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

• References:
  • How to speed up drawing simple objects on top of large objects
    • From: Jianting Zhang