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/**********************************************************************
* $Id: EnhancedPrecisionOp.cpp,v 1.2 2004/07/02 13:28:29 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.
*
**********************************************************************
* $Log: EnhancedPrecisionOp.cpp,v $
* Revision 1.2 2004/07/02 13:28:29 strk
* Fixed all #include lines to reflect headers layout change.
* Added client application build tips in README.
*
* Revision 1.1 2004/04/10 22:41:25 ybychkov
* "precision" upgraded to JTS 1.4
*
*
**********************************************************************/
#include <geos/precision.h>
#include <geos/util.h>
namespace geos {
/**
* Computes the set-theoretic intersection of two {@link Geometry}s, using enhanced precision->
* @param geom0 the first Geometry
* @param geom1 the second Geometry
* @return the Geometry representing the set-theoretic intersection of the input Geometries->
*/
Geometry* EnhancedPrecisionOp::intersection(Geometry *geom0, Geometry *geom1) {
GEOSException *originalEx;
try {
Geometry *result = geom0->intersection(geom1);
return result;
} catch (GEOSException *ex) {
originalEx = ex;
}
/*
* If we are here, the original op encountered a precision problem
* (or some other problem)-> Retry the operation with
* enhanced precision to see if it succeeds
*/
try {
CommonBitsOp *cbo = new CommonBitsOp(true);
Geometry *resultEP = cbo->intersection(geom0, geom1);
delete cbo; // check that result is a valid geometry after the reshift to orginal precision
if (! resultEP->isValid())
throw originalEx;
return resultEP;
} catch (GEOSException *ex2) {
throw originalEx;
}
}
/**
* Computes the set-theoretic union of two {@link Geometry}s, using enhanced precision->
* @param geom0 the first Geometry
* @param geom1 the second Geometry
* @return the Geometry representing the set-theoretic union of the input Geometries->
*/
Geometry* EnhancedPrecisionOp::Union(Geometry *geom0, Geometry *geom1){
GEOSException *originalEx;
try {
Geometry* result = geom0->Union(geom1);
return result;
}catch (GEOSException *ex) {
originalEx = ex;
}
/*
* If we are here, the original op encountered a precision problem
* (or some other problem)-> Retry the operation with
* enhanced precision to see if it succeeds
*/
try {
CommonBitsOp *cbo = new CommonBitsOp(true);
Geometry *resultEP = cbo->Union(geom0, geom1);
delete cbo; // check that result is a valid geometry after the reshift to orginal precision
if (! resultEP->isValid())
throw originalEx;
return resultEP;
} catch (GEOSException *ex2) {
throw originalEx;
}
}
/**
* Computes the set-theoretic difference of two {@link Geometry}s, using enhanced precision->
* @param geom0 the first Geometry
* @param geom1 the second Geometry
* @return the Geometry representing the set-theoretic difference of the input Geometries->
*/
Geometry* EnhancedPrecisionOp::difference(Geometry *geom0, Geometry *geom1){
GEOSException *originalEx;
try {
Geometry *result = geom0->difference(geom1);
return result;
} catch (GEOSException *ex) {
originalEx = ex;
}
/*
* If we are here, the original op encountered a precision problem
* (or some other problem)-> Retry the operation with
* enhanced precision to see if it succeeds
*/
try {
CommonBitsOp *cbo = new CommonBitsOp(true);
Geometry *resultEP = cbo->difference(geom0, geom1);
delete cbo; // check that result is a valid geometry after the reshift to orginal precision
if (! resultEP->isValid())
throw originalEx;
return resultEP;
} catch (GEOSException *ex2) {
throw originalEx;
}
}
/**
* Computes the set-theoretic symmetric difference of two {@link Geometry}s, using enhanced precision->
* @param geom0 the first Geometry
* @param geom1 the second Geometry
* @return the Geometry representing the set-theoretic symmetric difference of the input Geometries->
*/
Geometry* EnhancedPrecisionOp::symDifference(Geometry *geom0, Geometry *geom1){
GEOSException *originalEx;
try {
Geometry *result = geom0->symDifference(geom1);
return result;
} catch (GEOSException *ex) {
originalEx = ex;
}
/*
* If we are here, the original op encountered a precision problem
* (or some other problem)-> Retry the operation with
* enhanced precision to see if it succeeds
*/
try {
CommonBitsOp *cbo = new CommonBitsOp(true);
Geometry* resultEP = cbo->symDifference(geom0, geom1);
delete cbo; // check that result is a valid geometry after the reshift to orginal precision
if (! resultEP->isValid())
throw originalEx;
return resultEP;
} catch (GEOSException *ex2) {
throw originalEx;
}
}
/**
* Computes the buffer of a {@link Geometry}, using enhanced precision->
* This method should no longer be necessary, since the buffer algorithm
* now is highly robust->
*
* @param geom0 the first Geometry
* @param distance the buffer distance
* @return the Geometry representing the buffer of the input Geometry->
*/
Geometry* EnhancedPrecisionOp::buffer(Geometry *geom, double distance){
GEOSException *originalEx;
try {
Geometry *result = geom->buffer(distance);
return result;
} catch (GEOSException *ex) {
originalEx = ex;
}
/*
* If we are here, the original op encountered a precision problem
* (or some other problem)-> Retry the operation with
* enhanced precision to see if it succeeds
*/
try {
CommonBitsOp *cbo = new CommonBitsOp(true);
Geometry *resultEP = cbo->buffer(geom, distance);
delete cbo; // check that result is a valid geometry after the reshift to orginal precision
if (! resultEP->isValid())
throw originalEx;
return resultEP;
} catch (GEOSException *ex2) {
throw originalEx;
}
}
}
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