61 lines
1.6 KiB
C
61 lines
1.6 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) 2006 Refractions Research Inc.
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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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#pragma once
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#include <geos/export.h>
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#include <algorithm>
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#include <cassert>
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#include <cmath>
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namespace geos {
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namespace index { // geos::index
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namespace strtree { // geos::index::strtree
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/// A contiguous portion of 1D-space. Used internally by SIRtree.
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//
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/// @see SIRtree
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///
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class GEOS_DLL Interval {
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public:
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Interval(double newMin, double newMax) : imin(newMin), imax(newMax) {
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assert(std::isnan(newMin) || std::isnan(newMax) || imin <= imax);
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}
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double getMin() const { return imin; }
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double getMax() const { return imax; }
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double getWidth() const { return imax - imin; }
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double getCentre() const { return (imin + imax) / 2; }
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Interval* expandToInclude(const Interval* other) {
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imax = std::max(imax, other->imax);
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imin = std::min(imin, other->imin);
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return this;
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}
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bool intersects(const Interval* other) const {
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return !(other->imin > imax || other->imax < imin);
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}
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bool equals(const Interval* other) const {
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return imin == other->imin && imax == other->imax;
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}
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private:
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double imin;
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double imax;
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};
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} // namespace geos::index::strtree
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} // namespace geos::index
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} // namespace geos
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