Hi folks.
I am building geometry using GeometryArray.setCoordRefDouble() and, by
and large it all seems to work fine, as far as displaying the 3d data is
concerned anyway.
But I'm running into a problem, once the data goes live, and I want to
calculate something based upon the coordinates.
The problem occurs if I try to use the getCoordRefDouble() method. It
throws the following exception:
javax.media.j3d.CapabilityNotSetException: GeometryArray: no
capability to read data reference
at
javax.media.j3d.GeometryArray.getCoordRefDouble(GeometryArray.java:4311)
My code actually calls the exact same method *before* it all goes live
without any problem, so it is kind of frustrating.
Anyway, here are the flags that I have setup for each GeometryArray:
int flags =
GeometryArray.BY_REFERENCE |
GeometryArray.ALLOW_COORDINATE_READ |
TriangleFanArray.COORDINATES |
TriangleFanArray.NORMALS |
TriangleFanArray.TEXTURE_COORDINATE_2;
From this, and the exception message, it seems that I should also include
GeometryArray.ALLOW_REF_DATA_READ |
But, when I include this flag, the GeometryArray no longer renders - I
get a blank Canvas3D, where once I was getting the data to display no
problems.
Is there something I missed here, or is using CoordRef data
problematic? If anyone has a clue about this I'd appreciate it.
I can possibly live without the CoordRef, though it looks like a useful
facility, to be able to modify the coords on the fly (though I have yet
to do this btw).
-- Russell
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