Path: utzoo!attcan!uunet!samsung!uakari.primate.wisc.edu!umriscc!mcs213f.cs.umr.edu!mcastle
From: mcastle@mcs213f.cs.umr.edu (Mike Castle (Nexus))
Newsgroups: comp.graphics
Subject: Re: Hexagonal bit maps
Message-ID: <1942@umriscc.isc.umr.edu>
Date: 14 Jan 91 03:51:41 GMT
References: <26275@uflorida.cis.ufl.EDU>
Sender: news@umriscc.isc.umr.edu
Organization: University of Missouri - Rolla
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In article <26275@uflorida.cis.ufl.EDU> jdb@reef.cis.ufl.edu (Brian K. W. Hook) writes:
>
>       0011111100
>       0111111110
>       1111111111
>       0111111110
>       0011111100

Clip you image to the hexagonal shape (such as by ANDing it with the above
sample image).

Using the same above sample image, do a PUTIMAGE with the NOTPut option.
    
Now do a PUTIMAGE with the clipped image with the ORPut option.

This may cause a slight flicker at the spot you are changing, but it should
work. 

The hardest part will probably be clipping the image.  If your pulling stuff
off the screen to be moved, you might be able to clip it on a separate
graphics page (not the current one).  I haven't done much graphics programming
yet, so I don't know how difficult that would be.

If your creating a bunch a images for later use, then it will probably be no
problem clipping it nicely.

Hope this helps.

BTW, anyone no how to access the 320x200x256 mode on a VGA?  or is that SVGA 
only?  I've seen lots of programs that use it, but can't seem to find any
mention of it in either TPascal or TC++ manuals.  I've picked up a couple of
.BGI drivers, but I haven't had a chance to look at them.  All my graphics
programming will probably have to wait until summer.  :-<

Tanx.
-- 
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