真实感动态树场景的研究与实现

树木的动态显示在自然场景模拟中有着重要的地位。采用Cook-Torrance光照明模型和预计算的半透明贴图实现了叶片的绘制，使用梁模型导出的拟合多项式结合偏移修正实现枝干的快速形变计算，通过索引枝干层级数据贴图实现GPU中多级枝干的形变。预计算和GPU的使用使得模拟过程中真实感和实时性得以平衡。实验结果表明，该方法实现了快速真实的动态树场景渲染。

Research and implementation of realistic dynamic tree scene

Dynamic tree rendering plays an important role in the natural scenery simulation. In this paper, by using Cook-Torrance lighting model and pre-computed translucency texture, rendering scattering and translucency of the leaf were implemented. Using the polynomial fitted from tapered circular beam model expression and length correct method, the speed of calculation deform was boosted. By introducing the hierarchical branches texture with index, branches deform could be calculated in Graphic Processing Unit (GPU). Using pre-compaction and GPU helps to balance the reality and real-time in the simulation. The experiments show that the proposed method can render the dynamic tree scene vividly and rapidly.