Dweets awesomed by u/f8f82804

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.

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Current theme challenge: #Food

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rodrigo.siqueira

remix of d/12001 by u/thorbear

function u(t) {

X=t/6;Y=2;s=999;x.globalAlpha=.05;for(i=3e3;i--;)
Y=1.66-2*(.1*X-S(1.2*Y)),
x.fillRect(X*s,Y*s-700,3,3)

Jan 31 2019 2:25 PM UTC

}// 103/140

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Bifurcation diagram attractor of the logistic map. xₙ₊₁ = r * xₙ(1-xₙ). Bifurcation diagrams enable the visualization of bifurcation theory. #fractal

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sam

function u(t) {

x.fillRect(0,0,2e3,2e3);for(i=5e3;i--;Z=170-(t*60+i)%160,s=280/Z,x.clearRect(960+1/Z*(-99+i*3e72%199)*900,540+(-70+i*8e01%140)/Z*700,s,s));

Jan 31 2019 12:10 PM UTC

}// 139/140

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u/katkip

#starfield #stars #space #d3
u/cantelope

reciprocals tho: 960+1/Z*(-99+i*3e72%199)*900 -> 960+(-99+i*3e72%199)/Z*900
u/cantelope

might have been good to reference the source: d/2336

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joeytwiddle

remix of d/12000 by u/yokljo

function u(t) {

for(c.width|=j=20;j--;)for(g=j*120,i=99;i--;)x.fillRect(i?g+i/30*S(1e3/i-t*8+j*j*400)*i/2:g,i?i*5+600:0,120+60*S(j*j*(t|1)),i?5:600)

Jan 31 2019 6:22 AM UTC

}// 132/140

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A little remix of yokljo's city river

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u/katkip

Huh nice
u/joeytwiddle

Scrolling instead of switching: for(c.width|=j=15+t|0;j-->t;)for(g=(j-t)*180,i=99;i--;)x.fillRect(i?g+i*S(1e3/i-t*8+j**3):g,600+!!i*i*5,-99-80*S(j*j),i?3:-600)
u/username

What is this supposed to be? I only see black squiggly lines..
u/joeytwiddle

I think it's supposed to be buildings reflect in water. for(c.width|=j=20+t|0;j-->t;)for(g=(j-t)*120,i=W=99;i--;)x.fillRect(i?g+i*i/70*S(1e3/i-t*8+j**3):g,500+!!i*i*4,-W-80*S(j*j),i?3:-300-W*S(j))
u/donbright

oh my god
u/joeytwiddle

Please give u/yokljo an upvote. I only tweaked their idea! #water #waves
u/Tekmap

👏👏👏
u/vain

cool fx

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thorbear

function u(t) {

a=b=t;s=400;x.globalAlpha=.05;for(i=2e3;--i;)x.fillStyle=R(s*a*b,0,i),x.fillRect(960+a*s,540+b*s,5,5),a=S(2*b)-C(5*a),b=S(-2*a)-C(3*b)

Jan 30 2019 11:52 PM UTC

}// 134/140

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dejong

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u/rodrigo.siqueira

Great!! This is the famous Clifford Pickover Attractor!! It appears in his book Chaos in Wonderland (by the way, I am cited in this book as a fractal poet). Many beautiful variations of this Attractor can be made by changing only 4 parameters. #fractal
u/katkip

I don't understand
u/SMON

I wonder what's going on here. Is there any way to understand this? :)
u/thorbear

Didnt know about Clifford. Used the formulae on P.Bourkes page: http://paulbourke.net/fractals/peterdejong/
u/thorbear

He also has one on the Clifford attractor under /fractals/clifford
u/robbyg

Well done with the #attractor -- I didn't get color in mine: https://www.dwitter.net/d/8503
u/rodrigo.siqueira

Similar to #pickover attractor

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yokljo

function u(t) {

c.width|=0
for(j=0;j<20;j++)for(g=S(j*j*400)*900+940,i=99;i>-120;i--)x.fillRect(i<0?g:g+S(i/3+t*8)*i/2,i*5+600,90,5)

Jan 30 2019 11:07 PM UTC

}// 116/140

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u/joeytwiddle

Nice! #water I tried g+S(1e3/i+t*8)*i/2

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yokljo

remix of d/11997 by u/yokljo

function u(t) {

x.fillRect(0,0,2e3,2e3)
x.globalAlpha=.2
for(i=9*t+200;i>0;i-=.28)x.clearRect(C(t+i*3)*900+950,S((t/6+i)*5)*400+500+i/5,9,9)

Jan 30 2019 10:54 PM UTC

}// 124/140

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katkip

function u(t) {

x.globalAlpha=.01;t/=9;for(i=50;i--;)for(j=50;j--;)x.fillStyle=R(i*5,0,j*5),x.fillRect(960+C(i+t)*j*999/j,540+S(i+t*i)*999/j,20,20)

Jan 29 2019 6:01 PM UTC

}// 131/140

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Energy Ray

u/mxfh

with alpha R it's down to 117, or is there a visual difference?
u/katkip

Idk, random coding

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metamero

remix of d/11785 by u/metamero

function u(t) {

i=(t-2)*2|0
x.fillStyle=i^4&i?i>4?R():'#F7A8B8':'#55CDFC'
i^2&&x.fillRect(0,216*i,2e3,216)
x.fillText((x.font='499px ⚧')[6],766,716)

Jan 29 2019 4:10 PM UTC

}// 132/140

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Dia da Visibilidade Trans #pride

u/metamero

today is Transgender Pride Day on Brasil

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rodrigo.siqueira

remix of d/11965 by u/pavel

function u(t) {

for(x.fillRect(0,0,i=3e3,i);Q=S(--i*i);x.clearRect(960+150*(S(b)*4+S(i+t)*Q),540+150*(C(i*i)-(t%4>2?T(b+t):S(b+t))),4,4))b=i%6+t+(t%2>1?0:i)

Jan 28 2019 2:40 PM UTC

}// 140/140

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Torus, spheres, flow and bubbles

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u/rnbw

now THIS is a demo!
u/katkip

Yeah he win
u/13thptr

woah
u/joeytwiddle

Superb! Golf the end with i*(t%2>1) or i*!(t&1)
u/rodrigo.siqueira

Thanks @joeytwiddle for the golf trick. i*(t&1) also works and it's even shorter. And I found that t%4>2?... can be converted to t&2?... It works as a counter to change the function each 2 seconds.
u/yonatan

Also, since T and S take the same arguments (t%4>2?T(b+t):S(b+t)) can be (t&2?T:S)(b+t)
u/lionleaf

Wow! Now we're talking
u/vain

Wow, three fx in this tiny code? Great!

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f8f82804

remix of d/11962 by u/f8f82804

function u(t) {

c.width=32;d=new Date/1e3%86400;j=120;do{"縿Ϡ庽纵粇皷皿簡线粧碾⪿䘮㨿嚿ᒿ".charCodeAt(d&15)&1<<--j%20&&x.fillRect(2+j/5|0,j%5+7,1,1)}while(j%20|0||(d>>=4))

Jan 27 2019 11:04 PM UTC

}// 140/140

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#hex #clock -- shows count of seconds since #UTC midnight (ignoring leap second corrections since epoch)

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