Re: [Geotools-devel] Replacing Vecmath

[Jody G. <jod...@gm...>]

I think you are doing the coordination right now on this email thread ( the
tasks section of the proposal is also good).

I like your idea to make a general matrix testing master - add that to the
tasks section of the proposal and stick your initials next to it if you are
in position to volunteer.

I hope other PMC members can review the plan and vote.
On Sat, Mar 14, 2015 at 3:12 PM Jim Hughes <jn...@cc...> wrote:

>  Hi all,
>
> Jody, Tyler, and I hacked at this on Friday during a code sprint.  The
> partial results are here:
> https://github.com/geotools/geotools/commits/matrix
>
> There are a few remaining errors to track down, and the cautious part of
> me wants to go back and cook up a set of unit tests for GeneralMatrix.
>
> Anyhow, since we are all traveling for the next few days, I wanted to ask
> what the best way to coordinate future effort is?
>
> If anyone else is interested pitching in, let us know.
>
> Thanks,
>
> Jim
>
> p.s.  The commits from an 'Alex Tatusko' are from me.  I goofed up and
> didn't change the Git info on a loaner laptop.
>
>
> On 03/13/2015 03:55 PM, Jody Garnett wrote:
>
> A bit more research shows we should support the geotools Matrix and
> XMatrix methods (giving us a limited set of methods to implement). Proposal
> updated accordingly ...
>
>    --
> Jody Garnett
>
> On 13 March 2015 at 12:31, Andrea Aime <and...@ge...>
> wrote:
>
>>  On Fri, Mar 13, 2015 at 7:57 PM, Jody Garnett <jod...@gm...>
>> wrote:
>>
>>> At the foss4gna code sprint, here is a proposal to make this change:
>>> http://docs.codehaus.org/display/GEOTOOLS/Change+from+vecmath+to+EJML
>>>
>>>  Looking at this with Jim, the library has DenseMatrix64F (which does
>>> the work) and an example of wrapping this up for normal use called
>>> SimpleMatrix.
>>>
>>>  Each operation in SimpleMatrix makes a copy, an overhead we could
>>> avoid by using DenseMatrix64F ourself. So the proposal is to delegate to
>>> DenseMatrix64F, using SimpleMatrix (and its friend BaseMatrix) as a guide.
>>>
>>>  Alternatively we could kill our GeneralMatrix class and use
>>> SimpleMatrix directly in the rest of the GeoTools codebase, it would be
>>> more an an API change - which is okay if people only see this stuff inside
>>> MathTransforms. Anyone got an idea on how visible GeneralMatrix is?
>>>
>>>
>>  I don't... and guess we should try to keep it around. Anyways, the
>> direction appears to be sound, no objections.
>>
>>  Cheers
>> Andrea
>>
>>
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