Perforce JViews Framework Sample: Animation and Triple Buffering

Description

This sample displays a manager with a background map of the world. On top of the map, animated objects representing planes journeys are displayed. Above the plans, there are also semi-transparent clouds.
The background map is drawn using triple buffering. The cloud layer is cached in this demo. Using these techniques the complexity of the map and the clouds does not affect the redrawing time.

How to Use the Sample

Use the toolbar on the left of the window to control the view:
- Sets the view in Pan mode. Pan the view by dragging the image.
- Zoom on an area by selecting the area to be magnified.
- Zoom in.
- Zoom out.
- Make the entire image visible.
Change the way the planes are displayed by selecting or deselecting the Last Positions, Labels and Logos check boxes on the bottom bar.
Change the number of planes that are displayed using the tracks drop-down list on the bottom bar.
Toggle the Triple Buffer check box and the Layer Cache check box to understand the performance gain with these 2 techniques. You can see the number of FPS shown on the right.

How to Run the Sample as an Application

This sample can be run as an application. The installation directory contains an executable JAR file, triplebuffering.jar, that allows you to execute the sample with a double click from a file browser. Note that if you are using Internet Explorer, you can open the installation directory and execute the JAR file from the browser. This technique may not work in other Web browsers.

Alternatively, you can run the sample application from the command line. First check that the Ant utility is properly configured. If not, see the instructions on how to configure Ant for Perforce JViews.

Then, go to the installation directory of the sample and type:

ant run

Topics Covered

Triple-Buffering.
Animation using a Swing Timer.
Caching Layers.
Custom Graphics Objects.

Installation Directory

The Animation and Triple Buffering sample is installed here.