|
Programming Paradigms |
|
Lab 8. Lazy evaluation in Haskell |
Outline
- ● Side-scrolling game
- ● Rotating background
- ● Working with an infinite universe
- ● Generating random infinite universe
A starry background
Exercise 6.1.
Use the following code snippet and add some stars to background picture. https://code.world/haskell#P2vslEkap0OnUffMXjkd7tg
Exercise 6.2.
Improve on exercise 6.1 by introducing an explicit list of star positions and a function that generates a background with a given arrangement of stars.
Rotating backgrounds
Exercise 6.3.
Introduce two variations of background with different arrangements of stars. The backgrounds should rotate: start with background 1, then next should be background 2, then background 1, then again background 2, etc.
Exercise 6.4.
Add a list of star arrangements to the state of the game. Render those as consecutive backgrounds. Do not forget to update the list when a background flies too far into the past.
An infinite universe
Exercise 6.5.
Define an infinite list of star arrangements and use it in the game state. Make sure to use only a finite portion for rendering.
Exercise 6.6.
Define a function chunksOf :: Int -> [a] -> [[a]]
that splits a list into chunks (of given size) of consecutive elements.
An random universe
Exercise 6.7.
Use the functions randomRs and mkStdGen (from System.Random) to generate an infinite list of random star positions.
Exercise 6.8.
Generate an infinite universe without repeating backgrounds.
