Mercurial > fife-parpg

annotate demos/shooter/scripts/common/baseobject.py @ 491:c4168eb47a44

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Adding some comments to the shooter demo. Updated the copyright date and FIFE URL as well.
author prock@33b003aa-7bff-0310-803a-e67f0ece8222
date Thu, 06 May 2010 19:34:21 +0000
parents ab28994820dd
children 16ceb3228324
rev   line source
448
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1 # -*- coding: utf-8 -*-
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2
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3 # ####################################################################
491
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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 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
477
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28
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29 SHTR_DEFAULT = 0
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30 SHTR_PLAYER = 1
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31 SHTR_LASTBOSS = 2
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32 SHTR_PROJECTILE = 3
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33 SHTR_ENEMYSHIP = 4
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34 SHTR_POWERUP = 5
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35
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36
448
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37 class SpaceObject(object):
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38 """
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39 Space Object
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40
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41 This is the base class for all game objects.
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42 """
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43 def __init__(self, scene, name, findInstance=True):
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44 """
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45 @param scene A reference to the Scene
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46 @param name The name of the space object
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47 @param findInstance True if the instance you are looking for is already loaded
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48 False if you want to load the instance yourself
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49
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50 """
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51 self._scene = scene
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52 self._model = self._scene.model
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53 self._layer = self._scene.objectlayer
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54 self._name = name
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55 self._xscale = self._layer.getCellGrid().getXScale()
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56 self._yscale = self._layer.getCellGrid().getYScale()
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57 self._velocity = fife.DoublePoint(0,0)
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58 self._maxvelocity = 1.25
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59 self._boundingBox = Rect(0,0,0,0)
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60 self._running = False
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61 self._changedPosition = False
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62 self._scenenodeid = -1
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63 self._type = SHTR_DEFAULT
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64
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65 if findInstance:
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66 self._instance = self._layer.getInstance(self._name)
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67 self._instance.thisown = 0
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68 else:
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69 self._instnace = None
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70
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71 def start(self):
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72 """
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73 You must execute this function for the object to be updated
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74 """
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75 if self._instance:
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76 self._running = True
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77
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78 def update(self):
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79 """
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80 If the object is running this updates the FIFE instance location based on
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81 the objects current velocity and time since last frame
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82 """
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83 if self._running:
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84 shiploc = self.location
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85 exactloc = shiploc.getExactLayerCoordinates()
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86
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87 exactloc.x += self._velocity.x * (self._scene.timedelta/1000.0)/self._xscale
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88 exactloc.y += self._velocity.y * (self._scene.timedelta/1000.0)/self._yscale
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89
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90 self._boundingBox.x = (exactloc.x * self._xscale - self._boundingBox.w/2)
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91 self._boundingBox.y = (exactloc.y * self._yscale - self._boundingBox.h/2)
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92
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93 shiploc.setExactLayerCoordinates(exactloc)
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94
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95 if shiploc == self.location:
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96 self._changePosition = False
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97 else:
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98 self._changedPosition = True
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99
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100 self.location = shiploc
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101
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102 def stop(self):
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103 """
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104 Stops the object from being updated.
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105 """
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106 self._running = False
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107
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108 def destroy(self):
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109 """
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110 You are meant to override this function to specify what happens when the object
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111 gets destroyed
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112 """
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113 self._running = False
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114
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115 def applyThrust(self, vector):
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116 """
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117 Applies a thrust vector to the object. Note that objects do not have
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diff changeset
118 mass or any inertia.
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119
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diff changeset
120 @param vector A fife.DoublePoint() specifying the direction and intensity of thrust.
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121 """
454
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122 self._velocity.x += (vector.x * (self._scene.timedelta/1000.0))/self._xscale
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123 self._velocity.y += (vector.y * (self._scene.timedelta/1000.0))/self._yscale
448
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124
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125 if self._velocity.length() > self._maxvelocity:
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126 norm = normalize(self._velocity)
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127 self._velocity.x = norm.x * self._maxvelocity
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128 self._velocity.y = norm.y * self._maxvelocity
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129
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130
454
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131 def applyBrake(self, brakingForce):
491
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132 """
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133 Applies a braking thrust in the opposite direction of the current velocity
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134
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135 @param brakingForce a floating point value specifying how fast the object should decelerate
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136 """
451
f463ab431cc0 Movement shouldn't be dependent on framerate anymore.
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137 if self._velocity.length() <= .01:
448
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138 self._velocity.x = 0
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139 self._velocity.y = 0
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140 return
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141
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142 #first normalize to get a unit vector of the direction we are traveling
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143 norm = normalize(self._velocity)
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144 if norm.length() == 0:
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145 self._velocity.x = 0
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146 self._velocity.y = 0
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147 return
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148
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149 #negate to get opposite direction
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150 norm.x = norm.x * -1
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151 norm.y = norm.y * -1
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152
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153 #apply braking deceleration
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154 norm.x *= brakingForce
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155 norm.y *= brakingForce
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156
454
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157 self._velocity.x += (norm.x * (self._scene.timedelta/1000.0))/self._xscale
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158 self._velocity.y += (norm.y * (self._scene.timedelta/1000.0))/self._yscale
463
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159
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160 def removeFromScene(self):
491
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161 """
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162 Queues this object to be removed from the scene. The scene will remove the object
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163 next time the garbage collection routines are called.
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parents: 479
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164 """
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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165 self._scene.queueObjectForRemoval(self)
449
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parents: 448
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166
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167 def _isRunning(self):
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168 return self._running
448
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169
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170 def _getMaxVelocity(self):
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171 return self._maxvelocity
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172
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173 def _setMaxVelocity(self, maxvel):
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174 self._maxvelocity = maxvel/sqrt(self._xscale * self._yscale)
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175
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176 def _getLocation(self):
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177 return self._instance.getLocation()
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178
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179 def _setLocation(self, loc):
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180 self._instance.setLocation(loc)
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181
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182 def _getInstance(self):
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183 return self._instance
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184
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185 def _setInstance(self, instance):
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186 self._instance = instance
479
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187 if self._instance:
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188 self._instance.thisown = 0
448
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189
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190 def _getVelocity(self):
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191 return self._velocity
449
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192
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193 def _setVelocity(self, velocity):
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194 self._velocity = velocity
448
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195
449
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196 def _getBoundingBox(self):
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197 return self._boundingBox
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198
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199 def _getW(self):
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200 return self._boundingBox.w
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201
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202 def _getH(self):
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diff changeset
203 return self._boundingBox.h
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204
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205 def _setW(self, w):
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206 self._boundingBox.w = w
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207
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208 def _setH(self, h):
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diff changeset
209 self._boundingBox.h = h
453
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210
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diff changeset
211 def _changedPosition(self):
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212 return self._changedPosition
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213
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
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diff changeset
214 def _getNodeId(self):
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215 return self._scenenodeid
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diff changeset
216
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diff changeset
217 def _setNodeId(self, id):
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diff changeset
218 self._scenenodeid = id
477
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219
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parents: 476
diff changeset
220 def _getType(self):
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parents: 476
diff changeset
221 return self._type
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 476
diff changeset
222
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 476
diff changeset
223 def _setType(self, objtype):
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parents: 476
diff changeset
224 self._type = objtype
449
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 448
diff changeset
225
477
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 476
diff changeset
226 type = property(_getType, _setType)
449
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parents: 448
diff changeset
227 width = property(_getW, _setW)
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parents: 448
diff changeset
228 height = property(_getH, _setH)
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parents: 448
diff changeset
229 boundingbox = property(_getBoundingBox)
448
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parents:
diff changeset
230 location = property(_getLocation,_setLocation)
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parents:
diff changeset
231 instance = property(_getInstance, _setInstance)
449
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 448
diff changeset
232 velocity = property(_getVelocity, _setVelocity)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 448
diff changeset
233 maxvelocity = property(_getMaxVelocity, _setMaxVelocity)
453
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 451
diff changeset
234 running = property(_isRunning)
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prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 451
diff changeset
235 changedposition = property(_changedPosition)
491
c4168eb47a44 Adding some comments to the shooter demo. Updated the copyright date and FIFE URL as well.
prock@33b003aa-7bff-0310-803a-e67f0ece8222
parents: 479
diff changeset
236 scenenodeid = property(_getNodeId, _setNodeId)