Lesson 9 : Game Design Python 101
Presentation
•
Computers
•
9th Grade
•
Practice Problem
•
Easy
Maria Cruz Farooqi
Used 3+ times
FREE Resource
16 Slides • 22 Questions
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Creating a Sprite with Turtle
When working with Python's Turtle module, you can use a . In your Asteroids game, for example, the ship and the rocks were all sprites represented
So you can just
using
as we've done before.
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Setting a Sprite's Initial Values
You can set the sprite's so that it looks and behaves exactly as you want.
Often you'll want to use the
commands so that the sprite doesn't leave a trail and moves as fast as possible,
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Clone the Prototype
Once you've created one sprite and set its initial values in a way that you like, you can of the sprite by
In this way, your original sprite acts like
Any clones of the original will
In the example we create a prototype called sprite, then make two clones of it called actor1 and actor2 using the
method.
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What Are Game Loops?
Most games consist of a that are repeated constantly as the game is played.
These steps often include tasks like:
Setting and updating
(their location, whether to show or hide each sprite, and so forth)
Checking on important
(such as whether the game has been won or lost)
This is called a game loop. Let's see how
.
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This example shows the code to set up a game loop that updates
. Click Run to see the output. The background may appear to
, but the loop is setting the
every second.
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Another Game Loop
This example is similar to the previous one, except the now switches the background to a random color
.
Press
and see the background switch color.
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What is the interval of this game loop?
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Looping
The provides an effective way to loop through every entry
in Python. You can provide a list to a "for" loop
. Each time the "for" loop runs, the counter variable will be set
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Append
To add more to the list, you can use the
method. Check it out:
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Insert
Another important method is . It lets you insert an entry at any
in a list. Any entries at that location or after it will be pushed up one index.
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Pop
Pop( ) at any index on the list. It returns the value at the entry
.
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In
in is another when you're using lists. It checks if an element is
and returns True or
.
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Multiple Choice
Select correct answer:
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More on Dictionaries
To make more advanced games, you'll also need to know some for manipulating dictionaries.
Keys, Values, Items
The dictionary is a that consists of key-value pairs. You can examine each component of a dictionary separately or as
:
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The data returned by the values( ), keys( ), and items( ) commands cannot be edited. To change the data in a dictionary, you'll need some different commands.
Looping
You can through a dictionary in
ways.
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