--- /dev/null
+bsplinecurve bspline_3d_np_c_r 2 3 0 3 1 1 2 3 0 0 0 2 1 1 1 1 1 0 0 1 0 0 0 2
+extsurf es_bspline_3d_np_c_r bspline_3d_np_c_r 0 0 1
+trim es_bspline_3d_np_c_r_tr es_bspline_3d_np_c_r 0 1 0 1
+trim es_bspline_3d_np_c_r_tr_tr es_bspline_3d_np_c_r_tr 0 .5 0 .5
+mkface result es_bspline_3d_np_c_r_tr_tr 0 .25 0 .25
+set MaxFTol 9.9999999999999995e-08
+set MaxETol 9.9999999999999995e-08
+set MaxVTol 9.9999999999999995e-08