Dweets awesomed by u/dull_pixel

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: #Opposites

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smtsjhr

remix of d/18939 by u/smtsjhr

function u(t) {

for(c.width|=i=11;i--;x.fill()){
x.arc(X=210+150*i,540-(b=t%10*200*(u=((5-i>0?5-i:i-5)/10+1)*t%1)*(1-u)),40,0,7)
x.rect(X-30,580,60,1*b)}

May 23 2020 9:18 AM UTC

}// 137/140

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u/katkip

smooth!!

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pavel

function u(t) {

for(let i=2e3,z=(i,j=6)=>j&&Math.max(z(i,j-1),(1/j-(i/540-1.8+C(j))**2-(t/3-1+C(j*j)/2)**2)**.5-S(j)/3||0);i--;)x.fillRect(i,t*180,1-z(i),3)

May 19 2020 5:17 AM UTC

}// 140/140

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#raytracing a baby alien?

u/katkip

kinda #cute
u/yonatan

looks like a teddybear to me
u/andrea270872

Wow! It has a really organic look to it
u/veubeke

If I look at it for longer than 5 seconds, it looks like it’s moving. 😱
u/KilledByAPixel

Congrats, I can see the family resemblance! 😂

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rodrigo.siqueira

remix of d/18558 by u/rodrigo.siqueira

function u(t) {

for(i=2e3,f=(X,Y,n=0)=>Y<9?f(X*X-Y*Y-.8,2*X*Y+.2,n+.16):x.fillStyle=`hsl(${i/9},75%,${n*n}%`;i--;x.fillRect(i,t*60,1,999))f(i/480-2,1-t/9)

May 14 2020 4:15 PM UTC

}// 138/140

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Laser color printing #julia set #fractal

u/sigveseb

Very pretty colors!
u/rodrigo.siqueira

This code stems from original u/Pavel's https://www.dwitter.net/d/18323
u/joeytwiddle

Multibeam: x.fillRect(i,t*60,1,999),Math.random()<.94&&(x.fillStyle='#000',x.fillRect(i,t*60+1,1,999))

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tomxor

function u(t) {

eval(unescape(escape`𫱮𫑯𭑳𩑭𫱶𩐽𩐽🡵𦱥𛡸🠾𝁝🐴𞱦𫱲𚁩🐨𨰮𭱩𩁴𪀽𜠵𝠩𚠴𞱩𛐭𞱘👩𙐳𜠬𦐽𪐯𜐶𛁸𛡦𪑬𫁓𭁹𫁥👒𚁚𚡘𛁚𚠲𝀭𦐪𜰬𜠵𝐩𛁸𛡦𪑬𫁒𩑣𭀨𜰲𚱘𚠴𚱙𛀱𜐲𚱘𛑙𛀴𛀭𦠪𜰩𚑚🐸𚰸𚠨𭑛𪑝👵𦱩𧐪𛠷𚰨𭑛𪐭𜰳𧐫𭑛𪐭𜰲𧐫𭑛𪐭𜰱𧐭𭑛𪐫𝠴𧐩𛰸𯁼𜀩`.replace(/u../g,'')))

May 11 2020 1:03 AM UTC

}// 140/140

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Mmm yeeah, Stick ya Fingas in it !

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u/Xen

nice!
u/joeytwiddle

Pretty #fluid
u/katkip

So beautiful
u/sigveseb

fantastic!
u/aleamb

amazing #interactive
u/PoweredByWill

It's like that lighter-than-air insulation material!

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pavel

function u(t) {

with(x)for(i=999;i--;fillRect(~setTransform(s=24e3/i,0,0,4*s,960-i+9*s*C(a=i+60*t),540+8*s*S(a)),~rotate(T(a*a)),2,2))fillStyle=R(9,i/4,i/3)

May 4 2020 7:34 PM UTC

}// 140/140

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Underwater #cavern

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u/KilledByAPixel

sick
u/KilledByAPixel

looped https://twitter.com/KilledByAPixel/status/12…
u/pavel

One trick here is f();g();h(-1,-1) is the same as h(~f(),~g()) when f and g return a falsy value, undefined in this case.
u/pavel

Notice how none of the distance variables are based on time, only angles are, yet the distances are changing and nothing is rotating...
u/pavel

Try making the moving a little faster :)
u/pavel

After I wrote this I looked for other dweets using a similar technique and this is the earliest one I've found, and it includes an explanation d/10212
u/KilledByAPixel

Amazing work! I have not seen the ~ before, will be using it a lot now. I tried to explain the 60*t trick in one of my blog posts, https://frankforce.com/?p=7160
u/pavel

That is an amazingly detailed explanation with great visual aids.
u/pavel

To clarify your explanation, any integer time works. 60*t is naturally an integer (ish). frame is one char longer without numerical errors. In general, (n*t|0) works for any n.
u/AndrewK

privet
u/katkip

masterpiece
u/joeytwiddle

I think this also counts as a #tunnel
u/Qwitter

Awesome!

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pavel

remix of d/18577 by u/trusktr

function u(t) {

c.parentNode.style='perspective:4in';onmousemove=e=>c.style=`background:tan;transform:rotateY(${e.x-284}deg)rotateX(${160-e.y}deg)scale(.7)`

May 3 2020 2:29 AM UTC

}// 140/140

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Tan plane looking at your mouse

u/pavel

#interactive #mouse
u/pavel

I tried doing this in js but its just too hard to fit!
u/pavel

168 c.width|=onmousemove=e=>T=e;b=.6-T.y/264;e=g=>C(i)*g(1-T.x/264);f=g=>S(i)*g(b)+e(S)*g(b-1.6);for(i=.8;i<6;x.fill(x.lineTo(960+e(C)/z,540-f(C)/z)))i+=1.57,z=(2+f(S))/960
u/pavel

This post looks better with rotation angles divided by 2 but I couldn't figure out how to fit it.

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pavel

remix of d/11930 by u/pavel

function u(t) {

with(x)for(i=-6*t%1;i++<66;fill())for(beginPath(fillStyle=R(8*i,4*i),j=36);--j;arc(960,h+h*S(3*t)**2/i,h/i*(9+C(~~i+6*t^j)),b=9+j/9,b))h=777

May 2 2020 4:35 AM UTC

}// 140/140

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Walking through a #cavern

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u/KilledByAPixel

🤯 genius
u/KilledByAPixel

Looped! https://twitter.com/KilledByAPixel/status/12…
u/sigveseb

Wooow sweet!
u/aleamb

yeah!
u/sigveseb

Really nice colors
u/jick

Holy cow, wow!
u/Xen

sexy!
u/katkip

aannd we have a winner!
u/KilledByAPixel

https://www.reddit.com/r/perfectloops/commen…
u/pavel

the gif is very blurry
u/KilledByAPixel

HD gif for you - https://www.dropbox.com/s/u3wbakb6e4sm00y/pa…
u/Qwitter

Wow!
u/vain

Who needs longer shaders? ;-) Real DemoScene feeling

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lionleaf

remix of d/41 by u/lionleaf

function u(t) {

c.width=2e3;x.lineWidth=9;for(i=0;s=300,a=s/(s-(t+i*s/400)%s),i<400;i++){x.strokeRect(999-a*(1+S(t))/2,500-a*(1+C(t*2))/2,a,a)}

May 1 2020 9:47 PM UTC

}// 127/140

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Basic #cavern #tunnel but missing some organic texture

u/WasifBoomz

This could make for a fun game!
u/lionleaf

test
u/lionleaf

test

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rodrigo.siqueira

remix of d/18458 by u/rodrigo.siqueira

function u(t) {

for(X=f=c=>S(S(9*c/d)*t),Y=t/8-1.1,i=2e3;i--;x.fillRect(i,t*60,(1+f(X=i/480-2)*f(Y))*(d/2+Y),3))x.fillStyle=R(C(r=X*X+Y*Y)*125),d=r>1||T(r)

Apr 23 2020 5:58 PM UTC

}// 139/140

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Red Sphere Reflection #raytracing (high resoluton)

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u/Xen

Tf Dude! top dweet right here 😍
u/lionleaf

That's amazing!
u/lionleaf

#glass #sphere
u/stiaje

#witchcraft
u/Ath0r

Impressive, great job!
u/katkip

genius script
u/PoweredByWill

wow. dwitter povray.
u/mole

I am shooketh. This is absolutely incredible.
u/katkip

#slowrender
u/cli

This is great.
u/Nascretis

Actually insane. #witchcraft

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rodrigo.siqueira

remix of d/18413 by u/pavel

function u(t) {

for(f=c=>S(S(9*c/d)*t),Y=t/3-1,i=2e3;i--;x.fillRect(i,t*180,(1+f(X)*f(Y))*(d/2+Y),3))X=i/480-2,r=X*X+Y*Y,x.fillStyle=R(C(r)*120),d=r>1||T(r)

Apr 23 2020 3:35 PM UTC

}// 140/140

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Red Sphere Reflection #raytracing

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