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/**********************************************************************
* $Id: GeometryTestFactory.cpp,v 1.12 2004/12/08 13:54:43 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 <math.h>
#include <geos/geom.h>
#include "bigtest.h"
#define PI 3.14159265358979
using namespace geos;
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 DefaultCoordinateSequence();
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(*(new Coordinate(x,y)));
}
for(i=0;i<nSide;i++) {
double x=maxx;
double y=miny+i*segLen;
pts->add(*(new Coordinate(x,y)));
}
for(i=0;i<nSide;i++) {
double x=maxx-i*segLen;
double y=maxy;
pts->add(*(new Coordinate(x,y)));
}
for(i=0;i<nSide;i++) {
double x=minx;
double y=maxy-i*segLen;
pts->add(*(new Coordinate(x,y)));
}
pts->add(*(new Coordinate(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 DefaultCoordinateSequence(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(*(new Coordinate(x,y)));
}
pts->add(*(new 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 DefaultCoordinateSequence();
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: GeometryTestFactory.cpp,v $
* 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 DefaultCoordinateSequenceFactory::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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