C++ (Cpp) e_l Examples

Example #1

File: FlatEllipse.cpp Project: macsux/XCSoar

bool
FlatEllipse::intersect_extended(const FlatPoint &pe, FlatPoint &i1,
                                FlatPoint &i2) const
{
  const FlatLine l_f1p(f1, pe);
  const FlatLine l_pf2(pe, f2);
  const Angle ang = l_f1p.angle();

  const fixed d = l_pf2.d() + max(a, b); // max line length

  fixed can, san;
  ang.sin_cos(san, can);

  FlatLine e_l(pe, FlatPoint(pe.x + d * can, pe.y + d * san));
  // e_l is the line extended from p in direction of f1-p 
  
  return intersect(e_l, i1, i2);
}

Example #2

File: FlatEllipse.cpp Project: Adrien81/XCSoar

bool
FlatEllipse::IntersectExtended(const FlatPoint &pe, FlatPoint &i1,
                                FlatPoint &i2) const
{
  const FlatLine l_f1p(f1, pe);
  const FlatLine l_pf2(pe, f2);
  const Angle ang = l_f1p.angle();

  const fixed d = l_pf2.d() + std::max(a, b); // max line length

  const auto sc = ang.SinCos();
  fixed san = sc.first, can = sc.second;

  FlatLine e_l(pe, FlatPoint(pe.x + d * can, pe.y + d * san));
  // e_l is the line extended from p in direction of f1-p 
  
  return Intersect(e_l, i1, i2);
}