64 lines
1.8 KiB
Python
64 lines
1.8 KiB
Python
"""Collection of common components."""
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from __future__ import annotations
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from typing import Final, Self
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import attrs
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import math
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import tcod.ecs.callbacks
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from tcod.ecs import Entity
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@attrs.define(frozen=True)
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class Position:
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"""An entities position."""
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x: int
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y: int
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def __add__(self, direction: tuple[int, int] | Position) -> Self:
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"""Add a vector to this position."""
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match direction:
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case Position(x, y):
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return self.__class__(self.x + x, self.y + y)
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x, y = direction
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return self.__class__(self.x + x, self.y + y)
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def __sub__(self, direction: tuple[int, int] | Position) -> Self:
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match direction:
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case Position(x, y):
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return self.__class__(self.x - x, self.y - y)
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x, y = direction
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return self.__class__(self.x - x, self.y - y)
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def mod(self, other: tuple[int,int] | Position | int) -> Self:
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match other:
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case Position(x,y):
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return self.__class__(self.x//x, self.y//y)
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case int(x):
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return self.__class__(self.x//x, self.y//x)
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x,y = other
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return self.__class__(self.x//x, self.y//y)
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def length(self):
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return math.sqrt(self.x**2+self.y**2)
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@tcod.ecs.callbacks.register_component_changed(component=Position)
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def on_position_changed(entity: Entity, old: Position | None, new: Position | None) -> None:
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"""Mirror position components as a tag."""
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if old == new:
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return
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if old is not None:
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entity.tags.discard(old)
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if new is not None:
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entity.tags.add(new)
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@attrs.define(frozen=True)
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class Graphic:
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"""An entities icon and color."""
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ch: int = ord("!")
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fg: tuple[int, int, int] = (255, 255, 255)
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Gold: Final = ("Gold", int)
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"""Amount of gold."""
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