王晨明,苏天赟,王国宇,宋庆磊

• 1:青岛朗讯科技通讯设备有限公司
• 2:国家海洋局第一海洋研究所
• 3:中国海洋大学信息科学与工程学院

摘要(Abstract)：

为了提高大规模海底地形的绘制效率,LOD(细节层次,Levels of Details)技术必不可少。在ROAM(Real-time Optimally Adapting Meshes,实时优化自适应网格)算法的基础上,通过数据加载、视域剪裁、建立评价方法等技术手段,根据视点位置实时更新可视区域,避免了多余三角面片的生成和绘制。同时,采用对不共斜边节点强制分割的方法处理裂缝问题,通过索引坐标与实际坐标转换以及无效值处理实现任意范围海底地形对ROAM算法的应用,消除了传统ROAM算法对数据网格大小的限制,保证了绘制的效果和正确性。最后,通过GPU实时计算和绘制各顶点的法线和颜色,实现了大规模海底地形的实时建模和高效绘制,满足了高精度、海量海底地形漫游浏览的需求,特别是针对起伏比较大的地形漫游浏览。

关键词(KeyWords)： 细节层次(LOD);二叉树;实时优化自适应网格(ROAM);海底地形;评价因子

Abstract:

Keywords:

基金项目(Foundation): 海洋公益性行业科研专项(201205001);; 国家科技重大专项“大型油气田及煤层气开发”子任务(2011ZX05056-001-01)资助~~

作者(Author): 王晨明,苏天赟,王国宇,宋庆磊

DOI: 10.16441/j.cnki.hdxb.20140248

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