chambersdj@EA.USL.EDU (Darrin Chambers) (07/02/90)
I must have missed it somewhere, but how do I erase a line in graphics (I use << PICT NEG LINE PICT NEG >> ) There must be a better way! -Darrin
chambersdj@EA.USL.EDU (Darrin Chambers) (07/02/90)
(geez, that was fast!) Yes, I saw the TLINE function. But I need to erase *ALL* the pixels from (a,b) to (c,d) (the ones that were off should stay off too!) Darrin
edp@deland@enet.dec.com (Always mount a scratch monkey.) (07/02/90)
In article <00939102.8C5354E0@EA.USL.EDU>, chambersdj@EA.USL.EDU (Darrin Chambers) writes... > I must have missed it somewhere, but how do I erase a line in graphics > (I use << PICT NEG LINE PICT NEG >> ) TLINE performs an XOR along a given line segment, turning off pixels that are on and turning on pixels that are off. -- edp (Eric Postpischil) "Always mount a scratch monkey." edp@jareth.enet.dec.com
rayde@hpcvia.CV.HP.COM (ray_depew) (07/03/90)
How about << DUP2 LINE TLINE >> ? The DUP2 savevs a pair of endpoints for TLINE after LINE eats the first pair. Ray Depew HP - Inks and other gooey stuff -------------------------------------------------
chambersdj@EA.USL.EDU (Darrin Chambers) (07/04/90)
Thanks, someone suggested that by email. (I still think an ELINE function should have been included. I mean there are pixel on/off functions...) -Darrin