Patent ID: 7983881
Filing Date: 2011-07-19
Classification: G06F

Abstract:
1. A method for making a line of sight determination, the method comprising: identifying, using a processor, a first location on a reference model of a spheroid, wherein the reference model of the spheroid comprises a plurality of cells, and wherein each cell of the plurality of cells is defined by a three-dimensional coordinate system comprising a first curvilinear axis that extends along a curved surface of the cell, a second curvilinear axis that extends along the curved surface of the cell and is orthogonal to the first curvilinear axis at an origin, and a third axis perpendicular to the curved surface of the cell and extending from the origin, wherein the third axis is orthogonal to the first curvilinear axis and the second curvilinear axis at the origin; wherein the first location is located within a first cell of the plurality of cells; identifying a target location on the reference model of the spheroid; and determining whether there is a line of sight between the first location and the target location using one or more of a first curvilinear axis of the first cell, a second curvilinear axis of the first cell, and a third axis of the first cell.