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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2018 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""offer some generic 2D bounding box features
"""
__authors__ = ["H. Payno"]
__license__ = "MIT"
__date__ = "07/09/2019"
from silx.math.combo import min_max
import numpy
class _BoundingBox:
"""
Simple 2D bounding box
:param tuple bottom_left: (y, x) bottom left point
:param tuple top_right: (y, x) top right point
"""
def __init__(self, bottom_left, top_right):
self.bottom_left = bottom_left
self.top_right = top_right
self.min_x = bottom_left[1]
self.min_y = bottom_left[0]
self.max_x = top_right[1]
self.max_y = top_right[0]
def contains(self, item):
"""
:param item: bouding box or point. If it is bounding check check if the
bottom_left and top_right corner of the given bounding box
are inside the current bounding box
:type: Union[BoundingBox, tuple]
:return:
"""
if isinstance(item, _BoundingBox):
return self.contains(item.bottom_left) and self.contains(item.top_right)
else:
return (
(self.min_x <= item[1] <= self.max_x) and
(self.min_y <= item[0] <= self.max_y)
)
def collide(self, bb):
"""
Check if the two bounding box collide
:param bb: bounding box to compare with
:type: :class:BoundingBox
:return: True if the two boxes collides
:rtype: bool
"""
assert isinstance(bb, _BoundingBox)
return (
(self.min_x < bb.max_x and self.max_x > bb.min_x) and
(self.min_y < bb.max_y and self.max_y > bb.min_y)
)
@staticmethod
def from_points(points):
"""
:param numpy.array tuple points: list of points. Should be 2D:
[(y1, x1), (y2, x2), (y3, x3), ...]
:return: bounding box from two points
:rtype: _BoundingBox
"""
if not isinstance(points, numpy.ndarray):
points_ = numpy.ndarray(points)
else:
points_ = points
x = points_[:, 1]
y = points_[:, 0]
x_min, x_max = min_max(x)
y_min, y_max = min_max(y)
return _BoundingBox(bottom_left=(y_min, x_min), top_right=(y_max, x_max))
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