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[SPRINT] Closes #1752. Patch3DCollection can now be empty. #2162

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Merged
merged 1 commit into from
Jun 29, 2013
Merged

[SPRINT] Closes #1752. Patch3DCollection can now be empty. #2162

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23 changes: 19 additions & 4 deletions lib/mpl_toolkits/mplot3d/art3d.py
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Original file line number Diff line number Diff line change
Expand Up @@ -293,8 +293,23 @@ class Patch3DCollection(PatchCollection):
'''

def __init__(self, *args, **kwargs):
"""
Create a collection of flat 3D patches with its normal vector
pointed in *zdir* direction, and located at *zs* on the *zdir*
axis. 'zs' can be a scalar or an array-like of the same length as
the number of patches in the collection.

Constructor arguments are the same as for
:class:`~matplotlib.collections.PatchCollection`. In addition,
keywords *zs=0* and *zdir='z'* are available.

"""
zs = kwargs.pop('zs', 0)
zdir = kwargs.pop('zdir', 'z')
PatchCollection.__init__(self, *args, **kwargs)
self._old_draw = lambda x: PatchCollection.draw(self, x)
self.set_3d_properties(zs, zdir)


def set_sort_zpos(self,val):
'''Set the position to use for z-sorting.'''
Expand All @@ -306,11 +321,11 @@ def set_3d_properties(self, zs, zdir):
self.update_scalarmappable()
offsets = self.get_offsets()
if len(offsets) > 0:
xs, ys = zip(*self.get_offsets())
xs, ys = zip(*offsets)
else:
xs = [0] * len(zs)
ys = [0] * len(zs)
self._offsets3d = juggle_axes(xs, ys, zs, zdir)
xs = []
ys = []
self._offsets3d = juggle_axes(xs, ys, np.atleast_1d(zs), zdir)
self._facecolor3d = self.get_facecolor()
self._edgecolor3d = self.get_edgecolor()

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