Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!emory!gatech!mcnc!uvaarpa!haven!decuac!news
From: baker@wbc.enet.dec.com
Newsgroups: comp.sys.amiga.programmer
Subject: Implementing moving crosshair...
Message-ID: <1991Mar22.151348.23800@decuac.dec.com>
Date: 22 Mar 91 15:00:39 GMT
Organization: Digital Equipment Corporation
Lines: 18

-Message-Text-Follows-

	Given an Intuition window, I want a pair of lines -- one running
	from the top to the bottom of the window, the other running from
	the left edge to the right edge.  The intersection point of the
	lines should track the mouse.

	I'm concerned about keeping up with all the MOUSEMOVE's, so I'm
	looking for the most efficient way to implement the cross-hair 
	lines themselves.  I can use either a Bob for each line, or I can
	Draw the lines in COMPLEMENT and move them myself.  Is the use of
	a Bob going to make any real difference ?

	Also, I'd be interested in any suggestions that would speed up
	tracking on rubber-band lines and stretchable bounding-boxes.

	Thanks much.
	 Art Baker