void TrackType3D::build_part(const TrackPart &part, const Profile &profile, const Point &offset, GL::MeshBuilder &bld, unsigned &base_index)
{
float plen = part.get_length();
void TrackType3D::build_part(const TrackPart &part, const Profile &profile, const Point &offset, GL::MeshBuilder &bld, unsigned &base_index)
{
float plen = part.get_length();