def __init__(self, pos=SCREEN_CENTER):
Entity.__init__(self, (18, 18), pos)
# Acceleration vector that will be rotated and added to velocity
self.acceleration = Vector(0, -0.2)
# controls how quickly the ship slows down
self.slow_speed = 0.1
# controls how quickly the ship rotates and slows its rotation
self.rotate_increment = 0.5
self.slow_rotation = self.rotate_increment / 2
# 10 frame cooldown, start at 0
self.fire_cooldown = 0
# Group of all lasers for collision purposes
self.lasers = SpriteGroup()
# Draws an arrow facing in the direction of angle to serve as the ship
size = self.image.get_size()
arrow_points = [
(0, size[1] - 1), # bottom left
((size[0] - 1) / 2, 0), # top middle
(size[0] - 1, size[1] - 1) # bottom right
]
draw_lines(self.image, COLOR.WHITE, False, arrow_points, 2)
def __init__(self, tier=1, speed=3, angle=0, pos=(0, 0)):
# Tier determines the size, and how many times it breaks apart
size = (tier * 15, tier * 15)
Entity.__init__(self, size, pos)
self.tier = tier
self.velocity.from_polar((speed, angle))
self.angle = angle
self.position = Vector(pos)
# The angle spread of the children when the asteroid breaks apart
self.spread = 20
first = (size[0] - 1) / 3
second = first * 2
third = first * 3
octagon = [
(first, 0), # top 1
(second, 0), # top 2
(third, first), # right 1
(third, second), # right 2
(second, third), # bottom 1
(first, third), # bottom 2
(0, second), # left 1
(0, first) # left 2
]
draw_polygon(self.image, COLOR.WHITE, octagon, 2)
Asteroid.group.add(self)
def __init__(self, pos=(0, 0), angle=0):
Entity.__init__(self, (5, 2), pos)
# 60 frames = 1 second
self.lifetime = 60
self.orig_img.fill(COLOR.WHITE)
# angle 0 points right, so subtract 90 degrees
angle = angle - 90
self.velocity.from_polar((self.max_velocity, angle))
self.rotate(angle)
def __init__(self, *args):
"""Create a viewport entity that displays contents of a camera inside the world.
Arguments are either (Camera, int, int) for a new camera or
(Camera) for an existing one
"""
Entity.__init__(self)
if len(args) == 1:
self.camera = args[0]
elif len(args) == 3:
scene = args[0]
width = args[1]
height = args[2]
self.camera = Camera(scene, width, height)
else:
raise TypeError, "Viewport's constructor takes either 4 or 2 arguments, %i given" % len(args)+1