class Crossover(Sprite):
def __init__(self, area):
super(Crossover, self).__init__(None)
self.collidable = False
self.obey_gravity = False
self.crossover_area = area
def on_added(self, layer):
self.effect = ShakeEffect(self)
self.effect.start()
def on_removed(self, layer):
self.effect.stop()
def update_image(self):
if not self.image:
possible_sprites = []
new_rect = pygame.Rect(0, 0, 0, 0)
for layer in self.crossover_area.layers:
if layer.index == self.layer.index:
for sprite in layer.quad_tree.get_sprites(self.rect):
if new_rect.width == 0:
new_rect = sprite.rect
else:
new_rect = new_rect.union(sprite.rect)
break
if new_rect.width == 0:
self.hide()
return
w = random.randint(300, 600)
h = random.randint(300, 600)
try:
x = random.randint(max(new_rect.left, self.rect.left),
min(new_rect.right, self.rect.right))
y = random.randint(max(new_rect.top, self.rect.top),
min(new_rect.bottom, self.rect.bottom))
except ValueError:
self.hide()
return
self.rect = pygame.Rect(x, y, w, h)
self.image = pygame.Surface(self.rect.size).convert_alpha()
self.image.fill((0, 0, 0, 0))
for sprite in layer.quad_tree.get_sprites(self.rect):
pos = (sprite.rect.left - self.rect.left,
sprite.rect.top - self.rect.top)
self.image.blit(sprite.image, pos)
