摘要
球面是常见的二次曲面。它使用曲面分割原理对球面进行分割,并应用区域取样方法实现了对球面的纹理映射。为了减少计算花费,采用MIP-MAP预过滤纹理,并改进了在每一个可选的MIP-MAP层的取样率,以避免在较低层欠取样,在较高+1层过取样。这种方法能取得理想的纹理映射效果,有效解决走样问题。
Sphere is a kind of common quadric surfaces. It uses the principles of quadric surfaces subdivision to subdivide the sphere and applies the footprint area sampling method on sphere texture mapping. Prefiltering based on MIP-MAP is used to reduce the computing cost. The sampling rate is adapted in each chosen MIP-MAP level separately to avoid undersampling in level l and oversampling in level 1+1. This method can effectively obtain high quality texture mapping images and resolve the problems of aliasing.
出处
《计算机工程与设计》
CSCD
北大核心
2007年第14期3410-3412,共3页
Computer Engineering and Design
关键词
纹理映射
曲面分割
区域取样
反走样
预过滤
各向异性过滤
texture mapping
quadric surfaces subdivision
footprint area sampling
antialiasing
prefiltering
anisotropic filtering