Re: [Geotools-devel] Replacing Vecmath

[Jim H. <jn...@cc...>]

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... 
> <mailto:and...@ge...>> wrote:
>
>     On Fri, Mar 13, 2015 at 7:57 PM, Jody Garnett
>     <jod...@gm... <mailto: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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