How can i find out whether the distance between two Bounds objects has increased or decreased since the last time i check this out? That is i check the distance between 2 Bounds objects (which i actually don't know how to do) , then Bounds move a little bit and i got to figure out whether the distance between them increased or decreased. Note, that i mean _Bounds_ object in general, not BoundingSphere or BoundingBox. Thank u for your help! vladimir =========================================================================== 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".