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From: niko@du248-16.cc.iastate.edu (Schuessler Nikolaus E)
Newsgroups: comp.sys.mac.programmer
Subject: Re: MPW MacApp view question
Message-ID: <1990Sep23.202913.4096@news.iastate.edu>
Date: 23 Sep 90 20:29:13 GMT
References: <90266.145525TAB113@psuvm.psu.edu>
Sender: usenet@news.iastate.edu (USENET News Poster)
Reply-To: niko@iastate.edu (Schuessler Nikolaus E)
Organization: Iowa State University
Lines: 26

In article <90266.145525TAB113@psuvm.psu.edu> TAB113@psuvm.psu.edu writes:
>
>  I'm writing a game in which the game board is comprised to hexogonal tiles.
>Each tile will be an object, TTIle, which is a subclass of TPicture.  My
>problem is in putting these tiles together.  Because the tiles are 6 sided,
>flat sides on bottom and top, there are 4 triangles of white "dead space".
>Thus, when one tile is layed down and to the right of the first tile, the
>second tile's "dead space" covers the first tile!
>
>  Does anyone have any ideas on how to place these irregular shaped PICT's
>down without them interfering with each other.  Thanks.
>
>Michael Bitonti
>Penn State University

I haven't figured out the TCL stuff yet, but I think I can partly answer
your question.  You want to change the drawing mode to something like
XOR (exclusive or) or just plain OR. I think the quickdraw default is
COPY or something that clobbers whatever's underneath.  With XOR, you just
need to draw it again (either piece) and it will 'erase' itsself leaving the
other intact.
--
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Niko Schuessler               "On a two semester mission to engineer where
niko@iastate.edu               no-one has engineered before.... :-) "
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