From:	T DOT Harte AT btinternet DOT com (Thomas Harte)
Newsgroups:	comp.os.msdos.djgpp
Subject:	ALLEGRO : check for Line intersecting a point . . . how?
Date:	Thu, 14 Aug 1997 17:35:14 GMT
Organization:	BT Internet
Lines:	13
Message-ID:	<33f340d2.7053399@news.btinternet.com>
NNTP-Posting-Host:	host5-99-62-144.btinternet.com
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi

	I want to know in Allegro if a line I draw intersects a point I know. Is
there a way to do this using Allegro, or should I just implement my own line
algorithm? The reason I ask is that I am doing the level editor for my next
project, and obviously when you try to click and drag a line it would be
necessary for me to know which line you are attempting to click and drag . . .

	Or, can you think of another way for me to do this? There is in theory
no maximum number of lines on screen, although maps above a certain complexity
probably won't be created for runtime speed reasons if nothing else.

		-Thomas

- Raw text -