Mercurial > fife-parpg

annotate engine/python/fife/extensions/fife_math.py @ 495:ae9f5383f5b1

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Added a new log module called Script. This should be used by the python modules. Did some code cleanup and comment cleanup. Added some more visible log modules to the shooter demo for fun.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Tue, 11 May 2010 21:30:55 +0000
parents e241d7553496
children c0c3f64bfc2d
rev   line source
492
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
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1 # -*- coding: utf-8 -*-
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2
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3 # ####################################################################
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4 # Copyright (C) 2005-2010 by the FIFE team
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5 # http://www.fifengine.net
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6 # This file is part of FIFE.
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7 #
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8 # FIFE is free software; you can redistribute it and/or
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9 # modify it under the terms of the GNU Lesser General Public
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10 # License as published by the Free Software Foundation; either
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11 # version 2.1 of the License, or (at your option) any later version.
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12 #
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13 # This library is distributed in the hope that it will be useful,
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14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 # Lesser General Public License for more details.
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17 #
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18 # You should have received a copy of the GNU Lesser General Public
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19 # License along with this library; if not, write to the
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20 # Free Software Foundation, Inc.,
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21 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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22 # ####################################################################
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23
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24 """
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25 Math Library
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26 ==================================
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27
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28 This is a collection of useful 2D math functions/classes.
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29 """
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30
495
ae9f5383f5b1 Added a new log module called Script. This should be used by the python modules.
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31 from fife import fife
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32 import math
492
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33
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34 def normalize(vector):
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35 """
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36 Helper function to normalize a 2D vector
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37
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38 @param vector: a L{fife.DoublePoint} to be normalized
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39 @type vector: L{fife.DoublePoint}
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40
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41 @return: A normalized L{fife.DoublePoint}
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42 """
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43 norm = fife.DoublePoint(0,0)
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44
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45 invLength = 1.0/vector.length()
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46 if invLength > 1e-06:
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47 norm.x = vector.x * invLength;
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48 norm.y = vector.y * invLength;
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49 else:
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50 norm.x = 0
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51 norm.y = 0
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52
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53 return norm
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54
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55 class Rect(object):
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56 """
494
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57 A simple rectangle class that allows floating point values.
492
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58
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59 A class used to specify the bounding box of objects. For use
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60 with collision detection. This was written in python because
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61 FIFE does not provide a Rect class that can use floating point
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62 values.
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63 """
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64 def __init__(self, x = 0, y = 0, w = 0, h = 0):
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65 """
494
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66 @param x: The x coordinate
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67 @type x: C{int} or C{float}
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68 @param y: The y coordinate
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69 @type y: C{int} or C{float}
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70 @param w: The width
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71 @type w: C{int} or C{float}
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72 @param h: The height
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73 @type h: C{int} or C{float}
492
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74 """
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75 self._x = x
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76 self._y = y
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77 self._w = w
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78 self._h = h
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79
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80 def intersects(self, rect):
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81 """
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82 Tests for intersection of rect.
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83
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84 @param rect: the L{Rect} to perform the test against.
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85 @type rect: L{Rect}
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86
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87 @return: True if the rectancles intersect, False if not.
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88 @rtype: C{boolean}
492
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89 """
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90 _x = self._x - rect.x;
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91 _y = self._y - rect.y;
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92 _w = self._w;
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93 _h = self._h;
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94
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95 if _x < 0:
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96 _w += _x
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97 _x = 0
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98
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99 if _y < 0:
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100 _h += _y
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101 _y = 0
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102
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103 if _x + _w > rect.w:
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104 _w = rect.w - _x
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105
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106 if _y + _h > rect.h:
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107 _h = rect.h - _y
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108
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109 if _w <= 0 or _h <= 0:
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110 return False
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111
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112 return True
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113
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114 def _setX(self, x):
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115 self._x = x
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116
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117 def _getX(self):
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118 return self._x
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119
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120 def _setY(self, y):
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121 self._y = y
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122
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123 def _getY(self):
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124 return self._y
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125
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126 def _setW(self, w):
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127 self._w = w
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128
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129 def _getW(self):
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130 return self._w
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131
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132 def _setH(self, h):
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133 self._h = h
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134
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135 def _getH(self):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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136 return self._h
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137
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138 x = property(_getX, _setX)
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139 y = property(_getY, _setY)
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140 w = property(_getW, _setW)
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141 h = property(_getH, _setH)
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142
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143 def rotatePoint(origin, point, angle):
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144 """
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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145 Rotates a point around the specified origin.
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146
495
ae9f5383f5b1 Added a new log module called Script. This should be used by the python modules.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 494
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147 @param origin: A point specifying the origin.
494
e241d7553496 Fixing the epydoc markup. Did some more commenting.
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parents: 492
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148 @type origin: L{fife.DoublePoint}
495
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parents: 494
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149 @param point: The point to be rotated.
494
e241d7553496 Fixing the epydoc markup. Did some more commenting.
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parents: 492
diff changeset
150 @type point: L{fife.DoublePoint}
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151 @param angle: The angle in which to rotate the point.
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parents: 492
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152 @type angle: C{int} or C{float}
492
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153
495
ae9f5383f5b1 Added a new log module called Script. This should be used by the python modules.
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parents: 494
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154 @return: The rotated point.
494
e241d7553496 Fixing the epydoc markup. Did some more commenting.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 492
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155 @rtype: L{fife.DoublePoint}
492
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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156 """
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157 newp = fife.DoublePoint(0,0)
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158
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
159 theta = (angle * math.pi)/180
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160
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
161 costheta = math.cos(theta)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
162 sintheta = math.sin(theta)
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163
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
164 x = point.x - origin.x
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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165 y = point.y - origin.y
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
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166
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
167 newp.x = costheta * x - sintheta * y
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
168 newp.y = sintheta * x + costheta * y
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
169
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
170 return newp
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parents:
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171
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
172 __all__ = ['normalize','Rect','rotatePoint']