Webpage end CAD drawing viewing system and method based on WebGL technology

Abstract

The invention provides a webpage end CAD drawing viewing system and method based on the WebGL technology, and relates to the technical field of building project modeling graph recognition and application. The method comprises acquiring a CAD file path; reading a CAD file into a system memory, and analyzing a data instance corresponding to a graph; mapping the data instance into a customized entity; mapping CAD coordinates and instance coordinates; compressing the data and the file by using a specific rule, and transmitting the data to a front end; reversely decompressing the data; displaying awebpage end graph; and saving user operation data records. The system comprises a graph reading system, a graph data conversion and compression system and a client data receiving and displaying and user operation data storage system. According to the invention, the CAD file can be displayed and operated on a browser based on WebGL, and can also be displayed and operated on a mobile equipment terminal developed based on H5. The CAD file can be quickly opened at a webpage end or a mobile end, simple operation of the CAD file is achieved, and corresponding modeling and drawing reading software does not need to be installed.

Description

technical field [0001] The invention relates to a webpage-side CAD drawing viewing system and method based on WebGL technology, and belongs to the technical field of architectural project modeling graphic recognition and application. Background technique [0002] WebGL (Web Graphics Library) is a 3D drawing protocol. This drawing technology standard allows the combination of JavaScript and OpenGL ES 2.0. By adding a JavaScript binding of OpenGL ES 2.0, WebGL can provide hardware 3D accelerated rendering for HTML5 Canvas , Web developers can smoothly browse 3D scenes and models in the browser with the help of the system graphics card, and realize data visualization. [0003] WebGL technology contains two advantages; first, the production of Web interactive 3D animation is realized through HTML script itself, without any browser plug-in support; Standard, cross-platform OpenGL interface implementation. Based on this technology, users can directly open webpages or H5-based AP...

AI Technical Summary

Problems solved by technology

[0009] First: Design drawings in DWG format need to be opened with specific software, which is not conducive to the sharing and circulation of design drawings and their application in subsequent links such as construction processing, quality inspection, and installation;

[0010] Second: Print design drawings in batches. Generally, there are many drawings and files in construction projects. The application personnel in each link print the drawings, resulting in a huge waste of paper and money; and the distance is not measured in real time on the drawings, and it must be returned to the DWG software for measurement. mark on the drawing

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