Dweets awesomed by u/richev

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: #Opposites

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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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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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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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pavel

remix of d/11963 by u/cantelope

function u(t) {

for(x.fillRect(0,0,i=2e3,i);Q=S(q=--i*i);x.clearRect(960*(z+S(b)*3+S(p)*Q)/z,540+960*(C(q)-C(b+t))/z,s=99/z/z,s))z=6+C(b=i%6+t)*3+C(p=i+t)*Q

Jan 26 2019 8:47 PM UTC

}// 140/140

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#uncompressed in black and white

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u/adaq

coolio
u/cantelope

(╯°□°）╯︵ ┻━┻
u/cantelope

this one seems to outperform my original, probably due to all the color calls in mine. One thing I haven't been able to figure out is why the same code performs better on codegolf.tk than dwitter. Not trying to advertise, but it's true and it was just an accidental product of how it was made i guess. E.g. compare d/11913 to https://codegolf.tk/a/366 The code is identical, but on my computer the latter runs visibly smoother. ¯\_(ツ)_/¯ If any plucky ducks want to compare sources, the frontend of codegolf.tk is here https://github.com/srmcgann/codegolf2.0, and the backend: https://github.com/srmcgann/codegolf/blob/ma…
u/rnbw

this is just a wonder to behold
u/joeytwiddle

It's worth investigating cantelope. Someone reported it here: https://github.com/lionleaf/dwitter/issues/4… How can we display framerate on CodeGolf.tk?
u/f8f82804

#d3 #perspective #model

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genuinebyte

function u(t) {

G = function G(x){return -127 * C(t*x*1.57)+128}
x.fillStyle=R(G(1), G(0.5), G(0.2), 1)
x.fillRect((G(0.15)-1)*7.55,0,5,1080)

Jan 25 2019 6:28 PM UTC

}// 125/140

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My first dweet is awfully colorful.

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8bit

function u(t) {

c.width^=0;for(i=0;i<8;i+=0.04){x.fillStyle=R(150,150,150,S(i*5+t-1.5)*.65+.7);x.fillRect(960+S(i*5+t)*300,540+C(i*3)*300,50*C(i*5+t),50)}

Jan 24 2019 11:59 PM UTC

}// 138/140

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pavel

function u(t) {

t?c.width|=0:(i=A=240,j=B=80,p=q=-9)
x[f='fillRect'](i+=p=i<7*A?p:-p,840,A,A)
x[f](j+=q=j>0?q:-q,1e3,B,B)
j>i-B&&(j=i-B,p+=s=(q-p)/5,q-=s*9)

Jan 24 2019 10:56 PM UTC

}// 140/140

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Perfect elastic collision #physics #simulation

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u/pavel

Big block is 9x the weight of the little block
u/katkip

This is impressive. Idea from 3blue1brown?
u/iverjo

Wow!
u/bekfast2390

This is like ping-pong!
u/joeytwiddle

Some context: https://www.youtube.com/watch?v=HEfHFsfGXjs 3Blue1Brown
u/katkip

hi, PI
u/Undefined

A fellow 3b1b fan, I see :D
u/joeytwiddle

#3b1b
u/ivylab

I always wait until the big one gets way up to the left side and it goes bam bam bam bam bam :)

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pavel

function u(t) {

with(x)for(c.width|=j=-8*t%1;j++<32;clip(fill(arc(960+40*j*S(j/9+t/5),700,5e3/j,9,13))))beginPath(fillStyle=R(a=9*j,a,a))

Jan 23 2019 11:54 PM UTC

}// 121/140

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#tunnel using clip()

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u/joeytwiddle

Sir. *applause*
u/jylikangas

Smooth!
u/katkip

:0
u/magna

#pavel
u/iverjo

Very nice!
u/bekfast2390

sick dude!!!
u/vain

Fucking cool!
u/visualDev

I am new here sorry how to run this locally?

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MingusDew

function u(t) {

c.width*=1;nn=27*S(t*2);for(i=960;i--;){p=0;for(n=1;n<nn;n+=2)p+=S(n*i*0.00657)/n;x.lineTo(10+2*i,540-480*p);}x.lineWidth=5;x.stroke();

Jan 21 2019 6:17 AM UTC

}// 135/140

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u/joeytwiddle

#math #fourier
u/katkip

Nice

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katkip

remix of d/11893 by u/katkip

function u(t) {

c.width*=1;for(i=144;i--;)for(j=50;j--;)
x.fillRect(600+i*9-j*12,600+j*C(t*5)*9-Math.abs(72-i)*S(-t*5)*2,6,+Math.abs(i-72)/5)

Jan 19 2019 8:14 PM UTC

}// 125/140

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#d3 moving roof

u/13thptr

weird flex but ok

dwitter.net | richev (19706)