necessary when modifying the mesh in some way. Previously, the only other option was to force creation of the collision data for every change but this is wasteful since the collision data does not need to be regenerated until collideWith() is called. git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10951 75d07b2b-3a1a-0410-a2c5-0572b91ccdca