Hi Stu,
> Say I've got a 3D display and in it show a slice or cross-section
> (by making a new FlatField from 3D data by making a Gridded3Dset
> describing the plane of the slice in 3D space and resampling the full
> FlatField
> of 3D data to a new FlatField "sliceFF" using the Gridded3DSet).
>
> Now further the cross section data in "sliceFF" is also shown in a separate
> 2D display, a DisplayImplJ2D. This involves making a new FlatField
> say "slice2D" with a new Gridded2DSet, and some RealTypes
> and ScalarMaps based on that, and a new FunctionType, DataReference etc.
>
> Now by some user interface method the original slice in 3D is
> repositioned. sliceFF is recomputed
>
> How do I send word to the 2D display to go get the
> modified "sliceFF" when it is changed, make its display again? Or is there
> some
> even more subtle way to move the new data into the second display,
> such as sharing a data reference in either the Java or VisAD sense?
You should have a DataReference to sliceFF that's been
linked via an addReference() call to your DisplayImplJ2D.
When you update the FlatField in sliceFF via a setData()
call on the DataReference, that will trigger the
DisplayImplJ2D to re-display.
Cheers,
Bill
