Dweets awesomed by u/pavel

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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donbright

remix of d/1871 by u/walsh9

function u(t) {

圈=(n,d,N,D)=>{d+D<15?(圈(n,d,n+N,d+D),圈(n+N,d+D,N,D),w=2e3,m=d+D,x.beginPath(),r=w/m/m/2,x.arc(w*(n+N)/m,r,r,0,7),x.fill()):1}
圈(0,1,1,1)

Mar 7 2017 11:35 PM UTC

}// 136/140

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basic Ford's Circles (sort of like Apollonian Circle Packing but every circle touches the floor, or here, the ceiling)

u/donbright

#math
u/donbright

see also https://www.dwitter.net/d/15086 by @taupelink
u/donbright

#numbertheory
u/taupelink

nice!

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FireFly

function u(t) {

for(c.width|=A=16,i=9e3;i--;(X&8?B&2:"<fnvff<Ā~``x```".charCodeAt((B/A&3)*8+Y%8)>>7-X%8&1)&&x.fillRect(A*X,A*Y,A,A))X=i&127,Y=i>>7,B=X+Y+t*8

Mar 6 2017 8:36 PM UTC

}// 140/140

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00FF. More embedded bitmap fun :)

u/iverjo

Cool!
u/sfz

Going to take a three month sabbatical and figure out how this works.
u/FireFly

Anything in particular that I should explain? It might help to draw the bits of the codepoints in the string literal on a piece of paper, as an 8×15 grid (15 chars, 8 bits per char). Ā is U+100, used to encode 0x00.
u/sfz

Neat trick!

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veubeke

function u(t) {

for(i=1920;a=i--/400;x.fillRect(i,400+t*70+_*15,1,99))_=C(a+t)*3+C(a-t)*8+(r=i*i/t%1),
x.fillStyle=`hsl(${140-t*4+_},80%,${40-t*2-_-r*9}%)`

Mar 5 2017 5:05 PM UTC

}// 140/140

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Show more comments…
u/iverjo

Nice :) This reminds me of the classic Windows XP desktop background image
u/sigveseb

very nice! can we squeeze in a blue sky?
u/veubeke

I’m trying ^^
u/magna

Not enough Unicode cows. Back to work!
u/Beginner

Amazing!
u/FENRIR

windows xp start up sound went to my head
u/iverjo

#grass
u/joeytwiddle

#landscape
u/vain

Cool and interested way to draw this landscape!

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sebbert

function u(t) {

c.width=999;for(a=b=z=0,w=140;z<400;z+=.1)a=S(a*2.4-t)*S(t*2)+C(a+b+t)+C(z*2.34+t),b=C(z*1.56),x.fillRect(a*w+500,b*w+w+w,2,2)

Mar 4 2017 12:59 AM UTC

}// 126/140

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u/donbright

woah!
u/SpecialAgent

Energize!
u/FireFly

This one is really cool o.o
u/FireFly

I would love an explanation or pointer about the maths going on here… in particular I don't understand why the 1.56 constant for the b= is so sensitive. It looks like an approximation of π/2, but all of π/2, 1.57 and 1.5 behave vastly differently/more chaotically. So what's the relationship between these numbers/how is 1.56 derived?
u/tapgiles

What the... @.@ Looks so detailed!
u/joeytwiddle

Some other constants with similar behaviour: 1.17, 2.34, 3.12, 3.51, 3.90, 4.68, 6.24
u/joeytwiddle

And a few with different behaviour: 3.08, 6.05 (!), 6.35

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hamptonio

remix of d/123 by u/icecuber

function u(t) {

t?i++:i=0;for(j=1e3;j--;){a=b=0;k=256;for(;k--&&a*a+b*b<4;)c=a*a-b*b+i/1e4,b=2*a*b+j/1e4+.6,a=c;x.fillRect(i,j,1,S(k))}

Feb 26 2017 9:48 PM UTC

}// 119/140

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u/iverjo

Worth the wait
u/hamptonio

Yeah its pretty damn slow.
u/KHymatim

Mmmmm
u/iverjo

#fractal

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HeyJD

function u(t) {

c.width^=0;r=480;for(θ=44/7;θ>0;θ-=.7/(C(t)+1))for(φ=p=11/7;φ>-p;φ-=1/r)x.lineTo((C(t)*S(φ)-S(t)*C(φ)*S(θ))*r+r*2,C(φ)*C(θ)*r+r);x.stroke()

Feb 26 2017 5:46 PM UTC

}// 140/140

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You can change the ".7" number to be a lower number like .2 to increase the number of segments in the sphere.

u/donbright

brilliant

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sigveseb

remix of d/271 by u/3bl3gamer

function u(t) {

W=c.width=255;for(i=9<<12;a=i&W,b=i>>8,n=b-45,m=a-99,i--;x.fillRect(a,b,A=1/(((t+a/n)%2)^b/n),A))n*=(B=(W*S(t*29+n/5)+m*m+n*n)/5e3)<1?C(B):1

Feb 24 2017 12:35 AM UTC

}// 140/140

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Based on some of 3b3lgamer's stuff (remix link got broken).

Show more comments…
u/donbright

dude you are the king,.. O M GOSH
u/Renaud___

Fantastic :S
u/lionleaf

Fixed the remix link for ya :)
u/nashcat

holy sh*t
u/Kalanchoe

H...how? This is so impressive.
u/magna

Needs more music.
u/xem

inhuman
u/donbright

still the one that blew my mind the most.
u/lionleaf

#wobble #wobbly #water #mirror #checkerboard #refraction #sphere
u/Xaotic

wtf
u/firegodjr

#raytracing #best
u/stiaje

#witchcraft
u/sigveseb

This one used to be fast, wonder why it is slow now?
u/ximavus

OMG RAY CASTING DUDE

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iverjo

remix of d/464 by u/iverjo

function u(t) {

for(j=1080;j--;){a=b=0;for(k=35;k--&&a*a+b*b<4;a=c)c=a*a-b*b+t*6e-10-1,b=Math.abs(2*a*b)+j/1e11-1;x.fillRect(t*60,j,1,S(k/9))}

Feb 23 2017 5:10 PM UTC

}// 126/140

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Burning ship fractal. Feel free to play with the parameters to find other interesting locations in the fractal

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sigveseb

remix of d/407 by u/sigveseb

function u(t) {

for(n=c.width=i=1e3,s=S(t),k=C(t);i--;x.lineTo(n*X/Z,n*Y/Z))F=S(i),U=C(i),V=(i&7)-3,_=V*s+F*k,Z=V*k-F*s+15,X=_*k-U*s+7,Y=_*s+U*k+3;x.fill()

Feb 22 2017 9:37 PM UTC

}// 140/140

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u/donbright

that is unbelievable cool
u/iverjo

This one is best viewed in Chrome
u/magna

Nanotube
u/sigveseb

#material
u/joeytwiddle

Could be a dune heighliner #shiny
u/stiaje

#witchcraft
u/joeytwiddle

#hiddengem

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mxfh

remix of d/683 by u/mxfh

function u(t) {

r=480;c.width=r*4;λ=0;for(φ=a=Math.PI/2;φ>-a;φ-=1/r){λ+=a;x.lineTo(C(φ)*S(λ-t)*r+2*r,(C(t)*S(φ)-S(t)*C(φ)*C(λ-t))*r+r)}x.stroke()

Feb 22 2017 1:12 PM UTC

}// 129/140

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