I'm also eager for off-screen rendering feature.
I think I've read that future version of Java3D will support it,
but I cannot remember source of this information, so please don't
trust me too much.
I hope an announce from sun about this matter. I think this will
be one of the most important feature for new version of Java3D.
Tomo koike
At 11:46 99/05/20 +0100, chagenau wrote:
> Off-screen rendering: My vote for that idea!
> I'd prefer the direct-to-bufferedImage-rendering. In fact, I could need
> such a feature right now.
>
> Christian
>
> Eric Hawthorne wrote:
>
> > I have a feature request for the next Java3D version.
> >
> > Off-screen rendering.
> >
> > Right now, if you want to make an application where
> > Java3D runs on a server and captured frames are shown on a client,
> > the only way to do it seems to be to call
> > GraphicsContext3D.readRaster(..)
> > which can read the currently rendered frame into a Raster object from
> > which
> > you can extract an Image object. Unfortunately, what readRaster(..)
> > captures
> > is the pixels from the computer display screen in the rectangle of the
> > Canvas3D.
> > So if you have any windows popping up over the Java GUI, for any reason
> > at
> > all, you get pieces of those other window contents being served kindly
> > to your
> > graphics-viewing clients. For a whole host of reasons this is bad.
> >
> > Ideally, one wants a way to have Java3D be able to render directly into
> > some kind of Java
> > buffered image object, or at the very least to be able to image-capture
> > only the true contents of the Canvas3D, and not overlayed windows.
> >
> > The driving issue is that present-day web-based apps targeted at the
> > masses cannot
> > assume Java3D or even a VRML player on the client.
> > They can only assume at most a thin Java (1.1) applet, talking http to a
> > server.
> >
> > So we need a way of allowing Java3D to be used effectively as a
> > rendering server,
> > for semi-interactive 3D graphics on the client.
> >
> > I imagine the problem preventing this has something to do with the use
> > of
> > graphics cards and native methods. What are the technical prospects for
> > off-screen
> > rendering or frame-capturing in Java3D?
> >
> > Eric
> >
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