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SFML Game Development By Example

You're reading from   SFML Game Development By Example Create and develop exciting games from start to finish using SFML

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Product type Paperback
Published in Dec 2015
Publisher
ISBN-13 9781785287343
Length 522 pages
Edition 1st Edition
Languages
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Author (1):
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Raimondas Pupius Raimondas Pupius
Author Profile Icon Raimondas Pupius
Raimondas Pupius
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Toc

Table of Contents (16) Chapters Close

Preface 1. It's Alive! It's Alive! – Setup and First Program 2. Give It Some Structure – Building the Game Framework FREE CHAPTER 3. Get Your Hands Dirty – What You Need to Know 4. Grab That Joystick – Input and Event Management 5. Can I Pause This? – Application States 6. Set It in Motion! – Animating and Moving around Your World 7. Rediscovering Fire – Common Game Design Elements 8. The More You Know – Common Game Programming Patterns 9. A Breath of Fresh Air – Entity Component System Continued 10. Can I Click This? – GUI Fundamentals 11. Don't Touch the Red Button! – Implementing the GUI 12. Can You Hear Me Now? – Sound and Music 13. We Have Contact! – Networking Basics 14. Come Play with Us! – Multiplayer Subtleties Index

Standard function wrapper

The C++ utilities library provides us with just what we need in order to solve this pickle elegantly: std::function and std::bind. The std::function type is a general purpose polymorphic function wrapper. Amongst many other things it supports, it can store the member function pointers and call them. Let's take a look at a minimal example of using it:

#include <functional> // Defines std::function & std::bind.
...
std::function<void(void)> foo = std::bind(&Bar::method1, this);

In this case, we're instantiating a function wrapper called "foo", which holds a function with the signature void(void). On the right side of the equals sign, we use std::bind to bind the member function "method1" of the class "Bar" to the foo object. The second argument, because this is a member function pointer, is the instance of the class that is having its method registered as a callback. In this case, it has to be an instance...

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