Voxel Rendering by SockTaters

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 fullscreen

SockTaters

function u(t) {

for(c.width=i=-1;++i<256;x.fillRect(99+C(t+Math.atan(Y/X))*(X*X+Y*Y)**.5,Y/9,17,9))x.fillStyle=R(X=16*(S(t)>0?i:~i)&240,Y=15|i^(C(t)<0)*240)

Sep 18 2024 9:06 PM UTC

}// 140/140

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

Voxel Rendering

u/SockTaters

The math in R() ensures the farthest voxels from the viewer are drawn first regardless of rotation. If a 2**X by 2**X grid is labeled the obvious way (with the numbers 0 to 2**(2*X)-1 left-to-right, top-to-bottom) and n is the index of a given corner, then i^n maps i to an ordering that starts at n's corner and ends at the opposite corner. Rectangles of 2**X by 2**Y might also work. The math in R() is somewhat obfuscated for golfing purposes.
u/SockTaters

n=[0,3,12,15][0];for(i=0;i<16;)console.log(i++^n)// try these 4 corner indices


      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