Playing with code: a circle function using triangle math

[CharlieJV]

this might be interesting:

Code: (Select All)

Screen _NewImage(400, 400, 32)
r = 100
cx = _Width / 2: cy = _Height / 2
For x = 0 To r
    y = Sqr(r * r - x * x)
    PSet (cx - x, cy - y)
    PSet (cx + x, cy - y)
    PSet (cx - x, cy + y)
    PSet (cx + x, cy + y)


    ' remove comments for no holes
    PSet (cx - y, cy - x)
    PSet (cx + y, cy - x)
    PSet (cx - y, cy + x)
    PSet (cx + y, cy + x)
Next

That's awesome, and kind of funny.

I've been mulling this in the back of my sponge all day, and I was just about to sit down and code something similar when I saw your reply.

I'm going to write up a blog entry about my own code and a testing app for it to compare performance of the alternative CIRCLE approach compared to the implementation of CIRCLE in wwwBASIC as it was when I nabbed it and how it still is today.