128 lines
3.4 KiB
C++
128 lines
3.4 KiB
C++
/**
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* Polyline - store geographic line-segments */
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// Written by James Turner, started 2013.
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//
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// Copyright (C) 2013 James Turner <zakalawe@mac.com>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#ifndef FG_POLY_LINE_HXX
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#define FG_POLY_LINE_HXX
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#include <vector>
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#include <simgear/sg_inlines.h>
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#include <simgear/structure/SGSharedPtr.hxx>
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#include <simgear/math/SGMath.hxx>
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#include <simgear/math/SGBox.hxx>
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#include <simgear/math/SGGeometryFwd.hxx>
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namespace flightgear
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{
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typedef std::vector<SGGeod> SGGeodVec;
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class PolyLine;
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typedef SGSharedPtr<PolyLine> PolyLineRef;
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typedef std::vector<PolyLineRef> PolyLineList;
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/**
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* @class Store geographical linear data, with a type code.
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*
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* This is a basic in-memory model of GIS line data, without support for
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* many features; especially there is no support for per-node attributes.
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*
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* PolyLines are added to the spatial index and can be queried by passing
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* a search centre and cutoff distance.
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*/
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class PolyLine : public SGReferenced
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{
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public:
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virtual ~PolyLine();
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enum Type
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{
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INVALID = 0,
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COASTLINE,
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NATIONAL_BOUNDARY, /// aka a border
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REGIONAL_BOUNDARY, /// state / province / country / department
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RIVER,
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LAKE,
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URBAN,
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// airspace types in the future
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LAST_TYPE
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};
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Type type() const
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{ return m_type; }
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/**
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* number of points in this line - at least two.
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*/
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unsigned int numPoints() const;
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SGGeod point(unsigned int aIndex) const;
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const SGGeodVec& points() const
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{ return m_data; }
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/**
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* create poly line objects from raw input points and a type.
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* input points will be subdivided so the bounding area of each
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* polyline stays within some threshold.
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*
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*/
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static PolyLineList createChunked(Type aTy, const SGGeodVec& aRawPoints);
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static PolyLineRef create(Type aTy, const SGGeodVec& aRawPoints);
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static void bulkAddToSpatialIndex(PolyLineList::const_iterator begin,
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PolyLineList::const_iterator end);
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/**
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* retrieve all the lines within a range of a search point.
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* lines are returned if any point is near the search location.
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*/
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static PolyLineList linesNearPos(const SGGeod& aPos, double aRangeNm, Type aTy);
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class TypeFilter
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{
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public:
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virtual bool pass(Type aTy) const = 0;
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};
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static PolyLineList linesNearPos(const SGGeod& aPos, double aRangeNm, const TypeFilter& aFilter);
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SGBoxd cartesianBox() const;
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void addToSpatialIndex() const;
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private:
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PolyLine(Type aTy, const SGGeodVec& aPoints);
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Type m_type;
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SGGeodVec m_data;
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};
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} // of namespace flightgear
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#endif
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