def beach(fm, linewidth=2, facecolor='b', bgcolor='w', edgecolor='k',
alpha=1.0, xy=(0, 0), width=200, size=100, nofill=False,
zorder=100, mopad_basis='USE', axes=None):
"""
Return a beach ball as a collection which can be connected to an
current matplotlib axes instance (ax.add_collection). Based on MoPaD.
S1, D1, and R1, the strike, dip and rake of one of the focal planes, can
be vectors of multiple focal mechanisms.
:param fm: Focal mechanism that is either number of mechanisms (NM) by 3
(strike, dip, and rake) or NM x 6 (M11, M22, M33, M12, M13, M23 - the
six independent components of the moment tensor, where the coordinate
system is 1,2,3 = Up,South,East which equals r,theta,phi -
Harvard/Global CMT convention). The relation to Aki and Richards
x,y,z equals North,East,Down convention is as follows: Mrr=Mzz,
Mtt=Mxx, Mpp=Myy, Mrt=Mxz, Mrp=-Myz, Mtp=-Mxy.
The strike is of the first plane, clockwise relative to north.
The dip is of the first plane, defined clockwise and perpendicular to
strike, relative to horizontal such that 0 is horizontal and 90 is
vertical. The rake is of the first focal plane solution. 90 moves the
hanging wall up-dip (thrust), 0 moves it in the strike direction
(left-lateral), -90 moves it down-dip (normal), and 180 moves it
opposite to strike (right-lateral).
:param facecolor: Color to use for quadrants of tension; can be a string,
e.g. ``'r'``, ``'b'`` or three component color vector, [R G B].
Defaults to ``'b'`` (blue).
:param bgcolor: The background color. Defaults to ``'w'`` (white).
:param edgecolor: Color of the edges. Defaults to ``'k'`` (black).
:param alpha: The alpha level of the beach ball. Defaults to ``1.0``
(opaque).
:param xy: Origin position of the beach ball as tuple. Defaults to
``(0, 0)``.
:type width: int
:param width: Symbol size of beach ball. Defaults to ``200``.
:param size: Controls the number of interpolation points for the
curves. Minimum is automatically set to ``100``.
:param nofill: Do not fill the beach ball, but only plot the planes.
:param zorder: Set zorder. Artists with lower zorder values are drawn
first.
:param mopad_basis: The basis system. Defaults to ``'USE'``. See the
`Supported Basis Systems`_ section below for a full list of supported
systems.
:type axes: :class:`matplotlib.axes.Axes`
:param axes: Used to make beach balls circular on non-scaled axes. Also
maintains the aspect ratio when resizing the figure. Will not add
the returned collection to the axes instance.
.. rubric:: _`Supported Basis Systems`
========= =================== =============================================
Short Basis vectors Usage
========= =================== =============================================
``'NED'`` North, East, Down Jost and Herrmann 1989
``'USE'`` Up, South, East Global CMT Catalog, Larson et al. 2010
``'XYZ'`` East, North, Up General formulation, Jost and Herrmann 1989
``'RT'`` Radial, Transverse, psmeca (GMT), Wessel and Smith 1999
Tangential
``'NWU'`` North, West, Up Stein and Wysession 2003
========= =================== =============================================
"""
# initialize beachball
mt = mopad_MomentTensor(fm, system=mopad_basis)
bb = mopad_BeachBall(mt, npoints=size)
bb._setup_BB(unit_circle=False)
# extract the coordinates and colors of the lines
radius = width / 2.0
neg_nodalline = bb._nodalline_negative_final_US
pos_nodalline = bb._nodalline_positive_final_US
tension_colour = facecolor
pressure_colour = bgcolor
if nofill:
tension_colour = 'none'
pressure_colour = 'none'
# based on mopads _setup_plot_US() function
# collect patches for the selection
coll = [None, None, None]
coll[0] = patches.Circle(xy, radius=radius)
coll[1] = xy2patch(neg_nodalline[0, :], neg_nodalline[1, :], radius, xy)
coll[2] = xy2patch(pos_nodalline[0, :], pos_nodalline[1, :], radius, xy)
# set the color of the three parts
fc = [None, None, None]
if bb._plot_clr_order > 0:
fc[0] = pressure_colour
fc[1] = tension_colour
fc[2] = tension_colour
if bb._plot_curve_in_curve != 0:
fc[0] = tension_colour
if bb._plot_curve_in_curve < 1:
fc[1] = pressure_colour
fc[2] = tension_colour
else:
coll = [coll[i] for i in (0, 2, 1)]
fc[1] = pressure_colour
fc[2] = tension_colour
else:
fc[0] = tension_colour
fc[1] = pressure_colour
fc[2] = pressure_colour
if bb._plot_curve_in_curve != 0:
fc[0] = pressure_colour
if bb._plot_curve_in_curve < 1:
fc[1] = tension_colour
fc[2] = pressure_colour
else:
coll = [coll[i] for i in (0, 2, 1)]
fc[1] = tension_colour
fc[2] = pressure_colour
if bb._pure_isotropic:
if abs(np.trace(bb._M)) > epsilon:
# use the circle as the most upper layer
coll = [coll[0]]
if bb._plot_clr_order < 0:
fc = [tension_colour]
else:
fc = [pressure_colour]
# transform the patches to a path collection and set
# the appropriate attributes
collection = mpl_collections.PatchCollection(coll, match_original=False)
collection.set_facecolors(fc)
# Use the given axes to maintain the aspect ratio of beachballs on figure
# resize.
if axes is not None:
# This is what holds the aspect ratio (but breaks the positioning)
collection.set_transform(transforms.IdentityTransform())
# Next is a dirty hack to fix the positioning:
# 1. Need to bring the all patches to the origin (0, 0).
for p in collection._paths:
p.vertices -= xy
# 2. Then use the offset property of the collection to position the
# patches
collection.set_offsets(xy)
collection._transOffset = axes.transData
collection.set_edgecolors(edgecolor)
collection.set_alpha(alpha)
collection.set_linewidth(linewidth)
collection.set_zorder(zorder)
return collection
def beachball(fm, linewidth=2, facecolor='b', bgcolor='w', edgecolor='k',
alpha=1.0, xy=(0, 0), width=200, size=100, nofill=False,
zorder=100, mopad_basis='USE', outfile=None, format=None,
fig=None):
"""
Draws a beach ball diagram of an earthquake focal mechanism. Based on
MoPaD.
S1, D1, and R1, the strike, dip and rake of one of the focal planes, can
be vectors of multiple focal mechanisms.
:param fm: Focal mechanism that is either number of mechanisms (NM) by 3
(strike, dip, and rake) or NM x 6 (M11, M22, M33, M12, M13, M23 - the
six independent components of the moment tensor, where the coordinate
system is 1,2,3 = Up,South,East which equals r,theta,phi). The strike
is of the first plane, clockwise relative to north.
The dip is of the first plane, defined clockwise and perpendicular to
strike, relative to horizontal such that 0 is horizontal and 90 is
vertical. The rake is of the first focal plane solution. 90 moves the
hanging wall up-dip (thrust), 0 moves it in the strike direction
(left-lateral), -90 moves it down-dip (normal), and 180 moves it
opposite to strike (right-lateral).
:param facecolor: Color to use for quadrants of tension; can be a string,
e.g. ``'r'``, ``'b'`` or three component color vector, [R G B].
Defaults to ``'b'`` (blue).
:param bgcolor: The background color. Defaults to ``'w'`` (white).
:param edgecolor: Color of the edges. Defaults to ``'k'`` (black).
:param alpha: The alpha level of the beach ball. Defaults to ``1.0``
(opaque).
:param xy: Origin position of the beach ball as tuple. Defaults to
``(0, 0)``.
:type width: int
:param width: Symbol size of beach ball. Defaults to ``200``.
:param size: Controls the number of interpolation points for the
curves. Minimum is automatically set to ``100``.
:param nofill: Do not fill the beach ball, but only plot the planes.
:param zorder: Set zorder. Artists with lower zorder values are drawn
first.
:param mopad_basis: The basis system. Defaults to ``'USE'``. See the
`Supported Basis Systems`_ section below for a full list of supported
systems.
:param outfile: Output file string. Also used to automatically
determine the output format. Supported file formats depend on your
matplotlib backend. Most backends support png, pdf, ps, eps and
svg. Defaults to ``None``.
:param format: Format of the graph picture. If no format is given the
outfile parameter will be used to try to automatically determine
the output format. If no format is found it defaults to png output.
If no outfile is specified but a format is, than a binary
imagestring will be returned.
Defaults to ``None``.
:param fig: Give an existing figure instance to plot into. New Figure if
set to ``None``.
.. rubric:: _`Supported Basis Systems`
========= =================== =============================================
Short Basis vectors Usage
========= =================== =============================================
``'NED'`` North, East, Down Jost and Herrmann 1989
``'USE'`` Up, South, East Global CMT Catalog, Larson et al. 2010
``'XYZ'`` East, North, Up General formulation, Jost and Herrmann 1989
``'RT'`` Radial, Transverse, psmeca (GMT), Wessel and Smith 1999
Tangential
``'NWU'`` North, West, Up Stein and Wysession 2003
========= =================== =============================================
.. rubric:: Examples
(1) Using basis system ``'NED'``.
>>> from obspy.imaging.mopad_wrapper import beachball
>>> mt = [1, 2, 3, -4, -5, -10]
>>> beachball(mt, mopad_basis='NED') #doctest: +SKIP
.. plot::
from obspy.imaging.mopad_wrapper import beachball
mt = [1, 2, 3, -4, -5, -10]
beachball(mt, mopad_basis='NED')
"""
mopad_kwargs = {}
loc = locals()
# map to kwargs used in mopad
for key in KWARG_MAP:
value = loc[key]
for mopad_key in KWARG_MAP[key]:
mopad_kwargs[mopad_key] = value
# convert from points to size in cm
for key in ['plot_aux_plot_size', 'plot_size']:
# 100.0 is matplotlib's default DPI for savefig
mopad_kwargs[key] = mopad_kwargs[key] / 100.0 * 2.54
# use nofill kwarg
mt = mopad_MomentTensor(fm, system=mopad_basis)
bb = mopad_BeachBall(mt, npoints=size)
# show plot in a window
if outfile is None:
bb.ploBB(mopad_kwargs)
# save plot to file
else:
# no format specified, parse it from outfile name
if mopad_kwargs['plot_outfile_format'] is None:
mopad_kwargs['plot_outfile_format'] = \
mopad_kwargs['plot_outfile'].split(".")[-1]
else:
# append file format if not already at end of outfile
if not mopad_kwargs['plot_outfile'].endswith(
mopad_kwargs['plot_outfile_format']):
mopad_kwargs['plot_outfile'] += "." + \
mopad_kwargs['plot_outfile_format']
bb.save_BB(mopad_kwargs)
def Beach(fm, linewidth=2, facecolor='b', bgcolor='w', edgecolor='k',
alpha=1.0, xy=(0, 0), width=200, size=100, nofill=False,
zorder=100, mopad_basis='USE'):
"""
Return a beach ball as a collection which can be connected to an
current matplotlib axes instance (ax.add_collection). Based on MoPaD.
S1, D1, and R1, the strike, dip and rake of one of the focal planes, can
be vectors of multiple focal mechanisms.
:param fm: Focal mechanism that is either number of mechanisms (NM) by 3
(strike, dip, and rake) or NM x 6 (M11, M22, M33, M12, M13, M23 - the
six independent components of the moment tensor, where the coordinate
system is 1,2,3 = Up,South,East which equals r,theta,phi). The strike
is of the first plane, clockwise relative to north.
The dip is of the first plane, defined clockwise and perpendicular to
strike, relative to horizontal such that 0 is horizontal and 90 is
vertical. The rake is of the first focal plane solution. 90 moves the
hanging wall up-dip (thrust), 0 moves it in the strike direction
(left-lateral), -90 moves it down-dip (normal), and 180 moves it
opposite to strike (right-lateral).
:param facecolor: Color to use for quadrants of tension; can be a string,
e.g. ``'r'``, ``'b'`` or three component color vector, [R G B].
Defaults to ``'b'`` (blue).
:param bgcolor: The background color. Defaults to ``'w'`` (white).
:param edgecolor: Color of the edges. Defaults to ``'k'`` (black).
:param alpha: The alpha level of the beach ball. Defaults to ``1.0``
(opaque).
:param xy: Origin position of the beach ball as tuple. Defaults to
``(0, 0)``.
:type width: int
:param width: Symbol size of beach ball. Defaults to ``200``.
:param size: Controls the number of interpolation points for the
curves. Minimum is automatically set to ``100``.
:param nofill: Do not fill the beach ball, but only plot the planes.
:param zorder: Set zorder. Artists with lower zorder values are drawn
first.
:param mopad_basis: The basis system. Defaults to ``'USE'``. See the
`Supported Basis Systems`_ section below for a full list of supported
systems.
.. rubric:: _`Supported Basis Systems`
========= =================== =============================================
Short Basis vectors Usage
========= =================== =============================================
``'NED'`` North, East, Down Jost and Herrmann 1989
``'USE'`` Up, South, East Global CMT Catalog, Larson et al. 2010
``'XYZ'`` East, North, Up General formulation, Jost and Herrmann 1989
``'RT'`` Radial, Transverse, psmeca (GMT), Wessel and Smith 1999
Tangential
``'NWU'`` North, West, Up Stein and Wysession 2003
========= =================== =============================================
"""
# initialize beachball
mt = mopad_MomentTensor(fm, system=mopad_basis)
bb = mopad_BeachBall(mt, npoints=size)
bb._setup_BB(unit_circle=False)
# extract the coordinates and colors of the lines
radius = width / 2.0
neg_nodalline = bb._nodalline_negative_final_US
pos_nodalline = bb._nodalline_positive_final_US
tension_colour = facecolor
pressure_colour = bgcolor
if nofill:
tension_colour = 'none'
pressure_colour = 'none'
# based on mopads _setup_plot_US() function
# collect patches for the selection
coll = [None, None, None]
coll[0] = patches.Circle(xy, radius=radius)
coll[1] = xy2patch(neg_nodalline[0, :], neg_nodalline[1, :], radius, xy)
coll[2] = xy2patch(pos_nodalline[0, :], pos_nodalline[1, :], radius, xy)
# set the color of the three parts
fc = [None, None, None]
if bb._plot_clr_order > 0:
fc[0] = pressure_colour
fc[1] = tension_colour
fc[2] = tension_colour
if bb._plot_curve_in_curve != 0:
fc[0] = tension_colour
if bb._plot_curve_in_curve < 1:
fc[1] = pressure_colour
fc[2] = tension_colour
else:
coll = [coll[i] for i in (0, 2, 1)]
fc[1] = pressure_colour
fc[2] = tension_colour
else:
fc[0] = tension_colour
fc[1] = pressure_colour
fc[2] = pressure_colour
if bb._plot_curve_in_curve != 0:
fc[0] = pressure_colour
if bb._plot_curve_in_curve < 1:
fc[1] = tension_colour
fc[2] = pressure_colour
else:
coll = [coll[i] for i in (0, 2, 1)]
fc[1] = tension_colour
fc[2] = pressure_colour
if bb._pure_isotropic:
if abs(np.trace(bb._M)) > epsilon:
# use the circle as the most upper layer
coll = [coll[0]]
if bb._plot_clr_order < 0:
fc = [tension_colour]
else:
fc = [pressure_colour]
# transform the patches to a path collection and set
# the appropriate attributes
collection = collections.PatchCollection(coll, match_original=False)
collection.set_facecolors(fc)
collection.set_edgecolors(edgecolor)
collection.set_alpha(alpha)
collection.set_linewidth(linewidth)
collection.set_zorder(zorder)
return collection
def Beachball(fm, linewidth=2, facecolor='b', bgcolor='w', edgecolor='k',
alpha=1.0, xy=(0, 0), width=200, size=100, nofill=False,
zorder=100, mopad_basis='USE', outfile=None, format=None,
fig=None):
"""
Draws a beach ball diagram of an earthquake focal mechanism. Based on
MoPaD.
S1, D1, and R1, the strike, dip and rake of one of the focal planes, can
be vectors of multiple focal mechanisms.
:param fm: Focal mechanism that is either number of mechanisms (NM) by 3
(strike, dip, and rake) or NM x 6 (M11, M22, M33, M12, M13, M23 - the
six independent components of the moment tensor, where the coordinate
system is 1,2,3 = Up,South,East which equals r,theta,phi). The strike
is of the first plane, clockwise relative to north.
The dip is of the first plane, defined clockwise and perpendicular to
strike, relative to horizontal such that 0 is horizontal and 90 is
vertical. The rake is of the first focal plane solution. 90 moves the
hanging wall up-dip (thrust), 0 moves it in the strike direction
(left-lateral), -90 moves it down-dip (normal), and 180 moves it
opposite to strike (right-lateral).
:param facecolor: Color to use for quadrants of tension; can be a string,
e.g. ``'r'``, ``'b'`` or three component color vector, [R G B].
Defaults to ``'b'`` (blue).
:param bgcolor: The background color. Defaults to ``'w'`` (white).
:param edgecolor: Color of the edges. Defaults to ``'k'`` (black).
:param alpha: The alpha level of the beach ball. Defaults to ``1.0``
(opaque).
:param xy: Origin position of the beach ball as tuple. Defaults to
``(0, 0)``.
:type width: int
:param width: Symbol size of beach ball. Defaults to ``200``.
:param size: Controls the number of interpolation points for the
curves. Minimum is automatically set to ``100``.
:param nofill: Do not fill the beach ball, but only plot the planes.
:param zorder: Set zorder. Artists with lower zorder values are drawn
first.
:param mopad_basis: The basis system. Defaults to ``'USE'``. See the
`Supported Basis Systems`_ section below for a full list of supported
systems.
:param outfile: Output file string. Also used to automatically
determine the output format. Supported file formats depend on your
matplotlib backend. Most backends support png, pdf, ps, eps and
svg. Defaults to ``None``.
:param format: Format of the graph picture. If no format is given the
outfile parameter will be used to try to automatically determine
the output format. If no format is found it defaults to png output.
If no outfile is specified but a format is, than a binary
imagestring will be returned.
Defaults to ``None``.
:param fig: Give an existing figure instance to plot into. New Figure if
set to ``None``.
.. rubric:: _`Supported Basis Systems`
========= =================== =============================================
Short Basis vectors Usage
========= =================== =============================================
``'NED'`` North, East, Down Jost and Herrmann 1989
``'USE'`` Up, South, East Global CMT Catalog, Larson et al. 2010
``'XYZ'`` East, North, Up General formulation, Jost and Herrmann 1989
``'RT'`` Radial, Transverse, psmeca (GMT), Wessel and Smith 1999
Tangential
``'NWU'`` North, West, Up Stein and Wysession 2003
========= =================== =============================================
.. rubric:: Examples
(1) Using basis system ``'NED'``.
>>> from obspy.imaging.mopad_wrapper import Beachball
>>> mt = [1, 2, 3, -4, -5, -10]
>>> Beachball(mt, mopad_basis='NED') #doctest: +SKIP
.. plot::
from obspy.imaging.mopad_wrapper import Beachball
mt = [1, 2, 3, -4, -5, -10]
Beachball(mt, mopad_basis='NED')
"""
mopad_kwargs = {}
loc = locals()
# map to kwargs used in mopad
for key in KWARG_MAP:
value = loc[key]
for mopad_key in KWARG_MAP[key]:
mopad_kwargs[mopad_key] = value
# convert from points to size in cm
for key in ['plot_aux_plot_size', 'plot_size']:
# 100.0 is matplotlibs default dpi for savefig
mopad_kwargs[key] = mopad_kwargs[key] / 100.0 * 2.54
# use nofill kwarg
mt = mopad_MomentTensor(fm, system=mopad_basis)
bb = mopad_BeachBall(mt, npoints=size)
# show plot in a window
if outfile is None:
bb.ploBB(mopad_kwargs)
# save plot to file
else:
# no format specified, parse it from outfile name
if mopad_kwargs['plot_outfile_format'] is None:
mopad_kwargs['plot_outfile_format'] = \
mopad_kwargs['plot_outfile'].split(".")[-1]
else:
# append file format if not already at end of outfile
if not mopad_kwargs['plot_outfile'].endswith(\
mopad_kwargs['plot_outfile_format']):
mopad_kwargs['plot_outfile'] += "." + \
mopad_kwargs['plot_outfile_format']
bb.save_BB(mopad_kwargs)
def beach(fm, linewidth=1, facecolor='0.75', bgcolor='w', edgecolor='k',
alpha=1.0, xy=(0, 0), width=200, size=100, nofill=False,
zorder=100, mopad_basis='NED', axes=None, show_iso=False):
"""
Plot beach ball based on `MoPaD <http://www.larskrieger.de/mopad/>`_
Function that returns a beach ball as a collection and can be added to
an existing :class:`~matplotlib.axes.Axes`. This is modified from the
:func:`~obspy.imaging.mopad_wrapper.beach` function to properly handle isotropic
components. Original function only supports pure isotropic sources when isotropic
components are plotted.
:param fm: focal mechanism in (strike, dip, rake) or (M11,M22,M33,M12,M13,M23).
The moment tensor elements are given for a coordinate system with axes pointing
in three directions. Default is North, East and Down.
:type fm: list
:param linewidth: width of nodal and border lines. Default is ``1``.
:type linewidth: float
:param facecolor: color or shade of the compressive quadrants.
Default is ``0.75`` (gray).
:type facecolor: str
:param bgcolor: background color, default is ``w`` (white).
:type bgcolor: str
:param edgecolor: color of nodal and border lines, default is ``b`` (black).
:type edgecolor: str
:param alpha: beach ball transparency, default is ``1.0`` (opaque).
:type alpha: float
:param xy: original position of the beach ball. Default is ``(0, 0)``
:type xy: tuple
:param width: width of the beach ball (aka symbol size). Default is ``200``.
:type width: int
:param size: number of points interpolated to draw the cruve. Default is ``100``.
:type size: int
:param nofill: no shading of the beach ball. Default is ``False``.
:type nofill: bool
:param zorder: set the zorder for the artist. Artists with lower zorder values are drawn first.
Default is ``100``.
:type zorder: float
:param mopad_basis: moment tensor coordinate system. See supported coordinate
system below. Default is ``"NED"``.
:type mopad_basis: str
:param axes: figure axis for beach ball, this is used to ensure the aspect ratio is
adjusted so that the beach ball is circular on non-scaled axes.
Default is ``None``.
:type axes: :class:`~matplotlib.axes.Axes`
:param show_iso: flag to display the isotropic component, default is ``False``.
:type show_iso: bool
:return: a collection of lines and polygons.
:rtype: :class:`~matplotlib.collections.PatchCollection`
.. rubric:: Supported coordinate systems:
.. cssclass: table-striped
================ ================== ==========================
``mopad_basis`` vectors reference
================ ================== ==========================
"NED" north, east, down Jost and Herrmann, 1989
"USE" up, south, east Larson et al., 2010
"XYZ" east, north, up Jost and Herrmann, 1989
"NWU" north, west, up Stein and Wysession, 2003
================ ================== ==========================
"""
# initialize beachball
mt = mopad_MomentTensor(fm, system=mopad_basis)
bb = mopad_BeachBall(mt, npoints=size)
## Snippets added by A. Chiang
if show_iso:
bb._plot_isotropic_part = True
bb._nodallines_in_NED_system()
##
bb._setup_BB(unit_circle=False)
# extract the coordinates and colors of the lines
radius = width / 2.0
neg_nodalline = bb._nodalline_negative_final_US
pos_nodalline = bb._nodalline_positive_final_US
tension_colour = facecolor
pressure_colour = bgcolor
if nofill:
tension_colour = 'none'
pressure_colour = 'none'
# based on mopads _setup_plot_US() function
# collect patches for the selection
coll = [None, None, None]
coll[0] = patches.Circle(xy, radius=radius)
coll[1] = xy2patch(neg_nodalline[0, :], neg_nodalline[1, :], radius, xy)
coll[2] = xy2patch(pos_nodalline[0, :], pos_nodalline[1, :], radius, xy)
# set the color of the three parts
fc = [None, None, None]
if bb._plot_clr_order > 0:
fc[0] = pressure_colour
fc[1] = tension_colour
fc[2] = tension_colour
if bb._plot_curve_in_curve != 0:
fc[0] = tension_colour
if bb._plot_curve_in_curve < 1:
fc[1] = pressure_colour
fc[2] = tension_colour
else:
coll = [coll[i] for i in (0, 2, 1)]
fc[1] = pressure_colour
fc[2] = tension_colour
else:
fc[0] = tension_colour
fc[1] = pressure_colour
fc[2] = pressure_colour
if bb._plot_curve_in_curve != 0:
fc[0] = pressure_colour
if bb._plot_curve_in_curve < 1:
fc[1] = tension_colour
fc[2] = pressure_colour
else:
coll = [coll[i] for i in (0, 2, 1)]
fc[1] = tension_colour
fc[2] = pressure_colour
if bb._pure_isotropic:
if abs(np.trace(bb._M)) > epsilon:
# use the circle as the most upper layer
coll = [coll[0]]
if bb._plot_clr_order < 0:
fc = [tension_colour]
else:
fc = [pressure_colour]
# transform the patches to a path collection and set
# the appropriate attributes
collection = mpl_collections.PatchCollection(coll, match_original=False)
collection.set_facecolors(fc)
# Use the given axes to maintain the aspect ratio of beac hballs on figure
# resize.
if axes is not None:
# This is what holds the aspect ratio (but breaks the positioning)
collection.set_transform(transforms.IdentityTransform()) # Need to find another way to print as vector graphics
# Next is a dirty hack to fix the positioning:
# 1. Need to bring the all patches to the origin (0, 0).
for p in collection._paths:
p.vertices -= xy
# 2. Then use the offset property of the collection to position the
# patches
collection.set_offsets(xy)
collection._transOffset = axes.transData
collection.set_edgecolors(edgecolor)
collection.set_alpha(alpha)
collection.set_linewidth(linewidth)
collection.set_zorder(zorder)
return collection
def beach(fm,
linewidth=1,
facecolor='0.75',
bgcolor='w',
edgecolor='k',
alpha=1.0,
xy=(0, 0),
width=200,
size=100,
nofill=False,
zorder=100,
mopad_basis='NED',
axes=None,
show_iso=False):
"""
Function taken from obspy.imaging.mopad_wrapper, minor modification to
include isotropic components, original source code only handles pure iso.
"""
# initialize beachball
mt = mopad_MomentTensor(fm, system=mopad_basis)
bb = mopad_BeachBall(mt, npoints=size)
## Snippets added by A. Chiang
if show_iso:
bb._plot_isotropic_part = True
bb._nodallines_in_NED_system()
##
bb._setup_BB(unit_circle=False)
# extract the coordinates and colors of the lines
radius = width / 2.0
neg_nodalline = bb._nodalline_negative_final_US
pos_nodalline = bb._nodalline_positive_final_US
tension_colour = facecolor
pressure_colour = bgcolor
if nofill:
tension_colour = 'none'
pressure_colour = 'none'
# based on mopads _setup_plot_US() function
# collect patches for the selection
coll = [None, None, None]
coll[0] = patches.Circle(xy, radius=radius)
coll[1] = xy2patch(neg_nodalline[0, :], neg_nodalline[1, :], radius, xy)
coll[2] = xy2patch(pos_nodalline[0, :], pos_nodalline[1, :], radius, xy)
# set the color of the three parts
fc = [None, None, None]
if bb._plot_clr_order > 0:
fc[0] = pressure_colour
fc[1] = tension_colour
fc[2] = tension_colour
if bb._plot_curve_in_curve != 0:
fc[0] = tension_colour
if bb._plot_curve_in_curve < 1:
fc[1] = pressure_colour
fc[2] = tension_colour
else:
coll = [coll[i] for i in (0, 2, 1)]
fc[1] = pressure_colour
fc[2] = tension_colour
else:
fc[0] = tension_colour
fc[1] = pressure_colour
fc[2] = pressure_colour
if bb._plot_curve_in_curve != 0:
fc[0] = pressure_colour
if bb._plot_curve_in_curve < 1:
fc[1] = tension_colour
fc[2] = pressure_colour
else:
coll = [coll[i] for i in (0, 2, 1)]
fc[1] = tension_colour
fc[2] = pressure_colour
if bb._pure_isotropic:
if abs(np.trace(bb._M)) > epsilon:
# use the circle as the most upper layer
coll = [coll[0]]
if bb._plot_clr_order < 0:
fc = [tension_colour]
else:
fc = [pressure_colour]
# transform the patches to a path collection and set
# the appropriate attributes
collection = mpl_collections.PatchCollection(coll, match_original=False)
collection.set_facecolors(fc)
# Use the given axes to maintain the aspect ratio of beachballs on figure
# resize.
if axes is not None:
# This is what holds the aspect ratio (but breaks the positioning)
collection.set_transform(transforms.IdentityTransform())
# Next is a dirty hack to fix the positioning:
# 1. Need to bring the all patches to the origin (0, 0).
for p in collection._paths:
p.vertices -= xy
# 2. Then use the offset property of the collection to position the
# patches
collection.set_offsets(xy)
collection._transOffset = axes.transData
collection.set_edgecolors(edgecolor)
collection.set_alpha(alpha)
collection.set_linewidth(linewidth)
collection.set_zorder(zorder)
return collection