基于广义包围盒的交互操作在Vega环境中的应用

介绍了视景仿真软件Vega所具备的场景基本操作功能，针对Vega在交互操作功能方面的不足，提出了一种广义包围盒。介绍了广义包围盒的实现原理，定义了包围盒的数据结构，给出了获取方法，然后基于Vega API，通过两种不同方法建立了场景模型广义包围盒。基于广义包围盒，对场景模型直接进行操作，从而实现了Vega虚拟场景中的模型拾取、碰撞检测等仿真交互操作。给出了模型拾取、碰撞检测的具体实现算法，并成功应用在一个视景仿真程序中。

Application of inter-operation based on generalized bounding box in Vega

The common scene inter-operations provided by Vega were briefly introduced,with regard to its drawbacks,a generalized bounding box(GBB) was bring forward.The principle of GBB based on AABB and Sphere was given,its data structure was defined and the construct methods were presented.By using Vega API,GBB of the model was established.Based on GBB,several inter-operation methods in Vega virtual scene were put forward,such as model-picking and collision-detecting.The model-picking and collision-detecting algorithms were realized,and were successfully applied in a virtual scene simulation system.