July 2015
Beginner
380 pages
9h 17m
English
Content preview from Swift Game Programming for Absolute BeginnersBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 20
Interaction Between Game Objects
In this chapter, you are going to program the main gameplay for the Penguin Pairs game. You will learn how to move penguins around on the board and what to do when a penguin collides with another game object, such as a shark or another penguin.
Defining Operators
Since you will be dealing with moving and colliding penguins, you will be doing quite a lot of calculations with two-dimensional points and vectors (represented by CGPoint instances). At the moment, computing things with these points is a bit of a hassle. For example, in the LevelState class, this is how you have to position the Quit button:
quitButton.position = GameScreen.instance.topRightquitButton.position.x -= quitButton.center.x + 10 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.