bool
FlatEllipse::Intersect(const FlatLine &line, FlatPoint &i1, FlatPoint &i2) const
{
const fixed er = ab();
const fixed ier = ba();
FlatLine s_line = line;
s_line.sub(p);
s_line.rotate(theta.Reciprocal());
s_line.mul_y(er);
if (s_line.intersect_czero(a, i1, i2)) {
i1.MultiplyY(ier);
i1.Rotate(theta);
i1.Add(p);
i2.MultiplyY(ier);
i2.Rotate(theta);
i2.Add(p);
return true;
}
return false;
}
bool
FlatEllipse::Intersect(const FlatLine &line, FlatPoint &i1, FlatPoint &i2) const
{
const double er = ab();
const double ier = ba();
FlatLine s_line = line - p;
s_line.Rotate(theta.Reciprocal());
s_line.MultiplyY(er);
if (s_line.IntersectOriginCircle(a, i1, i2)) {
i1.MultiplyY(ier);
i1.Rotate(theta);
i1 += p;
i2.MultiplyY(ier);
i2.Rotate(theta);
i2 += p;
return true;
}
return false;
}