[x3d-public] GeoPositionInterpolator revision for V4.0

[Mike McCann]

Andreas,

This seems like a good alternative. Let me propose a prose change for http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/geodata.html#GeoPositionInterpolator:

The GeoPositionInterpolator node provides an interpolator capability where key values are specified in geographic coordinates and the interpolation is performed within the specified spatial reference frame.

becomes:

The GeoPositionInterpolator node provides an interpolator capability where key values are specified in geographic coordinates and the interpolation is performed within the specified spatial reference frame. Great circle interpolation is recommended, future specifications will require great circle interpolation.


The new sentence for version 4 of the spec. could be:

Interpolated values are required to follow a great circle.

-Mike

On Apr 28, 2016, at 6:14 AM, doug sanden <highaspirations at hotmail.com> wrote:

> 
> Andreas,
> 
>> Alternatively, rather than introducing a new field it may suffice to
>> simply clarify in the appropriate spec. section that by default great
>> circle interpolation is recommended for consistency across geoSystems
>> and across browsers. This could be a recommendation  and not a
>> requirement but possibly with a qualifier that future spec. revisions
>> will actually require great circle interpolation.
> 
> Sounds good. 
> -Doug
> BSc Surveying Engineering
> 
> 
> 
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