并对相应的基于笔触语义分层的三维草图原型系统做了描述，对相关技术和算法的可行性进行了验证。
Based on the semantic characteristics, the prototype system supported 3D online sketch technique is built, and the related algorithms are verified.
将基于笔划的手势交互技术引入到三维草图设计中，由简单的笔划命令取代各种复杂的交互操作命令。
Specifically following contributions have been made:1. Through the application of the gesture-based interaction techniques, the complex interaction operations are replaced by simple strokes.
由于大部分公司使用计算机创建规格说明书、二维和三维草图以及财务管理等，所以需要具备相应的计算机能力。
Computer literacy is also required as most firms use computers for creating specifications, two - and three-dimensional drafting, and financial management.
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