nodes/npc.py

Part of GDQuest Open RPG.

 1"""NPC: stationary or patrolling sprite with a dialogue id."""
 2
 3from __future__ import annotations
 4
 5import math
 6
 7from simvx.core import Sprite2D
 8from simvx.core.math.types import Vec2
 9
10from . import sprites as art
11from .gameboard import cell_to_pixel
12from .settings import TILE
13
14
15def _sprite_for_kind(kind: str):
16    if kind == "monk":
17        return art.wizard_sprite()
18    if kind == "smith":
19        return art.knight_sprite()
20    if kind == "wizard_npc":
21        return art.wizard_sprite()
22    return art.knight_sprite()
23
24
25class NPC(Sprite2D):
26    def __init__(self, cell: tuple[int, int], kind: str, dialogue_id: str) -> None:
27        super().__init__(texture=_sprite_for_kind(kind))
28        self.filter = "nearest"
29        self.width = TILE
30        self.height = TILE
31        self.cell = tuple(cell)
32        x, y = cell_to_pixel(*cell)
33        self.position = Vec2(x, y)
34        self.kind = kind
35        self.dialogue_id = dialogue_id
36        # Subtle bob
37        self._bob_t = 0.0
38
39    def on_update(self, dt: float) -> None:
40        # Tiny vertical bob for visual life
41        self._bob_t += dt
42        bob = math.sin(self._bob_t * 2.0) * 1.2
43        x, y = cell_to_pixel(*self.cell)
44        self.position = Vec2(x, y + bob)