Arcade收集硬币例子

"""
Sprite Collect Coins

Simple program to show basic sprite usage.

Artwork from https://kenney.nl

If Python and Arcade are installed, this example can be run from the command line with:
python -m arcade.examples.sprite_collect_coins
"""

import random
import arcade

# --- Constants ---
SPRITE_SCALING_PLAYER = 0.5
SPRITE_SCALING_COIN = .25
COIN_COUNT = 50

SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "Sprite Collect Coins Example"


class MyGame(arcade.Window):
    """ Our custom Window Class"""

    def __init__(self):
        """ Initializer """
        # Call the parent class initializer
        super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)

        # Variables that will hold sprite lists
        self.player_list = None
        self.coin_list = None

        # Set up the player info
        self.player_sprite = None
        self.score = 0

        # Don't show the mouse cursor
        self.set_mouse_visible(False)

        arcade.set_background_color(arcade.color.AMAZON)

    def setup(self):
        """ Set up the game and initialize the variables. """

        # Sprite lists
        self.player_list = arcade.SpriteList()
        self.coin_list = arcade.SpriteList()

        # Score
        self.score = 0

        # Set up the player
        # Character image from kenney.nl
        img = ":resources:images/animated_characters/female_person/femalePerson_idle.png"
        self.player_sprite = arcade.Sprite(img, SPRITE_SCALING_PLAYER)
        self.player_sprite.center_x = 50
        self.player_sprite.center_y = 50
        self.player_list.append(self.player_sprite)

        # Create the coins
        for i in range(COIN_COUNT):

            # Create the coin instance
            # Coin image from kenney.nl
            coin = arcade.Sprite(":resources:images/items/coinGold.png",
                                 SPRITE_SCALING_COIN)

            # Position the coin
            coin.center_x = random.randrange(SCREEN_WIDTH)
            coin.center_y = random.randrange(SCREEN_HEIGHT)

            # Add the coin to the lists
            self.coin_list.append(coin)

    def on_draw(self):
        """ Draw everything """
        self.clear()
        self.coin_list.draw()
        self.player_list.draw()

        # Put the text on the screen.
        output = f"Score: {self.score}"
        arcade.draw_text(text=output, start_x=10, start_y=20,
                         color=arcade.color.WHITE, font_size=14)

    def on_mouse_motion(self, x, y, dx, dy):
        """ Handle Mouse Motion """

        # Move the center of the player sprite to match the mouse x, y
        self.player_sprite.center_x = x
        self.player_sprite.center_y = y

    def on_update(self, delta_time):
        """ Movement and game logic """

        # Generate a list of all sprites that collided with the player.
        coins_hit_list = arcade.check_for_collision_with_list(self.player_sprite,
                                                              self.coin_list)

        # Loop through each colliding sprite, remove it, and add to the score.
        for coin in coins_hit_list:
            coin.remove_from_sprite_lists()
            self.score += 1


def main():
    """ Main function """
    window = MyGame()
    window.setup()
    arcade.run()


if __name__ == "__main__":
    main()

本程序是一个基本的精灵使用示例。它演示了如何在Arcade中创建和操作精灵。程序的目标是让玩家移动一个精灵来收集散落在屏幕上的硬币。

首先，程序导入了所需的包和模块。其中包括了Arcade和random模块。

程序定义了一些常量，如玩家精灵的缩放比例、硬币精灵的缩放比例和硬币数量。还定义了屏幕的宽度和高度以及窗口标题。

然后，程序创建了一个自定义的窗口类MyGame，继承自Arcade的Window类。在初始化过程中，程序设置了窗口的宽度、高度和标题，并初始化了玩家精灵列表和硬币精灵列表，以及玩家精灵和分数变量。程序还设置了背景颜色和隐藏了鼠标光标。

在setup()方法中，程序设置了玩家精灵的初始位置和角色图像，以及硬币精灵的位置和图像。这是通过随机生成硬币的位置来实现的。

在on_draw()方法中，程序使用arcade.draw_text()函数在屏幕上显示分数，并使用coin_list.draw()和player_list.draw()方法绘制硬币列表和玩家精灵列表。

在on_mouse_motion()方法中，程序根据鼠标的移动来移动玩家精灵的位置。

在on_update()方法中，程序检测玩家精灵与硬币精灵是否碰撞，如果有碰撞，则将硬币精灵从列表中移除，并将分数加一。

最后，程序定义了一个main()函数来初始化窗口和运行游戏。

如果直接运行这个程序，Arcade会创建一个窗口并显示游戏。玩家可以使用鼠标来控制玩家精灵的移动，并收集屏幕上的硬币。每收集一个硬币，分数就会增加一。