Method and apparatus for generating three-dimensional solid models

摘要

Method and apparatus for generating a three-dimensional solid model on the basis of three-dimensional wire-frame models, wherein projection boundaries of the fire-frame models are obtained by projection in two or three two-dimensional planes of a three-dimensional rectangular coordinate system (38, SA1, SC1), and maximum and minimum coordinate values of each projection boundary in two directions of the axes defining the plane of each projection boundary are determined (40, SA2, SC2), and wherein the projection boundaries which have the same maximum and minimum coordinate values in the direction of the common axis of each plane are determined as a set of sweep boundaries (42, SA3, SA4, SC6-SC12), so that the determined sweep boundaries are swept in respective directions perpendicular to the two-dimensional planes, to obtain an intersecting portion of geometries generated by the sweeping of the sweep boundaries, and to determine a three-dimensional solid model on the basis of the intersecting portion (44, SA6-SA8, SC14-SC16, SC18). <IMAGE>