"""Support for GEOS prepared geometry operations."""
from pickle import PicklingError
import shapely
class PreparedGeometry:
"""A geometry prepared for efficient comparison to a set of other geometries.
Examples
--------
>>> from shapely.prepared import prep
>>> from shapely.geometry import Point, Polygon
>>> triangle = Polygon([(0.0, 0.0), (1.0, 1.0), (1.0, -1.0)])
>>> p = prep(triangle)
>>> p.intersects(Point(0.5, 0.5))
True
"""
def __init__(self, context):
"""Prepare a geometry for efficient comparison to other geometries."""
if isinstance(context, PreparedGeometry):
self.context = context.context
else:
shapely.prepare(context)
self.context = context
self.prepared = True
def contains(self, other):
"""Return True if the geometry contains the other, else False."""
return self.context.contains(other)
def contains_properly(self, other):
"""Return True if the geometry properly contains the other, else False."""
return self.context.contains_properly(other)
def covers(self, other):
"""Return True if the geometry covers the other, else False."""
return self.context.covers(other)
def crosses(self, other):
"""Return True if the geometries cross, else False."""
return self.context.crosses(other)
def disjoint(self, other):
"""Return True if geometries are disjoint, else False."""
return self.context.disjoint(other)
def intersects(self, other):
"""Return True if geometries intersect, else False."""
return self.context.intersects(other)
def overlaps(self, other):
"""Return True if geometries overlap, else False."""
return self.context.overlaps(other)
def touches(self, other):
"""Return True if geometries touch, else False."""
return self.context.touches(other)
def within(self, other):
"""Return True if geometry is within the other, else False."""
return self.context.within(other)
def __reduce__(self):
"""Pickling is not supported."""
raise PicklingError("Prepared geometries cannot be pickled.")
def prep(ob):
"""Create and return a prepared geometric object."""
return PreparedGeometry(ob)