Laboratory 10

Laboratory 10
Due at the end of today's class

A Simple Game Graphic

In this lab, you will create a game window with a graphic background. A sprite will move in a square pattern on the background.

Before you begin, download the following images into the same folder that will have your python program in it. (You can download an image by right-clicking and choosing "Save image" from the menu).

Writing the main program
Start by importing the games package from livewires:

from livewires import games

Next, write a main program that does the following:

Create a game window with screen_width = 800, screen_height = 438 and fps = 50)
Load in the "super_mario_scene.jpg" image that you downloaded from above.
Set the game.screen.background to be the image that you loaded in.
Load in the "mario.gif" image that you downloaded from above.
Create a sprite (games.Sprite) that uses this mario image as its image, the x position is games.screen.width/2, the y position is games.screen.height/2, the dx value is 1 and the dy value is 0.
Add this sprite to the game screen
Run the screen mainloop.

The above program should create a Mario character on the background image. The Mario sprite will move to the right until it disappears off the edge of the screen.

Writing the Mario class.
Next, write a Mario class. The class definition should come immediately after the "from livewires import games" line and before the main program. This class should inherit from the Sprite class, so your class should begin with the line:

class Mario(games.Sprite): Your Mario class should have a single function, named update, as follows:

def update(self): The update function will cause the Mario sprite to move in a square, using the following logic:

If Mario is moving right (self.dx == 1), and the x position is >= 500, set self.dx to zero and self.dy to -1 (the sprite moves up).
If Mario is moving up (self.dy == -1) and the y position is <= 120, set self.dx to -1 and self.dy to zero (the sprite moves left)
If Mario is moving left (self.dx == -1) and the x position is <= 300, set self.dx to zero and self.dy to 1 (moving down).
If Mario is moving down (self.dy == 1) and the y position is >= 320, set self.dx to 1 and self.dy to zero (moving right).
Use the if..elif..elif..elif construction to write the above conditions.

Once the class is written, change the sprite in the main program so that it is an object of type Mario (instead of games.Sprite).

Test your program. If correct, the Mario sprite should move in a square on the screen background.

What To Turn In.

A printed listing of the final program. Be sure that your name is in the program prologue’s comment section of the program.

Reminder.

Be sure to save a copy of each program on your P:\ drive.