Displaced subdivision surfaces
ACM SIGGRAPH 2000 Proceedings, 85-94.
Automatic conversion of detailed mesh to displaced surface, and its benefits.
In this paper we introduce a new surface representation, the displaced subdivision surface. It
represents a detailed surface model as a scalar-valued displacement over a smooth domain surface. Our
representation defines both the domain surface and the displacement function using a unified subdivision
framework, allowing for simple and efficient evaluation of analytic surface properties. We present a
simple, automatic scheme for converting detailed geometric models into such a representation. The
challenge in this conversion process is to find a simple subdivision surface that still faithfully
expresses the detailed model as its offset. We demonstrate that displaced subdivision surfaces offer a
number of benefits, including geometry compression, editing, animation, scalability, and adaptive
rendering. In particular, the encoding of fine detail as a scalar function makes the
representation extremely compact.
The Curved PN triangle
involves simple accesses to the vertex buffer.
Although that surface representation is not C1, it may be "smooth enough"
to be similarly used as a domain surface for displacement mapping.
ACM Copyright Notice
Copyright by the Association for Computing Machinery, Inc. Permission to make digital or
hard copies of part or all of this work for personal or classroom use is granted without fee provided that
copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the
full citation on the first page. Copyrights for components of this work owned by others than ACM must be
honored. Abstracting with credit is permitted. To copy otherwise, to republish, to post on servers, or to
redistribute to lists, requires prior specific permission and/or a fee. Request permissions from Publications
Dept, ACM Inc., fax +1 (212) 869-0481, or email@example.com. The definitive version of this paper can be
found at ACM's Digital Library http://www.acm.org/dl/.