Patent Number: 7,822,798

Title: Dead reckoning for coordinate conversion

Abstract: Novel methods for converting coordinates for a position from a first coordinate system into coordinates in a second coordinate system are provided. Linear approximations of trigonometric functions are used to calculate values for the trigonometric functions when a position to be converted is within an acceptable bound of a previous position and more precise values of the trigonometric functions are used to perform the conversion when the position to be converted is not within an acceptable bound of a previous position. The present invention can be advantageously utilized to reduce the computation load in a distributed simulation environment, such as a federation of distributed interactive simulations.

Inventors: Toms; Ralph M. (Tracy, CA)

Assignee: SRI International

International Classification: G06F 7/38 (20060101)

Expiration Date: 2018-10-26 0:00:00