400 lines
12 KiB
Python
400 lines
12 KiB
Python
#!/usr/bin/env python
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from enum import Enum, auto
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from math import sqrt
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from random import choice, randint
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from typing import List, Optional
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from squirrelbattle.display.texturepack import TexturePack
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class Map:
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"""
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Object that represents a Map with its width, height
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and tiles, that have their custom properties.
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"""
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width: int
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height: int
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start_y: int
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start_x: int
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tiles: List[List["Tile"]]
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entities: List["Entity"]
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# coordinates of the point that should be
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# on the topleft corner of the screen
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currentx: int
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currenty: int
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def __init__(self, width: int, height: int, tiles: list,
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start_y: int, start_x: int):
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self.width = width
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self.height = height
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self.start_y = start_y
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self.start_x = start_x
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self.tiles = tiles
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self.entities = []
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def add_entity(self, entity: "Entity") -> None:
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"""
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Register a new entity in the map.
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"""
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self.entities.append(entity)
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entity.map = self
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def remove_entity(self, entity: "Entity") -> None:
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"""
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Unregister an entity from the map.
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"""
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self.entities.remove(entity)
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def find_entities(self, entity_class: type) -> list:
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return [entity for entity in self.entities
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if isinstance(entity, entity_class)]
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def is_free(self, y: int, x: int) -> bool:
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"""
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Indicates that the case at the coordinates (y, x) is empty.
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"""
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return 0 <= y < self.height and 0 <= x < self.width and \
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self.tiles[y][x].can_walk() and \
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not any(entity.x == x and entity.y == y for entity in self.entities)
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@staticmethod
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def load(filename: str) -> "Map":
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"""
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Read a file that contains the content of a map, and build a Map object.
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"""
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with open(filename, "r") as f:
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file = f.read()
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return Map.load_from_string(file)
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@staticmethod
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def load_from_string(content: str) -> "Map":
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"""
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Load a map represented by its characters and build a Map object.
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"""
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lines = content.split("\n")
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first_line = lines[0]
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start_y, start_x = map(int, first_line.split(" "))
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lines = [line for line in lines[1:] if line]
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height = len(lines)
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width = len(lines[0])
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tiles = [[Tile.from_ascii_char(c)
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for x, c in enumerate(line)] for y, line in enumerate(lines)]
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return Map(width, height, tiles, start_y, start_x)
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@staticmethod
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def load_dungeon_from_string(content: str) -> List[List["Tile"]]:
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"""
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Transforms a string into the list of corresponding tiles
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"""
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lines = content.split("\n")
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tiles = [[Tile.from_ascii_char(c)
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for x, c in enumerate(line)] for y, line in enumerate(lines)]
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return tiles
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def draw_string(self, pack: TexturePack) -> str:
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"""
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Draw the current map as a string object that can be rendered
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in the window.
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"""
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return "\n".join("".join(tile.char(pack) for tile in line)
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for line in self.tiles)
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def spawn_random_entities(self, count: int) -> None:
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"""
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Put randomly {count} hedgehogs on the map, where it is available.
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"""
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for _ in range(count):
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y, x = 0, 0
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while True:
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y, x = randint(0, self.height - 1), randint(0, self.width - 1)
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tile = self.tiles[y][x]
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if tile.can_walk():
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break
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entity = choice(Entity.get_all_entity_classes())()
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entity.move(y, x)
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self.add_entity(entity)
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def tick(self) -> None:
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"""
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Trigger all entity events.
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"""
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for entity in self.entities:
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entity.act(self)
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def save_state(self) -> dict:
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"""
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Saves the map's attributes to a dictionary
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"""
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d = dict()
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d["width"] = self.width
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d["height"] = self.height
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d["start_y"] = self.start_y
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d["start_x"] = self.start_x
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d["currentx"] = self.currentx
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d["currenty"] = self.currenty
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d["entities"] = []
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for enti in self.entities:
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d["entities"].append(enti.save_state())
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d["map"] = self.draw_string(TexturePack.ASCII_PACK)
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return d
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def load_state(self, d: dict) -> None:
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"""
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Loads the map's attributes from a dictionary
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"""
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self.width = d["width"]
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self.height = d["height"]
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self.start_y = d["start_y"]
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self.start_x = d["start_x"]
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self.currentx = d["currentx"]
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self.currenty = d["currenty"]
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self.tiles = self.load_dungeon_from_string(d["map"])
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self.entities = []
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dictclasses = Entity.get_all_entity_classes_in_a_dict()
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for entisave in d["entities"]:
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self.add_entity(dictclasses[entisave["type"]](**entisave))
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class Tile(Enum):
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"""
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The internal representation of the tiles of the map
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"""
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EMPTY = auto()
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WALL = auto()
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FLOOR = auto()
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@staticmethod
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def from_ascii_char(ch: str) -> "Tile":
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"""
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Maps an ascii character to its equivalent in the texture pack
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"""
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for tile in Tile:
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if tile.char(TexturePack.ASCII_PACK) == ch:
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return tile
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raise ValueError(ch)
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def char(self, pack: TexturePack) -> str:
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"""
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Translates a Tile to the corresponding character according
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to the texture pack
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"""
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return getattr(pack, self.name)
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def is_wall(self) -> bool:
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"""
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Is this Tile a wall?
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"""
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return self == Tile.WALL
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def can_walk(self) -> bool:
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"""
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Check if an entity (player or not) can move in this tile.
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"""
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return not self.is_wall() and self != Tile.EMPTY
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class Entity:
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"""
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An Entity object represents any entity present on the map
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"""
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y: int
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x: int
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name: str
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map: Map
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# noinspection PyShadowingBuiltins
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def __init__(self, y: int = 0, x: int = 0, name: Optional[str] = None,
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map: Optional[Map] = None, *ignored, **ignored2):
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self.y = y
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self.x = x
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self.name = name
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self.map = map
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def check_move(self, y: int, x: int, move_if_possible: bool = False)\
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-> bool:
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"""
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Checks if moving to (y,x) is authorized
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"""
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free = self.map.is_free(y, x)
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if free and move_if_possible:
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self.move(y, x)
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return free
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def move(self, y: int, x: int) -> bool:
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"""
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Moves an entity to (y,x) coordinates
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"""
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self.y = y
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self.x = x
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return True
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def move_up(self, force: bool = False) -> bool:
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"""
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Moves the entity up one tile, if possible
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"""
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return self.move(self.y - 1, self.x) if force else \
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self.check_move(self.y - 1, self.x, True)
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def move_down(self, force: bool = False) -> bool:
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"""
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Moves the entity down one tile, if possible
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"""
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return self.move(self.y + 1, self.x) if force else \
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self.check_move(self.y + 1, self.x, True)
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def move_left(self, force: bool = False) -> bool:
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"""
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Moves the entity left one tile, if possible
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"""
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return self.move(self.y, self.x - 1) if force else \
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self.check_move(self.y, self.x - 1, True)
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def move_right(self, force: bool = False) -> bool:
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"""
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Moves the entity right one tile, if possible
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"""
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return self.move(self.y, self.x + 1) if force else \
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self.check_move(self.y, self.x + 1, True)
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def act(self, m: Map) -> None:
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"""
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Define the action of the entity that is ran each tick.
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By default, does nothing.
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"""
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pass
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def distance_squared(self, other: "Entity") -> int:
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"""
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Get the square of the distance to another entity.
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Useful to check distances since square root takes time.
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"""
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return (self.y - other.y) ** 2 + (self.x - other.x) ** 2
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def distance(self, other: "Entity") -> float:
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"""
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Get the cartesian distance to another entity.
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"""
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return sqrt(self.distance_squared(other))
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def is_fighting_entity(self) -> bool:
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"""
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Is this entity a fighting entity?
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"""
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return isinstance(self, FightingEntity)
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def is_item(self) -> bool:
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"""
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Is this entity an item?
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"""
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from squirrelbattle.entities.items import Item
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return isinstance(self, Item)
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@staticmethod
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def get_all_entity_classes():
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"""
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Returns all entities subclasses
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"""
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from squirrelbattle.entities.items import Heart, Bomb
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from squirrelbattle.entities.monsters import Beaver, Hedgehog, \
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Rabbit, TeddyBear
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return [Beaver, Bomb, Heart, Hedgehog, Rabbit, TeddyBear]
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@staticmethod
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def get_all_entity_classes_in_a_dict() -> dict:
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"""
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Returns all entities subclasses in a dictionary
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"""
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from squirrelbattle.entities.player import Player
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from squirrelbattle.entities.monsters import Beaver, Hedgehog, Rabbit, \
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TeddyBear
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from squirrelbattle.entities.items import Bomb, Heart
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return {
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"Beaver": Beaver,
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"Bomb": Bomb,
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"Heart": Heart,
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"Hedgehog": Hedgehog,
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"Rabbit": Rabbit,
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"TeddyBear": TeddyBear,
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"Player": Player,
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}
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def save_state(self) -> dict:
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"""
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Saves the coordinates of the entity
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"""
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d = dict()
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d["x"] = self.x
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d["y"] = self.y
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d["type"] = self.__class__.__name__
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return d
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class FightingEntity(Entity):
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"""
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A FightingEntity is an entity that can fight, and thus has a health,
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level and stats
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"""
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maxhealth: int
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health: int
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strength: int
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intelligence: int
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charisma: int
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dexterity: int
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constitution: int
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level: int
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def __init__(self, maxhealth: int = 0, health: Optional[int] = None,
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strength: int = 0, intelligence: int = 0, charisma: int = 0,
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dexterity: int = 0, constitution: int = 0, level: int = 0,
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*args, **kwargs) -> None:
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super().__init__(*args, **kwargs)
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self.maxhealth = maxhealth
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self.health = maxhealth if health is None else health
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self.strength = strength
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self.intelligence = intelligence
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self.charisma = charisma
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self.dexterity = dexterity
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self.constitution = constitution
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self.level = level
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@property
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def dead(self) -> bool:
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return self.health <= 0
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def hit(self, opponent: "FightingEntity") -> None:
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"""
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Deals damage to the opponent, based on the stats
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"""
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opponent.take_damage(self, self.strength)
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def take_damage(self, attacker: "Entity", amount: int) -> None:
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"""
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Take damage from the attacker, based on the stats
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"""
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self.health -= amount
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if self.health <= 0:
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self.die()
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def die(self) -> None:
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"""
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If a fighting entity has no more health, it dies and is removed
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"""
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self.map.remove_entity(self)
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def keys(self) -> list:
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"""
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Returns a fighting entities specific attributes
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"""
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return ["maxhealth", "health", "level", "strength",
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"intelligence", "charisma", "dexterity", "constitution"]
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def save_state(self) -> dict:
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"""
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Saves the state of the entity into a dictionary
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"""
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d = super().save_state()
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for name in self.keys():
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d[name] = getattr(self, name)
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return d
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