VIRTUAL OBJECT MANIPULATION

A method for moving a virtual object includes detecting a position of two input objects. A position of a centroid that is equidistant from the two input objects and located between the two input objects is dynamically calculated, such that a reference line running between the two input objects intersects the centroid. Upon detecting a movement of the two input objects, the movement is translated into a change in one or both of a position and an orientation of the virtual object. Movement of the centroid caused by movement of the two input objects causes movement of the virtual object in a direction corresponding to the movement of the centroid. Rotation of the reference line about the centroid caused by the movement of the two input objects causes rotation of the virtual object about its center in a direction corresponding to the rotation of the reference line.