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SAC
2010
ACM
15 years 5 months ago
Haptic manipulation of rational parametric planar cubics using shape constraints
In this paper, we show how to deform a planar rational cubic based on a local interpolation constraint while retaining the qualitative shape of the curve. An impedance-type, paral...
Christoph Fünfzig, Philippe Thomin, Gudrun Al...
SAC
2010
ACM
15 years 6 months ago
Constraint-based LN-curves
We consider the design of parametric curves from geometric constraints such as distance from lines or points and tangency to lines or circles. We solve the Hermite problem with su...
Young Joon Ahn, Christoph M. Hoffmann
SIGGRAPH
1998
ACM
15 years 4 months ago
Exact Evaluation of Catmull-Clark Subdivision Surfaces at Arbitrary Parameter Values
In this paper we disprove the belief widespread within the computer graphics community that Catmull-Clark subdivision surfaces cannot be evaluated directly without explicitly subd...
Jos Stam
MICS
2010
94views more  MICS 2010»
14 years 10 months ago
Arrangements on Parametric Surfaces I: General Framework and Infrastructure
We introduce a framework for the construction, maintenance, and manipulation of arrangements of curves embedded on certain two-dimensional orientable parametric surfaces in three-d...
Eric Berberich, Efi Fogel, Dan Halperin, Kurt Mehl...
NIPS
2003
15 years 1 months ago
A Computational Geometric Approach to Shape Analysis in Images
We present a geometric approach to statistical shape analysis of closed curves in images. The basic idea is to specify a space of closed curves satisfying given constraints, and e...
Anuj Srivastava, Xiuwen Liu, Washington Mio, Eric ...