Dragon curve animation

[Mr. Kibernetik]

Code: Select all

levels = 16
level = 0
step = 1
>
  draw(level)
  level += step
  ? level>levels
    step = -1
    level += step*2
  .
  ? level=0, step = 1
  #.delay(1)
<

draw(level)=
  mx,my = #.scrsize()
  fs = #.min(mx,my)/2
  r = fs/2^((level-1)/2)
  x = mx/2+fs*#.sqrt(2)/2
  y = my/2+fs/4
  a = #.pi/4*(level-2)
  #.scroff()
  #.scrclear()
  #.drawline(x,y,x,y)
  ss = 2^level-1
  > i, 0..ss
    ? #.and(#.and(i,-i)*2,i)
      a += #.pi/2
    !
      a -= #.pi/2
    .
    x += r*#.cos(a)
    y += r*#.sin(a)
    #.drawcolor(#.hsv2rgb(i/(ss+1)*360,1,1):3)
    #.drawline(x,y)
  <
  #.scr()
.

image1.PNG (7.94 KiB) Viewed 1544 times

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image3.PNG (189.63 KiB) Viewed 1544 times

[rbytes]

I selected and copied the code from the Forum using MS Edge and pasted it into the SPL editor. It pasted with no line feeds!

No line feeds

Capturenolf.PNG (68.82 KiB) Viewed 1519 times

I had to go to the Windows Store and try a couple of notepad apps until I found one that would restore the line feeds. It is called My Notes. But it may have inserted some other hidden character that is causing a syntax error. I can't see any error.

Syntax eror

Capturedragon.PNG (84.17 KiB) Viewed 1514 times

Definitely something to look into, as it is a nuisance to have to copy and paste the code twice to get line feeds, and it still won't work.

[Mr. Kibernetik]

Thank you for your information.
I will fix the error with absence of line feeds when pasting from the Forum.
I think that #.and function is newly added and it is absent in the published version. New functions are added practically every day, so the version in the Store is always a bit outdated.
I will publish current version ASAP, and dragon curve should run with it. Also new versions of SPL usually have more example programs, so you can restore example files in Options to get them.