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 
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To: djgpp AT delorie DOT com
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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