| 摘要 |
Computer implemented methods and systems for CAD data exchange, and in particular for creating boundary representations ("breps") on a feature-by-feature basis are disclosed. According to an embodiment of the techniques described herein, a parameterized feature from a parametric based design system is exported from a source CAD system ( 404 ). Iterative steps and complimentary extraction techniques are employed by one or more processors ( 452, 456 ) to create an importable design model of the parameterized feature ( 433 ), which is imported into a target CAD system ( 408 ). While the techniques can include API ( 436 ), pattern matching ( 440 ), and user emulation ( 444 ) techniques, they include a brep per feature ( 450 ) technique. By exporting the brep on a per feature ( 453 ) basis from the source CAD system ( 404 ), the design intent of a CAD designer can be preserved on importation into the target CAD system ( 408 ). In particular, where a parametric representation ( 433 ) of the feature fails to import into the target system ( 408 ), an unparameterized representation ( 453 ) of the feature can be substituted. |
