From c5bf2aadbbe15e4f7b33a25460d12fea52482bf5 Mon Sep 17 00:00:00 2001
From: Emyr Thomas <emyr.thomas@gmail.com>
Date: Thu, 21 Jul 2022 17:10:00 +0100
Subject: [PATCH] Fix map image positions to prevent out of bounds error when
 using pyvips mapim

---
 src/kubi/kubi.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/kubi/kubi.py b/src/kubi/kubi.py
index 6a582bf..4cd3e99 100644
--- a/src/kubi/kubi.py
+++ b/src/kubi/kubi.py
@@ -61,7 +61,9 @@ def kubi(args):
 
         ### TODO replace numpy with vips
 
-        ls = np.linspace(-1, 1, size, dtype="f4", endpoint=False)
+        ls, step = np.linspace(-1, 1, size, dtype="f4", endpoint=False, retstep=True)
+        view = ls.reshape(1, size)
+        view += step/2
     
         if args.transform == "eac": # C.Brown (2017): Bringing pixels front and center in VR video
             ls = np.tan(ls / (4 / pi))
@@ -75,7 +77,7 @@ def kubi(args):
         x1 = np.arctan2(xv, yv)
         y1 = np.arctan(np.hypot(yv,xv))
 
-        ls = xv = yv = None
+        ls = view = xv = yv = None
 
         piot = pi/2