=-2+4*(m%w)/w)*Y,x.fillRect(a=m%w,b=m/w,1,1+(Y*(o=(3-(4-5*e)**.5)/++e)*w+t*w&w^X*o*w&w)/w)
u/danny@hille.dk

and
u/danny@hille.dk

c.width=w=99;for(m=w*w;m--;x.fillStyle=R(r=m/8+S(a/9)*S(b/6+t*9+S(a/8-t*3))*w,r*.6))e=(X=1-4*m/w/w)*X+(Y=-2+4*(m%w)/w)*Y,x.fillRect(a=m%w,b=m/w,1,(Y*(o=(3-(4-5*e)**.5)/++e)*w+t*w&w^X*o*w&w)/w)
u/danny@hille.dk

I think this is my favorite:
u/danny@hille.dk

c.width=w=127;for(m=w*w;m--;x.fillStyle=R(r=m/8+S(a/9)*S(b/6+t*9+S(a/8-t*3))*w,r*.6))e=(X=1-4*m/w/w)*X+(Y=-2+4*(m%w)/w)*Y,x.fillRect(a=m%w,b=m/w,1,(Y*(o=(3-(4-5*e)**.5)/++e)*w+t*w&w^X*o*w&w)/w*2)
u/neimad

wtffffffff
u/magna

constraints stoke fire
u/ullo

good

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lewdev

function u(t) {

n=t*10|0
for(i=0;i<100;i++){
x.beginPath();x.moveTo(i*50,n);n=n%2?(n*3)+1:n/2;x.lineTo((i+1)*50,n);x.stroke();}

Aug 9 2021 12:06 PM UTC

}// 111/140

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3x+1 Unsolved Math Problem https://youtu.be/094y1Z2wpJg

u/rodrigo.siqueira

Paul Erdős said about the Collatz conjecture: "Mathematics may not be ready for such problems." He also offered US$500 for its solution. https://en.wikipedia.org/wiki/Collatz_conjec…
u/New_Core

I tried to visualize something with the Collatz Conjecture a few weeks ago but I didnt come up with anything good.. I bet someone can do some nice stuff with it here.
u/lewdev

Yeah, I figured there's a way to build out visuals like the ones in the video. I just did a quick one to get started. Math is a great inspiration for dweets.
u/smtsjhr

neat! some more inspiration for visualizing Collats here: https://youtu.be/RzQE2Q7lsT4

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KilledByAPixel

function u(t) {

t?onkeydown=e=>A.includes(c=e.code)||A.push(c):(A=[],c.outerHTML='<h3 id=z>')
o='';A.sort().map(e=>o+=e+' ')
z.innerHTML=o+'<p>⌨️ '+A.length

Aug 8 2021 10:23 PM UTC

}// 140/140

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Push Every Key ⌨️ #interactive

u/lewdev

Got tricked into pressing F5.
u/KilledByAPixel

lol same thing happened to me.

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danny@hille.dk

remix of d/23513 by u/KilledByAPixel

function u(t) {

c.width=w=98;for(m=w*w;m--;x.fillRect(m%w,m/w,1,(Y*(o=(3-(4-5*e)**.5)/++e)*w+t*w&w^X*o*w+t*w&w)/w))e=(X=1-4*m/w/w)*X+(Y=-2+4*(m%w)/w)*Y

Aug 8 2021 3:43 PM UTC

}// 135/140

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lores #disco #ball #spere remix

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