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Editing Vector Graphics in the Virtual Simulation Environment

ISSN号：1003-4951
期刊名称：计算机辅助绘图.设计与制造(英文版)
时间：2014
页码：32-32
分类：TP391.41[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术] TV222[水利工程—水工结构工程]
作者机构：[1]Shenzhen Graduate School, Beijing Engineering Technology Research Center of Virtual Simulation and Visualization, School of Electronics Engineering and Computer Science, Peking University, China
相关基金：Supported by National Basic Research Program of China （973 Program, No. 2010CB328002）, National Natural Science Foundation or China （Nos. 61232014, 61121002, 61173080） and National Key Technology Research and Development Program of China （No. 2013BAK03B07）.
相关项目：高逼真度视听系统的理论与方法

关键词：矢量图形, 虚拟仿真环境, 编辑, 虚拟环境, 显示模式, 多分辨率, 铁路网络, 矢量数据, vector graphics, virtual reality, virtual globe

中文摘要：

We present a method to represent multi-resolution vector graphics such as road networks or railway networks in virtual environment. These vector data can be interactively edited and the landscape and be explored in real time at any altitude from flight view to car view. We design a context-focused vector description of linear can areal features, with associated customized definition painter to specify their appearance(color and material) and their display mode(detailed mode or simplified mode). There are some special problems in drawing vector graphics in virtual environment. Floating-point round-off error appear when we use a low view point to observe the scene, and it leads to scene jittering. Drawing 3D wide lines turns into a problem on 3D terrain. We design a view-based self-adaptive interpolation algorithm and an offset line generating algorithm to solve it. Our results show high performance with good visual quality.

英文摘要：

We present a method to represent multi-resolution vector graphics such as road networks or railway networks in virtual environment. These vector data can be interactively edited and the landscape and be explored in real time at any altitude from flight view to car view. We design a context-focused vector description of linear can areal features, with associated customized definition painter to specify their appearance （color and material） and their display mode （detailed mode or simplified mode）. There are some special problems in drawing vector graphics in virtual environment. Floating-point round-off error appear when we use a low view point to observe the scene, and it leads to scene jittering. Drawing 3D wide lines turns into a problem on 3D terrain. We design a view-based self-adaptive interpolation algorithm and an offset line generating algorithm to solve it. Our results show high performance with good visual quality.

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