/* private */
void
Centroid::addShell(const CoordinateSequence& pts)
{
size_t len = pts.size();
if (len > 0)
setBasePoint(pts[0]);
bool isPositiveArea = ! CGAlgorithms::isCCW(&pts);
for (size_t i = 0; i < len - 1; ++i) {
addTriangle(*areaBasePt, pts[i], pts[i+1], isPositiveArea);
}
addLineSegments(pts);
}
/*public*/
void
CentroidArea::add(const Geometry *geom)
{
if(const Polygon *poly=dynamic_cast<const Polygon*>(geom)) {
setBasePoint(poly->getExteriorRing()->getCoordinateN(0));
add(poly);
}
else if(const GeometryCollection *gc=dynamic_cast<const GeometryCollection*>(geom))
{
for(std::size_t i=0, n=gc->getNumGeometries(); i<n; ++i)
{
add(gc->getGeometryN(i));
}
}
}
/*public*/
void
CentroidArea::add(const CoordinateSequence *ring)
{
setBasePoint(ring->getAt(0));
addShell(ring);
}