Patent ID: 7409322
Filing Date: 2008-08-05
Classification: G06F,G06T

Abstract:
1. A method of modeling an object of nonuniform density to determine mass properties of the object, the object having a first portion with a first density, and a second portion with a second density embedded within the first portion, comprising the steps of: selecting a primary geometric shape corresponding to the first object portion, the primary geometric shape having dimensions representative of a continuous volume of the first object portion; selecting a secondary geometric shape corresponding to the second object portion embedded within the first object portion, the secondary geometric shape having dimensions representative of a continuous volume of the second object portion; assigning a first density to the continuous volume of the primary geometric shape and a second density to the continuous volume of the secondary geometric shape; and calculating the mass properties of the object from the continuous volume of the primary geometric shape assigned with the first density and the continuous volume of the secondary geometric shape assigned with the second density, wherein calculating the mass properties of the object comprising the step of: calculating an object mass by subtracting a third mass from a first mass and adding a second mass, the first mass derived from the first density and the volume of the first object portion, the second mass derived from the second density and the volume of the second object portion, and the third mass derived from the first density and the volume of the second object portion.