node.cpp

来自「一个很好的vc底层代码」· C++ 代码 · 共 231 行

/**********************************************************************
 * $Id: Node.cpp,v 1.10.2.2 2005/06/28 00:05:50 strk Exp $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * 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.
 *
 **********************************************************************/

#include <geos/geomgraph.h>
//#include "../headers/util.h"

#ifndef DEBUG
#define DEBUG 0
#endif
#ifndef COMPUTE_Z
#define COMPUTE_Z 1
#endif

namespace geos {

Node::Node(Coordinate& newCoord, EdgeEndStar* newEdges): GraphComponent(new Label(0,Location::UNDEF)) {
	coord=newCoord;
#if DEBUG
	cerr<<"["<<this<<"] Node::Node("<<newCoord.toString()<<")"<<endl;
#endif

#if COMPUTE_Z
	ztot = 0;
	addZ(newCoord.z);
	if ( newEdges )
	{
		vector<EdgeEnd*>*eev = newEdges->getEdges();
		for (unsigned int i=0; i<eev->size(); i++)
		{
			EdgeEnd *ee = (*eev)[i];
			addZ(ee->getCoordinate().z);
		}
	}
#endif // COMPUTE_Z

	edges=newEdges;
}

Node::~Node(){
#if DEBUG
	cerr<<"["<<this<<"] Node::~Node()"<<endl;
#endif
	delete edges;
}

const Coordinate& Node::getCoordinate() const {
	return coord;
}

EdgeEndStar* Node::getEdges() {
	return edges;
}

bool Node::isIsolated() {
	return (label->getGeometryCount()==1);
}

void Node::add(EdgeEnd *e) {
#if DEBUG
	cerr<<"["<<this<<"] Node::add("<<e->print()<<")"<<endl;
#endif
	// Assert: start pt of e is equal to node point
	if (edges==NULL) edges=new EdgeEndStar();
	edges->insert(e);
	e->setNode(this);
#if COMPUTE_Z
	addZ(e->getCoordinate().z);
#endif
}

void Node::mergeLabel(const Node* n) {
	mergeLabel(n->label);
}

void Node::mergeLabel(const Label* label2) {
	for (int i=0; i<2; i++) {
		int loc=computeMergedLocation(label2, i);
		int thisLoc=label->getLocation(i);
		if (thisLoc==Location::UNDEF) label->setLocation(i,loc);
	}
}

void Node::setLabel(int argIndex, int onLocation) {
	if (label==NULL) {
		label=new Label(argIndex, onLocation);
	} else
		label->setLocation(argIndex, onLocation);
}

void Node::setLabelBoundary(int argIndex) {
	int loc=Location::UNDEF;
	if (label!=NULL)
		loc=label->getLocation(argIndex);
	// flip the loc
	int newLoc;
	switch (loc){
		case Location::BOUNDARY: newLoc=Location::INTERIOR; break;
		case Location::INTERIOR: newLoc=Location::BOUNDARY; break;
		default: newLoc=Location::BOUNDARY;  break;
	}
	label->setLocation(argIndex, newLoc);
}

int Node::computeMergedLocation(const Label* label2, int eltIndex){
	int loc=Location::UNDEF;
	loc=label->getLocation(eltIndex);
	if (!label2->isNull(eltIndex)) {
		int nLoc=label2->getLocation(eltIndex);
		if (loc!=Location::BOUNDARY) loc=nLoc;
	}
	return loc;
}

string Node::print(){
	string out="node "+coord.toString()+" lbl: "+label->toString();
	return out;
}

void
Node::addZ(double z)
{
#if DEBUG
	cerr<<"["<<this<<"] Node::addZ("<<z<<")";
#endif
	if ( ISNAN(z) )
	{
#if DEBUG
		cerr<<" skipped"<<endl;
#endif
		return;
	}
	for (unsigned int i=0; i<zvals.size(); i++) if ( zvals[i] == z )
	{
#if DEBUG
		cerr<<" already stored"<<endl;
#endif
		return;
	}
	zvals.push_back(z);
	ztot+=z;
	coord.z=ztot/zvals.size();
#if DEBUG
	cerr<<" added "<<z<<": ["<<ztot<<"/"<<zvals.size()<<"="<<coord.z<<"]"<<endl;
#endif
}

const vector<double>&
Node::getZ() const
{
	return zvals;
}

bool
Node::isIncidentEdgeInResult() const
{
	vector<EdgeEnd*>*v = edges->getEdges();
	unsigned int size = v->size();
	for (unsigned int i=0; i<size; i++)
	{
		DirectedEdge *de = (DirectedEdge *)(*v)[i];
		if ( de->getEdge()->isInResult() ) return true;
	}
	return false;
}

} // namespace geos

/**********************************************************************
 * $Log: Node.cpp,v $
 * Revision 1.10.2.2  2005/06/28 00:05:50  strk
 * improved ::isIncidentEdgeInResult() method
 *
 * Revision 1.10.2.1  2005/06/26 09:40:19  strk
 * Backport of OverlayOp performance improvements
 *
 * Revision 1.10  2004/12/08 13:54:43  strk
 * gcc warnings checked and fixed, general cleanups.
 *
 * Revision 1.9  2004/11/29 16:05:33  strk
 * Fixed a bug in LineIntersector::interpolateZ causing NaN values
 * to come out.
 * Handled dimensional collapses in ElevationMatrix.
 * Added ISNAN macro and changed ISNAN/FINITE macros to avoid
 * dispendious isnan() and finite() calls.
 *
 * Revision 1.8  2004/11/26 09:53:48  strk
 * Added more FINITE calls, and added inf and -inf to FINITE checks
 *
 * Revision 1.7  2004/11/20 15:41:18  strk
 * Added management of vector of composing Z values.
 *
 * Revision 1.6  2004/11/19 10:10:23  strk
 * COMPUTE_Z re-enabled by default
 *
 * Revision 1.5  2004/11/17 15:09:08  strk
 * Changed COMPUTE_Z defaults to be more conservative
 *
 * Revision 1.4  2004/11/17 08:13:16  strk
 * Indentation changes.
 * Some Z_COMPUTATION activated by default.
 *
 * Revision 1.3  2004/10/21 22:29:54  strk
 * Indentation changes and some more COMPUTE_Z rules
 *
 * 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 1.12  2003/11/07 01:23:42  pramsey
 * Add standard CVS headers licence notices and copyrights to all cpp and h
 * files.
 *
 *
 **********************************************************************/