const Vector &ballast_min = ballast_profile.get_min_coords();
const Vector &ballast_max = ballast_profile.get_max_coords();
float ballast_h = ballast_max.y-ballast_min.y;
const Vector &ballast_min = ballast_profile.get_min_coords();
const Vector &ballast_max = ballast_profile.get_max_coords();
float ballast_h = ballast_max.y-ballast_min.y;