src/effects.py

from __future__ import annotations

import pygame


class Explosion(pygame.sprite.Sprite):
    def __init__(self, pos: tuple[float, float], frames: list[pygame.Surface], frame_time: float = 0.06):
        super().__init__()
        self.frames = frames
        self.frame_time = float(frame_time)
        self.t = 0.0
        self.idx = 0
        self.image = self.frames[0] if self.frames else pygame.Surface((1, 1), pygame.SRCALPHA)
        self.rect = self.image.get_rect(center=pos)
        self.pos = pygame.Vector2(pos)

    def update(self, dt: float):
        if not self.frames:
            self.kill()
            return
        self.t += dt
        while self.t >= self.frame_time:
            self.t -= self.frame_time
            self.idx += 1
            if self.idx >= len(self.frames):
                self.kill()
                return
            center = self.rect.center
            self.image = self.frames[self.idx]
            self.rect = self.image.get_rect(center=center)