Function point_line_distance

src/svgfill/src/arrange_polygons.cpp:994–1001

}

double point_line_distance(const DPoint& p, const DPoint& line_point, const DDir& line_dir) {
    auto u = unit(line_dir);
    auto delta = (p - line_point);
    if (u.squared_length() < 1.e-18) {
        return std::sqrt(delta.squared_length());
    }
    return std::abs(CGAL::determinant(u.x(), u.y(), delta.x(), delta.y()));
}

double angle_between_dirs_deg(const DDir& a, const DDir& b) {
    auto u = unit(a);