pyecs

pyecs.git
git clone git://git.lenczewski.org/pyecs.git
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common.py (2636B)

      1 import json
      2 import os
      3 
      4 from enum import Enum
      5 
      6 
      7 WIDTH, HEIGHT = 500, 800
      8 
      9 HELP_CONTENTS = (
     10                 'Controls:\n'
     11                 'w: move player ship up\n'
     12                 'a: move player ship left\n'
     13                 's: move player ship down\n'
     14                 'd: move player ship right\n'
     15                 'j: primary attack\n'
     16                 'k: secondary attack\n'
     17                 'Escape: pause menu\n'
     18                 'Space: boss key'
     19                 )
     20 
     21 BOSS_KEY_IMAGE_FPATH = 'assets/out/boss_image_v2.gif'
     22 SCORE_FPATH = 'scores.scr'
     23 
     24 STATE_FPATH = 'state.stt'
     25 
     26 
     27 def gamestate_is_valid(state):
     28     if state is None or \
     29         state.get('score', None) is None or state.get('lives', None) is None:
     30         return False
     31 
     32     return True
     33 
     34 
     35 def pack_gamestate(score, lives):
     36     if score is None or lives is None:
     37         return None
     38 
     39     return {'score': int(score), 'lives': int(lives)}
     40 
     41 
     42 def load_gamestate(fpath):
     43     if not os.path.isfile(fpath):
     44         return None
     45 
     46     try:
     47         with open(fpath, 'r') as f:
     48             serialised = f.read()
     49             d = json.loads(serialised)
     50 
     51             score = d.get('score', None)
     52             lives = d.get('lives', None)
     53 
     54             return pack_gamestate(score, lives)
     55 
     56     except Exception as err:
     57         print(err)
     58 
     59     return None
     60 
     61 
     62 def save_gamestate(fpath, score, lives):
     63     with open(fpath, 'w') as f:
     64         serialised = json.dumps(pack_gamestate(score, lives))
     65         f.write(f'{serialised}\n')
     66 
     67 
     68 BLACK = '#000000'
     69 WHITE = '#ffffff'
     70 RED = '#ff0000'
     71 YELLOW = '#ffff00'
     72 GREEN = '#00ff00'
     73 CYAN = '#00ffff'
     74 BLUE = '#0000ff'
     75 MAGENTA = '#ff00ff'
     76 
     77 #SEVERITY = 2 ## turns off no messages
     78 #SEVERITY = 1 ## turns off debug messages
     79 #SEVERITY = 0 ## turns off debug and warning messages
     80 SEVERITY = -1 ## turns off all messages
     81 
     82 
     83 def debug(msg):
     84     if SEVERITY >= 2:
     85         print(f'DEBUG: {msg}')
     86 
     87 
     88 def warn(msg):
     89     if SEVERITY >= 1:
     90         print(f'WARNING: {msg}')
     91 
     92 
     93 def critical(msg):
     94     if SEVERITY >= 0:
     95         print(f'!!!CRITICAL!!!: {msg}')
     96 
     97 
     98 class AutoId:
     99     """
    100     Implements a stateful decorator to assign each decorated class a unique id.
    101     """
    102     _component_id = 0
    103     _system_id = 0
    104 
    105 
    106     @classmethod
    107     def component(cls, wrapped_cls):
    108         wrapped_cls.cid = cls._component_id
    109         cls._component_id += 1
    110 
    111         return wrapped_cls
    112 
    113 
    114     @classmethod
    115     def system(cls, wrapped_cls):
    116         wrapped_cls.sid = cls._system_id
    117         cls._system_id += 1
    118 
    119         return wrapped_cls
    120 
    121 
    122 class EcsContinuation(Enum):
    123     """
    124     Whether the ECS system should continue to the next iteration or stop.
    125     """
    126     Stop = 0
    127     Continue = 1
    128