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158 | import arcade
SPRITE_SCALING = 0.5
SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "Easing Example"
class Player(arcade.Sprite):
""" Player class """
def __init__(self, image, scale):
""" Set up the player """
# Call the parent init
super().__init__(image, scale)
self.easing_angle_data = None
self.easing_x_data = None
self.easing_y_data = None
def on_update(self, delta_time: float = 1 / 60):
if self.easing_angle_data is not None:
done, self.angle = arcade.ease_angle_update(self.easing_angle_data, delta_time)
if done:
self.easing_angle_data = None
if self.easing_x_data is not None:
done, self.center_x = arcade.ease_update(self.easing_x_data, delta_time)
if done:
self.easing_x_data = None
if self.easing_y_data is not None:
done, self.center_y = arcade.ease_update(self.easing_y_data, delta_time)
if done:
self.easing_y_data = None
class MyGame(arcade.Window):
""" Main application class. """
def __init__(self, width, height, title):
""" Initializer """
# Call the parent class initializer
super().__init__(width, height, title)
# Variables that will hold sprite lists
self.player_list = None
# Set up the player info
self.player_sprite = None
# Set the background color
self.background_color = arcade.color.BLACK
self.text = "Test"
def setup(self):
""" Set up the game and initialize the variables. """
# Sprite lists
self.player_list = arcade.SpriteList()
# Set up the player
self.player_sprite = Player(":resources:images/space_shooter/playerShip1_orange.png",
SPRITE_SCALING)
self.player_sprite.angle = 0
self.player_sprite.center_x = SCREEN_WIDTH / 2
self.player_sprite.center_y = SCREEN_HEIGHT / 2
self.player_list.append(self.player_sprite)
def on_draw(self):
""" Render the screen. """
# This command has to happen before we start drawing
self.clear()
# Draw all the sprites.
self.player_list.draw()
arcade.draw_text(self.text, 10, 10, arcade.color.WHITE, 18)
def on_update(self, delta_time):
""" Movement and game logic """
# Call update on all sprites (The sprites don't do much in this
# example though.)
self.player_list.on_update(delta_time)
def on_key_press(self, key, modifiers):
x = self.mouse["x"]
y = self.mouse["y"]
if key == arcade.key.KEY_1:
point = x, y
self.player_sprite.face_point(point)
self.text = "Instant angle change"
if key in [arcade.key.KEY_2, arcade.key.KEY_3, arcade.key.KEY_4, arcade.key.KEY_5]:
p1 = self.player_sprite.position
p2 = (x, y)
end_angle = -arcade.get_angle_degrees(p1[0], p1[1], p2[0], p2[1])
start_angle = self.player_sprite.angle
if key == arcade.key.KEY_2:
ease_function = arcade.linear
self.text = "Linear easing - angle"
elif key == arcade.key.KEY_3:
ease_function = arcade.ease_in
self.text = "Ease in - angle"
elif key == arcade.key.KEY_4:
ease_function = arcade.ease_out
self.text = "Ease out - angle"
elif key == arcade.key.KEY_5:
ease_function = arcade.smoothstep
self.text = "Smoothstep - angle"
else:
raise ValueError("?")
self.player_sprite.easing_angle_data = arcade.ease_angle(start_angle,
end_angle,
rate=180,
ease_function=ease_function)
if key in [arcade.key.KEY_6, arcade.key.KEY_7, arcade.key.KEY_8, arcade.key.KEY_9]:
p1 = self.player_sprite.position
p2 = (x, y)
if key == arcade.key.KEY_6:
ease_function = arcade.linear
self.text = "Linear easing - position"
elif key == arcade.key.KEY_7:
ease_function = arcade.ease_in
self.text = "Ease in - position"
elif key == arcade.key.KEY_8:
ease_function = arcade.ease_out
self.text = "Ease out - position"
elif key == arcade.key.KEY_9:
ease_function = arcade.smoothstep
self.text = "Smoothstep - position"
else:
raise ValueError("?")
ex, ey = arcade.ease_position(p1, p2, rate=180, ease_function=ease_function)
self.player_sprite.easing_x_data = ex
self.player_sprite.easing_y_data = ey
def on_mouse_press(self, x: float, y: float, button: int, modifiers: int):
self.player_sprite.face_point((x, y))
def main():
""" Main function """
window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)
window.setup()
arcade.run()
if __name__ == "__main__":
main()
|