# Instruction and Game Over Screens¶

instruction_and_game_over_screens.py
  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 """ This program shows how to: * Have one or more instruction screens * Show a 'Game over' text and halt the game * Allow the user to restart the game If Python and Arcade are installed, this example can be run from the command line with: python -m arcade.examples.instruction_and_game_over_screens """ import arcade import random import os SPRITE_SCALING = 0.5 SCREEN_WIDTH = 800 SCREEN_HEIGHT = 600 # These numbers represent "states" that the game can be in. INSTRUCTIONS_PAGE_0 = 0 INSTRUCTIONS_PAGE_1 = 1 GAME_RUNNING = 2 GAME_OVER = 3 class MyGame(arcade.Window): """ Main application class. """ def __init__(self, screen_width, screen_height): """ Constructor """ # Call the parent constructor. Required and must be the first line. super().__init__(screen_width, screen_height) # Set the working directory (where we expect to find files) to the same # directory this .py file is in. You can leave this out of your own # code, but it is needed to easily run the examples using "python -m" # as mentioned at the top of this program. file_path = os.path.dirname(os.path.abspath(__file__)) os.chdir(file_path) # Set the background color arcade.set_background_color(arcade.color.AMAZON) # Start 'state' will be showing the first page of instructions. self.current_state = INSTRUCTIONS_PAGE_0 self.player_list = None self.coin_list = None # Set up the player self.score = 0 self.player_sprite = None # STEP 1: Put each instruction page in an image. Make sure the image # matches the dimensions of the window, or it will stretch and look # ugly. You can also do something similar if you want a page between # each level. self.instructions = [] texture = arcade.load_texture("images/instructions_0.png") self.instructions.append(texture) texture = arcade.load_texture("images/instructions_1.png") self.instructions.append(texture) def setup(self): """ Set up the game. """ # Sprite lists self.player_list = arcade.SpriteList() self.coin_list = arcade.SpriteList() # Set up the player self.score = 0 self.player_sprite = arcade.Sprite("images/character.png", SPRITE_SCALING) self.player_sprite.center_x = 50 self.player_sprite.center_y = 50 self.player_list.append(self.player_sprite) for i in range(50): # Create the coin instance coin = arcade.Sprite("images/coin_01.png", SPRITE_SCALING / 3) # 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) # Don't show the mouse cursor self.set_mouse_visible(False) # STEP 2: Add this function. def draw_instructions_page(self, page_number): """ Draw an instruction page. Load the page as an image. """ page_texture = self.instructions[page_number] arcade.draw_texture_rectangle(SCREEN_WIDTH // 2, SCREEN_HEIGHT // 2, page_texture.width, page_texture.height, page_texture, 0) # STEP 3: Add this function def draw_game_over(self): """ Draw "Game over" across the screen. """ output = "Game Over" arcade.draw_text(output, 240, 400, arcade.color.WHITE, 54) output = "Click to restart" arcade.draw_text(output, 310, 300, arcade.color.WHITE, 24) # STEP 4: Take the drawing code you currently have in your # on_draw method AFTER the start_render call and MOVE to a new # method called draw_game. def draw_game(self): """ Draw all the sprites, along with the score. """ # Draw all the sprites. self.player_list.draw() self.coin_list.draw() # Put the text on the screen. output = f"Score: {self.score}" arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14) # STEP 5: Update the on_draw function to look like this. Adjust according # to the number of instruction pages you have. def on_draw(self): """ Render the screen. """ # This command has to happen before we start drawing arcade.start_render() if self.current_state == INSTRUCTIONS_PAGE_0: self.draw_instructions_page(0) elif self.current_state == INSTRUCTIONS_PAGE_1: self.draw_instructions_page(1) elif self.current_state == GAME_RUNNING: self.draw_game() else: self.draw_game() self.draw_game_over() # STEP 6: Do something like adding this to your on_mouse_press to flip # between instruction pages. def on_mouse_press(self, x, y, button, modifiers): """ Called when the user presses a mouse button. """ # Change states as needed. if self.current_state == INSTRUCTIONS_PAGE_0: # Next page of instructions. self.current_state = INSTRUCTIONS_PAGE_1 elif self.current_state == INSTRUCTIONS_PAGE_1: # Start the game self.setup() self.current_state = GAME_RUNNING elif self.current_state == GAME_OVER: # Restart the game. self.setup() self.current_state = GAME_RUNNING def on_mouse_motion(self, x, y, dx, dy): """ Called whenever the mouse moves. """ # Only move the user if the game is running. if self.current_state == GAME_RUNNING: self.player_sprite.center_x = x self.player_sprite.center_y = y # STEP 7: Only update if the game state is GAME_RUNNING like below: def update(self, delta_time): """ Movement and game logic """ # Only move and do things if the game is running. if self.current_state == GAME_RUNNING: # Call update on all sprites (The sprites don't do much in this # example though.) self.coin_list.update() self.player_list.update() # Generate a list of all sprites that collided with the player. 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 hit_list: coin.kill() self.score += 1 # If we've collected all the games, then move to a "GAME_OVER" # state. if len(self.coin_list) == 0: self.current_state = GAME_OVER self.set_mouse_visible(True) def main(): MyGame(SCREEN_WIDTH, SCREEN_HEIGHT) arcade.run() if __name__ == "__main__": main()