Anisotropic Cone Mapping
Date Issued
2007
Date
2007
Author(s)
Chen, Yu-Jen
DOI
en-US
Abstract
This paper presents Anisotropic Cone Mapping (ACM), a more efficient and accurate way for calculating intersections with displacement maps. During preprocessing, for each texel of the displacement map, an asymmetric cone is
calculated as the bounding volume for the empty space above that texel. By using this information, a ray can fast skip empty space and quickly converge to its intersection with the displacement map. Thus, it allows extreme closeup and very steep angle views without noticeable artifacts. Furthermore, we propose a hierarchical adaptive method to speed up the preprocessing of ACM. The proposed method is around 6 to 11 times faster than conventional methods, thus allowing application of ACM to render dynamic displacement maps in real-time. Its suited for many real-time 3D applications like games
or interactive simulations because of their low memory cost and good performance in both rendering quality and speed.
Subjects
影像繪圖
位移映射貼圖
即時繪圖
GPU繪圖
表面細節
image-based rendering
displacement mapping
realtime rendering
GPU rendering
surface details
Type
thesis
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