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/**********************************************************************
* $Id: Depth.cpp 1820 2006-09-06 16:54:23Z mloskot $
*
* GEOS - Geometry Engine Open Source
* http://geos.refractions.net
*
* Copyright (C) 2001-2002 Vivid Solutions Inc.
* Copyright (C) 2005 Refractions Research 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.
*
**********************************************************************/
#include <sstream>
#include <string>
#include <geos/geomgraph/Depth.h>
#include <geos/geomgraph/Label.h>
#include <geos/geomgraph/Position.h>
#include <geos/geom/Location.h>
#define DEPTHNULL -1
using namespace std;
using namespace geos::geom;
namespace geos {
namespace geomgraph { // geos.geomgraph
int
Depth::depthAtLocation(int location)
{
if (location == Location::EXTERIOR) return 0;
if (location == Location::INTERIOR) return 1;
return DEPTHNULL;
}
Depth::Depth()
{
// initialize depth array to a sentinel value
for (int i=0; i<2; i++) {
for (int j=0; j<3;j++) {
depth[i][j]=DEPTHNULL;
}
}
}
Depth::~Depth()
{
// delete[] &depth;
}
int
Depth::getDepth(int geomIndex,int posIndex) const
{
return depth[geomIndex][posIndex];
}
void
Depth::setDepth(int geomIndex,int posIndex,int depthValue)
{
depth[geomIndex][posIndex] = depthValue;
}
int
Depth::getLocation(int geomIndex,int posIndex) const
{
if (depth[geomIndex][posIndex] <= 0) return Location::EXTERIOR;
return Location::INTERIOR;
}
void
Depth::add(int geomIndex,int posIndex,int location)
{
if (location == Location::INTERIOR)
depth[geomIndex][posIndex]++;
}
/**
* A Depth object is null (has never been initialized) if all depths are null.
*/
bool
Depth::isNull() const
{
for (int i=0; i<2; i++) {
for (int j=0; j<3; j++) {
if (depth[i][j] != DEPTHNULL)
return false;
}
}
return true;
}
bool
Depth::isNull(int geomIndex) const
{
return depth[geomIndex][1] == DEPTHNULL;
}
bool
Depth::isNull(int geomIndex, int posIndex) const
{
return depth[geomIndex][posIndex] == DEPTHNULL;
}
int
Depth::getDelta(int geomIndex) const
{
return depth[geomIndex][Position::RIGHT]-depth[geomIndex][Position::LEFT];
}
/**
* Normalize the depths for each geometry, if they are non-null.
* A normalized depth
* has depth values in the set { 0, 1 }.
* Normalizing the depths
* involves reducing the depths by the same amount so that at least
* one of them is 0. If the remaining value is > 0, it is set to 1.
*/
void
Depth::normalize()
{
for (int i=0; i<2; i++) {
if (!isNull(i)) {
int minDepth=depth[i][1];
if (depth[i][2]<minDepth)
minDepth=depth[i][2];
if (minDepth<0) minDepth = 0;
for (int j=1; j<3; j++) {
int newValue=0;
if (depth[i][j]>minDepth)
newValue = 1;
depth[i][j] = newValue;
}
}
}
}
void
Depth::add(const Label& lbl)
{
for (int i=0; i<2; i++) {
for (int j=1; j<3; j++) {
int loc=lbl.getLocation(i,j);
if (loc==Location::EXTERIOR || loc==Location::INTERIOR)
{
// initialize depth if it is null, otherwise
// add this location value
if (isNull(i,j)) {
depth[i][j]=depthAtLocation(loc);
} else
depth[i][j]+=depthAtLocation(loc);
}
}
}
}
string
Depth::toString() const
{
ostringstream s;
s<<"A:"<<depth[0][1]<<","<<depth[0][2]<<" ";
s<<"B:"<<depth[1][1]<<","<<depth[1][2]<<"]";
return s.str();
}
} // namespace geos.geomgraph
} // namespace geos
/**********************************************************************
* $Log$
* Revision 1.7 2006/03/15 17:16:29 strk
* streamlined headers inclusion
*
* Revision 1.6 2006/03/03 10:46:21 strk
* Removed 'using namespace' from headers, added missing headers in .cpp files, removed useless includes in headers (bug#46)
*
* Revision 1.5 2006/02/19 19:46:49 strk
* Packages <-> namespaces mapping for most GEOS internal code (uncomplete, but working). Dir-level libs for index/ subdirs.
*
* Revision 1.4 2005/11/14 18:14:03 strk
* Reduced heap allocations made by TopologyLocation and Label objects.
* Enforced const-correctness on GraphComponent.
* Cleanups.
*
* Revision 1.3 2005/01/28 09:47:51 strk
* Replaced sprintf uses with ostringstream.
*
* Revision 1.2 2004/07/02 13:28:26 strk
* Fixed all #include lines to reflect headers layout change.
* Added client application build tips in README.
*
* Revision 1.1 2004/03/19 09:48:45 ybychkov
* "geomgraph" and "geomgraph/indexl" upgraded to JTS 1.4
*
* Revision 1.10 2003/11/07 01:23:42 pramsey
* Add standard CVS headers licence notices and copyrights to all cpp and h
* files.
*
*
**********************************************************************/
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