def explode_ringed_firework(self, prev_emitter):
"""Actions that happen when a firework shell explodes, resulting in a ringed firework"""
self.emitters.append(make_puff(prev_emitter))
self.emitters.append(make_flash(prev_emitter))
spark_texture, ring_texture = random.choice(SPARK_PAIRS)
sparks = arcadeplus.Emitter(
center_xy=prev_emitter.get_pos(),
emit_controller=arcadeplus.EmitBurst(25),
particle_factory=lambda emitter: arcadeplus.FadeParticle(
filename_or_texture=spark_texture,
change_xy=arcadeplus.rand_in_circle((0.0, 0.0), 8.0),
lifetime=random.uniform(0.55, 0.8),
mutation_callback=firework_spark_mutator))
self.emitters.append(sparks)
ring = arcadeplus.Emitter(
center_xy=prev_emitter.get_pos(),
emit_controller=arcadeplus.EmitBurst(20),
particle_factory=lambda emitter: arcadeplus.FadeParticle(
filename_or_texture=ring_texture,
change_xy=arcadeplus.rand_on_circle(
(0.0, 0.0), 5.0) + arcadeplus.rand_in_circle(
(0.0, 0.0), 0.25),
lifetime=random.uniform(1.0, 1.6),
mutation_callback=firework_spark_mutator))
self.emitters.append(ring)
def emitter_27():
"""Maintain a steady count of particles"""
e = arcadeplus.Emitter(
center_xy=CENTER_POS,
emit_controller=arcadeplus.EmitMaintainCount(3),
particle_factory=lambda emitter: arcadeplus.LifetimeParticle(
filename_or_texture=TEXTURE,
change_xy=arcadeplus.rand_on_circle((0.0, 0.0), 2.0),
lifetime=random.uniform(1.0, 3.0),
))
return emitter_27.__doc__, e
def emitter_7():
"""Burst, emit from center, velocity fixed speed around 360 degrees"""
e = arcadeplus.Emitter(
center_xy=CENTER_POS,
emit_controller=arcadeplus.EmitBurst(BURST_PARTICLE_COUNT // 4),
particle_factory=lambda emitter: arcadeplus.LifetimeParticle(
filename_or_texture=TEXTURE,
change_xy=arcadeplus.rand_on_circle(
(0.0, 0.0), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_7.__doc__, e
def emitter_20():
"""Interval, emit from center, velocity fixed speed around 360 degrees"""
e = arcadeplus.Emitter(
center_xy=CENTER_POS,
emit_controller=arcadeplus.EmitterIntervalWithTime(
DEFAULT_EMIT_INTERVAL, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcadeplus.LifetimeParticle(
filename_or_texture=TEXTURE,
change_xy=arcadeplus.rand_on_circle(
(0.0, 0.0), PARTICLE_SPEED_FAST),
lifetime=DEFAULT_PARTICLE_LIFETIME,
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_20.__doc__, e
def emitter_4():
"""Burst, emit on circle"""
e = arcadeplus.Emitter(
center_xy=CENTER_POS,
emit_controller=arcadeplus.EmitBurst(BURST_PARTICLE_COUNT),
particle_factory=lambda emitter: arcadeplus.LifetimeParticle(
filename_or_texture=TEXTURE,
change_xy=arcadeplus.rand_in_circle(
(0.0, 0.0), PARTICLE_SPEED_SLOW),
lifetime=DEFAULT_PARTICLE_LIFETIME,
center_xy=arcadeplus.rand_on_circle((0.0, 0.0), 100),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_4.__doc__, e
def emitter_17():
"""Interval, emit on circle"""
e = arcadeplus.Emitter(
center_xy=CENTER_POS,
emit_controller=arcadeplus.EmitterIntervalWithTime(
DEFAULT_EMIT_INTERVAL, DEFAULT_EMIT_DURATION),
particle_factory=lambda emitter: arcadeplus.LifetimeParticle(
filename_or_texture=TEXTURE,
change_xy=arcadeplus.rand_in_circle(
(0.0, 0.0), PARTICLE_SPEED_SLOW),
lifetime=DEFAULT_PARTICLE_LIFETIME,
center_xy=arcadeplus.rand_on_circle((0.0, 0.0), 100),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_17.__doc__, e
def make_interval_emitter(center_xy: Point,
filenames_and_textures: Sequence[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: Type[
arcadeplus.LifetimeParticle] = arcadeplus.LifetimeParticle
if fade_particles:
particle_factory = arcadeplus.FadeParticle
return arcadeplus.Emitter(
center_xy=center_xy,
emit_controller=arcadeplus.EmitterIntervalWithTime(
emit_interval, emit_duration),
particle_factory=lambda emitter: particle_factory(
filename_or_texture=random.choice(filenames_and_textures),
change_xy=arcadeplus.rand_on_circle((0.0, 0.0), particle_speed),
lifetime=random.uniform(particle_lifetime_min,
particle_lifetime_max),
scale=particle_scale))
def test_rand_on_circle():
"""Smoke test"""
arcadeplus.rand_on_circle((10.0, 20.0), 15.5)