[sldev] High-prim vehicles using phantom (Re: Havok4...)

[Argent Stonecutter]

On 03-Oct-2007, at 07:16, Corax wrote:
> Dale Mahalko wrote:
>> When such a linkset is set to be physical, we already know that
>> phantom objects can't be physical so those objects within the set can
>> simply be ignored for the mass / collision / center-of-gravity
>> calculations.

> Last time I checked phantom objects could also be physical.  Set an  
> object on the top floor of a multi-floor building, set it to  
> phantom and physical, and watch it fall through every floor to the  
> ground beneath the building!

The important thing about phantom prims is that they DO fall through  
the floor. In some cases it's even been possible to make them fall  
through the ground. They're not involved in collision-detection  
calculations with other prims... and that's the expensive bit.