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针对传统的实物模型种类少、可视化和交互性差等缺点,为了建立具备可视化网络交互的制图CAD模型,首先使用三维设计软件对制图模型进行CAD建模和渲染,并将其数据转换成静态的VRML文件,再对这种静态VRML文件进行编程设计,获得具备拆装动画效果和网络学习功能的动态VRML模型;最后使用基于WebCAD信息可视化交互协同技术,开发了具有Web3D格式的制图模型,可以让使用者按照自己的主观意愿去完成浏览、缩放、旋转、测量、投影、剖切、装配和拆卸等操作。实验证明,使用动态VRML和Web3D的制图模型去替代传统的木头模型,有利于教师授课,有利于互动性网络学习和提高学习效率。
In order to establish the cartographic CAD model with visual network interaction, aiming at the shortcomings of the traditional physical model such as few types, poor visualization and poor interaction, the CAD model was first modeled and rendered using 3D design software, and its data was transformed into static VRML File, then the static VRML file is programmed and designed to obtain the dynamic VRML model with disassembly and animation effect and network learning function. Finally, using WebCAD interactive visualization technology, Web3D format drawing model is developed, which can be used According to their own subjective wishes to complete browsing, scaling, rotation, measurement, projection, cutting, assembly and disassembly operations. Experiments show that the use of dynamic VRML and Web3D cartographic model to replace the traditional wood model is conducive to teaching teachers is conducive to interactive learning and improve learning efficiency.