Mercurial > fife-parpg

annotate engine/python/fife/extensions/fife_math.py @ 494:e241d7553496

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Fixing the epydoc markup. Did some more commenting.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Mon, 10 May 2010 15:54:21 +0000
parents 16ceb3228324
children ae9f5383f5b1
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
parents:
diff changeset
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
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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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
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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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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16 # Lesser General Public License for more details.
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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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 from fife import fife
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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25 import math
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26
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27 """
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28 Math Library
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29 ==================================
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30
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31 This is a collection of useful 2D math functions/classes.
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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32 """
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33
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34
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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35 def normalize(vector):
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36 """
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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37 Helper function to normalize a 2D vector
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38
494
e241d7553496 Fixing the epydoc markup. Did some more commenting.
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39 @param vector: a L{fife.DoublePoint} to be normalized
e241d7553496 Fixing the epydoc markup. Did some more commenting.
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40 @type vector: L{fife.DoublePoint}
492
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41
494
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42 @return: A normalized L{fife.DoublePoint}
492
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43 """
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44 norm = fife.DoublePoint(0,0)
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45
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46 invLength = 1.0/vector.length()
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47 if invLength > 1e-06:
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48 norm.x = vector.x * invLength;
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49 norm.y = vector.y * invLength;
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50 else:
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51 norm.x = 0
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52 norm.y = 0
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53
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54 return norm
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55
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56 class Rect(object):
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57 """
494
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58 A simple rectangle class that allows floating point values.
492
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59
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60 A class used to specify the bounding box of objects. For use
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61 with collision detection. This was written in python because
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62 FIFE does not provide a Rect class that can use floating point
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63 values.
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64 """
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65 def __init__(self, x = 0, y = 0, w = 0, h = 0):
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66 """
494
e241d7553496 Fixing the epydoc markup. Did some more commenting.
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67 @param x: The x coordinate
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68 @type x: C{int} or C{float}
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69 @param y: The y coordinate
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70 @type y: C{int} or C{float}
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71 @param w: The width
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72 @type w: C{int} or C{float}
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73 @param h: The height
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74 @type h: C{int} or C{float}
492
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75 """
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76 self._x = x
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77 self._y = y
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78 self._w = w
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79 self._h = h
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80
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81 def intersects(self, rect):
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82 """
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83 Tests for intersection of rect.
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84
494
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85 @param rect: the L{Rect} to perform the test against.
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86 @type rect: L{Rect}
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87
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88 @return: True if the rectancles intersect, False if not.
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89 @rtype: C{boolean}
492
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90 """
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91 _x = self._x - rect.x;
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92 _y = self._y - rect.y;
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93 _w = self._w;
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94 _h = self._h;
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95
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96 if _x < 0:
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97 _w += _x
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98 _x = 0
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99
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100 if _y < 0:
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101 _h += _y
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102 _y = 0
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103
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104 if _x + _w > rect.w:
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105 _w = rect.w - _x
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106
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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107 if _y + _h > rect.h:
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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108 _h = rect.h - _y
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109
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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110 if _w <= 0 or _h <= 0:
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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111 return False
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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112
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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113 return True
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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114
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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115 def _setX(self, x):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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116 self._x = x
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117
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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118 def _getX(self):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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119 return self._x
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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120
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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121 def _setY(self, y):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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122 self._y = y
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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123
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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124 def _getY(self):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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125 return self._y
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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126
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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127 def _setW(self, w):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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128 self._w = w
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129
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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130 def _getW(self):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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131 return self._w
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132
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133 def _setH(self, h):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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134 self._h = h
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
135
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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diff changeset
136 def _getH(self):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
137 return self._h
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
138
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
139 x = property(_getX, _setX)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
140 y = property(_getY, _setY)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
141 w = property(_getW, _setW)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
142 h = property(_getH, _setH)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
143
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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144 def rotatePoint(origin, point, angle):
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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diff changeset
145 """
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
146 Rotates a point around the specified origin.
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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147
494
e241d7553496 Fixing the epydoc markup. Did some more commenting.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 492
diff changeset
148 @param origin: A L{fife.DoublePoint} specifying the origin.
e241d7553496 Fixing the epydoc markup. Did some more commenting.
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parents: 492
diff changeset
149 @type origin: L{fife.DoublePoint}
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 492
diff changeset
150 @param point: A L{fife.DoublePoint} to be rotated.
e241d7553496 Fixing the epydoc markup. Did some more commenting.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 492
diff changeset
151 @type point: L{fife.DoublePoint}
e241d7553496 Fixing the epydoc markup. Did some more commenting.
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parents: 492
diff changeset
152 @param angle: The angle in which to rotate the point.
e241d7553496 Fixing the epydoc markup. Did some more commenting.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 492
diff changeset
153 @type angle: C{int} or C{float}
492
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
154
494
e241d7553496 Fixing the epydoc markup. Did some more commenting.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 492
diff changeset
155 @return: A L{fife.DoublePoint} representing the rotated point.
e241d7553496 Fixing the epydoc markup. Did some more commenting.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 492
diff changeset
156 @rtype: L{fife.DoublePoint}
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
parents:
diff changeset
157 """
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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diff changeset
158 newp = fife.DoublePoint(0,0)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
159
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
160 theta = (angle * math.pi)/180
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
161
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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diff changeset
162 costheta = math.cos(theta)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
163 sintheta = math.sin(theta)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents:
diff changeset
164
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
165 x = point.x - origin.x
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
166 y = point.y - origin.y
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
167
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
168 newp.x = costheta * x - sintheta * y
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
169 newp.y = sintheta * x + costheta * y
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
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
171 return newp
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
172
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
173 __all__ = ['normalize','Rect','rotatePoint']