Re: [Geotools-devel] Replacing Vecmath

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

We do have an option of forking code into our codebase (especially if we
only use a couple classes). I am confused at how gwt-vecmath transitioned
to MIT license? Did they do a clear rewrite or get permission ... like they
keep the javax.vecmath package space and everything.

--
Jody Garnett

On 13 February 2015 at 11:59, Rich Fecher <rf...@gm...> wrote:

> For GeoWave we are interested in moving dependencies to maven central and
> I was trying to track down various dependencies that are not on maven
> central.  Vecmath 1.3.1 is available but not vecmath 1.3.2.  If we are
> talking about replacing vecmath it would be very nice to choose a library
> that is on maven central, I don't think gwt-vecmath is on maven central if
> that is the proposed replacement.
>
> On Sat, Feb 7, 2015 at 12:35 PM, Jody Garnett <jod...@gm...>
> wrote:
>
>> 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>
>>>>>
>>>>>
>>>>>
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>>>>
>>>>
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>>
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>> your
>> hub for all things parallel software development, from weekly thought
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