Sorry, that I post this letter again, but I didn't become any answer. Perhaps reads sombebody, who can help me. ( Sorry again ) 1. When I close my 'MainFrame' window, my application finishes its work. If there are more 'MainFrame's open, and I close one of them, my application closes, too. Why ? How can I rewrite the WindowClose event ? 2. I do not understand, how 'BoundingSphere' works. Or, I don't understand what bounds are. For ex. I want to rotate my object with the mouse and I define a BoundingShere object with a 1 m radius. ( BoundingSphere bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 1.0); ) And I add it to something... Ok, and now when I click outside of this area, my object rotates.How can this happen ? Or, I do not understand something ? What do bounds mean ? Thank you in advance! =========================================================================== To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff JAVA3D-INTEREST". For general help, send email to [EMAIL PROTECTED] and include in the body of the message "help".