From 010fea7df893b94361b0cee608181a1c9085627c Mon Sep 17 00:00:00 2001
From: David Vierra <codewarrior@hawaii.rr.com>
Date: Thu, 8 Oct 2015 23:33:34 -1000
Subject: [PATCH] Fix calculation of transformed bounds not using inverse
 matrix

---
 src/mceditlib/transform.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/mceditlib/transform.py b/src/mceditlib/transform.py
index e8cf78b..3c34019 100644
--- a/src/mceditlib/transform.py
+++ b/src/mceditlib/transform.py
@@ -23,6 +23,8 @@ def boundsCorners(bounds):
     return list(corners)
 
 def transformBounds(bounds, matrix):
+    # matrix goes from dest to source; we need source to dest here, so get inverse
+    matrix = np.linalg.inv(matrix)
     corners = np.array(boundsCorners(bounds))
     corners = np.hstack([corners, ([1],)*8])
     corners = corners * matrix