Dweets awesomed by u/mxfh

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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pavel

remix of d/9294 by u/cantelope

function u(t) {

for(i=w=c.width|=q=6.2832;i--;x.arc(960+S(p=(i>>1)*q/9-t)/Z*w,540+C(p)/Z*w,Z*Z,a=-t%q,a))Z=2+(i-1&-2)%98-8*t%2,i%98||x.beginPath(x.stroke())

Feb 6 2019 2:02 AM UTC

}// 140/140

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#uncompressed

u/cantelope

gotta hand it to you 👏
u/pavel

Playing it safe on the arc angle, modding it by 2pi just to avoid the bug on Safari.

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rodrigo.siqueira

remix of d/12129 by u/rodrigo.siqueira

function u(t) {

c.width^=Y=0
for(X=2e3;X--;)
 Y=C(Y+t)*X/450,
 x.fillRect(X,540+Y*120,5,5)

Feb 4 2019 2:12 PM UTC

}// 74/140

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A very small bifurcation equation. #attractor

u/rodrigo.siqueira

Animated #bifurcation

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SMON

remix of d/12066 by u/thorbear

function u(t) {

t?0:z=y=c=a=1.4,b=1.56,d=-6.56,x.globalAlpha=.01;
for(i=2e4;--i;)n=d*S(a*z)-S(b*y),y=c*C(a*z)+C(b*y),z=n,x.fillRect(z*125+950,y*200+500,4,4)

Feb 1 2019 1:48 PM UTC

}// 140/140

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Okay, now with the original parameters!

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elaborate

function u(t) {

c.width=1920;for(i=0;i<1111;i++){t-=T(t*1/222);x.fillRect(T(t)*333,1.5*i+T(t),22,999)};

Feb 1 2019 5:52 AM UTC

}// 87/140

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23_Skidoo

remix of d/12044 by u/23_Skidoo

function u(t) {

c.width|=c.style.background='linear-gradient(#e32,#318'
x.globalAlpha=.3
x.rotate(5.5)
for(i=-(z=40);i<z;)x.fillRect(i++*(z+C(t*i)),0,z,2e4)

Feb 1 2019 1:52 AM UTC

}// 140/140

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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

Show more comments…
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

function u(t) {

x.beginPath()
for(c.width^=i=0;i<3e3;i++)x.lineTo(X=540,X),x.lineTo(960+X*C(i/2),X+C(t+i+S(i/4+t))*360)
x.strokeStyle=`#0452`
x.stroke()

Jan 30 2019 9:35 PM UTC

}// 136/140

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Rotating curved surface

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mxfh

function u(t) {

for(i=h=700;i-->-h;x.fillStyle=R(u=i>0?(h+i*t)%i*5:h))x.fillRect(u?960-i:0,i+h,u?i*2:2e3,1)

Jan 30 2019 5:15 AM UTC

}// 91/140

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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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