一种跨平台的框架建设虚拟相机。
不管怎么说，开发者应该计划一下如何处理通过几何裁剪的虚拟相机。
Regardless, developers should plan for how to handle the cameras clipping through geometry.
阐述通过自动寻找虚拟相机的有效位置以增强3d直接操作过程的技术。
This paper describes a technique for augmenting the process of 3d direct manipulation by automatically finding an effective placement for the virtual camera.
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