Re: How to speed up drawing simple objects on top of large objects

  • To: Jianting Zhang <jianting@xxxxxx>
  • Subject: Re: How to speed up drawing simple objects on top of large objects
  • From: Bill Hibbard <billh@xxxxxxxxxxxxx>
  • Date: Tue, 20 May 2003 16:08:53 -0500 (CDT)
Hi Jianting,

> I need to draw a rectangle (using DirectManipulationRendererJ2D)
> interactively on top of a big regular scalar map. It seems that all the
> maps will be redrawn for a single user click which is very time
> consuming. Is there any way to not draw the big scalar maps (while still
> keep them as background) to make the drawing faster?

First, the map won't be re-transformed but only re-rendered.
The transform is the slow part. But if the render time is a
problem, please consider using Java3D instead of Java2D.
Java3D is much faster.

Good luck,
Bill


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