1 | import pymunk
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2 | import pymunk.pygame_util
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3 |
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4 | import math
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5 |
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6 | from nagslang import environment
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7 | from nagslang import puzzle
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8 | from nagslang import render
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9 | from nagslang.mutators import FLIP_H, ImageOverlay
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10 | from nagslang.constants import (
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11 | COLLISION_TYPE_DOOR, COLLISION_TYPE_FURNITURE, COLLISION_TYPE_PROJECTILE,
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12 | COLLISION_TYPE_SWITCH, COLLISION_TYPE_SHEEP, COLLISION_TYPE_SHEEP_PEN,
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13 | COLLISION_TYPE_WEREWOLF_ATTACK, SWITCH_PUSHERS, ZORDER_FLOOR, ZORDER_LOW,
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14 | ZORDER_HIGH)
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15 | from nagslang.resources import resources
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16 | from nagslang.events import DoorEvent
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17 |
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18 |
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19 | class Result(object):
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20 | '''
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21 | Return from an update() function, to add new objects to the world, and/or
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22 | remove old objects.
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23 | '''
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24 | def __init__(self, add=(), remove=()):
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25 | self.add = add
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26 | self.remove = remove
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27 |
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28 | def merge(self, result):
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29 | if result is not None:
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30 | self.add += result.add
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31 | self.remove += result.remove
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32 | return self
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33 |
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34 |
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35 | def get_editable_game_objects():
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36 | classes = []
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37 | for cls_name, cls in globals().iteritems():
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38 | if isinstance(cls, type) and hasattr(cls, 'requires'):
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39 | classes.append((cls_name, cls))
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40 | return classes
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41 |
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42 |
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43 | class Physicser(object):
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44 | def __init__(self, space):
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45 | self._space = space
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46 |
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47 | def get_space(self):
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48 | return self._space
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49 |
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50 | def set_space(self, new_space):
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51 | self._space = new_space
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52 |
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53 | def set_game_object(self, game_object):
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54 | self.game_object = game_object
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55 |
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56 | def get_shape(self):
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57 | raise NotImplementedError()
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58 |
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59 | def add_to_space(self):
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60 | shape = self.get_shape()
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61 | self.get_space().add(shape)
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62 | if not shape.body.is_static:
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63 | self.get_space().add(shape.body)
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64 |
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65 | def remove_from_space(self):
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66 | shape = self.get_shape()
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67 | self.get_space().remove(shape)
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68 | if not shape.body.is_static:
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69 | self.get_space().remove(shape.body)
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70 |
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71 | def get_render_position(self, surface):
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72 | pos = self.get_shape().body.position
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73 | return pymunk.pygame_util.to_pygame(pos, surface)
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74 |
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75 | def get_angle(self):
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76 | return self.get_shape().body.angle
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77 |
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78 | def get_velocity(self):
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79 | return self.get_shape().body.velocity
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80 |
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81 | def _get_position(self):
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82 | return self.get_shape().body.position
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83 |
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84 | def _set_position(self, position):
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85 | self.get_shape().body.position = position
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86 |
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87 | position = property(_get_position, _set_position)
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88 |
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89 | def apply_impulse(self, j, r=(0, 0)):
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90 | return self.get_shape().body.apply_impulse(j, r)
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91 |
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92 |
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93 | class SingleShapePhysicser(Physicser):
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94 | def __init__(self, space, shape):
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95 | super(SingleShapePhysicser, self).__init__(space)
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96 | self._shape = shape
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97 | shape.physicser = self
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98 |
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99 | def get_shape(self):
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100 | return self._shape
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101 |
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102 |
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103 | class MultiShapePhysicser(Physicser):
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104 | def __init__(self, space, shape, *extra_shapes):
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105 | super(MultiShapePhysicser, self).__init__(space)
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106 | self._shape = shape
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107 | self._extra_shapes = extra_shapes
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108 | shape.physicser = self
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109 |
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110 | def get_shape(self):
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111 | return self._shape
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112 |
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113 | def add_to_space(self):
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114 | shape = self.get_shape()
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115 | self.get_space().add(shape)
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116 | if not shape.body.is_static:
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117 | self.get_space().add(shape.body)
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118 | for s in self._extra_shapes:
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119 | self.get_space().add(s)
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120 |
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121 | def remove_from_space(self):
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122 | shape = self.get_shape()
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123 | self.get_space().remove(shape)
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124 | if not shape.body.is_static:
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125 | self.get_space().remove(shape.body)
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126 | for s in self._extra_shapes:
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127 | self.get_space().remove(s)
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128 |
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129 |
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130 | def damping_velocity_func(body, gravity, damping, dt):
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131 | """Apply custom damping to this body's velocity.
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132 | """
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133 | damping = getattr(body, 'damping', damping)
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134 | return pymunk.Body.update_velocity(body, gravity, damping, dt)
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135 |
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136 |
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137 | def make_body(mass, moment, position, damping=None):
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138 | body = pymunk.Body(mass, moment)
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139 | body.position = tuple(position)
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140 | if damping is not None:
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141 | body.damping = damping
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142 | body.velocity_func = damping_velocity_func
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143 | return body
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144 |
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145 |
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146 | class GameObject(object):
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147 | """A representation of a thing in the game world.
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148 |
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149 | This has a rendery thing, physicsy things and maybe some other things.
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150 | """
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151 |
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152 | zorder = ZORDER_LOW
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153 | is_moving = False # `True` if a movement animation should play.
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154 |
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155 | def __init__(self, physicser, renderer, puzzler=None, overlay=None,
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156 | interactible=None):
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157 | self.lifetime = 0
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158 | self.physicser = physicser
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159 | physicser.set_game_object(self)
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160 | self.physicser.add_to_space()
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161 | self.renderer = renderer
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162 | renderer.set_game_object(self)
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163 | self.puzzler = puzzler
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164 | if puzzler is not None:
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165 | puzzler.set_game_object(self)
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166 | self.overlay = overlay
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167 | if overlay is not None:
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168 | self.overlay.set_game_object(self)
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169 | self.interactible = interactible
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170 | if interactible is not None:
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171 | self.interactible.set_game_object(self)
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172 | self._timers = {}
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173 | self._active_timers = {}
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174 |
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175 | def add_timer(self, name, secs):
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176 | self._timers[name] = secs
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177 |
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178 | def start_timer(self, name, secs=None):
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179 | if secs is None:
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180 | secs = self._timers[name]
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181 | self._active_timers[name] = secs
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182 |
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183 | def check_timer(self, name):
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184 | return name in self._active_timers
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185 |
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186 | def set_stored_state_dict(self, stored_state):
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187 | """Override this to set up whatever state storage you want.
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188 |
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189 | The `stored_state` dict passed in contains whatever saved state we
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190 | might have for this object. If the return value of this method
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191 | evaluates to `True`, the contents of the `stored_state` dict will be
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192 | saved, otherwise it will be discarded.
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193 | """
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194 | pass
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195 |
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196 | def get_space(self):
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197 | return self.physicser.get_space()
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198 |
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199 | def get_shape(self):
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200 | return self.physicser.get_shape()
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201 |
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202 | def get_render_position(self, surface):
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203 | return self.physicser.get_render_position(surface)
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204 |
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205 | def get_render_angle(self):
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206 | return self.physicser.get_angle()
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207 |
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208 | def get_facing_direction(self):
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209 | """Used by rendererd that care what direction an object is facing.
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210 | """
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211 | return None
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212 |
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213 | def render(self, surface):
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214 | return self.renderer.render(surface)
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215 |
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216 | def update(self, dt):
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217 | self.lifetime += dt
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218 | for timer in self._active_timers.keys():
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219 | self._active_timers[timer] -= dt
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220 | if self._active_timers[timer] <= 0:
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221 | self._active_timers.pop(timer)
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222 | self.renderer.update(dt)
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223 |
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224 | def hit(self, weapon):
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225 | '''Was hit with a weapon (such as a bullet)'''
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226 | pass
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227 |
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228 | def collide_with_protagonist(self, protagonist):
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229 | """Called as a `pre_solve` collision callback with the protagonist.
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230 |
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231 | You can return `False` to ignore the collision, anything else
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232 | (including `None`) to process the collision as normal.
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233 | """
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234 | return True
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235 |
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236 | def collide_with_furniture(self, furniture):
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237 | return True
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238 |
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239 | def collide_with_claw_attack(self, claw_attack):
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240 | return True
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241 |
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242 | def environmental_movement(self, vec):
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243 | self.physicser.apply_impulse(vec)
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244 |
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245 | @classmethod
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246 | def requires(cls):
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247 | """Hints for the level editor"""
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248 | return [("name", "string")]
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249 |
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250 |
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251 | class FloorSwitch(GameObject):
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252 | zorder = ZORDER_FLOOR
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253 |
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254 | def __init__(self, space, position):
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255 | body = make_body(None, None, position)
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256 | self.shape = pymunk.Circle(body, 30)
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257 | self.shape.collision_type = COLLISION_TYPE_SWITCH
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258 | self.shape.sensor = True
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259 | super(FloorSwitch, self).__init__(
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260 | SingleShapePhysicser(space, self.shape),
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261 | render.ImageStateRenderer({
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262 | True: resources.get_image('objects', 'sensor_on.png'),
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263 | False: resources.get_image('objects', 'sensor_off.png'),
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264 | }),
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265 | puzzle.CollidePuzzler(*SWITCH_PUSHERS),
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266 | )
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267 |
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268 | @classmethod
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269 | def requires(cls):
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270 | return [("name", "string"), ("position", "coordinates")]
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271 |
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272 |
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273 | class Note(GameObject):
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274 | zorder = ZORDER_FLOOR
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275 |
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276 | def __init__(self, space, position, message):
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277 | body = make_body(None, None, position)
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278 | self.shape = pymunk.Circle(body, 30)
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279 | self.shape.sensor = True
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280 | super(Note, self).__init__(
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281 | SingleShapePhysicser(space, self.shape),
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282 | render.ImageRenderer(resources.get_image('objects', 'note.png')),
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283 | puzzle.CollidePuzzler(),
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284 | render.TextOverlay(message),
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285 | )
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286 |
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287 | @classmethod
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288 | def requires(cls):
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289 | return [("name", "string"), ("position", "coordinates"),
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290 | ("message", "text")]
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291 |
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292 |
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293 | class FloorLight(GameObject):
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294 | zorder = ZORDER_FLOOR
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295 |
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296 | def __init__(self, space, position, state_source):
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297 | body = make_body(None, None, position)
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298 | self.shape = pymunk.Circle(body, 10)
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299 | self.shape.collision_type = COLLISION_TYPE_SWITCH
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300 | self.shape.sensor = True
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301 | super(FloorLight, self).__init__(
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302 | SingleShapePhysicser(space, self.shape),
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303 | render.ImageStateRenderer({
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304 | True: resources.get_image('objects', 'light_on.png'),
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305 | False: resources.get_image('objects', 'light_off.png'),
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306 | }),
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307 | puzzle.StateProxyPuzzler(state_source),
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308 | )
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309 |
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310 | @classmethod
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311 | def requires(cls):
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312 | return [("name", "string"), ("position", "coordinates"),
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313 | ("state_source", "puzzler")]
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314 |
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315 |
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316 | class Box(GameObject):
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317 | def __init__(self, space, position):
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318 | body = make_body(10, 10000, position, damping=0.5)
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319 | self.shape = pymunk.Poly(
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320 | body, [(-20, -20), (20, -20), (20, 20), (-20, 20)])
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321 | self.shape.friction = 0.5
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322 | self.shape.collision_type = COLLISION_TYPE_FURNITURE
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323 | super(Box, self).__init__(
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324 | SingleShapePhysicser(space, self.shape),
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325 | render.ImageRenderer(resources.get_image('objects', 'crate.png')),
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326 | )
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327 |
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328 | @classmethod
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329 | def requires(cls):
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330 | return [("name", "string"), ("position", "coordinates"),
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331 | ("state_source", "puzzler")]
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332 |
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333 |
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334 | class BaseDoor(GameObject):
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335 | zorder = ZORDER_FLOOR
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336 | is_open = True
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337 |
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338 | def __init__(self, space, position, destination, dest_pos, angle,
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339 | renderer, condition):
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340 | body = make_body(pymunk.inf, pymunk.inf, position, damping=0.5)
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341 | self.shape = pymunk.Circle(body, 30)
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342 | self.shape.collision_type = COLLISION_TYPE_DOOR
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343 | self.shape.body.angle = float(angle) / 180 * math.pi
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344 | self.shape.sensor = True
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345 | self.destination = destination
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346 | self.dest_pos = tuple(dest_pos)
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347 | super(BaseDoor, self).__init__(
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348 | SingleShapePhysicser(space, self.shape),
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349 | renderer,
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350 | puzzle.ParentAttrPuzzler('is_open'),
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351 | interactible=environment.Interactible(
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352 | environment.Action(self._post_door_event, condition)),
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353 | )
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354 |
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355 | def _post_door_event(self, protagonist):
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356 | DoorEvent.post(self.destination, self.dest_pos)
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357 |
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358 |
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359 | class Door(BaseDoor):
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360 | def __init__(self, space, position, destination, dest_pos, angle):
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361 | super(Door, self).__init__(
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362 | space, position, destination, dest_pos, angle,
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363 | render.ImageRenderer(resources.get_image('objects', 'door.png')),
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364 | environment.YesCondition(),
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365 | )
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366 |
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367 | @classmethod
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368 | def requires(cls):
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369 | return [("name", "string"), ("position", "coordinates"),
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370 | ("destination", "level name"), ("dest_pos", "coordinate"),
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371 | ("angle", "degrees")]
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372 |
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373 |
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374 | class RestartGameDoor(Door):
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375 | def _post_door_event(self, protagonist):
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376 | protagonist.world.reset()
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377 | super(RestartGameDoor, self)._post_door_event(protagonist)
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378 |
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379 |
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380 | class ContinueGameDoor(Door):
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381 | def _post_door_event(self, protagonist):
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382 | world = protagonist.world
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383 | DoorEvent.post(world.level[0], world.level[1])
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384 |
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385 |
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386 | class PuzzleDoor(BaseDoor):
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387 | def __init__(self, space, position, destination, dest_pos, angle,
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388 | key_state):
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389 | self._key_state = key_state
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390 | overlay = ImageOverlay(resources.get_image('objects', 'lock.png'))
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391 | super(PuzzleDoor, self).__init__(
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392 | space, position, destination, dest_pos, angle,
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393 | render.ImageStateRenderer({
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394 | True: resources.get_image('objects', 'door.png'),
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395 | False: resources.get_image(
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396 | 'objects', 'door.png', transforms=(overlay,)),
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397 | }),
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398 | environment.FunctionCondition(lambda p: self.is_open),
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399 | )
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400 |
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401 | @property
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402 | def is_open(self):
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403 | return self._stored_state['is_open']
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404 |
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405 | def set_stored_state_dict(self, stored_state):
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406 | self._stored_state = stored_state
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407 | self._stored_state.setdefault('is_open', False)
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408 | return True
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409 |
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410 | def update(self, dt):
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411 | if not self.is_open:
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412 | self._stored_state['is_open'] = self.puzzler.glue.get_state_of(
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413 | self._key_state)
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414 | super(PuzzleDoor, self).update(dt)
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415 |
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416 | @classmethod
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417 | def requires(cls):
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418 | return [("name", "string"), ("position", "coordinates"),
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419 | ("destination", "level name"), ("dest_pos", "coordinate"),
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420 | ("angle", "degrees"),
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421 | ("key_state", "puzzler")]
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422 |
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423 |
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424 | class KeyedDoor(BaseDoor):
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425 | def __init__(self, space, position, destination, dest_pos, angle,
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426 | key_item=None):
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427 | self._key_item = key_item
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428 | overlay = ImageOverlay(
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429 | resources.get_image('objects', '%s.png' % (key_item,)))
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430 | super(KeyedDoor, self).__init__(
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431 | space, position, destination, dest_pos, angle,
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432 | render.ImageRenderer(resources.get_image(
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433 | 'objects', 'door.png', transforms=(overlay,))),
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434 | environment.ItemRequiredCondition(key_item),
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435 | )
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436 |
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437 | @classmethod
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438 | def requires(cls):
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439 | return [("name", "string"), ("position", "coordinates"),
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440 | ("destination", "level name"), ("dest_pos", "coordinate"),
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441 | ("angle", "degrees"), ("key_item", "item name")]
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442 |
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443 |
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444 | class Bulkhead(GameObject):
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445 | zorder = ZORDER_FLOOR
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446 |
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447 | def __init__(self, space, end1, end2, key_state=None):
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448 | body = make_body(None, None, (0, 0))
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449 | self.shape = pymunk.Segment(body, tuple(end1), tuple(end2), 3)
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450 | self.shape.collision_type = COLLISION_TYPE_DOOR
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451 | if key_state is None:
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452 | puzzler = puzzle.YesPuzzler()
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453 | else:
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454 | puzzler = puzzle.StateProxyPuzzler(key_state)
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455 | super(Bulkhead, self).__init__(
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456 | SingleShapePhysicser(space, self.shape),
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457 | render.ShapeStateRenderer(),
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458 | puzzler,
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459 | )
|
---|
460 |
|
---|
461 | def collide_with_protagonist(self, protagonist):
|
---|
462 | if self.puzzler.get_state():
|
---|
463 | # Reject the collision, we can walk through.
|
---|
464 | return False
|
---|
465 | return True
|
---|
466 |
|
---|
467 | collide_with_furniture = collide_with_protagonist
|
---|
468 |
|
---|
469 | @classmethod
|
---|
470 | def requires(cls):
|
---|
471 | return [("name", "string"), ("end1", "coordinates"),
|
---|
472 | ("end2", "coordinates"), ("key_state", "puzzler")]
|
---|
473 |
|
---|
474 |
|
---|
475 | class ToggleSwitch(GameObject):
|
---|
476 | zorder = ZORDER_LOW
|
---|
477 |
|
---|
478 | def __init__(self, space, position):
|
---|
479 | body = make_body(None, None, position)
|
---|
480 | self.shape = pymunk.Circle(body, 20)
|
---|
481 | self.shape.sensor = True
|
---|
482 | super(ToggleSwitch, self).__init__(
|
---|
483 | SingleShapePhysicser(space, self.shape),
|
---|
484 | render.ImageStateRenderer({
|
---|
485 | True: resources.get_image('objects', 'lever.png'),
|
---|
486 | False: resources.get_image(
|
---|
487 | 'objects', 'lever.png', transforms=(FLIP_H,)),
|
---|
488 | }),
|
---|
489 | puzzle.ParentAttrPuzzler('toggle_on'),
|
---|
490 | interactible=environment.Interactible(
|
---|
491 | environment.Action(self._toggle)),
|
---|
492 | )
|
---|
493 |
|
---|
494 | @property
|
---|
495 | def toggle_on(self):
|
---|
496 | return self._stored_state['toggle_on']
|
---|
497 |
|
---|
498 | def _toggle(self, protagonist):
|
---|
499 | self._stored_state['toggle_on'] = not self.toggle_on
|
---|
500 |
|
---|
501 | def set_stored_state_dict(self, stored_state):
|
---|
502 | self._stored_state = stored_state
|
---|
503 | # We start in the "off" position.
|
---|
504 | self._stored_state.setdefault('toggle_on', False)
|
---|
505 | return True
|
---|
506 |
|
---|
507 | @classmethod
|
---|
508 | def requires(cls):
|
---|
509 | return [("name", "string"), ("position", "coordinates")]
|
---|
510 |
|
---|
511 |
|
---|
512 | class Bullet(GameObject):
|
---|
513 | def __init__(self, space, position, impulse, damage, bullet_type,
|
---|
514 | source_collision_type):
|
---|
515 | body = make_body(1, pymunk.inf, position)
|
---|
516 | body.angle = impulse.angle
|
---|
517 | self.last_position = position
|
---|
518 | self.shape = pymunk.Circle(body, 2)
|
---|
519 | self.shape.sensor = True
|
---|
520 | self.shape.collision_type = COLLISION_TYPE_PROJECTILE
|
---|
521 | self.damage = damage
|
---|
522 | self.type = bullet_type
|
---|
523 | self.source_collision_type = source_collision_type
|
---|
524 | super(Bullet, self).__init__(
|
---|
525 | SingleShapePhysicser(space, self.shape),
|
---|
526 | render.ImageRenderer(resources.get_image(
|
---|
527 | 'objects', '%s.png' % self.type)),
|
---|
528 | )
|
---|
529 | self.physicser.apply_impulse(impulse)
|
---|
530 |
|
---|
531 | def update(self, dt):
|
---|
532 | super(Bullet, self).update(dt)
|
---|
533 | position = (self.physicser.position.x, self.physicser.position.y)
|
---|
534 | r = self.get_space().segment_query(self.last_position, position)
|
---|
535 | self.last_position = position
|
---|
536 | for collision in r:
|
---|
537 | shape = collision.shape
|
---|
538 | if (shape.collision_type == self.source_collision_type
|
---|
539 | or shape == self.physicser.get_shape()
|
---|
540 | or shape.sensor):
|
---|
541 | continue
|
---|
542 | if hasattr(shape, 'physicser'):
|
---|
543 | shape.physicser.game_object.hit(self)
|
---|
544 | self.physicser.remove_from_space()
|
---|
545 | return Result(remove=[self])
|
---|
546 |
|
---|
547 |
|
---|
548 | class ClawAttack(GameObject):
|
---|
549 | def __init__(self, space, pos, vector, damage):
|
---|
550 | body = make_body(1, pymunk.inf,
|
---|
551 | (pos[0] + (vector.length * math.cos(vector.angle)),
|
---|
552 | pos[1] + (vector.length * math.sin(vector.angle))))
|
---|
553 | body.angle = vector.angle
|
---|
554 | self.shape = pymunk.Circle(body, 30)
|
---|
555 | self.shape.sensor = True
|
---|
556 | self.shape.collision_type = COLLISION_TYPE_WEREWOLF_ATTACK
|
---|
557 | self.damage = damage
|
---|
558 | super(ClawAttack, self).__init__(
|
---|
559 | SingleShapePhysicser(space, self.shape),
|
---|
560 | render.ImageRenderer(resources.get_image(
|
---|
561 | 'objects', 'werewolf_SW_claw_attack.png',
|
---|
562 | transforms=(FLIP_H,))),
|
---|
563 | )
|
---|
564 |
|
---|
565 | def update(self, dt):
|
---|
566 | super(ClawAttack, self).update(dt)
|
---|
567 | if self.lifetime > 0.1:
|
---|
568 | self.physicser.remove_from_space()
|
---|
569 | return Result(remove=[self])
|
---|
570 |
|
---|
571 |
|
---|
572 | class HostileTerrain(GameObject):
|
---|
573 | zorder = ZORDER_FLOOR
|
---|
574 | damage = None
|
---|
575 | tiles = []
|
---|
576 | tile_alpha = 255
|
---|
577 | tile_frame_ticks = 3
|
---|
578 | # How often to hit the player
|
---|
579 | rate = 5
|
---|
580 |
|
---|
581 | def __init__(self, space, position, outline):
|
---|
582 | body = make_body(10, pymunk.inf, position)
|
---|
583 | # Adjust shape relative to position
|
---|
584 | shape_outline = [(p[0] - position[0], p[1] - position[1]) for
|
---|
585 | p in outline]
|
---|
586 | self.shape = pymunk.Poly(body, shape_outline)
|
---|
587 | self._ticks = 0
|
---|
588 | self.shape.collision_type = COLLISION_TYPE_SWITCH
|
---|
589 | self.shape.sensor = True
|
---|
590 | if len(self.tiles) > 1:
|
---|
591 | tile_images = [resources.get_image('tiles', x)
|
---|
592 | for x in self.tiles]
|
---|
593 | renderer = render.TimedTiledRenderer(outline, tile_images,
|
---|
594 | self.tile_frame_ticks,
|
---|
595 | self.tile_alpha)
|
---|
596 | else:
|
---|
597 | tile_image = resources.get_image('tiles', self.tiles[0])
|
---|
598 | renderer = render.TiledRenderer(outline, tile_image,
|
---|
599 | self.tile_alpha)
|
---|
600 | super(HostileTerrain, self).__init__(
|
---|
601 | SingleShapePhysicser(space, self.shape),
|
---|
602 | renderer)
|
---|
603 |
|
---|
604 | def collide_with_protagonist(self, protagonist):
|
---|
605 | # We're called every frame we're colliding, so
|
---|
606 | # There are timing issues with stepping on and
|
---|
607 | # off terrian, but as long as the rate is reasonably
|
---|
608 | # low, they shouldn't impact gameplay
|
---|
609 | if self._ticks == 0:
|
---|
610 | self.apply_effect(protagonist)
|
---|
611 | self._ticks += 1
|
---|
612 | if self._ticks > self.rate:
|
---|
613 | self._ticks = 0
|
---|
614 |
|
---|
615 | def apply_effect(self, protagonist):
|
---|
616 | protagonist.lose_health(self.damage)
|
---|
617 |
|
---|
618 | @classmethod
|
---|
619 | def requires(cls):
|
---|
620 | return [("name", "string"), ("position", "coordinates"),
|
---|
621 | ("outline", "polygon (convex)")]
|
---|
622 |
|
---|
623 |
|
---|
624 | class AcidFloor(HostileTerrain):
|
---|
625 | damage = 1
|
---|
626 | tiles = ['acid.png', 'acid2.png', 'acid3.png']
|
---|
627 | tile_alpha = 200
|
---|
628 | tile_frame_ticks = 10
|
---|
629 |
|
---|
630 |
|
---|
631 | class ForceWolfFloor(HostileTerrain):
|
---|
632 | tiles = ['moonlight.png']
|
---|
633 | rate = 0
|
---|
634 | tile_alpha = 150
|
---|
635 | zorder = ZORDER_HIGH
|
---|
636 |
|
---|
637 | def apply_effect(self, protagonist):
|
---|
638 | protagonist.force_wolf_form()
|
---|
639 |
|
---|
640 |
|
---|
641 | class GravityWell(GameObject):
|
---|
642 | zorder = ZORDER_FLOOR
|
---|
643 | # How often to hit the player
|
---|
644 | rate = 5
|
---|
645 |
|
---|
646 | def __init__(self, space, position, radius, force):
|
---|
647 | body = make_body(None, None, position)
|
---|
648 | # Adjust shape relative to position
|
---|
649 | self._radius = radius
|
---|
650 | self.shape = pymunk.Circle(body, radius)
|
---|
651 | self.centre = pymunk.Circle(body, 10)
|
---|
652 | self.centre.friction = pymunk.inf
|
---|
653 | self._ticks = 0
|
---|
654 | self.force = force
|
---|
655 | self.shape.collision_type = COLLISION_TYPE_SWITCH
|
---|
656 | self.shape.sensor = True
|
---|
657 | super(GravityWell, self).__init__(
|
---|
658 | MultiShapePhysicser(space, self.shape, self.centre),
|
---|
659 | render.ImageRenderer(resources.get_image(
|
---|
660 | 'objects', 'gravity_well.png')),
|
---|
661 | )
|
---|
662 |
|
---|
663 | def collide_with_protagonist(self, protagonist):
|
---|
664 | # We're called every frame we're colliding, so
|
---|
665 | # There are timing issues with stepping on and
|
---|
666 | # off terrian, but as long as the rate is reasonably
|
---|
667 | # low, they shouldn't impact gameplay
|
---|
668 | self.apply_effect(protagonist)
|
---|
669 |
|
---|
670 | def collide_with_furniture(self, furniture):
|
---|
671 | # We're called every frame we're colliding, so
|
---|
672 | # There are timing issues with stepping on and
|
---|
673 | # off terrian, but as long as the rate is reasonably
|
---|
674 | # low, they shouldn't impact gameplay
|
---|
675 | self.apply_effect(furniture)
|
---|
676 |
|
---|
677 | def apply_effect(self, object_to_move):
|
---|
678 | movement = self.physicser.position - object_to_move.physicser.position
|
---|
679 | local_force = self.force * (1 - (self._radius / movement.length))
|
---|
680 | movement.length = local_force
|
---|
681 | object_to_move.environmental_movement(-movement)
|
---|
682 |
|
---|
683 | @classmethod
|
---|
684 | def requires(cls):
|
---|
685 | return [("name", "string"), ("position", "coordinates"),
|
---|
686 | ("outline", "polygon (convex)")]
|
---|
687 |
|
---|
688 |
|
---|
689 | class SheepPen(GameObject):
|
---|
690 | zorder = ZORDER_FLOOR
|
---|
691 |
|
---|
692 | def __init__(self, space, position, outline, sheep_count):
|
---|
693 | body = make_body(None, None, position)
|
---|
694 | # Adjust shape relative to position
|
---|
695 | shape_outline = [(p[0] - position[0], p[1] - position[1]) for
|
---|
696 | p in outline]
|
---|
697 | self.shape = pymunk.Poly(body, shape_outline)
|
---|
698 | self.shape.collision_type = COLLISION_TYPE_SHEEP_PEN
|
---|
699 | self.shape.sensor = True
|
---|
700 | super(SheepPen, self).__init__(
|
---|
701 | SingleShapePhysicser(space, self.shape),
|
---|
702 | render.Renderer(),
|
---|
703 | puzzle.MultiCollidePuzzler(sheep_count, COLLISION_TYPE_SHEEP),
|
---|
704 | )
|
---|
705 |
|
---|
706 | @classmethod
|
---|
707 | def requires(cls):
|
---|
708 | return [("name", "string"), ("position", "coordinates"),
|
---|
709 | ("outline", "polygon (convex)"), ("sheep_count", "int")]
|
---|