Patent ID: 7197441

Claim:
A method for generating progressive solid models based on a cellular topology, the method comprising the following steps: a cellular model generating section, if a specific feature-based model is inputted, for performing a mapping operation on the input feature-based model with reference to an internal feature library, thereby generating cellular topology models based on feature models; a progressive model initializing section for composing cells by use of volume attributes of the cells according to a relationship between the input feature-based model and the cells obtained from the cellular topology model to generate an initial cellular model which is simplified to generate the progressive solid model, and searching n delta volumes transiting the initial cellular topology model by composing and decomposing the cells so as to progressively complement a difference between the initial cellular topology model and the input feature-based model; and a progressive model generating section for generating n progressive features defined as a face subset of the n delta volumes and corresponding attributes, and outputting n progressive features PF 1 , and the initial cellular model SM 0 as a completed progressive solid model representation PSM={SM 0 , {PF 0 , PF 1 , . . . , PF n }}.