121 lines
3.4 KiB
C++
121 lines
3.4 KiB
C++
/**********************************************************************
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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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*
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* Last port: operation/buffer/SubgraphDepthLocater.java r320 (JTS-1.12)
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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 <vector>
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#include <geos/geom/LineSegment.h> // for composition
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// Forward declarations
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namespace geos {
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namespace geom {
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class Coordinate;
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}
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namespace geomgraph {
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class DirectedEdge;
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}
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namespace operation {
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namespace buffer {
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class BufferSubgraph;
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class DepthSegment;
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}
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}
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}
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namespace geos {
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namespace operation { // geos.operation
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namespace buffer { // geos.operation.buffer
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/**
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* \class SubgraphDepthLocater
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*
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* \brief
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* Locates a subgraph inside a set of subgraphs,
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* in order to determine the outside depth of the subgraph.
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*
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* The input subgraphs are assumed to have had depths
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* already calculated for their edges.
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*
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*/
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class GEOS_DLL SubgraphDepthLocater {
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public:
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SubgraphDepthLocater(std::vector<BufferSubgraph*>* newSubgraphs)
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:
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subgraphs(newSubgraphs)
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{}
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~SubgraphDepthLocater() {}
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int getDepth(const geom::Coordinate& p);
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private:
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std::vector<BufferSubgraph*>* subgraphs;
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geom::LineSegment seg;
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/**
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* Finds all non-horizontal segments intersecting the stabbing line.
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* The stabbing line is the ray to the right of stabbingRayLeftPt.
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*
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* @param stabbingRayLeftPt the left-hand origin of the stabbing line
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* @param stabbedSegments a vector to which DepthSegments intersecting
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* the stabbing line will be added.
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*/
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void findStabbedSegments(const geom::Coordinate& stabbingRayLeftPt,
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std::vector<DepthSegment*>& stabbedSegments);
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/**
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* Finds all non-horizontal segments intersecting the stabbing line
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* in the list of dirEdges.
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* The stabbing line is the ray to the right of stabbingRayLeftPt.
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*
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* @param stabbingRayLeftPt the left-hand origin of the stabbing line
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* @param stabbedSegments the current vector of DepthSegments
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* intersecting the stabbing line will be added.
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*/
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void findStabbedSegments(const geom::Coordinate& stabbingRayLeftPt,
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std::vector<geomgraph::DirectedEdge*>* dirEdges,
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std::vector<DepthSegment*>& stabbedSegments);
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/**
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* Finds all non-horizontal segments intersecting the stabbing line
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* in the input dirEdge.
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* The stabbing line is the ray to the right of stabbingRayLeftPt.
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*
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* @param stabbingRayLeftPt the left-hand origin of the stabbing line
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* @param stabbedSegments the current list of DepthSegments intersecting
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* the stabbing line
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*/
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void findStabbedSegments(const geom::Coordinate& stabbingRayLeftPt,
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geomgraph::DirectedEdge* dirEdge,
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std::vector<DepthSegment*>& stabbedSegments);
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};
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} // namespace geos::operation::buffer
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} // namespace geos::operation
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} // namespace geos
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