/usr/share/pyshared/aafigure/shapes.py is in python-aafigure 0.5-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | # Common shapes for the aafigure package.
#
# (C) 2009 Chris Liechti <cliechti@gmx.net>
#
# This is open source software under the BSD license. See LICENSE.txt for more
# details.
#
# This intentionally is no doc comment to make it easier to include the module
# in Sphinx ``.. automodule::``
import math
def point(object):
"""return a Point instance.
- if object is already a Point instance it's returned as is
- complex numbers are converted to Points
- a tuple with two elements (x,y)
"""
if isinstance(object, Point):
return object
#~ print type(object), object.__class__
if type(object) is complex:
return Point(object.real, object.imag)
if type(object) is tuple and len(object) == 2:
return Point(object[0], object[1])
raise ValueError('can not convert %r to a Point')
def group(list_of_shapes):
"""return a group if the number of shapes is greater than one"""
if len(list_of_shapes) > 1:
return [Group(list_of_shapes)]
else:
return list_of_shapes
class Point:
"""A single point. This class primary use is to represent coordinates
for the other shapes.
"""
def __init__(self, x, y):
self.x = x
self.y = y
def __repr__(self):
return 'Point(%r, %r)' % (self.x, self.y)
def distance(self, other):
return math.sqrt( (self.x - other.x)**2 +
(self.y - other.y)**2 )
def midpoint(self, other):
return Point( (self.x + other.x)/2,
(self.y + other.y)/2 )
class Line:
"""Line with starting and ending point. Both ends can have arrows"""
def __init__(self, start, end, thick=False):
self.thick = thick
self.start = point(start)
self.end = point(end)
def __repr__(self):
return 'Line(%r, %r)' % (self.start, self.end)
class Rectangle:
"""Rectangle with two edge coordinates."""
def __init__(self, p1, p2):
self.p1 = point(p1)
self.p2 = point(p2)
def __repr__(self):
return 'Rectangle(%r, %r)' % (self.p1, self.p2)
class Circle:
"""Circle with center coordinates and radius."""
def __init__(self, center, radius):
self.center = point(center)
self.radius = radius
def __repr__(self):
return 'Circle(%r, %r)' % (self.center, self.radius)
class Label:
"""A text label at a position"""
def __init__(self, position, text):
self.position = position
self.text = text
def __repr__(self):
return 'Label(%r, %r)' % (self.position, self.text)
class Group:
"""A group of shapes"""
def __init__(self, shapes=None):
if shapes is None: shapes = []
self.shapes = shapes
def __repr__(self):
return 'Group(%r)' % (self.shapes,)
class Arc:
"""A smooth arc between two points"""
def __init__(self, start, start_angle, end, end_angle, start_curve=True, end_curve=True):
self.start = point(start)
self.end = point(end)
self.start_angle = start_angle
self.end_angle = end_angle
self.start_curve = start_curve
self.end_curve = end_curve
def __repr__(self):
return 'Arc(%r, %r, %r, %r, %r, %r)' % (self.start, self.start_angle,
self.end, self.end_angle,
self.start_curve, self.end_curve)
def start_angle_rad(self):
return self.start_angle * math.pi / 180
def end_angle_rad(self):
return self.end_angle * math.pi / 180
def __tension(self):
return self.start.distance( self.end )/3
# assumptions: x increases going right, y increases going down
def start_control_point(self):
if self.start_curve:
dd = self.__tension()
angle = self.start_angle_rad()
return Point(self.start.x + dd * math.cos(angle),
self.start.y - dd * math.sin(angle))
else:
return self.start
def end_control_point(self):
if self.end_curve:
dd = self.__tension()
angle = self.end_angle_rad()
return Point(self.end.x + dd * math.cos(angle),
self.end.y - dd * math.sin(angle))
else:
return self.end
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