paging ASDs and query geosets/triangles...

New Message Reply Date view Thread view Subject view Author view

Simon Pigot (simon++at++dpiwe.tas.gov.au)
Tue, 16 Nov 1999 22:48:39 +1100

I need some help with paging ASDs and query geosets/triangles. Just as a
refresher: I'm trying to move a textured tile over a paging ASD - the tile is
tethered to the projection of the eye point on to the ASD. (The texture on the
tile is being driven by a pfImageCache but this is irrelevant for the purposes
of this discussion because the same behaviour occurs with a simple static texture)

A week or so ago I asked whether query geosets/triangles actually work with
paging ASDs. I've since found that they do work (sort of) if you add the query
geosets/triangles to the ASD after the first evaluation cycle and frame sequence
- seems as though there isnt any ASD data to align/project and tesselate until
then. Can somebody tell me if this is the correct behaviour?

Anyway, after having overcome this hurdle I find that the tile moves nicely for
a short distance. Then triangle shaped holes start appearing in the tile, the
edges become ragged and the tile disappears. Why?

I wish there were some direct examples or experience that I could draw on here
but there is nothing (that I could find) in the performer release or the
developers toolbox on paging ASDs and query geosets/triangles (please tell me
I'm wrong :-))!

Thanks,
Simon

New Message Reply Date view Thread view Subject view Author view

This archive was generated by hypermail 2.0b2 on Tue Nov 16 1999 - 03:46:21 PST

This message has been cleansed for anti-spam protection. Replace '++at++' in any mail addresses with the '@' symbol.