Affine transforms - matrix algebra
pavel.safrata at oracle.com
Thu Jul 12 04:46:51 PDT 2012
On 12.7.2012 11:50, Martin Desruisseaux wrote:
> Le 12/07/12 11:28, Pavel Safrata a écrit :
>>>>> * Rename 'getConcatenation' as .. well .. 'getPrependage' :-)
>>>> I missed that method... What would its function? Or are we are
>>>> talking about something like a 'getTransformCoefficients()' method?
>>> This method is similar to concatenate (prepend) except that it is
>>> defined on parent Transform class and returns the result in a new
>>> Transform instance (allows for multiplicating arbitrary - possibly
>>> immutable - transfroms).
>> What about something like getCompound(Transform)? Probably switching
>> its meaning so that a.getCompound(b) returns equivalent transform to
> I'm not sure if this is relevant to JavaFX Affine, but in the
> vocabulary used by the ISO 19111 international standard (Geographic
> information — Spatial referencing by coordinates), "compound" and
> "concatenated" are slightly different concepts. We have "compound"
> coordinate systems, but "concatenated" transforms. If consistency with
> ISO 19111 was considered a worthy bonus, then "concatenate" or
> "getConcatenation" would be quite appropriate vocabulary.
> Not exactly ISO 19111 but closely related, the Open Geospatial
> Consortium defined this method:
Ok, thanks. We need to be consistent at least in scope our transforms,
so let's pick from
1) createConcatenatedTransform, createInvertedTransform
2) getConcatenatedTransform, getInvertedTransform
3) createConcatenatenation, createInverse
4) getConcatenation, getInverse
I'd probably vote for #3. Any other votes/suggestions?
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