gameobjects.py

   1 # object classes - classes for game interactive objects
   2 import pygame
   3 import os.path
   4
   5 import utility
   6
   7 # base class for all objects
   8 class GameObject:
   9         # initialization routine
  10         def __init__ (self, row, col, text, image = None, can_pickup = True):
  11                 self.row = row
  12                 self.col = col
  13                 self.image = image
  14                 self.text = text
  15                 self.can_pickup = can_pickup
  16
  17         # override this for interaction, i.e. when character walks into the item
  18         def interact (self):
  19                 # always return True if the object is interacted with
  20                 # return False to make the object block the player from
  21                 # moving over it
  22                 return True
  23
  24         # use the object on another object
  25         def use (self, otherobject):
  26                 pass
  27
  28 class GoldCoins (GameObject):
  29         # initialize
  30         def __init__ (self, row, col, image, value):
  31                 text = "gold coins"
  32                 self.value = value
  33                 GameObject.__init__ (self, row, col, text, image, False)
  34
  35         # no interaction with this object
  36         def interact (self):
  37                 return True
  38
  39         # use the object on Butaba - add to his gold
  40         def use (self, butaba):
  41                 butaba.gold += self.value
  42
  43
  44 class HealthPotion (GameObject):
  45         # initialize
  46         def __init__ (self, row, col, image):
  47                 text = "health potion"
  48                 GameObject.__init__ (self, row, col, text, image, True)
  49
  50         # no interaction with this object
  51         def interact (self):
  52                 return True
  53
  54         # using the potion
  55         def use (self, butaba):
  56                 butaba.health += 25
  57                 if butaba.health > butaba.MAXHEALTH:
  58                         butaba.health = butaba.MAXHEALTH
  59
  60 class Chest (GameObject):
  61         def __init__ (self, row, col, text, image, key_id, locked = False, items = []):
  62                 self.key_id = key_id
  63                 self.locked = locked
  64                 self.items = items
  65                 GameObject.__init__ (self, row, col, text, image, False)
  66
  67         # no interaction with this object. Also solid so return False
  68         def interact (self):
  69                 # object is solid
  70                 return False
  71
  72         # try to use the key passed to it
  73         def use (self, key):
  74                 # if chest is locked try to unlock it
  75                 if self.locked is True:
  76                         # if the item is a key
  77                         if isinstance (key, Key):
  78                                 # if the key fits the lock
  79                                 # unlock the chest
  80                                 if key.key_id == self.key_id:
  81                                         self.locked = False
  82                                         # return the key
  83                                         return key
  84                         # return None if not a key or key did not fit
  85                         return None
  86                 else:
  87                         return self.locked
  88
  89 class Key (GameObject):
  90         def __init__ (self, row, col, text, image, key_id):
  91                 self.key_id = key_id
  92                 GameObject.__init__ (self, row, col, text, image, True)
  93
  94         # no interaction with this object
  95         def interact (self):
  96                 # key is not a solid object so return True
  97                 return True
  98
  99         # using the key - this is relegated to the locked item for
 100         # convenience, so key does nothing by defaults
 101         def use (self, lockitem):
 102                 pass