基于动态纹理技术的实时森林绘制  

Forest Scene Rendering Method Based on Dynamic Texture

作　　者：陈红倩[1] 陈谊[1] 曹健[1] 刘鹂[1] 

机构地区：[1]北京工商大学计算机与信息工程学院,北京100048

出　　处：《计算机仿真》2012年第6期236-239,共4页Computer Simulation

摘　　要：研究实时绘制森林动态场景问题,由于森林形状复杂,实时性差,针对风力作用下的大规模森林动态场景,提出图像变形方法和动态纹理技术的森林绘制方法。使用二维图像变形技术实现树木图像在风力作用下的变形;通过将树木变形结果预计算为复合纹理,减少渲染时计算量;在实时渲染过程中,根据当前风力,选择最相近的纹理内容,通过使用动态纹理技术实时更新至Billboard;并结合顶点偏移法一起实现树木模型在风力作用下的动态运动;为加速绘制效率,利用图形硬件加速复合纹理的选择和Billboard的顶点计算。对于上万株规模的动态森林场景,通过改进方法可以实现实时绘制。To simulate the large scale forest scene in wind, proposed a fast rendering method based on the image deformation and dynamic texture technology. The deformation of trees was achieved by the deformation of the tree im- ages. The tree image deformation results were integrated into one composite texture to deduee the processing in ren- dering. The fittest texture was selected according to the wind forces. And the selected texture was updated to Billboards＇ texture using dynamic -texture technology. GPGPU （General Purpose Computation on GPU） technology was adopted to accelerate selecting textures and processing Billboard. The method has been proved feasible to simu- late the large scale dynamic forest scene by the experiments. It can render the scene containing ten thousands of trees in real time.

关 键 词：虚拟现实 森林场景 动态纹理 实时绘制 硬件加速 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]