摘要
探讨了真实感积雪场景的实时绘制技术。基于四叉树的层次细节模型确定了积雪存储的有效点并使这些积雪有效点自适应地形变化。积雪收集因子的引入使得积雪过程的模拟更加符合地形的特点。在渲染中通过计算每个有效点的法向量增强光照效果,并采用混合方法模拟积雪逐步增多的过程,使积雪产生了厚度感。实验结果也进一步验证了该方法满足了真实感与实时性这两个方面的要求。
We discuss the simulation of realistic snow scene and contrive a method of real-time snow rendering. We determine the effective points storing snow based on Quad-tree Level of Detail Model and make these points be adap- ted to rugged terrain of the ups and downs. In the course of the snow, we further consider the characteristics of the terrain and set the snow collection factor for each point. In rendering an effective point, we compute the normal vec- tors to improve the interaction with light effects. We introduce ＂blend＂ to simulate the gradual increase in the pro- gress of snow and improve the visual effect of snow cover from scratch to have a sense of snow thickness of the tradi- tional methods. Experimental results further show that the method satisfied both the realistic and real-time needs.
出处
《苏州大学学报（工科版）》
CAS
2012年第2期27-32,共6页
Journal of Soochow University Engineering Science Edition (Bimonthly)
关键词
积雪场景
实时绘制
地形
LOD
混合
snow scene
realtime randering
rugged terrain
LOD
blend
