From 44d87a972c694371462378672429f2acc24249b2 Mon Sep 17 00:00:00 2001
From: Michael Mugnai <michael.mugnai@gmail.com>
Date: Tue, 2 Jun 2020 19:38:43 +0200
Subject: [PATCH] curve fitting: take u_k as optional argument

---
 geomdl/fitting.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/geomdl/fitting.py b/geomdl/fitting.py
index 86b3f3d9..5878a70e 100644
--- a/geomdl/fitting.py
+++ b/geomdl/fitting.py
@@ -34,8 +34,10 @@ def interpolate_curve(points, degree, **kwargs):
     # Number of control points
     num_points = len(points)
 
-    # Get uk
-    uk = compute_params_curve(points, use_centripetal)
+    # Get uk as argument or compute it
+    uk = kwargs.get('uk', None)
+    if uk is None:
+        uk = compute_params_curve(points, use_centripetal)
 
     # Compute knot vector
     kv = compute_knot_vector(degree, num_points, uk)
@@ -49,6 +51,7 @@ def interpolate_curve(points, degree, **kwargs):
     curve.degree = degree
     curve.ctrlpts = ctrlpts
     curve.knotvector = kv
+    curve.uk = uk
 
     return curve