73 lines
2.4 KiB
C++
73 lines
2.4 KiB
C++
/*
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Copyright (c) 2013, Project OSRM, Dennis Luxen, others
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef DOUGLASPEUCKER_H_
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#define DOUGLASPEUCKER_H_
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#include "../Util/SimpleLogger.h"
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#include <osrm/Coordinate.h>
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#include <boost/assert.hpp>
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#include <boost/foreach.hpp>
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#include <cmath>
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#include <limits>
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#include <stack>
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#include <vector>
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/* This class object computes the bitvector of indicating generalized input
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* points according to the (Ramer-)Douglas-Peucker algorithm.
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*
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* Input is vector of pairs. Each pair consists of the point information and a
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* bit indicating if the points is present in the generalization.
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* Note: points may also be pre-selected*/
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struct SegmentInformation;
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class DouglasPeucker {
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private:
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typedef std::pair<std::size_t, std::size_t> PairOfPoints;
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//Stack to simulate the recursion
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std::stack<PairOfPoints> recursion_stack;
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double ComputeDistance(
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const FixedPointCoordinate& point,
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const FixedPointCoordinate& segA,
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const FixedPointCoordinate& segB
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) const;
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public:
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void Run(
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std::vector<SegmentInformation> & input_geometry,
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const unsigned zoom_level
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);
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};
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#endif /* DOUGLASPEUCKER_H_ */
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