/// <summary>
/// Modifies the orientation of the camera to get the camera to look in a particular direction.
/// </summary>
/// <param name="direction">The direction to have the camera look.</param>
public void SetDirection(Vector3 direction)
{
if (direction == Vector3.Zero)
{
return;
}
Vector3 zvec = -direction.NormalizeV();
Vector3 xvec = zvec.Up().CrossProduct(zvec).NormalizeV();
Vector3 yvec = zvec.CrossProduct(xvec).NormalizeV();
CenterOfInterest = QuaternionNew.FromAxis(xvec, yvec, zvec);
}
/// <summary>
/// Rotates the camera around a specific axis.
/// </summary>
/// <param name="angle">The amount to rotate the camera.</param>
/// <param name="axis">The axis about which the rotation occurs.</param>
public void Rotate(float angle, Vector3 axis)
{
Rotate(QuaternionNew.FromAngleAxis(angle, axis));
}
/// <summary>
/// Rotates the camera by a supplied rotation quaternion.
/// </summary>
/// <param name="rotation">The amount to rotate the camera by.</param>
public void Rotate(QuaternionNew rotation)
{
CenterOfInterest = rotation * centerOfInterest;
}