1. A computer implemented method of defining interface modalities in a three dimensional (3D) sensor space, the method including: detecting a control gesture of a control object in a three dimensional (3D) sensor space, wherein the control gesture is a circular sweep that defines a collection of points within a radial distance to a fixed point; calculating gesture parameters of the control gesture that was detected; and defining spatial attributes for an interaction modality in the 3D sensor space responsive to the gesture parameters of the control gesture.