Yup, that was it. Thank you. (I should've known
this.)
--- Mark Hood <[EMAIL PROTECTED]> wrote:
> > Date: Wed, 26 Feb 2003 18:02:07 -0800
> > From: Dola Woolfe <[EMAIL PROTECTED]>
> >
> > Basically, updating coordinates takes an
> unpredictable
> > (and usually very long) amount of time. The
> following
> > code takes anywhere from .03sec to 120sec.
> >
> > VDouble[] normals =
> gCalculateUnitNormals(surf);
> >
> > for (int node = 0; node <
> > surf.pGetNumberOfNodes(); node++) {
> > ta.setCoordinate(node, surf.pGetX(node));
> > ta.setNormal(node, new Vector3f(new
> > Vector3d(normals[node])));
> > }
> >
> > The surface has about 600 nodes.
>
> Not sure about the unpredicatable speed of the
> update, but you can surely speed
> this up by consolidating your coordinate updates.
> Individual calls to
> setCoordinate() and setNormal() are heavy-weight
> compared to updating a bunch
> of vertices at once with setCoordinates() and
> setNormals(). Each such
> individual call injects a geometry change
> notification into the system which
> has to processed one by one.
>
> Also note that you're in by-copy mode, so you're
> working on data that has to be
> copied into the Java 3D system. You can avoid
> copies by using GeometryArray
> by-reference semantics.
>
> -- Mark Hood
>
>
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