## pXent_setmassoffset
(ENTITY* entity , VECTOR* vOffset, VECTOR* vInertia)

This
function sets the local position of the center of mass, and the relative inertia tensor.
###
Parameters:

**entity** |
Registered entity pointer (Actor) |

**vOffset** |
Position of the mass center point in entity coordinates, or **NULL** for letting PhysX calculate the mass center. |

**vInertia** |
Vector containing relative inertia factors - resistance against rotation - about the x, y, z axis. Use **NULL** for letting PhysX calculate the inertia tensor from the actor shape. |

###
Returns:

**1**
if successful, **0**
otherwise.
###
Remarks:

- An unrealistic center
of mass can lead to instability and jittering bodies.
- All components of the inertia tensor must be nonzero. Use
**(1,1,1)** for the rotation behavior of a symmetric object (such as a spere), or f.i. **(0.1,10,10)** for an object that is elongated along the x-axis (such as a rod).
- This call wakes the
Actor if it is sleeping.

###
Speed:

Fast

### Example:

pXent_setmassoffset(my,vector(0,0,-10),NULL);* //moves the center of mass 10 quants down.*

###
See also:

pXent_setmass