Aha, thanks Jonathan - that clarifies it a bit. However, what I see in
UVProject is writing to the "uv" attribute. I need to modify the point
coordinates, and the "pw" attribute that is mentioned in the doco
is not there on my Card. How should I proceed? (since apparently the
GeoInfo is readonly).
When I iterate over each GeoInfo in the output GeometryList I am only
getting read-only Vector3s. writable_points() of course clears out the
whole output.
Would help tremendously if I could see how ModifyGeo does it's
geometry_engine :-(
On 24 mei 2012, at 21:35, Jonathan Egstad wrote:
The points are stored in the GeoInfo without the GeoInfo's matrix
applied to them.
DD::Image::GeoOp has the convenience function 'evaluate_transform()'
that will transform the point list and the ModifyGeo class uses this
automatically to make it easier to write simple point modifiers.
Point lists on input GeoInfo's should not automatically be
transformed unless you're subclassing off ModifyGeo, subclass off
GeoOp instead and the GeoInfo's should be 'raw'.
--
Julik Tarkhanov | HecticElectric | Keizersgracht 736 1017 EX
Amsterdam | The Netherlands | tel. +31 20 330 8250
cel. +31 61 145 06 36 | http://hecticelectric.nl
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