Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!mcsun!ukc!ox-prg!wen
From: wen@robots.ox.ac.uk (Wu Wen)
Newsgroups: comp.windows.x
Subject: manipulating regions in X
Message-ID: <1712@culhua.prg.ox.ac.uk>
Date: 13 May 91 09:29:59 GMT
Sender: news@prg.ox.ac.uk
Organization: Robotics Research Group, Engineering Science Dept, Oxford, UK.
Lines: 10
Originator: wen@duncan.robots

i am using regions to do simple 2-d geometric calculations and here is 
the problem:

i create an arry of regions world_region[i] use XPolygonRegion(),
XPointInRegion() works with world_region[i], but when i use
XIntersectRegion() it complains the type of world_region[i].

if i declare Region world_region instead of Region world_region[10],
it wont complain. can someone tell me why? and also how to make a copy
of a region? thanks.