Method slope

common/map_sdk/map_import/src/OpenDriveStruct.cpp:245–245

double Polynomial3D::value(const double& dis) const { return a + b * dis + c * dis * dis + d * dis * dis * dis; }

double Polynomial3D::slope(const double& dis) const { return b + 2 * c * dis + 3 * d * dis * dis; }

void Polynomial3D::getParam(double& _a, double& _b, double& _c, double& _d, double& _s) const {
  _s = s;