def emitter_27():
"""Maintain a steady count of particles"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitMaintainCount(3),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_on_circle(Vec2d.zero(), 2.0),
lifetime=random.uniform(1.0, 3.0),
))
return emitter_27.__doc__, e
def make_emitter():
return arcade.Emitter(
pos=Vec2d(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2),
# pos=Vec2d.zero(),
emit_controller=arcade.EmitterIntervalWithTime(0.0004, 15.0),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_in_circle(Vec2d.zero(), 5.0),
lifetime=1.0,
scale=0.5,
alpha=128))
def emitter_10():
"""Burst, emit from center, velocity from angle with spread"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitBurst(BURST_PARTICLE_COUNT // 4),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_vec_spread_deg(90, 45, 2.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_10.__doc__, e
def emitter_9():
"""Burst, emit from center, velocity in fixed angle and random speed"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitBurst(BURST_PARTICLE_COUNT // 4),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_vec_magnitude(45, 1.0, 4.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_9.__doc__, e
def emitter_26():
"""Interval, emit particles every 0.4 seconds and stop after emitting 5"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithCount(0.4, 5),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_in_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=0.6,
alpha=128))
return emitter_26.__doc__, e
def emitter_28():
"""random particle textures"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(
DEFAULT_EMIT_INTERVAL * 5, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=random.choice((TEXTURE, TEXTURE2, TEXTURE3)),
vel=arcade.rand_in_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE))
return emitter_28.__doc__, e
def emitter_1():
"""Burst, emit from center, particle lifetime 1.0 seconds"""
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_FAST),
lifetime=1.0,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_1.__doc__, e
def emitter_7():
"""Burst, emit from center, velocity fixed speed around 360 degrees"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitBurst(BURST_PARTICLE_COUNT // 4),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_on_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_7.__doc__, e
def emitter_11():
"""Burst, emit from center, velocity along a line"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitBurst(BURST_PARTICLE_COUNT // 4),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_on_line(Vec2d(-2, 1), Vec2d(2, 1)),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_11.__doc__, e
def emitter_3():
"""Burst, emit in circle"""
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_circle(Vec2d.zero(), 100),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_3.__doc__, e
def emitter_24():
"""Interval, emit from center, velocity from angle with spread"""
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_vec_spread_deg(90, 45, 2.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_24.__doc__, e
def emitter_30():
"""random particle alpha"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(
DEFAULT_EMIT_INTERVAL * 5, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_in_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=random.uniform(32, 128)))
return emitter_30.__doc__, e
def emitter_25():
"""Interval, emit from center, velocity along a line"""
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_on_line(Vec2d(-2, 1), Vec2d(2, 1)),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_25.__doc__, e
def emitter_20():
"""Interval, emit from center, velocity fixed speed around 360 degrees"""
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_on_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_20.__doc__, e
def emitter_32():
"""animate particle angle"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(
DEFAULT_EMIT_INTERVAL * 5, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE2,
vel=arcade.rand_in_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
change_angle=2,
scale=DEFAULT_SCALE))
return emitter_32.__doc__, e
def emitter_14():
"""Interval, emit from center, particle lifetime 1.0 seconds"""
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_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
lifetime=1.0,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_14.__doc__, e
def emitter_2():
"""Burst, emit from center, particle lifetime random in range"""
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_circle((0.0, 0.0), PARTICLE_SPEED_FAST),
lifetime=random.uniform(DEFAULT_PARTICLE_LIFETIME - 1.0,
DEFAULT_PARTICLE_LIFETIME),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_2.__doc__, e
def emitter_8():
"""Burst, emit from center, velocity in rectangle"""
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_rect(Vec2d(-2.0, -2.0), 4.0, 4.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
pos=Vec2d.zero(),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_8.__doc__, e
def emitter_23():
"""Interval, emit from center, velocity in fixed angle and random speed"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(
DEFAULT_EMIT_INTERVAL * 8, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_vec_magnitude(45, 1.0, 4.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_23.__doc__, e
def emitter_22():
"""Interval, emit from center, velocity in fixed angle and speed"""
e = arcade.Emitter(
center_xy=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(0.2, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE,
change_xy=(1.0, 1.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=128
)
)
return emitter_22.__doc__, e
def emitter_17():
"""Interval, emit on circle"""
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_circle(Vec2d.zero(), PARTICLE_SPEED_SLOW),
lifetime=DEFAULT_PARTICLE_LIFETIME,
pos=arcade.rand_on_circle(Vec2d.zero(), 100),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_17.__doc__, e
def emitter_15():
"""Interval, emit from center, particle lifetime random in range"""
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_FAST),
lifetime=random.uniform(DEFAULT_PARTICLE_LIFETIME - 1.0, DEFAULT_PARTICLE_LIFETIME),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA
)
)
return emitter_15.__doc__, e
def emitter_29():
"""random particle scale"""
e = arcade.Emitter(
center_xy=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(DEFAULT_EMIT_INTERVAL * 5, 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_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=random.uniform(0.1, 0.8),
alpha=DEFAULT_ALPHA
)
)
return emitter_29.__doc__, e
def emitter_31():
"""Constant particle angle"""
e = arcade.Emitter(
center_xy=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(DEFAULT_EMIT_INTERVAL * 5, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=TEXTURE2,
change_xy=arcade.rand_in_circle((0.0, 0.0), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
angle=45,
scale=DEFAULT_SCALE
)
)
return emitter_31.__doc__, e
def emitter_21():
"""Interval, emit from center, velocity in rectangle"""
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_rect((-2.0, -2.0), 4.0, 4.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA
)
)
return emitter_21.__doc__, e
def emitter_13():
"""Interval, emit particle every 0.01 seconds for one second"""
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_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA
)
)
return emitter_13.__doc__, e
def emitter_37():
"""Rotating emitter. Particles initial velocity is relative to emitter's angle."""
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=(0.0, 2.0),
lifetime=2.0,
scale=DEFAULT_SCALE
)
)
e.change_angle = 10.0
return emitter_37.__doc__, e
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_19():
"""Interval, emit on line"""
e = arcade.Emitter(
center_xy=(0.0, 0.0),
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_on_line((0.0, 0.0), (SCREEN_WIDTH, SCREEN_HEIGHT)),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA
)
)
return emitter_19.__doc__, e
def emitter_6():
"""Burst, emit on line"""
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_circle((0.0, 0.0), PARTICLE_SPEED_SLOW),
lifetime=DEFAULT_PARTICLE_LIFETIME,
center_xy=arcade.rand_on_line((0.0, 0.0), (SCREEN_WIDTH, SCREEN_HEIGHT)),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA
)
)
return emitter_6.__doc__, e
