Depth.h
/**********************************************************************
*
* GEOS - Geometry Engine Open Source
* http://geos.osgeo.org
*
* Copyright (C) 2005-2006 Refractions Research Inc.
* Copyright (C) 2001-2002 Vivid Solutions Inc.
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************
*
* Last port: geomgraph/Depth.java rev. 1.4 (JTS-1.10)
*
**********************************************************************/
#pragma once
#include <geos/export.h>
#include <geos/geom/Location.h>
#include <geos/geom/Position.h>
#include <string>
#include <cstdint>
// Forward declarations
namespace geos {
namespace geomgraph {
class Label;
}
}
namespace geos {
namespace geomgraph { // geos.geomgraph
class GEOS_DLL Depth {
private:
static constexpr int NULL_VALUE = -1; // Replaces NULL
int depth[2][3];
public:
static int depthAtLocation(geom::Location location)
{
if(location == geom::Location::EXTERIOR) {
return 0;
}
if(location == geom::Location::INTERIOR) {
return 1;
}
return NULL_VALUE;
};
Depth()
{
// initialize depth array to a sentinel value
for(std::size_t i = 0; i < 2; i++) {
for(std::size_t j = 0; j < 3; j++) {
depth[i][j] = NULL_VALUE;
}
}
};
virtual ~Depth() = default; // FIXME: shouldn't be virtual!
int getDepth(int geomIndex, int posIndex) const
{
return depth[geomIndex][posIndex];
};
void setDepth(int geomIndex, int posIndex, int depthValue)
{
depth[geomIndex][posIndex] = depthValue;
};
geom::Location getLocation(int geomIndex, int posIndex) const
{
if(depth[geomIndex][posIndex] <= 0) {
return geom::Location::EXTERIOR;
}
return geom::Location::INTERIOR;
};
void add(int geomIndex, int posIndex, geom::Location location)
{
if(location == geom::Location::INTERIOR) {
depth[geomIndex][posIndex]++;
}
};
bool isNull() const
{
for(std::size_t i = 0; i < 2; i++) {
for(std::size_t j = 0; j < 3; j++) {
if(depth[i][j] != NULL_VALUE) {
return false;
}
}
}
return true;
};
bool isNull(uint8_t geomIndex) const
{
return depth[geomIndex][1] == NULL_VALUE;
};
bool isNull(uint8_t geomIndex, uint8_t posIndex) const
{
return depth[geomIndex][posIndex] == NULL_VALUE;
};
int getDelta(int geomIndex) const
{
return depth[geomIndex][geom::Position::RIGHT] - depth[geomIndex][geom::Position::LEFT];
};
void normalize();
void add(const Label& lbl);
std::string toString() const;
};
} // namespace geos.geomgraph
} // namespace geos
geos::geomgraph::Depth::isNull
bool isNull() const
Definition Depth.h:104
geos::geomgraph::Label
A Label indicates the topological relationship of a component of a topology graph to a given Geometry...
Definition Label.h:57
geos::geom::Location
Location
Constants representing the location of a point relative to a geometry.
Definition Location.h:32
geos::geom::Location::EXTERIOR
@ EXTERIOR
Definition Location.h:57
geos::geom::Location::INTERIOR
@ INTERIOR
Definition Location.h:43
geos::geomgraph
Contains classes that implement topology graphs.
Definition Depth.h:31
geos
Basic namespace for all GEOS functionalities.
Definition geos.h:38