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Snakes Pygame: Difference between revisions
→2. Give snakes the ability to move in all directions
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== Project ==
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== Goals ==
*
* practice
== Project setup ==
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=== 3. Give the game a better background ===
The game has a pretty boring solid color background. Spice it up by adding a background image. We've provided a sample background
Use [http://www.pygame.org/docs/ref/image.html#pygame.image.load pygame.image.load] to load the background. You'll need to re-display the background on every tick of the game, just like we currently do with the solid color using <code>game_surface.fill(BACKGROUND_COLOR)</code>.
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Test your changes by re-running the game and holding down the arrow key while moving your snake around.
=== 5.
Snake food is just a solid-colored square. Spice it up by using an image instead. We've provided a sample food image called <code>cherry.png</code> in the Snakes directory, but create and add your own if you want!
Currently, in the <code>Food</code> class <code>self.surface</code> is filled with a random color. Use [http://www.pygame.org/docs/ref/image.html#pygame.image.load pygame.image.load] to load and use the food image instead.
Test your changes by re-running the game and observing that your custom food image is used.
=== 6. Handle quit and restart key presses ===
I want to keep playing! So far, there's no way to quit (besides closing the window) or restart the game.
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Test your changes by re-running the game, running into the bad snake to end the game, and making sure you can restart.
==Bonus exercises==
=== 1. Play a sound when you eat food ===
We've included <code>ding.ogg</code> as a sample sound, but find and add your own if you want!
Test your changes by re-running the game with the sound on and observing that a noise is played when the snake eats pieces of food.
=== 2. Give yourself multiple lives ===
Typically in games you have multiple lives available. Give your snake 3 lives to start with, lose a life each time you run into yourself or the bad snake, and display how many lives remain in the upper left corner.
You may find it convenient to create a new file with a new class called <code>Lives</code> that keeps track of this game state and the work of updating the display.
===Congratulations!===
You've read, modified, and improved a game using Pygame that uses images and sound and game concepts like an event loop and managing keypresses. Keep practicing!
[[File:Fireworks.png|150px]]
[[File:Balloons.png|150px]]
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