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/**********************************************************************
* $Id: GeometryTestFactory.cpp 1861 2006-10-12 15:33:40Z strk $
*
* 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 <cmath>
#include <geos/geom/GeometryFactory.h>
#include <geos/geom/CoordinateArraySequence.h>
#include <geos/geom/Coordinate.h>
#include "bigtest.h"
#define PI 3.14159265358979
using namespace geos::geom;
Polygon* GeometryTestFactory::createBox(GeometryFactory *fact,double minx,double miny,int nSide,double segLen) {
CoordinateSequence *pts=createBox(minx, miny, nSide, segLen);
return fact->createPolygon(fact->createLinearRing(pts),NULL);
}
CoordinateSequence* GeometryTestFactory::createBox(double minx, double miny,int nSide,double segLen) {
int i;
CoordinateSequence *pts=new CoordinateArraySequence();
double maxx=minx+nSide*segLen;
double maxy=miny+nSide*segLen;
for(i=0;i<nSide;i++) {
double x=minx+i*segLen;
double y=miny;
pts->add(Coordinate(x,y));
}
for(i=0;i<nSide;i++) {
double x=maxx;
double y=miny+i*segLen;
pts->add(Coordinate(x,y));
}
for(i=0;i<nSide;i++) {
double x=maxx-i*segLen;
double y=maxy;
pts->add(Coordinate(x,y));
}
for(i=0;i<nSide;i++) {
double x=minx;
double y=maxy-i*segLen;
pts->add(Coordinate(x,y));
}
pts->add(pts->getAt(0));
return pts;
}
/**
* Creates a circle
* @param x the centre x coord
* @param y the centre y coord
* @param size the size of the envelope of the star
* @param nPts the number of points in the star
*/
CoordinateSequence* GeometryTestFactory::createCircle(double basex,double basey,double size,int nPts) {
CoordinateSequence *pts=new CoordinateArraySequence(nPts+1);
double len=size/2.0;
for(int i=0;i<nPts;i++) {
double ang=i*(2*PI/nPts);
double x=len*cos(ang)+basex;
double y=len*sin(ang)+basey;
pts->add(Coordinate(x,y));
}
pts->add(Coordinate(pts->getAt(0)));
return pts;
}
Polygon* GeometryTestFactory::createCircle(GeometryFactory *fact,double basex,double basey,double size,int nPts) {
CoordinateSequence *pts=createCircle(basex, basey, size, nPts);
return fact->createPolygon(fact->createLinearRing(pts),NULL);
}
/**
* Creates a star from a "circular" sine wave
* @param basex the centre x coord
* @param basey the centre y coord
* @param size the size of the envelope of the star
* @param armLen the length of an arm of the star
* @param nArms the number of arms of the star
* @param nPts the number of points in the star
*/
CoordinateSequence* GeometryTestFactory::createSineStar(double basex,double basey,double size,double armLen,int nArms,int nPts) {
double armBaseLen=size/2-armLen;
if (armBaseLen<0) armBaseLen=0.5;
double angInc=2*PI/nArms;
int nArmPt=nPts/nArms;
if (nArmPt<5) nArmPt=5;
//int nPts2=nArmPt*nArms;
CoordinateSequence *pts=new CoordinateArraySequence();
double starAng=0.0;
for(int iArm=0;iArm<nArms;iArm++) {
for(int iArmPt=0;iArmPt<nArmPt;iArmPt++) {
double ang=iArmPt*(2*PI/nArmPt);
double len=armLen*(1-cos(ang)/2)+armBaseLen;
double x=len*cos(starAng+iArmPt*angInc/nArmPt)+basex;
double y=len*sin(starAng+iArmPt*angInc/nArmPt)+basey;
pts->add(*(new Coordinate(x,y)));
}
starAng+=angInc;
}
pts->add(*(new Coordinate(pts->getAt(0))));
return pts;
}
Polygon* GeometryTestFactory::createSineStar(GeometryFactory *fact,double basex,double basey,double size,double armLen,int nArms,int nPts){
CoordinateSequence *pts=createSineStar(basex, basey, size, armLen, nArms, nPts);
return fact->createPolygon(fact->createLinearRing(pts),NULL);
}
/**********************************************************************
* $Log$
* Revision 1.1 2006/01/31 19:07:35 strk
* - Renamed DefaultCoordinateSequence to CoordinateArraySequence.
* - Moved GetNumGeometries() and GetGeometryN() interfaces
* from GeometryCollection to Geometry class.
* - Added getAt(int pos, Coordinate &to) funtion to CoordinateSequence class.
* - Reworked automake scripts to produce a static lib for each subdir and
* then link all subsystem's libs togheter
* - Moved C-API in it's own top-level dir capi/
* - Moved source/bigtest and source/test to tests/bigtest and test/xmltester
* - Fixed PointLocator handling of LinearRings
* - Changed CoordinateArrayFilter to reduce memory copies
* - Changed UniqueCoordinateArrayFilter to reduce memory copies
* - Added CGAlgorithms::isPointInRing() version working with
* Coordinate::ConstVect type (faster!)
* - Ported JTS-1.7 version of ConvexHull with big attention to
* memory usage optimizations.
* - Improved XMLTester output and user interface
* - geos::geom::util namespace used for geom/util stuff
* - Improved memory use in geos::geom::util::PolygonExtractor
* - New ShortCircuitedGeometryVisitor class
* - New operation/predicate package
*
* Revision 1.13 2005/04/06 11:09:41 strk
* Applied patch from Jon Schlueter (math.h => cmath; ieeefp.h in "C" block)
*
* Revision 1.12 2004/12/08 13:54:43 strk
* gcc warnings checked and fixed, general cleanups.
*
* Revision 1.11 2004/07/19 10:35:23 strk
* bigtest.h moved to local dir
*
* Revision 1.10 2004/07/08 19:34:49 strk
* Mirrored JTS interface of CoordinateSequence, factory and
* default implementations.
* Added CoordinateArraySequenceFactory::instance() function.
*
* Revision 1.9 2004/07/02 13:28:26 strk
* Fixed all #include lines to reflect headers layout change.
* Added client application build tips in README.
*
* Revision 1.8 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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