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Polygon Filling algorithm in Perl

by rbc (Curate)
on Sep 27, 2002 at 21:52 UTC ( #201359=perlcraft: print w/replies, xml ) Need Help??

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Re: Polygon Filling algorithm in Perl
by hossman (Prior) on Sep 28, 2002 at 08:55 UTC

    totally random thought...

    I notice you defined all of your y coords based on the height .. but you used subtraction, so you're still making an assumption about the minimum height. Any time you can define some constraint on a value given another value, you should consider doing so in your code. That way if someone says "Hey this is cool, but it's a little big so i'll change the size to 50x60" your code can deal with the change flawlessly...

    my $A = new Vector2D( int($width * 0.3125), int($height * 0.65) ); my $B = new Vector2D( int($width * 0.46875), int($height * 0.75) ); my $C = new Vector2D( int($width * 0.65625), int($height * 0.55) ); my $D = new Vector2D( int($width * 0.65625), int($height * 0.25) ); my $E = new Vector2D( int($width * 0.46875), int($height * 0.45) ); my $F = new Vector2D( int($width * 0.3125), int($height * 0.35) );

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Node Type: perlcraft [id://201359]
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[shmem]: hmm.. which makes emerge the question: is there a way to attach a subroutine to a variable, which is run as soon as that variable changes?
[moritz]: through a tie?
[shmem]: moritz: of course!
shmem slaps forehead m(
[shmem]: consider, then, @CBMonks as a tied variable which triggers withdrawing empty cups and serving new ones

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