This is great. These are important modules and their operation has been somewhat murky. I'm really glad that you found out about the errors in r.drain AND found a way to fix them.
Michael
On Dec 11, 2008, at 10:00 AM, <grass-dev-request@lists.osgeo.org> <grass-dev-request@lists.osgeo.org > wrote:
Date: Thu, 11 Dec 2008 09:30:20 -0500
From: "Colin Nielsen" <colin.nielsen@gmail.com>
Subject: [GRASS-dev] r.walk/r.cost/r.drain updates
To: grass-dev <grass-dev@lists.osgeo.org>
Message-ID:
<d4e057e20812110630q15fc54f4x70878eb33eb4070f@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1Hi developers,
I have updated the r.walk, r.cost and r.drain modules to include
"back-link raster" functionality. Currently the path created by
r.drain does not necessarily take THE path through a cost surface,
that the cost accumulation algorithm took to generate that cost
surface. My updates add an "outdir" raster as an output from the
r.drain and r.cost modules which creates a backlink raster, or a
raster surface of the movements made to create the cost surface
(recorded in degrees). I then modified r.drain to read this surface
when it's given the "-d" flag.The changes I have made to these modules will be submitted as a patch
to the trac system relatively soon, but I have a few questions first.1) I started the changes to r.walk and r.drain on code downloaded last
June, labeled as "grass-6.3.0RC6." And added the functionality to
r.cost at the end of october to a version I checked out using "svn
checkout https://svn.osgeo.org/grass/grass/branches/develbranch_6"\. My
question is, how do I submit these patches in a way that doesn't
over-write subsequent changes (especially the earlier ones)? Should I
re-write the r.walk and r.drain updates into a more recent version?2) Do I simply attach the .patch files to a new ticket?
Thanks for your help,
-Colin
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