def __init__(self,
center,
normal,
radius,
height,
fields=None,
ds=None,
field_parameters=None,
data_source=None):
validate_center(center)
validate_3d_array(normal)
validate_float(radius)
validate_float(height)
validate_iterable(fields)
validate_object(ds, Dataset)
validate_object(field_parameters, dict)
validate_object(data_source, YTSelectionContainer)
YTSelectionContainer3D.__init__(self, center, ds, field_parameters,
data_source)
self._norm_vec = np.array(normal) / np.sqrt(np.dot(normal, normal))
self.set_field_parameter("normal", self._norm_vec)
self.set_field_parameter("center", self.center)
self.height = fix_length(height, self.ds)
self.radius = fix_length(radius, self.ds)
self._d = -1.0 * np.dot(self._norm_vec, self.center)
def __init__(self,
axis,
coords,
ds=None,
field_parameters=None,
data_source=None):
validate_axis(ds, axis)
validate_iterable(coords)
for c in coords:
validate_float(c)
validate_object(ds, Dataset)
validate_object(field_parameters, dict)
validate_object(data_source, YTSelectionContainer)
super(YTOrthoRay, self).__init__(ds, field_parameters, data_source)
self.axis = fix_axis(axis, self.ds)
xax = self.ds.coordinates.x_axis[self.axis]
yax = self.ds.coordinates.y_axis[self.axis]
self.px_ax = xax
self.py_ax = yax
# Even though we may not be using x,y,z we use them here.
self.px_dx = 'd%s' % ('xyz'[self.px_ax])
self.py_dx = 'd%s' % ('xyz'[self.py_ax])
# Convert coordinates to code length.
if isinstance(coords[0], YTQuantity):
self.px = self.ds.quan(coords[0]).to("code_length")
else:
self.px = self.ds.quan(coords[0], "code_length")
if isinstance(coords[1], YTQuantity):
self.py = self.ds.quan(coords[1]).to("code_length")
else:
self.py = self.ds.quan(coords[1], "code_length")
self.sort_by = 'xyz'[self.axis]
def __init__(
self, axis, coord, center=None, ds=None, field_parameters=None, data_source=None
):
validate_axis(ds, axis)
validate_float(coord)
# center is an optional parameter
if center is not None:
validate_center(center)
validate_object(ds, Dataset)
validate_object(field_parameters, dict)
validate_object(data_source, YTSelectionContainer)
YTSelectionContainer2D.__init__(self, axis, ds, field_parameters, data_source)
self._set_center(center)
self.coord = coord
def __init__(self, center, radius, ds=None,
field_parameters=None, data_source=None):
validate_center(center)
validate_float(radius)
validate_object(ds, Dataset)
validate_object(field_parameters, dict)
validate_object(data_source, YTSelectionContainer)
super(YTSphere, self).__init__(center, ds,
field_parameters, data_source)
# Unpack the radius, if necessary
radius = fix_length(radius, self.ds)
if radius < self.index.get_smallest_dx():
raise YTSphereTooSmall(ds, radius.in_units("code_length"),
self.index.get_smallest_dx().in_units("code_length"))
self.set_field_parameter('radius', radius)
self.set_field_parameter("center", self.center)
self.radius = radius
def __init__(self, center, A, B, C, e0, tilt, fields=None,
ds=None, field_parameters=None, data_source=None):
validate_center(center)
validate_float(A)
validate_float(B)
validate_float(C)
validate_3d_array(e0)
validate_float(tilt)
validate_iterable(fields)
validate_object(ds, Dataset)
validate_object(field_parameters, dict)
validate_object(data_source, YTSelectionContainer)
YTSelectionContainer3D.__init__(self, center, ds,
field_parameters, data_source)
# make sure the magnitudes of semi-major axes are in order
if A<B or B<C:
raise YTEllipsoidOrdering(ds, A, B, C)
# make sure the smallest side is not smaller than dx
self._A = self.ds.quan(A, 'code_length')
self._B = self.ds.quan(B, 'code_length')
self._C = self.ds.quan(C, 'code_length')
if self._C < self.index.get_smallest_dx():
raise YTSphereTooSmall(self.ds, self._C, self.index.get_smallest_dx())
self._e0 = e0 = e0 / (e0**2.0).sum()**0.5
self._tilt = tilt
# find the t1 angle needed to rotate about z axis to align e0 to x
t1 = np.arctan(e0[1] / e0[0])
# rotate e0 by -t1
RZ = get_rotation_matrix(t1, (0,0,1)).transpose()
r1 = (e0 * RZ).sum(axis = 1)
# find the t2 angle needed to rotate about y axis to align e0 to x
t2 = np.arctan(-r1[2] / r1[0])
"""
calculate the original e1
given the tilt about the x axis when e0 was aligned
to x after t1, t2 rotations about z, y
"""
RX = get_rotation_matrix(-tilt, (1, 0, 0)).transpose()
RY = get_rotation_matrix(-t2, (0, 1, 0)).transpose()
RZ = get_rotation_matrix(-t1, (0, 0, 1)).transpose()
e1 = ((0, 1, 0) * RX).sum(axis=1)
e1 = (e1 * RY).sum(axis=1)
e1 = (e1 * RZ).sum(axis=1)
e2 = np.cross(e0, e1)
self._e1 = e1
self._e2 = e2
self.set_field_parameter('A', A)
self.set_field_parameter('B', B)
self.set_field_parameter('C', C)
self.set_field_parameter('e0', e0)
self.set_field_parameter('e1', e1)
self.set_field_parameter('e2', e2)
