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DAMASK_EICMD
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making sure that roots are taken from strictly non-negative summation results

This commit is contained in:
Philip Eisenlohr 2018-12-07 10:34:45 -05:00
parent a6d4c73de0
commit d7f505f24e
1 changed files with 11 additions and 9 deletions
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20
lib/damask/orientation.py
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@ -311,10 +311,12 @@ class Quaternion:
randomSeed = int(binascii.hexlify(os.urandom(4)),16)
np.random.seed(randomSeed)
r = np.random.random(3)
w = math.cos(2.0*math.pi*r[0])*math.sqrt(r[2])
x = math.sin(2.0*math.pi*r[1])*math.sqrt(1.0-r[2])
y = math.cos(2.0*math.pi*r[1])*math.sqrt(1.0-r[2])
z = math.sin(2.0*math.pi*r[0])*math.sqrt(r[2])
A = math.sqrt(max(0.0,r[2]))
B = math.sqrt(max(0.0,1.0-r[2]))
w = math.cos(2.0*math.pi*r[0])*A
x = math.sin(2.0*math.pi*r[1])*B
y = math.cos(2.0*math.pi*r[1])*B
z = math.sin(2.0*math.pi*r[0])*A
return cls(quat=[w,x,y,z])
@ -372,10 +374,10 @@ class Quaternion:
# Rowenhorst_etal2015 MSMSE: value of P is selected as -1
P = -1.0
w = 0.5*math.sqrt(1.+m[0,0]+m[1,1]+m[2,2])
x = P*0.5*math.sqrt(1.+m[0,0]-m[1,1]-m[2,2])
y = P*0.5*math.sqrt(1.-m[0,0]+m[1,1]-m[2,2])
z = P*0.5*math.sqrt(1.-m[0,0]-m[1,1]+m[2,2])
w = 0.5*math.sqrt(max(0.0,1.0+m[0,0]+m[1,1]+m[2,2]))
x = P*0.5*math.sqrt(max(0.0,1.0+m[0,0]-m[1,1]-m[2,2]))
y = P*0.5*math.sqrt(max(0.0,1.0-m[0,0]+m[1,1]-m[2,2]))
z = P*0.5*math.sqrt(max(0.0,1.0-m[0,0]-m[1,1]+m[2,2]))
x *= -1 if m[2,1] < m[1,2] else 1
y *= -1 if m[0,2] < m[2,0] else 1
@ -668,7 +670,7 @@ class Symmetry:
if color: # have to return color array
if inSST:
rgb = np.power(theComponents/np.linalg.norm(theComponents),0.5) # smoothen color ramps
rgb = np.minimum(np.ones(3,dtype=float),rgb) # limit to maximum intensity
rgb = np.minimum(np.ones(3,dtype=float),rgb) # limit to maximum intensity
rgb /= max(rgb) # normalize to (HS)V = 1
else:
rgb = np.zeros(3,dtype=float)