DIMENSION DRIVING AND PARAMETRIC DESIGN IN SUPER-2D ENVIRONMENT

The merit of Super-2D is using 2D data to establish 3D model.Therefore parametric design can be realized without the3D model,and a complex multi-view engineering drawing can be generated and maintained with minimum efforts.In traditional 2D CAD systems,the data and geometric models are purely two dimensional,they have not enough information to understand the meaning of their3D-data model.If using multi-view,they can not support the dimension driven parametric design functionality because there are no necessary relations between views.So in the Super-2D environment,we use the engineering graphics standards and the projection rules of descriptive geometry to make 2D data having certain 3D information and to establish relations between different views.This paper presents a whole set of methods to support dimension driven parametric design based on the advanced descriptive geometry theory,and makes deep research on the mathematical thoery,geometrical modeling and constraint transformation.We try to provide a new thought in the CAD field.