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proper definition of homomorph

This commit is contained in:
Martin Diehl 2019-04-18 17:04:00 +02:00
parent 1904ac211e
commit c4f56703a4
2 changed files with 5 additions and 4 deletions
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4
python/damask/orientation.py
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@ -61,7 +61,9 @@ class Rotation:
Rotation: Details needed (active/passive), rotation of (3,3,3,3)-matrix should be considered Rotation: Details needed (active/passive), rotation of (3,3,3,3)-matrix should be considered
""" """
if isinstance(other, Rotation): # rotate a rotation if isinstance(other, Rotation): # rotate a rotation
return self.__class__((self.quaternion * other.quaternion).homomorph()) qu = self.quaternion * other.quaternion
if qu.q < 0: qu.homomorph()
return self.__class__(qu)
elif isinstance(other, np.ndarray): elif isinstance(other, np.ndarray):
if other.shape == (3,): # rotate a single (3)-vector if other.shape == (3,): # rotate a single (3)-vector
( x, y, z) = self.quaternion.p ( x, y, z) = self.quaternion.p

5
python/damask/quaternion.py
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@ -201,9 +201,8 @@ class Quaternion:
def homomorph(self): def homomorph(self):
if self.q < 0.0: self.q = -self.q
self.q = -self.q self.p = -self.p
self.p = -self.p
return self return self
def homomorphed(self): def homomorphed(self):