GEOS
3.9.1dev
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Implements an algorithm to compute the sign of a 2x2 determinant for double precision values robustly. More...
#include <RobustDeterminant.h>
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static int | signOfDet2x2 (double x1, double y1, double x2, double y2) |
Computes the sign of the determinant of the 2x2 matrix with the given entries, in a robust way. More... | |
Implements an algorithm to compute the sign of a 2x2 determinant for double precision values robustly.
It is a direct translation of code developed by Olivier Devillers.
The original code carries the following copyright notice:
The original code carries the following copyright notice: Author : Olivier Devillers Olivi er.D evill ers@ sophi a.in ria.f rhttp:/www.inria.fr:/prisme/personnel/devillers/anglais/determinant.html
Copyright (c) 1995 by INRIA Prisme Project BP 93 06902 Sophia Antipolis Cedex, France. All rights reserved
Definition at line 51 of file RobustDeterminant.h.
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Computes the sign of the determinant of the 2x2 matrix with the given entries, in a robust way.