http://qs321.pair.com?node_id=1231464


in reply to Re: circular area in a coordinates grid (AoA)
in thread circular area in a coordinates grid (AoA)

Cool! But that eval poked my eye.

The following can potentially save on some sqrt's too:

my $delta_x = $radius ** 2 - ($center_r - $row) ** 2; if( $delta_x >= 0 ){ $delta_x = int sqrt $delta_x; ...

bw, bliako

Replies are listed 'Best First'.
Re^3: circular area in a coordinates grid (AoA)
by LanX (Cardinal) on Mar 20, 2019 at 00:20 UTC
    you can also get rid of both squares

    x = r-y

    now increment y2=y+1

    x2 = r-(y+1)

    x2 = r-y - 2y - 1

    x2 = x - 2y -1

    I'm too tired to get rid of the sqrt too now :)

    Cheers Rolf
    (addicted to the Perl Programming Language :)
    Wikisyntax for the Monastery FootballPerl is like chess, only without the dice

Re^3: circular area in a coordinates grid (AoA)
by tybalt89 (Prior) on Mar 19, 2019 at 23:53 UTC

    Just having some fun :)

    Nothing wrong with having a little fun in a "proof-of-concept" example, is there?
    It's not like it's production code :)

      sorry maybe my comment sounded a bit aggresive (but it wasn't meant to be).