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地形算法ROAM论文：ROAMing Terrain: Real-time Optimally Adapting Meshes
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上传时间: 2009-01-16
详细说明： 有关ROAMing地形算法的论文，强大 ROAMing Terrain: Real-time Optimally Adapting Meshes 摘要： Terrain visualization is a difficult problem for applications requiring accurate images of large datasets at high frame rates, such as flight simulation and ground-based aircraft testing using synthetic sensor stimulation. On current graphics hardware, the problem is to main- tain dynamic, view-dependent triangle meshes and texture maps that produce good images at the required frame rate. We present an algorithm for constructing triangle meshes that opt imizes flexible view-dependent error metrics, produces guaranteed error bounds, achieves specified triangle counts directly, and uses frame-to-frame coherence to operate at high frame rates for thousands of triangles per frame. Our method, dubbed Real-time Optimally Adapting Meshes (ROAM), uses two priority queues to drive split and merge op- erations that maintain continuous triangulations built from pre- processed bintree triangles. We introduce two additional perfor- mance optimizations: incremental triangle stripping and priority- computation deferral lists. ROAM execution time is proportionate to the number of triangle changes per frame, which is typically a few percent of the output mesh size, hence ROAM performance is insensitive to the resolution and extent of the input terrain. Dynamic terrain and simple vertex morphing are supported. ...展开收缩
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