风场作用下大规模草地场景动态模拟

Dynamic simulation of large-scale grassland in wind

草体作为自然场景的一种重要元素,其数量众多、覆盖范围广,很难实现实时动态模拟。针对已有方法存在的问题,提出了一种风场作用下大规模草地场景动态模拟方法,首先利用混合式表达方法构建出大规模静态草地场景,通过二维向量建立风场模型,采用混合动力学方程以及移动布告板上端顶点的方法,分别模拟出离视点不同距离的草体在风场作用下的形变。实验结果表明,该方法不仅能绘制出风场中草体随风摆动的逼真效果,同时对可变风场有很好的支持。

Grass is one of the nature elements,due to its large number and wide covering range,the dynamic simulation of large-scale grassland in real-time is difficult. In view of the deficiency of the existing methods,this paper proposed a method for dynamic simulation of large-scale grassland in wind. Constructed large-scale static grassland based on hybrid representation. Established wind field model by two-dimensional vector. According to the distance from the viewer,simulated the deformation of grass by mixed-kinetic equation and moving the top vertexes of billboard. Experiments show that this method not only can realistically render the animated grass scenes under wind,but also can support the variable wind field.