Mercurial > fife-parpg

annotate demos/shooter/scripts/common/baseobject.py @ 476:78a1eb57c074

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Changed the way instances get deleted from the scene. Instances now get removed at the end of the frame as opposed to after their explosion action is complete. The old way was causing the odd segfault because the instance was being removed before FIFE was finished with it.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Thu, 22 Apr 2010 01:18:44 +0000
parents b78020d31186
children 6b33d80b468b
rev   line source
448
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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) 2005-2009 by the FIFE team
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5 # http://www.fifengine.de
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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 from fife import fife
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25 from scripts.common.helpers import normalize
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26 from scripts.common.helpers import Rect
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27
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28 class SpaceObject(object):
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29 def __init__(self, scene, name, findInstance=True):
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30 self._scene = scene
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31 self._model = self._scene.model
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32 self._layer = self._scene.objectlayer
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33 self._name = name
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34 self._xscale = self._layer.getCellGrid().getXScale()
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35 self._yscale = self._layer.getCellGrid().getYScale()
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36 self._velocity = fife.DoublePoint(0,0)
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37 self._maxvelocity = 1.25
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38 self._boundingBox = Rect(0,0,0,0)
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39 self._running = False
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40 self._changedPosition = False
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41 self._scenenodeid = -1
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42
448
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43 if findInstance:
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44 self._instance = self._layer.getInstance(self._name)
473
b78020d31186 Small update to ensure python doesn't try to delete objects that FIFE owns.
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45 self._instance.thisown = 0
448
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46 else:
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47 self._instnace = None
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48
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49 def start(self):
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50 if self._instance:
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51 self._running = True
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52
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53 def update(self):
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54 if self._running:
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55 shiploc = self.location
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56 exactloc = shiploc.getExactLayerCoordinates()
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57
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58 exactloc.x += self._velocity.x * (self._scene.timedelta/1000.0)/self._xscale
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59 exactloc.y += self._velocity.y * (self._scene.timedelta/1000.0)/self._yscale
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60
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61 self._boundingBox.x = (exactloc.x * self._xscale - self._boundingBox.w/2)
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62 self._boundingBox.y = (exactloc.y * self._yscale - self._boundingBox.h/2)
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63
449
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64 shiploc.setExactLayerCoordinates(exactloc)
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65
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66 if shiploc == self.location:
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67 self._changePosition = False
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68 else:
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69 self._changedPosition = True
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70
449
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71 self.location = shiploc
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72
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73 def stop(self):
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74 self._running = False
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75
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76 def destroy(self):
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77 self._running = False
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78
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79 def applyThrust(self, vector):
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80 self._velocity.x += (vector.x * (self._scene.timedelta/1000.0))/self._xscale
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81 self._velocity.y += (vector.y * (self._scene.timedelta/1000.0))/self._yscale
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82
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83 if self._velocity.length() > self._maxvelocity:
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84 norm = normalize(self._velocity)
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85 self._velocity.x = norm.x * self._maxvelocity
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86 self._velocity.y = norm.y * self._maxvelocity
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87
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88
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89 def applyBrake(self, brakingForce):
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90
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91 if self._velocity.length() <= .01:
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92 self._velocity.x = 0
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93 self._velocity.y = 0
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94 return
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95
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96 #first normalize to get a unit vector of the direction we are traveling
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97 norm = normalize(self._velocity)
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98 if norm.length() == 0:
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99 self._velocity.x = 0
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100 self._velocity.y = 0
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101 return
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102
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103 #negate to get opposite direction
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104 norm.x = norm.x * -1
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105 norm.y = norm.y * -1
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106
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107 #apply braking deceleration
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108 norm.x *= brakingForce
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109 norm.y *= brakingForce
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110
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111 self._velocity.x += (norm.x * (self._scene.timedelta/1000.0))/self._xscale
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112 self._velocity.y += (norm.y * (self._scene.timedelta/1000.0))/self._yscale
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113
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114 def removeFromScene(self):
476
78a1eb57c074 Changed the way instances get deleted from the scene. Instances now get removed at the end of the frame as opposed to after their explosion action is complete. The old way was causing the odd segfault because the instance was being removed before FIFE was finished with it.
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115 self._scene.queueObjectForRemoval(self)
78a1eb57c074 Changed the way instances get deleted from the scene. Instances now get removed at the end of the frame as opposed to after their explosion action is complete. The old way was causing the odd segfault because the instance was being removed before FIFE was finished with it.
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116 # if self._instance:
78a1eb57c074 Changed the way instances get deleted from the scene. Instances now get removed at the end of the frame as opposed to after their explosion action is complete. The old way was causing the odd segfault because the instance was being removed before FIFE was finished with it.
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117 # self._layer.deleteInstance(self._instance)
78a1eb57c074 Changed the way instances get deleted from the scene. Instances now get removed at the end of the frame as opposed to after their explosion action is complete. The old way was causing the odd segfault because the instance was being removed before FIFE was finished with it.
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118 # self._instance = None
449
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119
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120 def _isRunning(self):
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121 return self._running
448
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122
5e2ec84902a7 Did a little re-factoring.
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123 def _getMaxVelocity(self):
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124 return self._maxvelocity
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125
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126 def _setMaxVelocity(self, maxvel):
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127 self._maxvelocity = maxvel/sqrt(self._xscale * self._yscale)
5e2ec84902a7 Did a little re-factoring.
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128
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129 def _getLocation(self):
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130 return self._instance.getLocation()
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131
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132 def _setLocation(self, loc):
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133 self._instance.setLocation(loc)
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134
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135 def _getInstance(self):
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136 return self._instance
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137
5e2ec84902a7 Did a little re-factoring.
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138 def _setInstance(self, instance):
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139 self._instance = instance
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140
5e2ec84902a7 Did a little re-factoring.
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141 def _getVelocity(self):
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142 return self._velocity
449
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143
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144 def _setVelocity(self, velocity):
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145 self._velocity = velocity
448
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146
449
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147 def _getBoundingBox(self):
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148 return self._boundingBox
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149
1cf56403347a Added object bounding boxes.
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150 def _getW(self):
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151 return self._boundingBox.w
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152
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153 def _getH(self):
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154 return self._boundingBox.h
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155
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156 def _setW(self, w):
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157 self._boundingBox.w = w
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158
1cf56403347a Added object bounding boxes.
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159 def _setH(self, h):
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160 self._boundingBox.h = h
453
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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161
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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162 def _changedPosition(self):
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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163 return self._changedPosition
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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164
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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165 def _getNodeId(self):
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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166 return self._scenenodeid
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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167
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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168 def _setNodeId(self, id):
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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169 self._scenenodeid = id
449
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170
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171 width = property(_getW, _setW)
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diff changeset
172 height = property(_getH, _setH)
1cf56403347a Added object bounding boxes.
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173 boundingbox = property(_getBoundingBox)
448
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174 location = property(_getLocation,_setLocation)
5e2ec84902a7 Did a little re-factoring.
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175 instance = property(_getInstance, _setInstance)
449
1cf56403347a Added object bounding boxes.
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176 velocity = property(_getVelocity, _setVelocity)
1cf56403347a Added object bounding boxes.
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diff changeset
177 maxvelocity = property(_getMaxVelocity, _setMaxVelocity)
453
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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diff changeset
178 running = property(_isRunning)
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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179 changedposition = property(_changedPosition)
cf53848fb187 Scene now gets updated when an object moves from one node to another.
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diff changeset
180 scenenodeid = property(_getNodeId, _setNodeId)