This is a simple bouncing ball screensaver. I was surprised to discover that there weren't many of these around. So I thought I'd write one only to discover that the collision detection and response was more complicated that it looked. What sets this screensaver apart is that it has some interesting scenarios.

Special thanks go to Lucian Wischik for his original threaded timer, and to Dave Eberly for his explanation of collision detection.

Download: The Gravity Screen Saver is zipped up here: GravitySaver.zip (About 47 KB).

Requirements: Windows 95/98/NT/2000/Me/XP

Instructions: Extract the file "Install.exe" from the .zip archive. Run Install.exe, and it will install GravitySaver onto your computer. GravitySaver will then be your currently selected screensaver.

Features:

• Version 1.2: Outlined the special "good" and "evil" balls for easier identification.
• Version 1.1: Fixed a bug that occured when the user selected too many balls to fit on the screen.
• Version 1.0: First release.
• Features: Many customizable options, including some odd scenarios like "Good vs. Evil" and "Decay vs. Health."
• Technical Features: custom threaded timer, realistic collision detection and response.

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