Spierpinski debris around a pulsating c… by rodrigo.siqueira

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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rodrigo.siqueira

remix of d/23572 by u/rodrigo.siqueira

function u(t) {

for(Z=c.width=i=175;i--;)for(H=Z;H--;x.fillRect(i,H,1,1))Y=H/9-5,r=((X=i/10-9)*X+Y*Y+1-C(t*8))/Z,x.fillStyle=R(K=T(Y/r|X/r+t*Z)*Y+5/r,K/5)

Aug 17 2021 5:16 PM UTC

}// 138/140

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Spierpinski debris around a pulsating core #sierpinski

u/danny@hille.dk

Beautiful
u/danny@hille.dk

better resolution + performance for(I=new ImageData(c.width=w=175,w),i=w*w;i--;)Y=i/w/9-5,r=((X=(i%w)/10-9)*X+Y*Y+1-C(t*3))/w,I.data.set([K=T(Y/r|X/r+t*25)*Y+16/r,K/6,,255],i*4);x.putImageData(I,0,0)
u/jellyedwards

Wow!


      u(t) is called 60 times per second.
      t: elapsed time in seconds.
      c: A 1920x1080 canvas.
      x: A 2D context for that canvas.
      S: Math.sin
      C: Math.cos
      T: Math.tan
      R: Generates rgba-strings, ex.: R(255, 255, 255, 0.5)

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