Mercurial > fife-parpg

annotate engine/python/fife/extensions/fife_math.py @ 492:16ceb3228324

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Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions. Fixed fife_timer as it didn't work in the first place. Modified the SoundManager to use the now working fife_timer and removed the Timer class from the shooter demo entirely
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Fri, 07 May 2010 21:07:27 +0000
parents
children e241d7553496
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
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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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 #
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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8 # FIFE is free software; you can redistribute it and/or
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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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.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
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11 # version 2.1 of the License, or (at your option) any later version.
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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12 #
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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13 # This library is distributed in the hope that it will be useful,
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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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 #
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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18 # You should have received a copy of the GNU Lesser General Public
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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19 # License along with this library; if not, write to the
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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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
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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24 from fife import fife
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25 import math
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26
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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27 """
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28 Math Library
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29 ==================================
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30
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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31 This is a collection of useful 2D math functions/classes.
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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):
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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36 """
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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37 Helper function to normalize a 2D vector
16ceb3228324 Moved the SoundManager and the 2D math function (helpers) from the shooter demo to the fife extensions.
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38
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39 @param vector a L{fife.DoublePoint} to be normalized
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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 """
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57 Rect
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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 """
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66 @param x The x coordinate
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67 @param y The y coordinate
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68 @param w The width
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69 @param h The height
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70 """
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71 self._x = x
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72 self._y = y
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73 self._w = w
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74 self._h = h
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75
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76 def intersects(self, rect):
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77 """
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78 Tests for intersection of rect.
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79
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80 @param rect the Rect to perform the test against
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81 @return True if the rectancles intersect, False if not.
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82 """
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83 _x = self._x - rect.x;
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84 _y = self._y - rect.y;
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85 _w = self._w;
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86 _h = self._h;
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87
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88 if _x < 0:
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89 _w += _x
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90 _x = 0
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91
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92 if _y < 0:
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93 _h += _y
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94 _y = 0
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95
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96 if _x + _w > rect.w:
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97 _w = rect.w - _x
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98
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99 if _y + _h > rect.h:
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100 _h = rect.h - _y
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101
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102 if _w <= 0 or _h <= 0:
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103 return False
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104
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105 return True
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106
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107 def _setX(self, x):
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108 self._x = x
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109
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110 def _getX(self):
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111 return self._x
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112
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113 def _setY(self, y):
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114 self._y = y
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115
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116 def _getY(self):
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117 return self._y
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118
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119 def _setW(self, w):
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120 self._w = w
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121
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122 def _getW(self):
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123 return self._w
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124
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125 def _setH(self, h):
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126 self._h = h
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127
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128 def _getH(self):
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129 return self._h
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130
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131 x = property(_getX, _setX)
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132 y = property(_getY, _setY)
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133 w = property(_getW, _setW)
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134 h = property(_getH, _setH)
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135
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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136 def rotatePoint(origin, point, angle):
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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137 """
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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138 Rotates a point around the specified origin.
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139
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140 @param origin A L{fife.DoublePoint} specifying the origin.
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141 @param point A L{fife.DoublePoint} to be rotated.
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142 @param angle The angle in which to rotate the point.
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143
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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144 @return A L{fife.DoublePoint} representing the rotated point.
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145 """
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146 newp = fife.DoublePoint(0,0)
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147
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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148 theta = (angle * math.pi)/180
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149
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150 costheta = math.cos(theta)
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151 sintheta = math.sin(theta)
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152
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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153 x = point.x - origin.x
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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154 y = point.y - origin.y
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155
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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156 newp.x = costheta * x - sintheta * y
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
157 newp.y = sintheta * x + costheta * y
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158
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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159 return newp
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160
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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161 __all__ = ['normalize','Rect','rotatePoint']