Interactive Design of Parameterized 3D Models by Direct Manipulation

摘要

The subject of the thesis is the integration of a high-level parameterized modelrepresentation with direct manipulation interface techniques for the design of three-dimensional objects. A direct manipulation user interface enables the user to specify a model by interaction on a graphical representation, as an alternative for an abstract and error-prone alphanumerical dialogue style. A high-level model representation is obtained by using a procedural modeling language with general purpose control structures, including arithmetic and logical expressions, repetition, conditionals, functions and procedures, and dedicated data types such as coordinate systems, geometric primitives and geometric constraints. The developed techniques are implemented in a modeling system called GeoNode. The system incorporates paradigms of object-oriented design, with respect to both the user interface and to the system implementation. The applicability of the presented techniques is illustrated by examples in application domains such as solid modeling, kinematic analysis, feature modeling and top-down design. (Copyright (c) 1990 by M.J.G.M. van Emmerik.)