• RGRL_AMOEBA : rgrl_est_spline.h
• RGRL_CONJUGATE_GRADIENT : rgrl_est_spline.h
• RGRL_LBFGS : rgrl_est_spline.h
• RGRL_LEVENBERG_MARQUARDT : rgrl_est_spline.h
• RGRL_NONE : rgrl_est_spline.h
• RGRL_POWELL : rgrl_est_spline.h