Eryn Wells
7e00f58a40
The base class Actor doesn't declare a (optional) actor attribute. The ActionWithActor has a non-optional actor attribute. This makes the type checker happier, and means we can have some actions that don't have actors.
219 lines
7 KiB
Python
219 lines
7 KiB
Python
# Eryn Wells <eryn@erynwells.me>
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'''Defines a number of high-level game objects. The parent class of all game objects is the Entity class.'''
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from enum import Enum
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from typing import TYPE_CHECKING, Optional, Tuple, Type
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import tcod
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from . import items
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from .components import Fighter
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from .geometry import Point
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from .monsters import Species
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if TYPE_CHECKING:
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from .ai import AI
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class RenderOrder(Enum):
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'''
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These values indicate the order that an Entity should be rendered. Higher values are rendered later and therefore on
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top of items with lower orderings.
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'''
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ITEM = 1000
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ACTOR = 2000
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HERO = 3000
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class Entity:
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'''A single-tile drawable entity with a symbol and position
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Attributes
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----------
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identifier : int
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A numerical value that uniquely identifies this entity across the entire game
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position : Point
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The Entity's location on the map
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foreground : Tuple[int, int, int]
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The foreground color used to render this Entity
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background : Tuple[int, int, int], optional
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The background color used to render this Entity
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symbol : str
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A single character string that represents this character on the map
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blocks_movement : bool
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True if this Entity blocks other Entities from moving through its position
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render_order : RenderOrder
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One of the RenderOrder values that specifies a layer at which this entity will be rendered. Higher values are
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rendered on top of lower values.
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'''
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# A monotonically increasing identifier to help differentiate between entities that otherwise look identical
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__next_identifier = 1
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def __init__(
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self,
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symbol: str,
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*,
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position: Optional[Point] = None,
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blocks_movement: Optional[bool] = True,
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render_order: RenderOrder = RenderOrder.ITEM,
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fg: Optional[Tuple[int, int, int]] = None,
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bg: Optional[Tuple[int, int, int]] = None):
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self.identifier = Entity.__next_identifier
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self.position = position if position else Point()
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self.foreground = fg if fg else (255, 255, 255)
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self.background = bg
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self.symbol = symbol
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self.blocks_movement = blocks_movement
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self.render_order = render_order
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Entity.__next_identifier += 1
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def print_to_console(self, console: tcod.Console) -> None:
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'''Render this Entity to the console'''
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console.print(x=self.position.x, y=self.position.y, string=self.symbol, fg=self.foreground, bg=self.background)
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def __str__(self) -> str:
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return f'{self.symbol}!{self.identifier} at {self.position}'
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def __repr__(self) -> str:
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return f'{self.__class__.__name__}({self.symbol!r}, position={self.position!r}, fg={self.foreground!r}, bg={self.background!r})'
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class Actor(Entity):
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'''
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An actor is an abstract class that defines an object that can act in the game world. Entities that are actors will
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be allowed an opportunity to perform an action during each game turn.
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Attributes
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----------
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ai : AI, optional
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If an entity can act on its own behalf, an instance of an AI class
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fighter : Fighter, optional
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If an entity can fight or take damage, an instance of the Fighter class. This is where hit points, attack power,
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defense power, etc live.
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'''
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def __init__(
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self,
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symbol: str,
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*,
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position: Optional[Point] = None,
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blocks_movement: Optional[bool] = True,
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render_order: RenderOrder = RenderOrder.ACTOR,
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ai: Optional['AI'] = None,
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fighter: Optional[Fighter] = None,
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fg: Optional[Tuple[int, int, int]] = None,
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bg: Optional[Tuple[int, int, int]] = None):
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super().__init__(
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symbol,
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position=position,
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blocks_movement=blocks_movement,
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fg=fg,
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bg=bg,
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render_order=render_order)
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# Components
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self.ai = ai
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self.fighter = fighter
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@property
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def name(self) -> str:
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'''The name of this actor. This is a player-visible string.'''
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return 'Actor'
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@property
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def sight_radius(self) -> int:
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'''The number of tiles this entity can see around itself'''
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return 0
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@property
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def yields_corpse_on_death(self) -> bool:
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'''True if this Actor should produce a corpse when it dies'''
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return False
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def __repr__(self) -> str:
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return f'{self.__class__.__name__}({self.symbol!r}, position={self.position!r}, fighter={self.fighter!r}, ai={self.ai!r}, fg={self.foreground!r}, bg={self.background!r})'
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class Hero(Actor):
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'''The hero, the player character'''
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def __init__(self, position: Point):
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super().__init__(
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'@',
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position=position,
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fighter=Fighter(maximum_hit_points=30, attack_power=5, defense=2),
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render_order=RenderOrder.HERO,
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fg=tuple(tcod.white))
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@property
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def name(self) -> str:
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return 'Hero'
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@property
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def sight_radius(self) -> int:
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# TODO: Make this configurable
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return 8
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def __str__(self) -> str:
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assert self.fighter
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return f'Hero!{self.identifier} at {self.position} with {self.fighter.hit_points}/{self.fighter.maximum_hit_points} hp'
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class Monster(Actor):
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'''An instance of a Species'''
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def __init__(self, species: Species, ai_class: Type['AI'], position: Optional[Point] = None):
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fighter = Fighter(
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maximum_hit_points=species.maximum_hit_points,
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attack_power=species.attack_power,
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defense=species.defense)
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super().__init__(
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species.symbol,
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ai=ai_class(self),
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position=position,
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fighter=fighter,
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fg=species.foreground_color,
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bg=species.background_color)
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self.species = species
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@property
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def name(self) -> str:
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return self.species.name
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@property
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def sight_radius(self) -> int:
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return self.species.sight_radius
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@property
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def yields_corpse_on_death(self) -> bool:
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return True
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def __str__(self) -> str:
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assert self.fighter
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return f'{self.name}!{self.identifier} with {self.fighter.hit_points}/{self.fighter.maximum_hit_points} hp at {self.position}'
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class Item(Entity):
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'''An instance of an Item'''
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def __init__(self, kind: items.Item, position: Optional[Point] = None, name: Optional[str] = None):
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super().__init__(kind.symbol,
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position=position,
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blocks_movement=False,
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render_order=RenderOrder.ITEM,
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fg=kind.foreground_color,
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bg=kind.background_color)
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self.kind = kind
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self._name = name
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@property
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def name(self) -> str:
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'''The name of the item'''
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if self._name:
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return self._name
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return self.kind.name
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