一种实时生成物理弹坑模型可变地形建模方法

A real-time deformation method for terrain model based on physical crater model

针对动态地形弹坑模型可视化需求,提出一种实时可变地形建模方法。以隐式层次结构建立自适应多分辨率地形模型,结合物理弹坑模型,根据爆炸事件发生位置的不同,实时观测地形的形变效果。为了表现弹坑模型细节,采用全分辨率物理弹坑模型建模方法。根据入射方向和地势特征不同,提出了形变区域扩展算法,确定弹坑最小投影区域范围,在隐式层次结构上定义了活跃点,实现多分辨率地形与弹坑模型的无缝融合。以上方法在多个真实地形数据上进行了实验研究,结合不同地貌实现了基于物理弹坑的形变效果,结果表明形变后的地形模型满足空间连续性,符合虚拟环境对动态地形的仿真要求。

In order to meet the requirement of terrain dynamic modeling, a real-time modeling method for variable terrain is proposed. An adaptive multi-resolution model based on the connotative hierarchical structure is established, combined with physical-crater model. According to the different explosion position, the real-time terrain deformation effects can be rendered. To keep the details of physical-crater, the grid model with full resolution is adopted to build the carter model. According to the different incident direction and terrain features, an algorithm about deformation region extension is presented. Furthermore, the minimum projection area of crater is determined, and then the active points on the connotative hierarchical structure are defined. After changing the state of active points, the seamless fusion between the multi-resolution terrain and the crater model is realized. The above methods are applied to many benchmark data with different landform. The result, the deformation terrain model can realize space continuity. The dynamic terrain modeling approach meets the requirements of virtual environment simulation.