pacman2/scenes/game_objects/pacman.py

from pygame import Surface, draw, Rect, key, image, transform
from pygame.locals import K_UP, K_DOWN, K_LEFT, K_RIGHT

from engine.entity import Entity
from engine.game import Game
from engine.resources import res
from engine.components.collide_rect import CollideRect
from engine.components.sprite import Sprite

from .common import S
from .pacdot import EnsmallmentDot


class PacMan(Entity):
    SPEED = 2

    def __init__(self, x, y):
        super().__init__('pacman')
        self.x = x
        self.y = y

        # Surface quand on est petit.
        self.smol_surf = Surface((S//2, S//2)).convert()
        self.smol_surf.fill((0, 0, 0))
        draw.circle(self.smol_surf,
                    (255, 255, 0),
                    (S//4, S//4),
                    S//4)

        # Surfaces pour chaque direction, pour chaque état de
        # l’animation.
        surf_1 = image.load(res('pacman_1.png')).convert()
        surf_2 = image.load(res('pacman_2.png')).convert()
        self.surf = [[transform.rotate(surf_1, 90),
                      transform.rotate(surf_1, -90),
                      transform.flip(surf_1, True, False),
                      surf_1],
                     [transform.rotate(surf_2, 90),
                      transform.rotate(surf_2, -90),
                      transform.flip(surf_2, True, False),
                      surf_2]]

        # État d’animation courant.
        self.cur_anim = 0

        self.sprite = self.add(Sprite(self.surf[self.cur_anim][0], 2))

        # Rectangle quand on est petit.
        self.smol_rect = Rect(self.x, self.y,
                              self.sprite.width//2, self.sprite.width//2)

        self.rect = Rect(self.x, self.y,
                         self.sprite.width, self.sprite.width)

        self.phys = CollideRect(self.rect,
                                static=False,
                                cb=self.cb)

        self.add(self.phys)

        self.script = PacMan.update
        self.smol = False
        self.smol_since = None

    def cb(self, c):
        if not isinstance(c.parent, EnsmallmentDot):
            return
        # On a mangé une graine de rapetissement.
        if not self.smol:
            # Décalage au milieu du couloir
            self.x += S//4
            self.y += S//4

            PacMan.SPEED *= 2
            self.smol_rect.x = self.x
            self.smol_rect.y = self.y
            self.phys.rect = self.smol_rect
            self.smol = True
        self.smol_since = Game.cur_tick

    def update(self):
        p = self.phys
        s = self.sprite

        # Expiration du rapetissement.
        if self.smol and Game.cur_tick - self.smol_since > 60*2:
            # On se réaligne dans le couloir.
            self.x -= self.x % S
            self.y -= self.y % S

            self.rect.x = self.x
            self.rect.y = self.y
            self.phys.rect = self.rect
            self.smol = False
            PacMan.SPEED = PacMan.SPEED//2

        # Avance l’état d’animation.
        if Game.cur_tick % 5 == 0:
            self.cur_anim += 1
            self.cur_anim %= 2

        # Choix de la surface en fonction de la direction effective.
        if p.vy < 0:
            s.surf = self.surf[self.cur_anim][0]
        elif p.vy > 0:
            s.surf = self.surf[self.cur_anim][1]
        elif p.vx < 0:
            s.surf = self.surf[self.cur_anim][2]
        elif p.vx > 0:
            s.surf = self.surf[self.cur_anim][3]

        if self.smol:
            s.surf = self.smol_surf

        inputs = key.get_pressed()
        if self.smol:
            # Quand on est petit on n’a pas de maintient de la
            # vitesse.
            p.vx = 0
            p.vy = 0
        if inputs[K_UP]:
            p.vy = -PacMan.SPEED
        if inputs[K_DOWN]:
            p.vy = PacMan.SPEED
        if inputs[K_LEFT]:
            p.vx = -PacMan.SPEED
        if inputs[K_RIGHT]:
            p.vx = PacMan.SPEED