def emitter_36():
"""Moving emitter. Particles spawn relative to emitter."""
class MovingEmitter(arcade.Emitter):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.elapsed = 0.0
def update(self):
super().update()
self.elapsed += 1 / 60
self.center_x = sine_wave(self.elapsed, 0, SCREEN_WIDTH, SCREEN_WIDTH / 100)
self.center_y = sine_wave(self.elapsed, 0, SCREEN_HEIGHT, SCREEN_HEIGHT / 100)
e = MovingEmitter(
center_xy=CENTER_POS,
emit_controller=arcade.EmitInterval(0.005),
particle_factory=lambda emitter: arcade.FadeParticle(
filename_or_texture=TEXTURE,
change_xy=arcade.rand_in_circle((0.0, 0.0), 0.1),
lifetime=random.uniform(1.5, 5.5),
scale=random.uniform(0.05, 0.2)
)
)
return emitter_36.__doc__, e
def emitter_12():
"""Infinite emitting w/ eternal particle"""
e = arcade.Emitter(
pos=CENTER_POS,
emit_controller=arcade.EmitInterval(0.02),
particle_factory=lambda emitter: arcade.EternalParticle(
filename_or_texture=TEXTURE,
vel=arcade.rand_in_circle(Vec2d.zero(), PARTICLE_SPEED_FAST),
scale=DEFAULT_SCALE,
alpha=DEFAULT_ALPHA))
return emitter_12.__doc__, e
def __init__(self):
self.w = 600
self.h = 600
arcade.Window.__init__(self, self.w, self.h, "Particles!")
arcade.set_background_color(arcade.color.EERIE_BLACK)
# Sprite for particle from image (try changing to other item numbers! 17 is hearts!)
self.text_blue = arcade.load_texture(
"Sprites/PNG/Items/platformPack_item001.png")
# Sprite for particle pregenerated
self.text_red = arcade.make_soft_circle_texture(20, arcade.color.RED)
self.text_green = arcade.make_soft_square_texture(
50, arcade.color.GREEN, 200, 150)
# Timer for cosine/sine purposes later
self.timer = 0
# Empty list to store our emitters for easy drawing and updating
self.emitters = []
# Make the center, moving emitter
self.fountain = arcade.Emitter(
center_xy=(self.w / 2, self.h / 2), # Position
emit_controller=arcade.EmitInterval(
0.01), # When to make more particles
particle_factory=lambda emitter: arcade.
FadeParticle( # Type of particle
filename_or_texture=self.text_blue, # Particle texture
change_xy=arcade.rand_in_circle(
(0, 0), 4.5), # Particle velocity
lifetime=1.0, # Particle lifetime
scale=0.5, # Particle scaling
),
)
self.cursor = arcade.Emitter(
center_xy=(self.w / 2, self.h / 2),
emit_controller=arcade.EmitMaintainCount(
30), # Alway keep 30 on screen
particle_factory=lambda emitter: arcade.
LifetimeParticle( # Stay bright till end
filename_or_texture=self.text_red,
change_xy=(random.uniform(-1, 1), random.uniform(-1, 1)),
lifetime=random.random(
), # die out at random times, or else this looked weird
scale=1,
),
)
# Add our current, always-on emitters to the list
self.emitters.extend([self.fountain, self.cursor])
def __init__(self, center_position: Tuple[float, float]):
"""
:param center_position: tuple of x and y coordinates
"""
super().__init__(
center_xy=center_position,
emit_controller=arcade.EmitInterval(0.003),
particle_factory=lambda emitter: arcade.LifetimeParticle(
filename_or_texture=
":resources:images/pinball/pool_cue_ball.png",
change_xy=arcade.rand_vec_spread_deg(180, 25, 1.0),
lifetime=random.uniform(self.PARTICLE_LIFETIME - 1.0, self.
PARTICLE_LIFETIME),
scale=0.1,
alpha=32))
