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/**********************************************************************
* $Id: NodingValidator.cpp,v 1.4 2004/11/01 16:43:04 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 Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************/
#include <geos/noding.h>
namespace geos {
NodingValidator::NodingValidator(vector<SegmentString*> *newSegStrings)
{
segStrings=newSegStrings;
li=new RobustLineIntersector();
}
NodingValidator::~NodingValidator()
{
delete li;
}
void
NodingValidator::checkValid()
{
checkNoInteriorPointsSame();
checkProperIntersections();
}
void
NodingValidator::checkProperIntersections()
{
for (int i=0; i<(int)segStrings->size();i++) {
SegmentString *ss0=(*segStrings)[i];
for (int j=0; j<(int)segStrings->size();j++) {
SegmentString *ss1=(*segStrings)[j];
checkProperIntersections(ss0, ss1);
}
}
}
void
NodingValidator::checkProperIntersections(SegmentString *ss0, SegmentString *ss1)
{
const CoordinateSequence *pts0=ss0->getCoordinates();
const CoordinateSequence *pts1=ss1->getCoordinates();
for (int i0=0;i0<pts0->getSize()-1; i0++) {
for (int i1=0;i1<pts1->getSize()-1; i1++) {
checkProperIntersections(ss0, i0, ss1, i1);
}
}
}
void
NodingValidator::checkProperIntersections(SegmentString *e0, int segIndex0, SegmentString *e1, int segIndex1)
{
if (e0 == e1 && segIndex0 == segIndex1) return;
//numTests++;
Coordinate p00=e0->getCoordinates()->getAt(segIndex0);
Coordinate p01=e0->getCoordinates()->getAt(segIndex0+1);
Coordinate p10=e1->getCoordinates()->getAt(segIndex1);
Coordinate p11=e1->getCoordinates()->getAt(segIndex1+1);
li->computeIntersection(p00, p01, p10, p11);
if (li->hasIntersection()) {
if ( li->isProper()
|| hasInteriorIntersection(li, p00, p01)
|| hasInteriorIntersection(li, p00, p01)) {
throw new GEOSException("found non-noded intersection at "+ p00.toString() + "-" + p01.toString()+ " and "+ p10.toString() + "-" + p11.toString());
}
}
}
/**
* @return true if there is an intersection point which is not an
* endpoint of the segment p0-p1
*/
bool
NodingValidator::hasInteriorIntersection(LineIntersector *aLi, Coordinate& p0, Coordinate& p1)
{
for (int i = 0; i < aLi->getIntersectionNum(); i++)
{
const Coordinate &intPt=aLi->getIntersection(i);
if (!(intPt==p0 || intPt==p1))
return true;
}
return false;
}
void
NodingValidator::checkNoInteriorPointsSame()
{
for (int i=0; i<(int)segStrings->size();i++) {
SegmentString *ss0=(*segStrings)[i];
const CoordinateSequence *pts=ss0->getCoordinates();
checkNoInteriorPointsSame(pts->getAt(0), segStrings);
checkNoInteriorPointsSame(pts->getAt(pts->getSize()-1), segStrings);
}
}
void
NodingValidator::checkNoInteriorPointsSame(const Coordinate& testPt,vector<SegmentString*> *aSegStrings)
{
for (int i=0; i<(int)segStrings->size();i++) {
SegmentString *ss0=(*segStrings)[i];
const CoordinateSequence *pts=ss0->getCoordinates();
for (int j=1;j<pts->getSize()-1; j++) {
if (pts->getAt(j)==testPt)
throw new GEOSException("found bad noding at pt " + testPt.toString());
}
}
}
} // namespace geos
/**********************************************************************
* $Log: NodingValidator.cpp,v $
* Revision 1.4 2004/11/01 16:43:04 strk
* Added Profiler code.
* Temporarly patched a bug in DoubleBits (must check drawbacks).
* Various cleanups and speedups.
*
* Revision 1.3 2004/07/08 19:34:49 strk
* Mirrored JTS interface of CoordinateSequence, factory and
* default implementations.
* Added DefaultCoordinateSequenceFactory::instance() function.
*
* Revision 1.2 2004/07/02 13:28:27 strk
* Fixed all #include lines to reflect headers layout change.
* Added client application build tips in README.
*
* Revision 1.1 2004/03/26 07:48:30 ybychkov
* "noding" package ported (JTS 1.4)
*
*
**********************************************************************/
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