def createParticleBurst(x0,
y0,
partInterval,
totalDuration,
partSize,
partScale,
partSpeed,
color,
startAlpha,
endAlpha,
imagePath=None):
e = arcade.Emitter(
center_xy=(x0, y0),
emit_controller=arcade.EmitterIntervalWithTime(partInterval,
totalDuration),
particle_factory=lambda emitter: arcade.FadeParticle(
filename_or_texture=imagePath
if imagePath is not None else arcade.make_circle_texture(
partSize, color),
change_xy=arcade.rand_in_circle((0.0, 0.0), partSpeed),
scale=partScale,
lifetime=uniform(totalDuration / 4, totalDuration),
start_alpha=startAlpha,
end_alpha=endAlpha,
),
)
return e
def make_interval_emitter(
pos: Vec2d,
filenames_and_textures: List[
str], # Also supports Texture objects in the List
emit_interval: float,
emit_duration: float,
particle_speed: float,
particle_lifetime_min: float,
particle_lifetime_max: float,
particle_scale: float = 1.0,
fade_particles: bool = True):
"""Returns an emitter that emits its particles at a constant rate for a given amount of time"""
particle_factory = arcade.LifetimeParticle
if fade_particles:
particle_factory = arcade.FadeParticle
return arcade.Emitter(
pos=pos,
emit_controller=arcade.EmitterIntervalWithTime(emit_interval,
emit_duration),
particle_factory=lambda emitter: particle_factory(
filename_or_texture=random.choice(filenames_and_textures),
vel=arcade.rand_on_circle(Vec2d.zero(), particle_speed),
lifetime=random.uniform(particle_lifetime_min,
particle_lifetime_max),
scale=particle_scale))
def make_spinner():
spinner = arcade.Emitter(
center_xy=(SCREEN_WIDTH / 2, SPINNER_HEIGHT - 5),
emit_controller=arcade.EmitterIntervalWithTime(0.025, 2.0),
particle_factory=lambda emitter: arcade.FadeParticle(
filename_or_texture=random.choice(STAR_TEXTURES),
change_xy=(0, 6.0),
lifetime=0.2))
spinner.change_angle = 16.28
return spinner
def make_emitter():
return arcade.Emitter(center_xy=(SCREEN_WIDTH / 2, SCREEN_HEIGHT / 2),
emit_controller=arcade.EmitterIntervalWithTime(
0.0004, 15.0),
particle_factory=lambda emitter: arcade.
LifetimeParticle(filename_or_texture=TEXTURE,
change_xy=arcade.rand_in_circle(
(0.0, 0.0), 5.0),
lifetime=1.0,
scale=0.5,
alpha=128))
def emitter_22():
"""Interval, emit from center, velocity in fixed angle and speed"""
e = arcade.Emitter(pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(
0.2, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.
LifetimeParticle(filename_or_texture=TEXTURE,
vel=Vec2d(1.0, 1.0),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=128))
return emitter_22.__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_33():
"""Particles that fade over time"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(DEFAULT_EMIT_INTERVAL,
DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.FadeParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_in_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE))
return emitter_33.__doc__, e
def emitter_37():
"""Rotating emitter. Particles initial velocity is relative to emitter's angle."""
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=Vec2d(0.0, 2.0),
lifetime=2.0,
scale=DEFAULT_SCALE))
e.change_angle = 10.0
return emitter_37.__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_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_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_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_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_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_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_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_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_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_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 dash_emitter_factory(color, pos_a, pos_b):
"""Interval, emit on line"""
logging.info("Creating dash emitter")
if pos_a[0] > pos_b[0]:
angle = 0
else:
angle = 180
textures = [
arcade.Texture(f"{time.time()}", Image.new("RGBA", (10, 10), p))
for p in rand_color(color)
]
line_e = arcade.Emitter(
center_xy=(0.0, 0.0),
emit_controller=arcade.EmitterIntervalWithTime(LINE_EMIT_INTERVAL,
DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=random.choice(textures),
change_xy=arcade.rand_in_circle((0.0, 0.0), PARTICLE_SPEED_SLOW),
lifetime=DEFAULT_PARTICLE_LIFETIME,
center_xy=arcade.rand_on_line(pos_a, pos_b),
scale=LINE_SCALE,
alpha=DEFAULT_ALPHA,
),
)
exhaust_plume_e = arcade.Emitter(
center_xy=pos_a,
emit_controller=arcade.EmitterIntervalWithTime(PLUME_EMIT_INTERVAL,
PLUME_EMIT_DURATION),
particle_factory=lambda emitter: arcade.FadeParticle(
filename_or_texture=random.choice(textures),
change_xy=arcade.rand_vec_spread_deg(angle, 25, 4.0),
lifetime=PLUME_PARTICLE_LIFETIME,
scale=PLUME_SCALE,
),
)
return line_e, exhaust_plume_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 firework(position):
x = position.x
y = position.y
return arcade.Emitter(
center_xy=(x, y),
change_xy=(0, 5),
emit_controller=arcade.EmitterIntervalWithTime(emit_interval=0.1, lifetime=3),
particle_factory=lambda emitter: arcade.FadeParticle(
filename_or_texture=FIREWORK_PARTICLE,
change_xy=arcade.rand_in_circle((0.0, 0.0), 1.0),
lifetime=1.5,
scale=0.5 * random.random(),
),
)
def emitter_35():
"""Use most features"""
soft_circle = arcade.make_soft_circle_texture(80, (255, 64, 64))
textures = (TEXTURE, TEXTURE2, TEXTURE3, TEXTURE4, TEXTURE5, TEXTURE6,
TEXTURE7, soft_circle)
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitterIntervalWithTime(0.01, 1.0),
particle_factory=lambda emitter: arcade.FadeParticle(
filename_or_texture=random.choice(textures),
vel=arcade.rand_in_circle(Vec2d.zero(), PARTICLE_SPEED_FAST * 2),
lifetime=random.uniform(1.0, 3.5),
angle=random.uniform(0, 360),
change_angle=random.uniform(-3, 3),
scale=random.uniform(0.1, 0.8)))
return emitter_35.__doc__, e
def emitter_18():
"""Interval, emit in rectangle"""
width, height = 200, 100
centering_offset = Vec2d(-width / 2, -height / 2)
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_in_rect(centering_offset, width, height),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_18.__doc__, e
def make_rocket(emit_done_cb):
"""Emitter that displays the smoke trail as the firework shell climbs into the sky"""
rocket = RocketEmitter(
center_xy=(random.uniform(100, SCREEN_WIDTH - 100), 25),
emit_controller=arcade.EmitterIntervalWithTime(0.04, 2.0),
particle_factory=lambda emitter: arcade.FadeParticle(
filename_or_texture=ROCKET_SMOKE_TEXTURE,
change_xy=arcade.rand_in_circle((0.0, 0.0), 0.08),
scale=0.5,
lifetime=random.uniform(1.0, 1.5),
start_alpha=100,
end_alpha=0,
mutation_callback=rocket_smoke_mutator),
emit_done_cb=emit_done_cb)
rocket.change_x = random.uniform(-1.0, 1.0)
rocket.change_y = random.uniform(5.0, 7.25)
return rocket
def explosion(x, y):
""" Create an explosion when crate destroyed """
e = arcade.Emitter(
center_xy=(x, y),
emit_controller=arcade.EmitterIntervalWithTime(
constants.DEFAULT_EMIT_INTERVAL * 1.25,
constants.DEFAULT_EMIT_DURATION / 6),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=constants.E_TEXTURE,
change_xy=arcade.rand_in_circle(
(0.0, 0.0), constants.PARTICLE_SPEED_FAST * 6),
lifetime=random.uniform(0.05, 1),
scale=random.uniform(0.05, 0.3),
alpha=random.uniform(64, 250),
change_angle=random.uniform(-30, 30),
angle=random.uniform(0, 360)))
return e
def make_interval_emitter(center_xy: Point,
filenames_and_textures: List[FilenameOrTexture],
emit_interval: float,
emit_duration: float,
particle_speed: float,
particle_lifetime_min: float,
particle_lifetime_max: float,
particle_scale: float = 1.0,
fade_particles: bool = True):
"""Returns an emitter that emits its particles at a constant rate for a given amount of time"""
particle_factory = arcade.LifetimeParticle
if fade_particles:
particle_factory = arcade.FadeParticle
return arcade.Emitter(
center_xy=center_xy,
emit_controller=arcade.EmitterIntervalWithTime(emit_interval,
emit_duration),
particle_factory=lambda emitter: particle_factory(
filename_or_texture=random.choice(filenames_and_textures),
change_xy=arcade.rand_on_circle((0.0, 0.0), particle_speed),
lifetime=random.uniform(particle_lifetime_min,
particle_lifetime_max),
scale=particle_scale))
