144 lines
3.2 KiB
C++
144 lines
3.2 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) 2005-2006 Refractions Research Inc.
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* Copyright (C) 2001-2002 Vivid Solutions 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: geomgraph/Depth.java rev. 1.4 (JTS-1.10)
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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/Location.h>
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#include <geos/geom/Position.h>
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#include <string>
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#include <cstdint>
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// Forward declarations
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namespace geos {
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namespace geomgraph {
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class Label;
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}
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}
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namespace geos {
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namespace geomgraph { // geos.geomgraph
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/// \brief A Depth object records the topological depth of the sides of an Edge
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/// for up to two Geometries.
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class GEOS_DLL Depth {
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private:
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static constexpr int NULL_VALUE = -1; // Replaces NULL
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int depth[2][3];
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public:
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static int depthAtLocation(geom::Location location)
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{
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if(location == geom::Location::EXTERIOR) {
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return 0;
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}
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if(location == geom::Location::INTERIOR) {
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return 1;
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}
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return NULL_VALUE;
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};
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Depth()
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{
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// initialize depth array to a sentinel value
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for(std::size_t i = 0; i < 2; i++) {
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for(std::size_t j = 0; j < 3; j++) {
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depth[i][j] = NULL_VALUE;
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}
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}
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};
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virtual ~Depth() = default; // FIXME: shouldn't be virtual!
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int getDepth(int geomIndex, int posIndex) const
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{
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return depth[geomIndex][posIndex];
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};
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void setDepth(int geomIndex, int posIndex, int depthValue)
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{
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depth[geomIndex][posIndex] = depthValue;
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};
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geom::Location getLocation(int geomIndex, int posIndex) const
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{
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if(depth[geomIndex][posIndex] <= 0) {
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return geom::Location::EXTERIOR;
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}
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return geom::Location::INTERIOR;
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};
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void add(int geomIndex, int posIndex, geom::Location location)
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{
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if(location == geom::Location::INTERIOR) {
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depth[geomIndex][posIndex]++;
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}
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};
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/**
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* A Depth object is null (has never been initialized) if all depths are null.
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*/
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bool isNull() const
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{
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for(std::size_t i = 0; i < 2; i++) {
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for(std::size_t j = 0; j < 3; j++) {
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if(depth[i][j] != NULL_VALUE) {
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return false;
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}
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}
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}
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return true;
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};
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bool isNull(uint8_t geomIndex) const
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{
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return depth[geomIndex][1] == NULL_VALUE;
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};
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bool isNull(uint8_t geomIndex, uint8_t posIndex) const
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{
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return depth[geomIndex][posIndex] == NULL_VALUE;
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};
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int getDelta(int geomIndex) const
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{
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return depth[geomIndex][geom::Position::RIGHT] - depth[geomIndex][geom::Position::LEFT];
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};
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void normalize();
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void add(const Label& lbl);
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std::string toString() const;
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};
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} // namespace geos.geomgraph
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} // namespace geos
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