class Player(Ball):
"""The player ball."""
SPEED = 400 # movement speed with the keyboard
def __init__(self, x, y):
"""
Creates the player ball.
@param x: initial x position of the ball.
@param y: initial y position of the ball.
"""
super().__init__("player.png")
self.position = x, y # WARNING: position is a tuple, not a vector!
self.cshape.center = Vector2(x, y) # the center must be a Vector2!
self._frozen = False
self._invulnerable = False
self.invulnerableSprite = Sprite("player_invulnerable.png", opacity=0)
self.add(self.invulnerableSprite, z=0.8)
def freeze(self):
"""Freezes the ball."""
self.image = pyglet.resource.image("player_frozen.png")
self._frozen = True
def unfreeze(self):
"""Unfreezes the ball."""
self._frozen = False
self.image = pyglet.resource.image("player.png")
def isFrozen(self):
"""Returns whether the ball is frozen."""
return self._frozen
def makeInvulnerable(self):
"""Makes the ball invulnerable."""
self.invulnerableSprite.stop()
self._invulnerable = True
self.invulnerableSprite.opacity = 255
def makeVulnerable(self):
"""Makes the ball vulnerable after an animation."""
if self.isInvulnerable():
self.invulnerableSprite.stop()
actions = FadeOut(0.2) + (FadeIn(0.2) + FadeOut(0.2)) * 4 + \
CallFunc(self._makeVulnerable)
self.invulnerableSprite.do(actions)
def isInvulnerable(self):
"""Returns whether the ball is invulnerable."""
return self._invulnerable
def update(self, dt, mouseDelta: Vector2, keysPressed):
# Move player according to mouse/keyboard
if not self.isFrozen():
self.position += mouseDelta
self.position += Player._keyboardDelta(keysPressed) * Player.SPEED * dt
self.ensureWithinBorders() # check borders
def _makeVulnerable(self):
self.invulnerableSprite.opacity = 0
self._invulnerable = False
@staticmethod
def _keyboardDelta(keysPressed):
"""
Returns a vector that points to the direction the arrow keys are pressed.
Each coordinate of the vector will have the value -1, 0 or 1.
@param keysPressed: the keys currently held down.
@return: direction of the arraw keys pressed in the keyboard.
"""
delta = Vector2(0, 0)
if window.key.LEFT in keysPressed:
delta.x -= 1
if window.key.RIGHT in keysPressed:
delta.x += 1
if window.key.UP in keysPressed:
delta.y += 1
if window.key.DOWN in keysPressed:
delta.y -= 1
return delta
