Mercurial > fife-parpg

annotate demos/shooter/scripts/common/baseobject.py @ 448:5e2ec84902a7

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Did a little re-factoring. Introduced the scene graph for collision detection. Changed the time scale to be accurate.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Thu, 01 Apr 2010 17:03:34 +0000
parents
children 1cf56403347a
rev   line source
448
5e2ec84902a7 Did a little re-factoring.
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) 2005-2009 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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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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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
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27 class SpaceObject(object):
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28 def __init__(self, model, name, layer, findInstance=True):
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29 self._model = model
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30 self._layer = layer
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31 self._name = name
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32 self._xscale = self._layer.getCellGrid().getXScale()
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33 self._yscale = self._layer.getCellGrid().getYScale()
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34 self._velocity = fife.DoublePoint(0,0)
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35 self._maxvelocity = 1
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36 self._timedelta = 0
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37
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38 if findInstance:
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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39 self._instance = self._layer.getInstance(self._name)
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40 else:
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41 self._instnace = None
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42
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43 def start(self):
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44 pass
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45
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46 def update(self, timedelta):
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47 self._timedelta = timedelta
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48
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49 shiploc = self.location
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50 exactloc = shiploc.getExactLayerCoordinates()
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51
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52 exactloc.x += self._velocity.x
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53 exactloc.y += self._velocity.y
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54
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55 shiploc.setExactLayerCoordinates(exactloc)
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56 self.location = shiploc
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57
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58 def stop(self):
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59 pass
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60
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61 def destroy(self):
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62 pass
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63
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64 def applyThrust(self, vector, timedelta):
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65 self._velocity.x += (vector.x * (timedelta/100.0))/self._xscale
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66 self._velocity.y += (vector.y * (timedelta/100.0))/self._yscale
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67
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68 if self._velocity.length() > self._maxvelocity:
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69 norm = normalize(self._velocity)
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70 self._velocity.x = norm.x * self._maxvelocity
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71 self._velocity.y = norm.y * self._maxvelocity
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72
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73
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74 def applyBrake(self, brakingForce, timedelta):
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75
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76 if self._velocity.length() <= .001:
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77 self._velocity.x = 0
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78 self._velocity.y = 0
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79 return
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80
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81 #first normalize to get a unit vector of the direction we are traveling
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82 norm = normalize(self._velocity)
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83 if norm.length() == 0:
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84 self._velocity.x = 0
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85 self._velocity.y = 0
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86 return
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87
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88 #negate to get opposite direction
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89 norm.x = norm.x * -1
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90 norm.y = norm.y * -1
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91
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92 #apply braking deceleration
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93 norm.x *= brakingForce
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94 norm.y *= brakingForce
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95
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96 self._velocity.x += (norm.x * (timedelta/100.0))/self._xscale
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97 self._velocity.y += (norm.y * (timedelta/100.0))/self._yscale
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98
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99 def _getMaxVelocity(self):
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100 return self._maxvelocity
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101
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102 def _setMaxVelocity(self, maxvel):
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103 self._maxvelocity = maxvel/sqrt(self._xscale * self._yscale)
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104
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105 def _getLocation(self):
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106 return self._instance.getLocation()
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107
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108 def _setLocation(self, loc):
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109 self._instance.setLocation(loc)
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110
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111 def _getInstance(self):
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112 return self._instance
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113
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114 def _setInstance(self, instance):
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115 self._instance = instance
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116
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117 def _getVelocity(self):
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118 return self._velocity
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119
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120 location = property(_getLocation,_setLocation)
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121 instance = property(_getInstance, _setInstance)
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122 velocity = property(_getVelocity)
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123 maxvelocity = property(_getMaxVelocity, _setMaxVelocity)