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Geometry.h
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//# Copyright (C) 2010 by ESO (in the framework of the ALMA collaboration)
//# Copyright (C) 1996,1997,1998,1999,2000,2001
//# Associated Universities, Inc. Washington DC, USA.
//#
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//#
//# This library is distributed in the hope that it will be useful, but WITHOUT
//# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
//# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
//# License for more details.
//#
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//#
//# Correspondence concerning AIPS++ should be addressed as follows:
//# Internet email: casa-feedback@nrao.edu.
//# Postal address: AIPS++ Project Office
//# National Radio Astronomy Observatory
//# 520 Edgemont Road
//# Charlottesville, VA 22903-2475 USA
#ifndef SCIMATH_GEOMETRY_H
#define SCIMATH_GEOMETRY_H
#include <casacore/casa/aips.h>
#include <casacore/casa/Quanta/Quantum.h>
#include <utility>
namespace casacore { //# NAMESPACE CASACORE - BEGIN
// <summary>
// Geometry related methods.
// </summary>
// <use visibility=export>
//# <author>Dave Mehringer</author>
// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">
// </reviewed>
// <etymology>
// self-explanatory
// </etymology>
// <synopsis>
// Various geometry related functions
// </synopsis>
// <motivation>
// Commonly used geometrical functions for various image and region
// applications.
// </motivation>
class Geometry {
public:
// Get result of rotating a 2-D vector counterclockwise through an angle
// <src>theta</src>. The output pair will have x as the first
// member and y as the second. <src>theta</src> must have angular units (no explicit
// checking is done, but an exception will be thrown from the Quanta code if not).
static std::pair<Double, Double> rotate2D(
Double x, Double y, const Quantity& theta
);
// Determine if two coplanar line segments, a and b, intersect. Line segment a
// has end points a0 and a1, and line segment b has endpoints b0 and b1.
// Algorithm from
// http://stackoverflow.com/questions/563198/how-do-you-detect-where-two-line-segments-intersect
static Bool doLineSegmentsIntersect(
Double a0x, Double a0y, Double a1x, Double a1y,
Double b0x, Double b0y, Double b1x, Double b1y
);
};
} //# NAMESPACE CASACORE - END
#endif
casacore::Geometry
Definition Geometry.h:57
casacore::Geometry::rotate2D
static std::pair< Double, Double > rotate2D(Double x, Double y, const Quantity &theta)
Get result of rotating a 2-D vector counterclockwise through an angle theta.
casacore::Geometry::doLineSegmentsIntersect
static Bool doLineSegmentsIntersect(Double a0x, Double a0y, Double a1x, Double a1y, Double b0x, Double b0y, Double b1x, Double b1y)
Determine if two coplanar line segments, a and b, intersect.
casacore
this file contains all the compiler specific defines
Definition mainpage.dox:28
casacore::Bool
bool Bool
Define the standard types used by Casacore.
Definition aipstype.h:40
casacore::Quantity
Quantum< Double > Quantity
Definition Quantum.h:39
casacore::Double
double Double
Definition aipstype.h:53