Re: Xor line drawing

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#53

From: Allan Schaffer
Date: Tue, 15 Dec 1992 21:08

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bobbyc@surya.UWaterloo.CA (Bobby Chawla) said..
>Could someone tell me how to draw a line on the SGI Indigos in 
>Exclusive-Or mode?  
>
>I would like to draw lines, and if the user does not require them,
>then be able to erase them efficiently.
>
>I was looking at the documentation and could not find it anywhere :-(.

check the manpage for "logicop(3G)"

Something like this should work:

	logicop (LO_XOR);
	bgnline();
		v3f(..);
		v3f(..);
	endline();
	logicop (LO_SRC)   /* back to default */

Allan
-- 
Allan Schaffer
aschaffe@sgi.com
aschaffe@netcom.com

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From: aschaffe@holodeck.csd.sgi.com (Allan Schaffer)
Newsgroups: comp.sys.sgi.graphics
Subject: Re: Xor line drawing
Date: 15 Dec 1992 21:08:46 GMT
Organization: Silicon Graphics, Inc., Mountain View, CA
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