[JAVA3D] AW: [JAVA3D] Performance of rendering offscreen

[Bo, Jianquan, myview]

I have used offscreen rendering for printing of canvas3d. The reason
why I used it is that by printing I must get the current rendering
results of canvas3d. But the canvas3d is updated automatically and
I have get wrong rendering results for another delayed time. The canvas3d
can be overlapped by another frames which in the delayed time occured.
So that I have used offscreen rendering to get the correct image of
canvas3d. But it is very very slow.

I don't know if I have done it in a wrong way. The code I have used
is followed. I want to know also how the performance of offscreen rendering
should be actually or what I have done incorrectly.


class OffScreenCanvas3D extends Canvas3D {
    OffScreenCanvas3D(GraphicsConfiguration graphicsConfiguration,
                      boolean offScreen) {

        super(graphicsConfiguration, offScreen);
    }

    BufferedImage doRender(int width, int height) {

        BufferedImage bImage =
            new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

        ImageComponent2D buffer =
            new ImageComponent2D(ImageComponent.FORMAT_RGBA, bImage);

        setOffScreenBuffer(buffer);
        renderOffScreenBuffer();
        waitForOffScreenRendering();
        bImage = getOffScreenBuffer().getImage();

        return bImage;
    }

    public void postSwap() {
        // No-op since we always wait for off-screen rendering to complete
    }
}




Bo



-----Urspr�ngliche Nachricht-----
Von: Jeffery, Myles [mailto:[EMAIL PROTECTED]]
Gesendet: Freitag, 22. Dezember 2000 12:23
An: [EMAIL PROTECTED]
Betreff: [JAVA3D] Performance of rendering offscreen


Hi,

Has anyone used offscreen rendering?  If so, what is the performance like
compared to onscreen rendering?  The reason I ask is that I am concerned at
the limitations of Java3D onscreen rendering regarding problems with
combining lightweight and heavyweight components.

I am willing to sacrifice some speed in return for more control, but I don't
want to end up with an application that runs like a snail.

Any advice?

Thanks,

Myles

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