def emitter_8():
"""Burst, emit from center, velocity in rectangle"""
e = arcade.Emitter(center_xy=CENTER_POS,
emit_controller=arcade.EmitBurst(BURST_PARTICLE_COUNT),
particle_factory=lambda emitter: arcade.
LifetimeParticle(filename_or_texture=TEXTURE,
change_xy=arcade.rand_in_rect(
(-2.0, -2.0), 4.0, 4.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_8.__doc__, e
def emitter_21():
"""Interval, emit from center, velocity in rectangle"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(DEFAULT_EMIT_INTERVAL,
DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_in_rect(Vec2d(-2.0, -2.0), 4.0, 4.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_21.__doc__, e
def __init__(self):
super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
# Set the working directory (where we expect to find files) to the same
# directory this .py file is in. You can leave this out of your own
# code, but it is needed to easily run the examples using "python -m"
# as mentioned at the top of this program.
file_path = os.path.dirname(os.path.abspath(__file__))
os.chdir(file_path)
arcade.set_background_color(arcade.color.BLACK)
self.emitters = []
self.frametime_plotter = FrametimePlotter()
self.launch_firework(0)
arcade.schedule(self.launch_spinner, 4.0)
stars = arcade.Emitter(
center_xy=(0.0, 0.0),
emit_controller=arcade.EmitMaintainCount(20),
particle_factory=lambda emitter: AnimatedAlphaParticle(
filename_or_texture=random.choice(STAR_TEXTURES),
change_xy=(0.0, 0.0),
start_alpha=0,
duration1=random.uniform(2.0, 6.0),
mid_alpha=128,
duration2=random.uniform(2.0, 6.0),
end_alpha=0,
center_xy=arcade.rand_in_rect((0.0, 0.0), SCREEN_WIDTH, SCREEN_HEIGHT)
)
)
self.emitters.append(stars)
self.cloud = arcade.Emitter(
center_xy=(50, 500),
change_xy=(0.15, 0),
emit_controller=arcade.EmitMaintainCount(60),
particle_factory=lambda emitter: AnimatedAlphaParticle(
filename_or_texture=random.choice(CLOUD_TEXTURES),
change_xy=(_Vec2(arcade.rand_in_circle((0.0, 0.0), 0.04)) + _Vec2(0.1, 0)).as_tuple(),
start_alpha=0,
duration1=random.uniform(5.0, 10.0),
mid_alpha=255,
duration2=random.uniform(5.0, 10.0),
end_alpha=0,
center_xy=arcade.rand_in_circle((0.0, 0.0), 50)
)
)
self.emitters.append(self.cloud)
def emitter_5():
"""Burst, emit in rectangle"""
width, height = 200, 100
centering_offset = Vec2d(-width / 2, -height / 2)
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitBurst(BURST_PARTICLE_COUNT),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_in_circle(Vec2d.zero(), PARTICLE_SPEED_SLOW),
lifetime=DEFAULT_PARTICLE_LIFETIME,
pos=arcade.rand_in_rect(centering_offset, width, height),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_5.__doc__, e
def emitter_18():
"""Interval, emit in rectangle"""
width, height = 200, 100
centering_offset = (-width / 2, -height / 2)
e = arcade.Emitter(
center_xy=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(DEFAULT_EMIT_INTERVAL,
DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
change_xy=arcade.rand_in_circle((0.0, 0.0), PARTICLE_SPEED_SLOW),
lifetime=DEFAULT_PARTICLE_LIFETIME,
center_xy=arcade.rand_in_rect(centering_offset, width, height),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_18.__doc__, e
def test_rand_in_rect():
"""Smoke test"""
arcade.rand_in_rect((10.0, 20.0), 30.5, 5.1)