Path: news.mathworks.com!not-for-mail
From: Mike Karr <mkarr@mathworks.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: find distance along complicated geometric surface
Date: Mon, 21 Jun 2010 10:26:51 -0400
Organization: The MathWorks, Inc.
Lines: 22
Message-ID: <hvnsrb$a1c$1@fred.mathworks.com>
References: <hss9t2$8ue$1@fred.mathworks.com>
NNTP-Posting-Host: mkarr-deb5-64.dhcp.mathworks.com
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
X-Trace: fred.mathworks.com 1277130411 10284 172.31.45.190 (21 Jun 2010 14:26:51 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Mon, 21 Jun 2010 14:26:51 +0000 (UTC)
User-Agent: Mozilla-Thunderbird 2.0.0.22 (X11/20090707)
In-Reply-To: <hss9t2$8ue$1@fred.mathworks.com>
Xref: news.mathworks.com comp.soft-sys.matlab:646709

Meagan wrote:
> hi all,
> 
> I am working on a project and I have hit a wall and could really use 
> some help.
> I am trying to find the distance between two points on a shape that is 
> defined by vertices and faces. I can't just use the distance formula 
> because I need to make sure that the entire distance between the two 
> points is in contact with the shape surface. I have no idea how to start 
> doing this or if this task is even possible so any input would be 
> greatly appreciated.
> Thanks,
> Meagan

Google "geodesic triangulated surface" and you will find a body of 
research done on your problem.  Add "MATLAB" to the search and it will 
take you implementations in the file exchange of MATLAB central.

I have not investigated either the research or the MATLAB code.

hth,
mike