61 lines
1.6 KiB
Python
61 lines
1.6 KiB
Python
from .. import axes, docstring
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from .geo import AitoffAxes, HammerAxes, LambertAxes, MollweideAxes
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from .polar import PolarAxes
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from mpl_toolkits.mplot3d import Axes3D
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class ProjectionRegistry:
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"""A mapping of registered projection names to projection classes."""
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def __init__(self):
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self._all_projection_types = {}
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def register(self, *projections):
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"""Register a new set of projections."""
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for projection in projections:
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name = projection.name
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self._all_projection_types[name] = projection
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def get_projection_class(self, name):
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"""Get a projection class from its *name*."""
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return self._all_projection_types[name]
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def get_projection_names(self):
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"""Return the names of all projections currently registered."""
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return sorted(self._all_projection_types)
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projection_registry = ProjectionRegistry()
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projection_registry.register(
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axes.Axes,
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PolarAxes,
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AitoffAxes,
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HammerAxes,
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LambertAxes,
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MollweideAxes,
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Axes3D,
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)
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def register_projection(cls):
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projection_registry.register(cls)
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def get_projection_class(projection=None):
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"""
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Get a projection class from its name.
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If *projection* is None, a standard rectilinear projection is returned.
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"""
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if projection is None:
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projection = 'rectilinear'
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try:
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return projection_registry.get_projection_class(projection)
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except KeyError as err:
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raise ValueError("Unknown projection %r" % projection) from err
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get_projection_names = projection_registry.get_projection_names
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docstring.interpd.update(projection_names=get_projection_names())
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