From e5343de2b8f214f362450b077301035ec9193c7c Mon Sep 17 00:00:00 2001
From: Martin Vonk <vonk.mart@gmail.com>
Date: Tue, 6 Dec 2022 19:43:06 +0100
Subject: [PATCH] Update utils.py

---
 src/vs2dpy/utils.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/vs2dpy/utils.py b/src/vs2dpy/utils.py
index 011db7a..55a7374 100644
--- a/src/vs2dpy/utils.py
+++ b/src/vs2dpy/utils.py
@@ -162,8 +162,8 @@ def cosby(
         k10 = 0.600
         k11 = 0.640
         k12 = 1.260
-        c = c / 100
-        sp = sp / 100
+        c = self.c / 100
+        sp = self.sp / 100
         b = k01 + k02 * c - k03 * sp
         theta_s = k04 - k05 * c - k06 * sp
         psi_s = 0.01 * 10 ** (k07 - k08 * c - k09 * sp)