Moving the Camera
Now we are going to create a new camera_move() function to move our camera with our player. Then we will call this function in our on_update() function.
camera_move(): Inside this function, we will calculate the x and y coordinates of the center of the camera according to our player’s position. Then we will move our camera with the help of the move_to() function.
Below is the implementation:
Python3
# Importing arcade module import arcade # Creating MainGame class class MainGame(arcade.Window): def __init__(self): super().__init__(600, 600, title="Player Movement") # Initializing a variable to store # the velocity of the player self.vel_x = 0 # Creating variable for Camera self.camera = None # Creating scene object self.scene = None # Creating variable to store player sprite self.player = None # Creating variable for our game engine self.physics_engine = None # Creating on_draw() function to draw on the screen def on_draw(self): arcade.start_render() # Using the camera self.camera.use() # Drawing our scene self.scene.draw() def setup(self): # Initialize Scene object self.scene = arcade.Scene() # Using Camera() function self.camera= arcade.Camera(200,200) # Creating different sprite lists self.scene.add_sprite_list("Player") self.scene.add_sprite_list("Platforms", use_spatial_hash=True) # Adding player sprite self.player_sprite = arcade.Sprite("Player.png", 1) # Adding coordinates for the center of the sprite self.player_sprite.center_x = 64 self.player_sprite.center_y = 600 #Adding Sprite in our scene self.scene.add_sprite("Player", self.player_sprite) # Adding platform sprite platform = arcade.Sprite("Platform.png", 1) # Adding coordinates for the center of the platform platform.center_x = 300 platform.center_y = 32 self.scene.add_sprite("Platforms", platform) # Creating Physics engine self.physics_engine = arcade.PhysicsEnginePlatformer( self.player_sprite, self.scene.get_sprite_list("Platforms"), 0.5 ) # Creating on_update function to # update the x coordinate def on_update(self,delta_time): # Changing x coordinate of player self.player_sprite.center_x += self.vel_x * delta_time # Updating the physics engine to move the player self.physics_engine.update() # Calling the camera_move function self.camera_move() # Creating function to change the velocity # when button is pressed def on_key_press(self, symbol,modifier): # Checking the button pressed # and changing the value of velocity if symbol == arcade.key.LEFT: self.vel_x = -300 elif symbol == arcade.key.RIGHT: self.vel_x = 300 # Creating function to change the velocity # when button is released def on_key_release(self, symbol, modifier): # Checking the button released # and changing the value of velocity if symbol == arcade.key.LEFT: self.vel_x = 0 elif symbol == arcade.key.RIGHT: self.vel_x = 0 def camera_move(self): # Getting the x coordinate for the center of camera screen_x = self.player_sprite.center_x - (self.camera.viewport_width / 2) # Getting the y coordinate for the center of camera screen_y = self.player_sprite.center_y - (self.camera.viewport_height / 2) # Moving the camera self.camera.move_to([screen_x, screen_y]) # Calling MainGame class game = MainGame() game.setup() arcade.run() |
Output:
Python Arcade – Adding Camera
In this article, we will learn How we can add cameras to arcade games in Python.
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