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changeset 44:c435e83a8e70

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Fix Matrix.rotate_y
author Thibaut Girka <thib@sitedethib.com>
date Mon, 22 Aug 2011 09:10:36 +0200
parents 7195aaf95f6e
children e01e88b06a13
files pytouhou/utils/matrix.py
diffstat 1 files changed, 2 insertions(+), 3 deletions(-) [+]
line wrap: on
line diff
--- a/pytouhou/utils/matrix.py
+++ b/pytouhou/utils/matrix.py
@@ -47,12 +47,11 @@ class Matrix(object):
 
 
     def rotate_y(self, angle):
-        #TODO: check
         d1 = self.data
         cos_a = cos(angle)
         sin_a = sin(angle)
-        d1[0][:], d1[2][:] = ([cos_a * d1[0][i] - sin_a * d1[2][i] for i in range(4)],
-                              [sin_a * d1[0][i] + cos_a * d1[2][i] for i in range(4)])
+        d1[0][:], d1[2][:] = ([cos_a * d1[0][i] + sin_a * d1[2][i] for i in range(4)],
+                              [- sin_a * d1[0][i] + cos_a * d1[2][i] for i in range(4)])
 
 
     def rotate_z(self, angle):