class Player(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.image = Spritesheet('spritesheet.png').parse_sprite('chick.png')
self.rect = self.image.get_rect()
self.LEFT_KEY, self.RIGHT_KEY, self.FACING_LEFT = False, False, False
self.is_jumping, self.on_ground = False, False
self.gravity, self.friction = .35, -.12
self.position, self.velocity = pygame.math.Vector2(
0, 0), pygame.math.Vector2(0, 0)
self.acceleration = pygame.math.Vector2(0, self.gravity)
def draw(self, display):
display.blit(self.image, (self.rect.x, self.rect.y))
def update(self, dt):
self.horizontal_movement(dt)
self.vertical_movement(dt)
def horizontal_movement(self, dt):
self.acceleration.x = 0
if self.LEFT_KEY:
self.acceleration.x -= .3
elif self.RIGHT_KEY:
self.acceleration.x += .3
self.acceleration.x += self.velocity.x * self.friction
self.velocity.x += self.acceleration.x * dt
self.limit_velocity(4)
self.position.x += self.velocity.x * dt + (self.acceleration.x *
.5) * (dt * dt)
self.rect.x = self.position.x
def vertical_movement(self, dt):
self.velocity.y += self.acceleration.y * dt
if self.velocity.y > 7: self.velocity.y = 7
self.position.y += self.velocity.y * dt + (self.acceleration.y *
.5) * (dt * dt)
if self.position.y > 128:
self.on_ground = True
self.velocity.y = 0
self.position.y = 128
self.rect.bottom = self.position.y
def limit_velocity(self, max_vel):
min(-max_vel, max(self.velocity.x, max_vel))
if abs(self.velocity.x) < .01: self.velocity.x = 0
def jump(self):
if self.on_ground:
self.is_jumping = True
self.velocity.y -= 8
self.on_ground = False
class Alien_2(Sprite):
#a class to represent a single alien in the fleet
def __init__(self, ai_settings, screen):
#initialize the alien and set its starting position
super(Alien_2, self).__init__()
self.screen = screen
self.ai_settings = ai_settings
self.image = Spritesheet('images/spritesheet.png')
self.images = []
self.index = 0
self.images.append(
self.image.image_at((64, 0, 64, 64), colorkey=(0, 0, 0, 1)))
self.images.append(
self.image.image_at((128, 0, 64, 64), colorkey=(0, 0, 0, 1)))
self.score = 20
self.image = self.images[self.index]
#load the alien image and set its rect attribute
self.rect = self.image.get_rect()
#start each new alien near the top left of the screen
self.rect.x = self.rect.width
self.rect.y = self.rect.height
#store the alien's exact position
self.x = float(self.rect.x)
def blitme(self):
self.screen.blit(self.image, self.rect)
def check_edges(self):
#return true if alien is at edge of screen
screen_rect = self.screen.get_rect()
if self.rect.right >= screen_rect.right:
return True
elif self.rect.left <= 0:
return True
def update(self):
#move the alien right or left
self.x += (self.ai_settings.alien_speed_factor *
self.ai_settings.fleet_direction)
self.rect.x = self.x
self.index += .02
if self.index >= len(self.images):
self.index = 0
self.image = self.images[math.floor(self.index)]
class Player(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.LEFT_KEY, self.RIGHT_KEY, self.FACING_LEFT = False, False, False
self.is_jumping, self.on_ground = False, False
self.gravity, self.friction = .35, -.12
self.image = Spritesheet('spritesheet.png').parse_sprite('chick.png')
self.rect = self.image.get_rect()
self.position, self.velocity = pygame.math.Vector2(
0, 0), pygame.math.Vector2(0, 0)
self.acceleration = pygame.math.Vector2(0, self.gravity)
def draw(self, display):
display.blit(self.image, (self.rect.x, self.rect.y))
def update(self, dt, tiles):
self.horizontal_movement(dt)
self.checkCollisionsx(tiles)
self.vertical_movement(dt)
self.checkCollisionsy(tiles)
def horizontal_movement(self, dt):
self.acceleration.x = 0
if self.LEFT_KEY:
self.acceleration.x -= .3
elif self.RIGHT_KEY:
self.acceleration.x += .3
self.acceleration.x += self.velocity.x * self.friction
self.velocity.x += self.acceleration.x * dt
self.limit_velocity(4)
self.position.x += self.velocity.x * dt + (self.acceleration.x *
.5) * (dt * dt)
self.rect.x = self.position.x
def vertical_movement(self, dt):
self.velocity.y += self.acceleration.y * dt
if self.velocity.y > 7: self.velocity.y = 7
self.position.y += self.velocity.y * dt + (self.acceleration.y *
.5) * (dt * dt)
self.rect.bottom = self.position.y
def limit_velocity(self, max_vel):
self.velocity.x = max(-max_vel, min(self.velocity.x, max_vel))
if abs(self.velocity.x) < .01: self.velocity.x = 0
def jump(self):
if self.on_ground:
self.is_jumping = True
self.velocity.y -= 8
self.on_ground = False
def get_hits(self, tiles):
hits = []
for tile in tiles:
if self.rect.colliderect(tile):
hits.append(tile)
return hits
def checkCollisionsx(self, tiles):
collisions = self.get_hits(tiles)
for tile in collisions:
if self.velocity.x > 0: # Hit tile moving right
self.position.x = tile.rect.left - self.rect.w
self.rect.x = self.position.x
elif self.velocity.x < 0: # Hit tile moving left
self.position.x = tile.rect.right
self.rect.x = self.position.x
def checkCollisionsy(self, tiles):
self.on_ground = False
self.rect.bottom += 1
collisions = self.get_hits(tiles)
for tile in collisions:
if self.velocity.y > 0: # Hit tile from the top
self.on_ground = True
self.is_jumping = False
self.velocity.y = 0
self.position.y = tile.rect.top
self.rect.bottom = self.position.y
elif self.velocity.y < 0: # Hit tile from the bottom
self.velocity.y = 0
self.position.y = tile.rect.bottom + self.rect.h
self.rect.bottom = self.position.y
