class Explosion(pygame.sprite.Sprite):
def __init__(self, pos):
super().__init__()
self.image = load_image('images/explosion_anim.jpg')
self.rect = self.image.get_rect()
self.rect.center = pos
self.crop = (64, 64)
self.dim = 4
self.cooldown = Cooldown(220)
self.back = False
def update(self, engine, delta):
self.cooldown.update(delta)
if self.cooldown.reset_if_ready():
if self.back:
self.kill()
else:
self.back = True
def draw(self, surface):
target = pygame.rect.Rect((0, 0), self.crop)
target.center = self.rect.center
surface.blit(self.image, target, area=self.get_crop())
def get_crop(self):
progress = self.cooldown.progress
frame_count = self.dim**2
index = int(progress * frame_count) % frame_count
if self.back:
index = frame_count - index - 1
dim = self.dim - 1
x = dim - (index % self.dim)
y = dim - (index // self.dim)
cx = x * self.crop[0]
cy = y * self.crop[1]
return pygame.rect.Rect((cx, cy), self.crop)
class Player(GameObject):
def __init__(self, engine, pos):
super().__init__(load_image('images/plane.gif'), pos)
self.image_straight = self.image
self.image_left = load_image('images/plane_turning_right_1.gif')
self.image_right = load_image('images/plane_turning_left_1.gif')
self.engine = engine
self.speed = [0, 0] # [x, y]
self.health = 3
self.score = 0
self.missiles = pygame.sprite.Group()
self.explosions = pygame.sprite.Group()
self.font = pygame.font.Font(None, 36)
self.cooldown = Cooldown(150)
self.explosion_sound = pygame.mixer.Sound('sound/explosion.wav')
self.key = {
K_RIGHT: False,
K_LEFT: False,
K_UP: False,
K_DOWN: False,
K_SPACE: False
}
def handle_keys(self, event):
if event.type not in (KEYDOWN, KEYUP):
return
speed_value = 500
if event.key in self.key:
self.key[event.key] = event.type == KEYDOWN
image = self.image
speed = [0, 0]
if self.key[K_RIGHT]:
speed[0] = speed_value
image = self.image_right
if self.key[K_LEFT]:
speed[0] = -speed_value
image = self.image_left
if self.key[K_UP]:
speed[1] = -speed_value
if self.key[K_DOWN]:
speed[1] = speed_value
if not self.key[K_RIGHT] and not self.key[K_LEFT]:
image = self.image_straight
self.speed = speed
self.image = image
def update(self, engine, delta):
x, y = self.speed
self.move(x * delta, y * delta)
width, height = engine.screen.get_width(), engine.screen.get_height()
if self.rect.left < 0:
self.move(abs(self.rect.left), 0)
if self.rect.right >= width:
self.move(width - self.rect.right, 0)
if self.rect.top < 0:
self.move(0, -self.rect.top)
if self.rect.bottom >= height:
self.move(0, height - self.rect.bottom)
self.cooldown.update(delta)
if self.key[K_SPACE] and self.cooldown.reset_if_ready():
self.spawn_missile()
self.missiles.update(engine, delta)
self.explosions.update(engine, delta)
def draw(self, surface):
for missile in self.missiles:
missile.draw(surface)
for explosion in self.explosions:
explosion.draw(surface)
surface.blit(self.image, self.rect)
self.draw_status(surface)
def draw_status(self, screen):
if pygame.font:
# draw score
text = self.font.render('Score: {}'.format(self.score), 1,
(255, 0, 0))
textpos = text.get_rect(centerx=screen.get_width() / 2)
screen.blit(text, textpos)
# draw health
text = self.font.render('Health: {}'.format(self.health), 1,
(0, 255, 0))
textpos = text.get_rect(centerx=screen.get_width() / 2, centery=40)
screen.blit(text, textpos)
def lose_health(self):
self.health -= 1
if self.health <= 0:
self.engine.end()
def on_enemy_destroyed(self, enemy):
self.score += enemy.score
self.explosions.add(Explosion(enemy.rect.center))
self.explosion_sound.play()
def spawn_missile(self):
missile = Missile(self, self.rect.center)
self.missiles.add(missile)
# https://www.pygame.org/docs/ref/color.html
c = pygame.Color(255, 0, 0) # Create a color (R, G, B), each in interval [0, 255]
engine.screen # window screen
engine.screen.get_width() # window width
engine.screen.get_height() # window height
# delta
clock = pygame.time.Clock() # create a delta clock
delta = clock.tick(60) / 1000 # calculate delta in each update frame
rect = rect.move(500 * delta, 0) # move rectangle in X axis by 500 * delta
# cooldown
cd = Cooldown(500) # 500 ms cooldown
cd.update(delta) # update cooldown in every frame
if cd.reset_if_ready(): # returns True if CD is ready and resets it if its ready
pass
# react to some key event
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
else:
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
pass
# collisions
# return all sprites from collection `items` that collide with `player`
collisions = pygame.sprite.spritecollide(player, items, False)
if collisions: