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From: murthy@magnus.ircc.ohio-state.edu (Murthy S Gandikota)
Newsgroups: comp.graphics,comp.windows.misc
Subject: Help required with drawing arrows and trees in X/DecWindows
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Date: 21 Feb 91 18:16:30 GMT
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My project involves displaying some trees and drawings inside
DecWindows on VaxStation 3100 (VMS). I have two very specific
needs which are unrelated. I want to:

1. draw an arrow (or an arrowed line) between any two points
2. display a tree of parent-children-subchildren-.....
relationship

Are there ready made functions for these in X/DecWindows (I am
not sure)? Or alternately, can anyone provide the code (or a method)
for these? Specifically for drawing trees, I am looking for code which
does the following:

Given a tree specification in the form of parent-children-subchildren,
etc. the code should be able to compute the relative positions of
these in x-y co-ordinate system. Note that a tree may contain several
subtrees of any depth. 

I am sure these things are readily available in some commercial
packages. My needs are academic, so I would appreciate any help.

Thanks


Murthy Gandikota

Department of Chemical Engineering
Ohio State University
Columbus, OH-43210


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