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.