/*public*/
double
HCoordinate::getY() const
{
double a = y/w;
if ( !FINITE(a) ) {
throw NotRepresentableException();
}
return a;
}
/*public*/
double
HCoordinate::getY() const
{
double a = y / w;
if(!std::isfinite(a)) {
throw NotRepresentableException();
}
return a;
}
/*public static*/
void
HCoordinate::intersection(const Coordinate &p1, const Coordinate &p2,
const Coordinate &q1, const Coordinate &q2, Coordinate &ret)
{
#if GEOS_DEBUG
cerr << __FUNCTION__ << ":" << endl
<< setprecision(20)
<< " p1: " << p1 << endl
<< " p2: " << p2 << endl
<< " q1: " << q1 << endl
<< " q2: " << q2 << endl;
#endif
// unrolled computation
double px = p1.y - p2.y;
double py = p2.x - p1.x;
double pw = p1.x * p2.y - p2.x * p1.y;
double qx = q1.y - q2.y;
double qy = q2.x - q1.x;
double qw = q1.x * q2.y - q2.x * q1.y;
double x = py * qw - qy * pw;
double y = qx * pw - px * qw;
double w = px * qy - qx * py;
double xInt = x/w;
double yInt = y/w;
if ( (!FINITE(xInt)) || (!FINITE(yInt)) )
{
throw NotRepresentableException();
}
ret = Coordinate(xInt, yInt);
}