CAD systems and methods

摘要

The shape information control device (11) for processing the input/output and forming of shape data expressing a shape for each application of a product performs various procedures based on the input data from an input device (17) and outputs an obtained shape data to an output device (18). The device (11) refers to shape information files (12-16) for each shape expressing a product model as a product basic shape and other shape models, such as an analysis model derived from the product model. In these information files, a plurality of forming commands which express each shape are stored without redundancy. The device (11) further refers to a shape information file for expressing the product model as the basic shape in addition to the shape information file expressing the shape model. Thus by effectively controlling the shape of each desired model, a simple model forming can be made.