Please help me with rotation of an object with mouse input :

I have a ‘Intermediate’ quaternion which goes from ‘Initial’ quat to ‘Final’ quat through SLERPing.

Intermediate = QuaternionSLERP(

InitialQuaternion ,

FinalQuaternion ,

ALPHA); // goes from 0.0 to 1.0

// ObjectAxis is a ‘Vector’,

// ObjectAngle is a ‘float’

QuaternionToAxisAngle(

Intermediate,

&ObjectAxis,

&ObjectAngle);

Then, somewhere in DrawGL() loop :

…

…

// RTOD = (180.0/PI)

glPushMatrix();

glRotatef(

ObjectAngle*RTOD,

ObjectAxis.x,

ObjectAxis.y,

ObjectAxis.z);

// draw a sphere

auxWireSphere(40.0f);

glPopMatrix();

…

…

ALPHA+=1.0f;

If(ALPHA>=1.0f)

ALPHA=0.0f;

…

Can someone please let me know as to how I could apply the same ‘SLERP’ technique for rotating the object via MOUSE input in Win32 ?

Thanks.