基于埃尔米特运动预测的地形实时绘制

发布时间：2018-05-11 07:32

本文选题：地形 + 埃尔米特算法　；参考：《计算机工程与设计》2017年02期

【摘要】：在大规模地形实时绘制时,地形规模越大,帧速率越小,渲染速度越慢,影响了漫游者在虚拟空间中的沉浸感。基于此,提出一种基于埃尔米特运动预测的地形实时绘制方法。采用埃尔米特插值算法进行视点运动预测,提前加载下一视点位置及视线方向的地形数据,减少实时绘制时的动态加载量,有效提高帧速率,避免漫游过程中画面停滞的现象;该算法计算量较小,稳定性相对其它算法较高,在取适当步长的情况下,能获得期望的精度,不会出现龙格现象。实验结果表明,在大规模地形的实时绘制时,该方法帧速率变化小,在保证渲染画面平滑和地形绘制实时性的同时,提高了地形渲染速度,避免了视觉上的跳跃感。
[Abstract]:When large-scale terrain rendering in real time, the larger the terrain scale, the smaller the frame rate and the slower the rendering speed, which affects the immersive feeling of the rover in the virtual space. Based on this, a real-time terrain rendering method based on Hermitian motion prediction is proposed. The Hermite interpolation algorithm is used to predict the view motion, and the terrain data of the next view position and line of sight are loaded in advance, which can reduce the dynamic load when rendering in real time, increase the frame rate effectively, and avoid the phenomenon of picture stagnation during roaming. The algorithm has less computation and higher stability than other algorithms. The desired precision can be obtained under the condition of appropriate step size, and there will be no Runge phenomenon. The experimental results show that the frame rate of this method is small when rendering large-scale terrain in real time. The method not only guarantees smooth rendering and real-time rendering, but also improves the speed of terrain rendering and avoids the sense of jumping in vision.
【作者单位】：太原理工大学计算机科学与技术学院;
【基金】：虚拟现实技术与系统国家重点实验室开放基金项目(BUAA-VR-15KF-17)
【分类号】：P217;TP391.9

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