摘要
针对典型地貌全局光渲染中的重点问题:环境遮挡以及色溢的渲染效率和效果,提出光线追踪、光能传递以外的另一种改进方法——点云计算方式。分析了点云算法的原理、特点和优越性,选取张家界石英砂岩峰林地貌三维模型作为样本,测试和比较了光线追踪和点云计算方法的实际效果,实验表明点云计算方式有更高的效率和更好的表现效果,论文也为其他典型地貌的全局光渲染提供了可行的制作方案和流程。
In the global illumination rendering for typical landforms,there are two key problems, namely , the efficiency and effectiveness of ambient occlusion and color bleeding . The paper presents an improved method other than the raytracing and radiosity method,which is called point cloud .We analyze the principle, characteristics and advantages of point cloud algorithm. By choosing Zhangjiajie quartz sandstone peak forest landforms as a sample,we set up a 3d model to test and compare the actual effects of ray tracing and point cloud method. Experiments show that point cloud method has higher efficiency and better effect. Paper also provides the feasible production solution and process for global illumination rendering of other typical landforms .
出处
《科技通报》
北大核心
2014年第11期136-141,共6页
Bulletin of Science and Technology
基金
国家自然科学基金青年基金项目(项目编号:41201338)
关键词
点云
典型地貌
全局光渲染
环境遮挡
色溢
point cloud
typical landforms
global illumination rendering
ambient occlusion
color bleeding
