Re: [Geotools-devel] Replacing Vecmath

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

So Eric is the above breakdown useful? Our priorities are are accuracy and
speed :)

--
Jody Garnett

On 4 February 2015 at 19:55, Jody Garnett <jod...@gm...> wrote:

> Let me try:
>
> *gt-metadata: *looks to just be data structure (Point3d and
> MismatchedSizeException)
>
> org.geotools.math.Line
> org.geotools.math.Plane
>
> *gt-referencing: *uses assorted exceptions, extends GMatrix, and
> Matrix3d/Matrix4d multiply
>
> org.geotools.referencing.operation.DefaultCoordinateOperationFactory
>
> org.geotools.referencing.operation.builder.AdvancedAffineBuilder
> org.geotools.referencing.operation.builder.AffineTransformBuilder
> org.geotools.referencing.operation.builder.BursaWolfTransformBuilder
> - Imports GMatrix but does not use it
> org.geotools.referencing.operation.builder.MathTransformBuilder
> org.geotools.referencing.operation.builder.ProjectiveTransformBuilder
> org.geotools.referencing.operation.builder.RubberSheetBuilder
> org.geotools.referencing.operation.builder.SimilarTransformBuilder
>
> org.geotools.referencing.operation.matrix.GeneralMatrix
> - extends GMatrix (this is the key integration point with vecmath)
> org.geotools.referencing.operation.matrix.Matrix1.java
> org.geotools.referencing.operation.matrix.Matrix2.java
> org.geotools.referencing.operation.matrix.Matrix3.java
> - uses Matrix3d.multiply
> org.geotools.referencing.operation.matrix.Matrix4.java
> - uses Matrix4d.multiply
> org.geotools.referencing.operation.matrix.XMatrix.java
>
> org.geotools.referencing.operation.transform.AbstractMathTransform
> org.geotools.referencing.operation.transform.ProjectiveTransform
>
> So it comes down to:
>
> * Extending GMatrix
> * delegating to Matricx3d multiply and Matrix4d.muiltiply
>
> So we are stuck going through the GMatrix methods and seeing which ones
> are called. Going to ignore things like constructors/equals/set/get (so we
> can focus on where the math is used)
> - GMatrix.add(GMatrix,GMatrix) - used by cglib-nodep-2.1_3.jar (not sure
> what this is)
> - GMatrix.invert() - called by AdvancedAffineBuilder,
> BursaWolfTransformBuilderm ProjectiveTransformBuilder
> - GMatrix.mul(GMatrix) called by BursaWolfTransformBuilder, GeneralMatrix
> - GMatrix.mul(GMatrix,GMatrix) called by AdvancedAffineBuilder,
> BursaWolfTransformBuilder, ProjectiveTransformBuilder, ConcatenatedTransform
> - GMatrix.negate() called by AdvancedAffineBuilder,
> BursaWolfTransformBuilder
> - GMatrix.sub(GMatrix) called by MathTransformBuilderTest
> - GMatrix.sub(GMatrix,GMatrix) called by AdvancedAffineBuilder,
> BursaWolfTransformBuilder
> - GMatrix.transform() called by AdvancedAffineBuilder,
> BursaWolfTransformBuilder, ProjectiveTransformBuilder
>
>
> Not quite sure what to make of that .. looks like multiply, invert,
> negate, transform are our actual requirements.
>
>
> --
> Jody Garnett
>
> On 4 February 2015 at 18:58, Eric Engle <ee...@go...> wrote:
>
>> I've used almost all of those options at one time or another, but is
>> there a synopsis of the vecmath features that are actually used within
>> Geotools?
>>
>> On Wed, Feb 4, 2015 at 1:20 PM, Tyler Battle <tb...@bo...>
>> wrote:
>>
>>> Thanks to Jody, for pointing me at
>>> http://docs.codehaus.org/display/GEOTOOLS/Replace+Vecmath
>>>
>>> Has anyone worked with any of these (or similar) libraries?
>>>
>>> When I have some free time, I'm going to try some of the drop-in
>>> (fingers crossed) replacements. If there isn't a loss in performance, this
>>> would be an easy short/medium term solution. Does anyone have any
>>> suggestions for testing the performance of these libs?
>>>
>>> Switching to a more specialized library or rolling our own is also an
>>> option. My expertise is very limited in this respect, so I'd need a lot of
>>> help if we want to consider this option.
>>>
>>> --
>>>
>>> Tyler Battle
>>>
>>> Software Engineer| Boundless
>>>
>>> tb...@bo... <ca...@bo...>
>>>
>>> Victoria, BC, Canada
>>>
>>>
>>> <https://twitter.com/boundlessgeo>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------------
>>> Dive into the World of Parallel Programming. The Go Parallel Website,
>>> sponsored by Intel and developed in partnership with Slashdot Media, is
>>> your
>>> hub for all things parallel software development, from weekly thought
>>> leadership blogs to news, videos, case studies, tutorials and more. Take
>>> a
>>> look and join the conversation now. http://goparallel.sourceforge.net/
>>> _______________________________________________
>>> GeoTools-Devel mailing list
>>> Geo...@li...
>>> https://lists.sourceforge.net/lists/listinfo/geotools-devel
>>>
>>>
>>
>>
>> ------------------------------------------------------------------------------
>> Dive into the World of Parallel Programming. The Go Parallel Website,
>> sponsored by Intel and developed in partnership with Slashdot Media, is
>> your
>> hub for all things parallel software development, from weekly thought
>> leadership blogs to news, videos, case studies, tutorials and more. Take a
>> look and join the conversation now. http://goparallel.sourceforge.net/
>> _______________________________________________
>> GeoTools-Devel mailing list
>> Geo...@li...
>> https://lists.sourceforge.net/lists/listinfo/geotools-devel
>>
>>
>