filename     : Mar07.pdf
entry        : article
conference   : -
pages        : 27-46
year         : 2007
month        :
title        : GPU-Based Multiresolution Deformation Using Approximate Normal Field Reconstruction
subtitle     : -
author       : Martin Marinov, Mario Botsch, Leif Kobbelt
booktitle    : Journal of Graphics Tools
ISSN/ISBN    : 1086-7651
editor       : Ronen Barzel
publisher    : AK Peters
publ.place   : Wellesley, Massachusetts, USA
volume       : 12
issue        : 1
language     : english
keywords     : multiresolution deformation, GPU
abstract     : Multiresolution shape editing performs global deformations while
preserving fine surface details by modifying a smooth base
surface and reconstructing the modified detailed surface as a
normal displacement from it. Since two non-trivial operators
(deformation and reconstruction) are involved, the computational
complexity can become too high for real-time deformations of
complex models. We present an efficient technique for evaluating
multiresolution deformations of high-resolution triangle
meshes directly on the GPU. By precomputing the deformation
functions as well as their gradient information we can map both
the deformation and the reconstruction operator to the GPU,
which enables us to reconstruct the deformed positions and
sufficiently close approximations of the normal vectors in the
vertex shader in a single rendering pass. This allows us to
render dynamically deforming 3D models several times faster
than on the CPU. We demonstrate the application of our technique
to two modern multiresolution approaches: one based on
(irregular) displaced subdivision surfaces and the other one on
volumetric space deformation using radial basis functions.