That sounds a bit disappointing. The reference changes or updating of data associated
with the references is recommended via the UpdateGeometry interface so it should be
possible to use display lists in OpenGL. A user can call updateData() in the class
GeometryArray whenever they want to update the geometry/color/normals etc so can't the
display list be updated at that time. Am I missing something here?
Does sun have any plans to change this in the future?
thanks,
-vivek
-----Original Message-----
From: Kelvin Chung [mailto:[EMAIL PROTECTED]]
Sent: Monday, October 16, 2000 5:21 PM
To: [EMAIL PROTECTED]
Subject: Re: [JAVA3D] Geometry By-Ref vs. Copying question
>My question is this;
>Is there any performance cost with the by-ref vs. copying in general,
>meaning just regular rendering without GeometryUpdaters?
Yes, using geometry by reference will prevent
Display list (OpenGL) / VertexBuffer (D3D) being used
(since the reference may change frequently).
Under the new v1.2.1beta1 D3D, use of vertex buffer can
significantly improve performance.
Thanks.
- Kelvin
--------------
Java 3D Team
Sun Microsystems Inc.
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