Top dweets of all time

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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rodrigo.siqueira

remix of d/12440 by u/rodrigo.siqueira

function u(t) {

t||(a=b=0)
for(i=5e3;i--;)x.fillStyle=R(C(a)*200,S(a)*b/3,t*42),x.fillRect(960+b*S(a*.8),540-b*C(a*.8),1,1),a+=1.9*C(2.5*a)+C(t/5),b+=.00076

Jul 7 2019 9:15 PM UTC

}// 140/140

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Feigenbaum Flower. Homage to Mitchell Feigenbaum (1944-2019). He demonstrated the universal character of dynamical non-linear systems, which has made possible the systematic study of chaos. In 1975, using the small HP-65 calculator, he discovered that the ratio of successive distances between bifurcation events tends to a constant δ ≈ 4.66920... This "ratio of convergence" of period-doubling bifurcations is now known as the first Feigenbaum constant. #bifurcation #attractor #fractal #chaos #math

u/taupelink

This is a great tribute. RIP.
u/donbright

really nice
u/artfarnaa

Rodrigo - are you working full time on this fractal stuff? Super impressive if its only a hobby. Great work.
u/rodrigo.siqueira

#tribute

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vinca

function u(t) {

for(t||(Y=0),X=2e3;X--;)x.fillStyle=R(r=255*S(1/S(X/99)+1/C(Y/20)+t),r*S(t)/5),x.fillRect(X,0,1,5);x.drawImage(c,0,5),Y++

May 9 2019 1:23 PM UTC

}// 121/140

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rodrigo.siqueira

remix of d/13206 by u/pavel

function u(t) {

for(i=c.width|=h=1.6+(t<<1);Y=i--%3-1||S(i);x.fillRect(960+S(a+t)*800/r/z,540+Y*800/z,s=18/z,s))a=i%3?i:i*h,r=T(a%h+h/3),z=3+S(t)+C(a+t)/r

Apr 16 2019 2:27 PM UTC

}// 138/140

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Spin particles #d3

u/f8f82804

#perspective

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KilledByAPixel

function u(t) {

for(i=0;i<3e3;)x.fillStyle=R(i%1e3,i%250,i%150,.3+i),j=t*i/9,x.fillRect((S(i)*2e5-j)%2e3-9,(S(i*i)*2e5+j/2)%1080-9,Z=i++?3+9*S(i)**30:1e5,Z)

Apr 13 2019 2:56 AM UTC

}// 140/140

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2D #Starfield I squeezed in more colors and motion blur.

u/13thptr

stylish
u/iverjo

Meteor rain!

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pavel

function u(t) {

for(c.width=i=960;--i;x.ellipse(480,270-56*(j%2-.5)*y,r=32*(64-y*y)**.5,r/2,0,a=(j+t%1)/7,a+!j*7))j=i>>4,y=i%16-8;x.stroke()

Apr 10 2019 8:35 AM UTC

}// 124/140

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#wireframe #sphere

u/f8f82804

#d3
u/Xen

Nice!
u/lionleaf

Nice one! #globe
u/pavel

I use 44 longitude lines so the arc angle between adjacent two is 2*pi/44 which is approximated by 1/7 to 4 decimal places.
u/pavel

Using the famous pi ~ 22/7 approximation.

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marc8

remix of d/12844 by u/marc8

function u(t) {

c.width|=p=-.5
g=(a,b)=>{for(i=6.28;i>0;){z=S(b*t+i*20+a/340)
x.arc(a,550,999+90*(z>p?z>1+p?1+p:z:p),i-=.01,i)}}
g(0,-6)
x.fill(g(2e3,6))

Mar 24 2019 5:23 PM UTC

}// 137/140

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Better shaped gears thanks to your suggestions

u/katkip

Awesome! even if I don't understand anything of the code
u/katkip

#gear
u/Qwitter

Mesmerizing

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pavel

function u(t) {

f=(X,Y,r,a,s,d=1)=>r>.2&&x.lineTo(X,Y)|f(X+C(a-=s/55)*r,Y+S(a)*r,r-r/15,a,s,-d)|f(X,Y,r/3,a+s*d,s*d)
t||f(-60,600,140,0,1)|x.stroke()

Feb 14 2019 10:05 PM UTC

}// 133/140

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Barnsley-like #fern #fractal

u/rep_movsd

#underrated

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joeytwiddle

remix of d/577 by u/iverjo

function u(t) {

for(c.width|=i=99;i--;x.lineTo(1e3+r*S(p)**3,500-r/16*(13*C(p)-5*C(2*p)-2*C(3*p)-C(4*p)),15,15))p=i/16,r=400+99*S(3*t-p/9)**26,x.fill()

Feb 14 2019 1:35 PM UTC

}// 135/140

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u/katkip

Haha! From The Coding Train live
u/iverjo

#heart
u/Galaxtone

Nice job!
u/lionleaf

#valentines

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𭰽𞐶𜀬𮁛𩠽𙱦𪑬𫁒𩑣𭀧𧐨𜀬𜀬𪐽𚁣𛡷𪑤𭁨𯀽𜀩𛁩𚐻𪐭𛐻𮁛𩡝𚁷𚰨𤰨𨠩𚠳𚱓𚁰👩𚡩𚱴𚐪𤰨𬐽𪐪𪐪𪐩𚐯𚁚🐶𚱃𚁢𚐪𜰫𠰨𬀩𚡓𚁱𚐩𚡷𛀵𝀰𚰨𠰨𬐩𛑃𚁢𚱴𚐩𛱚𚡷𛁳🐱𚰱𝐰𛱚𛱚𛁳𚐩𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮰨𨠽𪐥𝠫𭀩𚠶𜁽𛀹𞐥𛀶𝐥𨀻`.replace(/u../g,'')))

Jan 26 2019 7:00 AM UTC

}// 140/140

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for(w=960,x[f='fillRect'](0,0,i=(c.width|=0),i);i--;x[f](w+(S(b)*3+S(p=i*i+t)*S(q=i*i*i))/(Z=6+C(b)*3+C(p)*S(q))*w,540+(C(q)-C(b+t))/Z*w,s=1+150/Z/Z,s))x.fillStyle=hsl(${(b=i%6+t)*60},99%,65%

u/adaq

d

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pavel

remix of d/11472 by u/cantelope

function u(t) {

for(k=c.width|=0;j=--k>>7;x.lineTo(960*(z+4*S(t)+.43*d*((k&120)-62)+S(a))/z,1e3/z))d=.5-(j+4*t&1),z=j+.6-4*t%1+C(a=k%8*d*2.1)*2/3;x.stroke()

Dec 18 2018 11:22 PM UTC

}// 140/140

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k=[4 bits for y][4 bits for x][3 bits for hexagon vertex]

Show more comments…
u/pavel

16*16*8=2048~=1920 so using width
u/pavel

.43~=3**.5/4, 2.1~=2*Math.PI/3
u/pavel

120=0b1111000 so k&120=x*8
u/pavel

I'm using a single stroke and no moveTo. This is a single curve, just lined everything up.
u/pavel

d is horizontal offset, even rows are offset from odd rows. Using +4*t&1 to explicitly cycle the animation every second instead of implicitly cycling every 2 seconds. Longer cycle leads to z<0 and glitches or hexagons that don't reach the camera.
u/magna

Wow!
u/aleamb

awesome!!!
u/pavel

#uncompressed with one plane