Method and system for directly editing three-dimensional CAD (Computer Aided Design) model capable of keeping cylindrical body characteristics

• Main Authors: XU YANNING, HAO LIANGZHOU, WANG LU, WANG ZHENG, MENG XIANGXU
• Format: Patent
• Language: Chinese; English
• Published: 12.03.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention provides a three-dimensional CAD (computer-aided design) model direct editing method and system for keeping cylindrical body characteristics, and relates to the technical field of CAD direct editing, and the specific scheme comprises the following steps: obtaining a to-be-edited three-dimensional CAD model, and constructing a half-side structure based on the adjacency relation of three geometric elements of vertexes, sides and surfaces in the model; based on the half-edge structure, according to a target geometric element selected by a user and an expected editing operation, solving a new position of the geometric element of which the position is changed; verifying the solving result, and updating the three-dimensional CAD model after the verification is passed; according to the method, editing semantics of bottom-layer geometric elements such as vertexes, edges and surfaces of the CAD model are provided for a user, and efficient modification conforming to the editing semantics is realized by ad