This article established the mechanism of scene chart management and Viewing Volume cut and designed the LOD model, then realized real-time display and alternating operation of the 3-d scene.
建立了场景图管理机制和视景体裁剪机制，设计了LOD模型，实现了三维场景的实时显示和交互操作。
Look at the nearby chart. It is like a photo of a mountain scene reflected in a tranquil lake. The rises and falls and horizontal meanderings of gold are nearly the negative of the dollar's.
将两者的走势图两相比较，效果很像是一幅平静湖面倒映着山景的照片，金价的起落以及平缓的走势在美元走势图上都有近乎于镜像的反应。
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