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Fixed bug in functions.invertQTransform -- incorrectly checked for scipy.weave instead of scipy.linalg

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Luke Campagnola 2012-10-10 15:10:04 -04:00
parent 1d05656a73
commit a011b34509
1 changed files with 5 additions and 4 deletions
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9
functions.py
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@ -1376,10 +1376,11 @@ def invertQTransform(tr):
bugs in that method. (specifically, Qt has floating-point precision issues bugs in that method. (specifically, Qt has floating-point precision issues
when determining whether a matrix is invertible) when determining whether a matrix is invertible)
""" """
if not USE_WEAVE: if not HAVE_SCIPY:
raise Exception("This function depends on scipy.weave library, but it does not appear to be usable.") inv = tr.inverted()
if inv[1] is False:
#return tr.inverted()[0] raise Exception("Transform is not invertible.")
return inv[0]
arr = np.array([[tr.m11(), tr.m12(), tr.m13()], [tr.m21(), tr.m22(), tr.m23()], [tr.m31(), tr.m32(), tr.m33()]]) arr = np.array([[tr.m11(), tr.m12(), tr.m13()], [tr.m21(), tr.m22(), tr.m23()], [tr.m31(), tr.m32(), tr.m33()]])
inv = scipy.linalg.inv(arr) inv = scipy.linalg.inv(arr)
return QtGui.QTransform(inv[0,0], inv[0,1], inv[0,2], inv[1,0], inv[1,1], inv[1,2], inv[2,0], inv[2,1]) return QtGui.QTransform(inv[0,0], inv[0,1], inv[0,2], inv[1,0], inv[1,1], inv[1,2], inv[2,0], inv[2,1])