LPD3DRMQUATERNION D3DRMQuaternionSlerp(LPD3DRMQUATERNION lpq,
LPD3DRMQUATERNION lpa, LPD3DRMQUATERNION lpb, D3DVALUE alpha);
Interpolates between two quaternion structures, using spherical linear interpolation.
·Returns the address of the quaternion that was passed as the first parameter if successful, or zero otherwise.
lpq
Address of the D3DRMQUATERNION structure that will contain the interpolation.
lpa and lpb
Addresses of the D3DRMQUATERNION structures that are used as the starting and ending points for the interpolation, respectively.
alpha
Value between 0 and 1 that specifies how far to interpolate between lpa and lpb.