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python-roguelike/entity.py

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from __future__ import annotations
import copy
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import math
from typing import Optional, Tuple, Type, TypeVar, TYPE_CHECKING, Union
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from render_order import RenderOrder
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if TYPE_CHECKING:
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from components.ai import BaseAI
from components.consumable import Consumable
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from components.fighter import Fighter
from components.inventory import Inventory
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from components.level import Level
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from game_map import GameMap
T = TypeVar("T", bound="Entity")
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class Entity:
"""
A generic object to represent players, enemies, items, etc.
"""
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parent: Union[GameMap, Inventory]
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def __init__(
self,
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parent: Optional[GameMap] = None,
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x: int = 0,
y: int = 0,
char: str = "?",
color: Tuple[int, int, int] = (255, 255, 255),
name: str = "<Unnamed>",
blocks_movement: bool = False,
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render_order: RenderOrder = RenderOrder.CORPSE,
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):
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self.x = x
self.y = y
self.char = char
self.color = color
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self.name = name
self.blocks_movement = blocks_movement
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self.render_order = render_order
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if parent:
# If gamemap isn't provided now, it will be later.
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self.parent = parent
parent.entities.add(self)
@property
def gamemap(self) -> GameMap:
return self.parent.gamemap
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def spawn(self: T, gamemap: GameMap, x: int, y: int) -> T:
"""Spawn a copy of this instance at the given location."""
clone = copy.deepcopy(self)
clone.x = x
clone.y = y
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clone.parent = gamemap
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gamemap.entities.add(clone)
return clone
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def place(self, x: int, y: int, gamemap: Optional[GameMap] = None) -> None:
"""Place this entity at a new location. Handles moving across GameMaps."""
self.x = x
self.y = y
if gamemap:
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if hasattr(self, "parent"): # Possibly uninitialized
if self.parent is self.gamemap:
self.gamemap.entities.remove(self)
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self.parent = gamemap
gamemap.entities.add(self)
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def distance(self, x: int, y: int) -> float:
"""
Return the distance between the current entity and the given (x,y) coordinate.
"""
return math.sqrt((x - self.x) ** 2 + (y - self.y) ** 2)
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def move(self, dx: int, dy: int):
# Move the entity by a given amount
self.x += dx
self.y += dy
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class Actor(Entity):
def __init__(
self,
*,
x: int = 0,
y: int = 0,
char: str = "?",
color: Tuple[int, int, int] = (255, 255, 255),
name: str = "<Unamed>",
ai_cls: Type[BaseAI],
fighter: Fighter,
inventory: Inventory,
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level: Level
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):
super().__init__(
x=x,
y=y,
char=char,
color=color,
name=name,
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blocks_movement=True,
render_order=RenderOrder.ACTOR,
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)
self.ai: Optional[BaseAI] = ai_cls(self)
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self.fighter = fighter
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self.fighter.parent = self
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self.inventory = inventory
self.inventory.parent = self
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self.level = level
self.level.parent = self
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@property
def is_alive(self) -> bool:
"""Returns True as long as this actor can perform actions."""
return bool(self.ai)
class Item(Entity):
def __init__(
self,
*,
x: int = 0,
y: int = 0,
char: str = "?",
color: Tuple[int, int, int] = (255, 255, 255),
name: str = "<Unamed>",
consumable: Consumable,
):
super().__init__(
x=x,
y=y,
char=char,
color=color,
name=name,
blocks_movement=False,
render_order=RenderOrder.ITEM,
)
self.consumable = consumable
self.consumable.parent = self