GeometryConstructors.cpp

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// Examples
#include "GeometryExamples.h"

#include <terralib_buildconfig.h>

te::gm::Point* createPoint(const double& x, const double& y)
{
  te::gm::Point* p = new te::gm::Point(x, y);
  return p;
}

te::gm::Point* createPointZ(const double& x, const double& y, const double& z)
{
  te::gm::Point* p = new te::gm::Point(0, te::gm::PointZType);
  p->setX(x);
  p->setY(y);
  p->setZ(z);
  return p;
}

te::gm::LineString* createLineString(const double& xi, const double& yi,
                                     const double& xf, const double& yf)
{
  te::gm::LineString* l = new te::gm::LineString(2, te::gm::LineStringType);
  l->setPoint(0, xi, yi);
  l->setPoint(1, xf, yf);
  return l;
}

te::gm::LinearRing* createSquare(const double& xc, const double& yc, const double& size)
{
  te::gm::LinearRing* s = new te::gm::LinearRing(5, te::gm::LineStringType);
  double halfSize = size * 0.5;
  s->setPoint(0, xc - halfSize, yc - halfSize); // lower left 
  s->setPoint(1, xc - halfSize, yc + halfSize); // upper left
  s->setPoint(2, xc + halfSize, yc + halfSize); // upper rigth
  s->setPoint(3, xc + halfSize, yc - halfSize); // lower rigth
  s->setPoint(4, xc - halfSize, yc - halfSize); // closing
  return s;
}

te::gm::Polygon* createPolygon()
{
  te::gm::Polygon* p = new te::gm::Polygon(0, te::gm::PolygonType);
  p->push_back(createSquare(5, 5, 10));
  return p;
}

te::gm::Polygon* createPolygonWithHole()
{
  te::gm::Polygon* p = new te::gm::Polygon(0, te::gm::PolygonType);
  p->push_back(createSquare(5, 5, 10)); // external square
  p->push_back(createSquare(5, 5, 5));  // internal square (the hole!)
  return p;
}

te::gm::GeometryCollection* createGeometryCollection()
{
  te::gm::GeometryCollection* gColl = new te::gm::GeometryCollection(0, te::gm::GeometryCollectionType);  
  gColl->add(createPoint(0.0, 0.0));
  gColl->add(createLineString(0.0, 0.0, 10.0, 10.0));
  gColl->add(createLineString(0.0, 10.0, 10.0, 0.0));
  gColl->add(createPolygon());
  gColl->add(createPolygonWithHole());
  return gColl;
}