public override void SetViewParams(XMVector vEyePt, XMVector vLookatPt)
{
base.SetViewParams(vEyePt, vLookatPt);
// Propogate changes to the member arcball
XMMatrix mRotation = XMMatrix.LookAtLH(vEyePt, vLookatPt, XMVector.FromFloat(0.0f, 1.0f, 0.0f, 0.0f));
XMVector quat = XMQuaternion.RotationMatrix(mRotation);
m_ViewArcBall.SetQuatNow(quat);
// Set the radius according to the distance
XMVector vEyeToPoint = XMVector.Subtract(vLookatPt, vEyePt);
float len = XMVector3.Length(vEyeToPoint).X;
SetRadius(len);
// View information changed. FrameMove should be called.
m_bDragSinceLastUpdate = true;
}
public void SetWorldQuat(XMVector q)
{
m_WorldArcBall.SetQuatNow(q);
m_bDragSinceLastUpdate = true;
}
