zensaiyuki: I found this trick for gene… by BriSeven

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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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.

show FPS hide FPS share 2 remixes fullscreen

BriSeven

function u(t) {

c.width=1920;for(i=0;i<16;i++){x.fillStyle=(i*0x775511).toString(16).slice(-6);x.fillRect(i*160+S(t)*300-300,0,160,12000)}

Dec 20 2016 2:28 AM UTC

}// 123/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

zensaiyuki: I found this trick for generating a 16 color palette: i*0x775511. i wonder if it can be made smaller in javascript.

u/iverjo

Neat. To begin with, you can replace 0x775511 with 7820561. Further, you can look into bit operations or modulo to truncate/slice the string


      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)

dwitter.net