Patent ID: 6900806

Claim:
A method of perspective transforming a plurality of objects in a three-dimensional space into a two-dimensional space, each object having a plurality of vertexes, the method comprising: determining, from the plurality of vertexes for each of the objects, a first respective plurality of vertexes of the objects which are not localized within the three-dimensional space, and a second respective plurality of vertexes of the objects which are localized within the three-dimensional space; performing a first perspective transformation process on the first respective plurality of vertexes of the objects; and performing a second perspective transformation process on the second respective plurality of vertexes of the objects, wherein the first perspective transformation process uses respective scale factors that are inversely proportional to Z(j,i) to perspective transform the respective vertexes of the plurality of objects, where Z(j,i) is a distance from a point of view to a particular vertex, j, of a given object, i, the first perspective transformation process is a normal process and the second perspective transformation process is an approximation process requiring less calculating power than the first perspective transformation process.