Isectors and dynamically modified GeoSets

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Dale Newcomb, Jr. (dnewcomb++at++d-a-s.com)
Fri, 3 Sep 1999 14:00:48 -0400

Hi all!

We are having a problem right now where our isectors seems to get
bad data back. We are using Vega's Z-type isectors on GeoSets that
we are dynamically modifying. Before any modifications, the isectors
work just fine, returning the Z value for the give X,Y position.
Once we have modified the GeoSet, the Z values returned are all wrong.
(Normally they are around 100 and they change to around 17,000.)

As far as the modifications go, we are basically adding and removing
triangles as well as moving vertices in the Z direction. We are also
modifying normals and texture coordinates. We are not using a pfFlux
as they do not support dynamic sizes for the vertex and polygon lists.

This issue is extremely time critical for our client, so any help
would be greatly appreciated.

Thanks,
Dale

----
Dale Newcomb, Jr.
Principal Engineer
Dynamic Animation Systems
http://www.d-a-s.com/~dnewcomb

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