Sciweavers

CCCG
2003
13 years 6 months ago
On Coherent Rotation Angles for As-Rigid-As-Possible Shape Interpolation
Morphing algorithms aim to construct visually pleasing interpolations (morphs) between 2D or 3D shapes. One of the desirable properties of a morph is avoiding selfintersections of...
Jaeil Choi, Andrzej Szymczak
CCCG
2003
13 years 6 months ago
Curves of width one and the river shore problem
We consider the problem of finding the shortest curve in the plane that has unit width. This problem was first posed as the “river shore” puzzle by Ogilvy (1972) and is rela...
Timothy M. Chan, Alexander Golynski, Alejandro L&o...
CCCG
2003
13 years 6 months ago
On the Complexity of Halfspace Volume Queries
Given a polyhedron P in Rd with n vertices, a halfspace volume query asks for the volume of P ∩ H for a given halfspace H. We show that, for d ≥ 3, such queries can require ...
Erik D. Demaine, Jeff Erickson, Stefan Langerman
CCCG
2003
13 years 6 months ago
Transversals to line segments in R3
We completely describe the structure of the connected components of transversals to a collection of n arbitrary line segments in R3 . We show that n 3 line segments in R3 admit 0,...
Hervé Brönnimann, Hazel Everett, Sylva...
CCCG
2003
13 years 6 months ago
Parallel morphing of trees and cycles
We prove that for any two simple chains [more generally, trees] in Rd with corresponding edges parallel, there is a parallel morph between them—i.e. a morph in which all interme...
Therese C. Biedl, Anna Lubiw, Michael J. Spriggs
CCCG
2003
13 years 6 months ago
On the worst-case complexity of the silhouette of a polytope
We give conditions under which the worst-case size of the silhouette of a polytope is sub-linear.
Helmut Alt, Marc Glisse, Xavier Goaoc
CCCG
2003
13 years 6 months ago
On the Number of Pseudo-Triangulations of Certain Point Sets
We pose a monotonicity conjecture on the number of pseudo-triangulations of any planar point set, and check it on two prominent families of point sets, namely the so-called double...
Oswin Aichholzer, David Orden, Francisco Santos, B...
CCCG
2003
13 years 6 months ago
Degree Bounds for Constrained Pseudo-Triangulations
We introduce the concept of a constrained pointed pseudo-triangulation TG of a point set S with respect to a pointed planar straight line graph G = (S, E). For the case that G for...
Oswin Aichholzer, Michael Hoffmann, Bettina Speckm...
CCCG
2003
13 years 6 months ago
Multidimensional Orthogonal Range Search Using Tries
We present a novel k-dimensional range search algorithm for reporting all k-d rectangles from a set D of size n intersecting a query rectangle. Our algorithm uses 2kd tries to sol...
Lingke Bu, Bradford G. Nickerson