Separate HTML for LOCAL Foil 89 Double Buffering to Reduce Flicker

HELP! * GREY=local LOCAL HTML version of Foils prepared 29 January 1996

Foil 89 Double Buffering to Reduce Flicker - I

From CPS616 Lectures on Java CPS616 Basic Information Track for Computational Science -- Winter-Spring Semester 96. by Geoffrey C. Fox * See also color IMAGE

Here you have two "graphics contexts" (frame buffers of the size of the applet), and you construct the next image for an animation "off-line" in the second frame buffer.

This frame buffer is then directly copied to the main applet Graphics object without clearing image as in default update()

Image OffscreenImage; // Place to hold Image

Graphics offscreenGraphics; // The second graphics context which contains offscreenImage

offscreenImage = createImage(width,height);

offscreenGraphics = offscreenImage.getGraphics();

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