I think this is just like an error I was having while trying to use picking
with indexed geometry a while back. Kelvin Chung from Sun said they found a
bug in the 3-D core, and would be fixed with the next release. Search the
archives. Couldn't have been more than a few months back.
Daniel
-----Original Message-----
From: Guillaume ALLEON [mailto:[EMAIL PROTECTED]]
Sent: Thursday, September 07, 2000 12:38 PM
To: [EMAIL PROTECTED]
Subject: [JAVA3D] Picking and other stuff for scientific viz
Hi,
In order to have things more practical I join some source code (It is
derived
from one Java3D demo and is quite bad at that time).
The application I want to design is a scientific visualisation application.
Roughly
we want to visualize a large number of triangles (millions) and put colors
on
triangles and/or vertices. Up to now, all my triangles are part one a single
Shape3D.
Having one shape by triangle is an overkill !
My question are the following:
- Is there a way to have the Menu coming on top of the canvas3D (there is
a discussion on that topic on j3d.org but only for Popup menu.
- Is there a way to assign colors onto triangles rather than on their
vertices
without duplicating nodes
- At the moment we have a Color bar making the correspondance between
the real physical value and the color. We have put it in a AWT Pane. I have
the feeling that it would be better to have it in the scene. How to do it
without
having tons of shapes that speed down rendering ?
- The more interesting question is dealing with Picking there are a lot of
Picking functions but these are all oriented for mouvement (translation,
rotation, zoom).
I would like to Pick (single click) my scene and get back the indice of my
triangle
in my triangle array so that I can modify locally my triangle or I can
display the local
physical value on that picked point.
Thanks for your help and time
Regards
Guillaume
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