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Curved body three-dimensional boundary representation model reconstruction method and device based on line boundary

A boundary representation and wireframe model technology, applied in the field of 3D boundary representation of curved surfaces, to achieve the effect of saving resources and simplifying design work

Active Publication Date: 2008-12-10
永凯软件技术(上海)有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for reconstructing a curved surface body B-rep model based on a wireframe, which mainly solves the wireframe model based on a curved surface body, how to generate a space surface, how to generate a space surface ring, how to generate a space patch and how to Generate the final B-rep model and other issues, and realize the high-precision conversion of the wireframe model to the B-rep model

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  • Curved body three-dimensional boundary representation model reconstruction method and device based on line boundary
  • Curved body three-dimensional boundary representation model reconstruction method and device based on line boundary
  • Curved body three-dimensional boundary representation model reconstruction method and device based on line boundary

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[0050] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0051] In the embodiment of the present invention, adopt client / server hardware topology such as figure 1 shown. The client inputs the wireframe model data of the surface body. The wireframe model data in this embodiment is obtained by the three-dimensional reconstruction system based on three views, and then the model data is transmitted to the server through the wide area network, and the spatial surface is generated on the server, and Operation processing of removing redundant elements to generate B-rep model. The client can be composed of a general-purpose PC or an independent server. Its basic requirements are to have certain computing power, input and output functions, and the function of transmitting computing results through the network, and to be able to accept remote server computing. the result of.

[0052] The p...

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Abstract

The present invention relates to a wire-frame-based curved surface body three-dimensional boundary representation (hereinafter referred to as B-rep) model reconstructing method and a device thereof. A wire frame model of a project mechanical part in a three-dimension modeling system can be transferred into a three-dimensional boundary representation (B-rep) model. The wire frame model which is obtained by reconstructing various kinds of views or CAD software drawings and the wire frame model which is reconstructed by a sketch-based intelligent CAD system can also be transferred into the B-rep model by the method. The method is particularly effective for the wire frame model with high precision and complete geometrical and topological information. The method can be widely applied to the three-dimension reconstructing in a project drawing and the CAD software drawing and can also be applied to the fields of industrial automatic production planning and decision, three-dimensional identification and detection, product data management and data base searches,computer auxiliary design and manufacture, etc.

Description

Technical field: [0001] The invention relates to a wireframe-based three-dimensional boundary representation (Boudary Representation, hereinafter referred to as B-rep) model reconstruction method and device thereof. technical background: [0002] In the field of computer-aided design and manufacturing (CAD / CAM), there have been CAD drawing or modeling systems based on two-dimensional planes and three-dimensional shapes, such as CADAM, AutoCAD, CATIA, Pro / E, UG, etc. The earliest three-dimensional modeling system is the wireframe model system in the 1960s and 1970s. As a simple three-dimensional modeling, wireframe can express basic geometric information and certain geometric data topology. In the 1970s and 1980s, with the great strides forward of computer technology, CAD / CAM technology has also made great progress, and modeling technologies such as B-rep model and solid model have appeared successively, expressing more parts. Other features also bring amazing convenience to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06T17/40G06T19/00
Inventor 顾永明宦红伦
Owner 永凯软件技术(上海)有限公司
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