83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
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/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2018 Paul Ramsey <pramsey@cleverlephant.ca>
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************
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*
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* Last port: algorithm/Area.java @ 2017-09-04
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*
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**********************************************************************/
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#pragma once
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#include <geos/export.h>
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#include <geos/geom/Coordinate.h>
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#include <geos/geom/CoordinateSequence.h>
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namespace geos {
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namespace geom {
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class Curve;
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}
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namespace algorithm { // geos::algorithm
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class GEOS_DLL Area {
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public:
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static double ofClosedCurve(const geom::Curve& ring);
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/**
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* Computes the area for a ring.
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*
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* @param ring the coordinates forming the ring
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* @return the area of the ring
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*/
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static double ofRing(const std::vector<geom::Coordinate>& ring);
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/**
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* Computes the area for a ring.
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*
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* @param ring the coordinates forming the ring
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* @return the area of the ring
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*/
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static double ofRing(const geom::CoordinateSequence* ring);
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/**
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* Computes the signed area for a ring. The signed area is positive if the
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* ring is oriented CW, negative if the ring is oriented CCW, and zero if the
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* ring is degenerate or flat.
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*
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* @param ring
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* the coordinates forming the ring
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* @return the signed area of the ring
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*/
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static double ofRingSigned(const std::vector<geom::Coordinate>& ring);
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/**
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* Computes the signed area for a ring. The signed area is positive if the
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* ring is oriented CW, negative if the ring is oriented CCW, and zero if the
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* ring is degenerate or flat.
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*
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* @param ring
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* the coordinates forming the ring
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* @return the signed area of the ring
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*/
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static double ofRingSigned(const geom::CoordinateSequence* ring);
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};
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} // namespace geos::algorithm
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} // namespace geos
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