gravity help

[bobstarlau]

hi, im new to director 3d.
can anyone tell me or show me how to create gravity for director 3d!
im basically creating a 3d world using maya. and inside the world it has a
airballon which i need to to some how fly. i managed to just control the
airballon forwards, backward, left and right. but i having difficulty of
learning how to give it gravity?? and i then need to be able to make it life
and desend. oh and do i just put a collision detection for the ground to stop
it from falling stright through?

or please just show me a link to some usefull tutorials

thanks

[extol]

Hi, bobsarlau. Have you used Havok? It's an xtra that comes with Director 8.5
and higher. It handles gravity, collision detection, as well as a lot of other
3d physics. You can find demos, tutorials, behaviors, and documentation here.

[url]http://director-online.com/havok/[/url]

Good luck!