def Calculate_dmdt(mAllCell, HeffBase):
global alphaDamping, gamFac, mu0
H = HeffBase
m = mAllCell
mXH = numerix.cross(m, H, axisa=0, axisb=0)
precisionTerm = numerix.transpose(mXH)
mXmXH = numerix.cross(m, precisionTerm, axisa=0, axisb=0)
dampingTerm = (alphaDamping) * numerix.transpose(mXmXH)
constant_factor = -(gamFac * mu0) / (1 + alphaDamping**2)
dmdt = (constant_factor) * (precisionTerm + dampingTerm)
return dmdt
def _calcFaceTangents(self):
faceVertexCoord = numerix.array(
numerix.take(self.vertexCoords, self.faceVertexIDs[0], axis=1))
tmp = self._faceCenters - faceVertexCoord
faceTangents1 = tmp / numerix.sqrtDot(tmp, tmp)
tmp = numerix.cross(faceTangents1, self.faceNormals, axis=0)
faceTangents2 = tmp / numerix.sqrtDot(tmp, tmp)
return faceTangents1, faceTangents2
def _calcFaceTangents(self):
faceVertexCoord = numerix.array(numerix.take(self.vertexCoords,
self.faceVertexIDs[0],
axis=1))
tmp = self.faceCenters - faceVertexCoord
self.faceTangents1 = tmp / numerix.sqrtDot(tmp, tmp)
tmp = numerix.cross(self.faceTangents1, self.faceNormals, axis=0)
self.faceTangents2 = tmp / numerix.sqrtDot(tmp, tmp)
def calculateFieldLikeTorque(mUnit, uAxis):
uAxisNorm = numerix.linalg.norm(uAxis)
uAxisUnit = uAxis / uAxisNorm
mNorm = numerix.linalg.norm(mUnit,axis=0)
mArray = mUnit / mNorm
uAxisArr = numerix.tile(uAxisUnit, (len(mUnit[0]), 1))
uAxisArr = numerix.transpose(uAxisArr)
m_x_u = numerix.cross(mArray, uAxisArr)
return numerix.transpose(m_x_u)
def _calcArea(self):
"""Calculate the area of the `Face`.
Area is the signed sum of the area of the triangles bounded by
each polygon edge and the origin.
"""
a = 0.0
p1 = self.vertices[0].getCoordinates().copy()
for vertex in self.vertices[2:-1]:
p2 = vertex.getCoordinates().copy()
a += numerix.cross(p1, p2)
p1 = p2
return abs(a / 2.0)
def _rightHandOrientation(self):
faceVertexIDs = MA.filled(self.faceVertexIDs, 0)
faceVertexCoords = numerix.take(self.vertexCoords, faceVertexIDs, axis=1)
t1 = faceVertexCoords[:,1,:] - faceVertexCoords[:,0,:]
t2 = faceVertexCoords[:,2,:] - faceVertexCoords[:,1,:]
norm = numerix.cross(t1, t2, axis=0)
## reordering norm's internal memory for inlining
norm = norm.copy()
norm = norm / numerix.sqrtDot(norm, norm)
faceNormals = -norm
return 1 - 2 * (numerix.dot(faceNormals, self.cellDistanceVectors) < 0)
def _calcFaceAreas(self):
faceVertexIDs = MA.filled(self.faceVertexIDs, -1)
substitute = numerix.repeat(faceVertexIDs[numerix.newaxis, 0],
faceVertexIDs.shape[0], axis=0)
faceVertexIDs = numerix.where(MA.getmaskarray(self.faceVertexIDs), substitute, faceVertexIDs)
faceVertexCoords = numerix.take(self.vertexCoords, faceVertexIDs, axis=1)
faceOrigins = numerix.repeat(faceVertexCoords[:,0], faceVertexIDs.shape[0], axis=0)
faceOrigins = numerix.reshape(faceOrigins, MA.shape(faceVertexCoords))
faceVertexCoords = faceVertexCoords - faceOrigins
left = range(faceVertexIDs.shape[0])
right = left[1:] + [left[0]]
cross = numerix.sum(numerix.cross(faceVertexCoords, numerix.take(faceVertexCoords, right, 1), axis=0), 1)
self.faceAreas = numerix.sqrtDot(cross, cross) / 2.
def _calcFaceAreas(self):
faceVertexIDs = MA.filled(self.faceVertexIDs, -1)
substitute = numerix.repeat(faceVertexIDs[numerix.newaxis, 0],
faceVertexIDs.shape[0], axis=0)
faceVertexIDs = numerix.where(MA.getmaskarray(self.faceVertexIDs),
substitute, faceVertexIDs)
faceVertexCoords = numerix.take(self.vertexCoords, faceVertexIDs, axis=1)
faceOrigins = numerix.repeat(faceVertexCoords[:,0], faceVertexIDs.shape[0], axis=0)
faceOrigins = numerix.reshape(faceOrigins, MA.shape(faceVertexCoords))
faceVertexCoords = faceVertexCoords - faceOrigins
left = range(faceVertexIDs.shape[0])
right = left[1:] + [left[0]]
cross = numerix.sum(numerix.cross(faceVertexCoords,
numerix.take(faceVertexCoords, right, 1),
axis=0),
1)
return numerix.sqrtDot(cross, cross) / 2.
def calculateDampingTerm(mUnit, Heff):
Precession = calculatePrecessionTerm(mUnit, Heff)
DampingBase = numerix.cross(mUnit, Precession, axisa=0, axisb=0)
return numerix.transpose(DampingBase)
def calculatePrecessionTerm(mUnit, Heff):
PrecessionBase = numerix.cross(mUnit, Heff, axisa=0, axisb=0)
return numerix.transpose(PrecessionBase)
def calculateDampingLikeTorque(mUnit, uAxis):
m_x_u = calculateFieldLikeTorque(mUnit, uAxis)
mNorm = numerix.linalg.norm(mUnit,axis=0)
mArray = mUnit / mNorm
m_x_m_x_u = numerix.cross(mArray, m_x_u)
return numerix.transpose(m_x_m_x_u)
