Dweets awesomed by u/ijbd

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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KilledByAPixel

remix of d/15976 by u/KilledByAPixel

function u(t) {

for(k=i=1e3;--i;x.fillRect(k+S(j=i/k+t/4)*i+S(m=k*j^k)*(r=1e5/i),540+C(j)*i+(z=C(m)<0?C(m):.4)*r,s=6e4/i,s,x.fillStyle=R(++z*99+i*.7,i/3)));

May 5 2020 5:06 PM UTC

}// 140/140

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Lava #Cavern 🌋

u/KilledByAPixel

reposted to tweak the colors :)
u/joeytwiddle

#tunnel

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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

Show more comments…
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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ManualDoCodigo

function u(t) {

c.width=1920;k=20;x.translate(960+S(t)*99,540);for(i=0;i<128;i++){x.fillStyle=R(0,0,0,2/i);x.fillRect(-i*k/2,-i*k/2,i*k,i*k);x.rotate(t/20)}

May 2 2020 9:49 PM UTC

}// 140/140

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u/sigveseb

#cavern

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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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katkip

function u(t) {

eval(unescape(escape`𪑦𚀡𭀩𮱱👛𧐻𩡯𬠨𪐽𜰱𝀱𞱩𛐭𞰩𬐮𬁵𬱨𚁻𮀺𤰨𪐪𜡥𛐳𚐬𪐺𪐪𜡥𛐳𛁹𞡃𚁩𚠲𩐭𜰩𛁡𞠰𯐩𯐊𩡯𬠨𫰠𫱦𘁱𚑸𛡦𪑬𫁒𩑣𭀨𞐶𜀫𫰮𮀪𜠰𜀬𝐴𜀫𫰮𮐪𜠰𜀬𛠵𛀮𝐩𛁯𛡸𚰽𠰨𫰮𨐩𛰵𝐬𫰮𮐫👓𚁯𛡡𚐯𝐵𛁯𛡡𚰽𤰨𫰮𪐪𜰫𫰮𮀪𫰮𮐩`.replace(/uD./g,'')));'test'

Apr 21 2020 11:07 AM UTC

}// 140/140

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u/Xen

sexy

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KilledByAPixel

remix of d/18241 by u/KilledByAPixel

function u(t) {

for(j=99;j--;S=540)for(q=X=j%2?X:A=T(B=T(T=Math.random)*2-1)*3-2,Y=B,i=S;q*X*i--;j%2&&x.fillRect(850-S*X,Y*S+S,.5,1))X=X*X-Y*Y+(Y=2*X*Y+B,A)

Apr 14 2020 5:20 AM UTC

}// 140/140

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Filtered Anti-Buddhabrot #Fractal - Only trapped orbits

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KilledByAPixel

remix of d/17379 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑳🐨𦀬𦐬𬠬𪐽𜀩🐾𮰊𩡯𬠨𩡩𫁬𤱴𮑬𩐽𪰿𙰣𩡦𙰫𪰪𪰺𙰣𜀰𜀱𙰬𨡥𩱩𫡐𨑴𪀨𩡩𫁬𚁡𬡣𚁘𛁙𛁫🱲𞠲𩐳𛀰𛀷𚐩𚐻𪐼𞐻𪐫𚰩𭰽𪐪𬠪𞐬𘑫𯁲🠵𙠦𬰨𦀫𤰨𨐽𪐦𙠲𞐹𚡴𛱷𚱫𚐪𭰬𦐫𠰨𨐩𚡷𛰲𛁫𚰫🱲𚠨𛠶𛑃𚁫𚡫𚐯𝐩𞠹𚐊𯐊𬰨𞐶𜀬𝐴𜀬𪰽𜀩`.replace(/u../g,'')))

Feb 1 2020 4:23 AM UTC

}// 140/140

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Proto Solar System

u/Odog8

real gravity?
u/KilledByAPixel

no, it is faked!

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Piggo

function u(t) {

x.fillStyle=`hsl(${t*150},95%,45%)`;var Z=Math.abs(T(t/3))
for(var X=90;X-=1;)for(var Y=90;Y-=1;)x.fillRect(X*10*Z-50,Z*Y*10-50,9,9)

Dec 19 2019 3:18 AM UTC

}// 132/140

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My first dweet! Tips for working in javascript would be appreciated since I've never used it before

u/jellyedwards

Hey Piggo, to reduce a few chars you don't need var, you can do -- instead of -=1 and you can put some statements in the last term of the from expression, have a look at this that does the same in 116 bytes: Z=Math.abs(T(t/3));for(X=90;X--;)for(Y=90;Y--;x.fillRect(X*10*Z-50,Z*Y*10-50,9,9))x.fillStyle=hsl(${t*150},95%,45%
u/jellyedwards

Hmm the back quotes for removed from the hsl but you get the idea!
u/Piggo

Awesome, thanks for the tips!

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rodrigo.siqueira

function u(t) {

c.width|=0
for(i=4e3,w=960;i--;x.fillRect(w+w*X/Z,w*Y/Z,s=90/Z/Z,s))
X=C(t/5)*C(V=i+t)*3+C(U=i**6),
Y=C(U+t*2)*T(U+t)-2,
Z=S(V)-4+S(t)

May 17 2019 2:24 PM UTC

}// 134/140

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Swarm around the #torus

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pavel

remix of d/11420 by u/cantelope

function u(t) {

j=t?j%6e3:P=[]
for(w=i=150;i--;c.width=-1)P[j++]=[40,8+S(i/4)*C(t*16)*3]
P.map((p,i)=>x.fillRect(w+(i%w-75)*(g=w/p[0]--),p[1]*g,s=g*g/23,s))

Dec 15 2018 7:17 AM UTC

}// 140/140

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u/katkip

#d3 #landscape Nice!!
u/pavel

#uncompressed

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