Feature recognition algorithm for process selection

The function modeller presented in this paper was designed to extract product features for automatic process selection in an independent application. This modeller works on principles of Boundary Representation (B-Rep), specifically Euler formula and Attributed Adjacency Graphs and Constructive/De-Constructive Solid Geometry(CSG) modelling. These models are reviewed and presented as introductory material to this paper. The product CAD data that is used within these principles is obtained from a neutral STEP file format, ensuring its compatibility amongst existing CAD programs. A recursive checking method, utilising volume decomposition of a CSG model, is employed to ensure that a valid product model is developed.