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_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_6():
"""Burst, emit on line"""
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_on_line(Vec2d.zero(),
Vec2d(SCREEN_WIDTH, SCREEN_HEIGHT)),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_6.__doc__, e
def emitter_19():
"""Interval, emit on line"""
e = arcade.Emitter(
pos=Vec2d.zero(),
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_line(Vec2d.zero(),
Vec2d(SCREEN_WIDTH, SCREEN_HEIGHT)),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_19.__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 test_rand_on_line():
"""Smoke test"""
arcade.rand_on_line((-5.5, -2.2), (5.2, 14.7))
