geom::anonymous_namespace{openRectChannel2D.cpp} Namespace Reference

Functions
void	validateParams (double x0, double y0, double x1, double y1, double t)
double	distPointToSegment2D (const util::Point &p, const util::Point &a, const util::Point &b)

Function Documentation

distPointToSegment2D()

double geom::anonymous_namespace{openRectChannel2D.cpp}::distPointToSegment2D	(	const util::Point &	p,
		const util::Point &	a,
		const util::Point &	b
	)

Definition at line 35 of file openRectChannel2D.cpp.

                                                                                        {
  const util::Point ab = b - a;
  const util::Point ap = p - a;
  const double L2 = ab * ab;
  if (L2 < 1.0e-30)
    return ap.length();
  double s = (ap * ab) / L2;
  s = std::max(0., std::min(1., s));
  const util::Point proj = a + s * ab;
  return (p - proj).length();
}

References distPointToSegment2D(), and util::Point::length().

Referenced by distPointToSegment2D().

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validateParams()

void geom::anonymous_namespace{openRectChannel2D.cpp}::validateParams	(	double	x0,
		double	y0,
		double	x1,
		double	y1,
		double	t
	)

Definition at line 25 of file openRectChannel2D.cpp.

                                                                          {
  constexpr double eps = 1.0e-12;
  if (!(x1 > x0 + eps && y1 > y0 + eps && t > eps))
    throw std::runtime_error(
        "OpenRectChannel2D: require x0 < x1, y0 < y1, t > 0.");
  if (!(x1 - x0 > 2. * t + eps && y1 - y0 > 2. * t + eps))
    throw std::runtime_error(
        "OpenRectChannel2D: require x1-x0 > 2t and y1-y0 > 2t so the U-channel exists.");
}