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首页> 外文期刊>IEEE transactions on visualization and computer graphics >vLOD: high-fidelity walkthrough of large virtual environments
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vLOD: high-fidelity walkthrough of large virtual environments

机译:vLOD:大型虚拟环境的高保真演练

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摘要

We present visibility computation and data organization algorithms that enable high-fidelity walkthroughs of large 3D geometric data sets. A novel feature of our walkthrough system is that it performs work proportional only to the required detail in visible geometry at the rendering time. To accomplish this, we use a precomputation phase that efficiently generates per cell vLOD: the geometry visible from a view-region at the right level of detail. We encode changes between neighboring cells' vLODs, which are not required to be memory resident. At the rendering time, we incrementally construct the vLOD for the current view-cell and render it. We have a small CPU and memory requirement for rendering and are able to display models with tens of millions of polygons at interactive frame rates with less than one pixel screen-space deviation and accurate visibility.
机译:我们介绍了能见度计算和数据组织算法,可对大型3D几何数据集进行高保真演练。我们的演练系统的一个新颖功能是,它仅在渲染时执行与可见几何图形中所需细节成比例的工作。为了实现这一点,我们使用了预计算阶段,该阶段可以有效地生成每个单元格的vLOD:在正确的细节级别从视图区域可见的几何。我们对相邻单元的vLOD之间的变化进行编码,而这些变化不需要驻留在内存中。在渲染时,我们为当前视单元增量构建vLOD并进行渲染。我们对渲染的CPU和内存要求很小,并且能够以交互帧速率显示具有数千万个多边形的模型,并且屏幕空间偏差小于1像素,并且可见性准确。

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