METHOD AND SYSTEM FOR MULTIPLE VIEWS COMPUTER-AIDED-DESIGN INCLUDING PROPAGATION OF EDIT OPERATIONS ACROSS VIEWS WHILE ENSURING CONSTRAINTS CONSISTENCY

摘要

A method of modifying a CAD system model performed on a data processing system includes receiving a dataset of co-ordinates representing an article in 2d, or in 3d and receiving 2d or 3d constraints respectively, to be applied to any changes to the dataset of co-ordinates for the article. A modification to be applied to the dataset is received and combined with the relevant 2d and 3d constraints to produce a constrained modification for each of the article and associated article. The constrained modification is solved in 2d and in 3d to determine whether a solution exists in which all constraints are met. If the solve is successful, the constrained modification is applied to each dataset simultaneously and, updated datasets are stored. If the solve fails, the constraints may be reduced and the solve step repeated, or the process is terminated.