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Beginning C++ Game Programming

You're reading from   Beginning C++ Game Programming Learn C++ from scratch and get started building your very own games

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Product type Paperback
Published in Oct 2016
Publisher Packt
ISBN-13 9781786466198
Length 520 pages
Edition 1st Edition
Languages
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Author (1):
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John Horton John Horton
Author Profile Icon John Horton
John Horton
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Toc

Table of Contents (18) Chapters Close

Preface 1. C++, SFML, Visual Studio, and Starting the First Game FREE CHAPTER 2. Variables, Operators, and Decisions ā€“ Animating Sprites 3. C++ Strings, SFML Time, Player Input, and HUD 4. Loops, Arrays, Switch, Enumerations, and Functions ā€“ Implementing Game Mechanics 5. Collisions, Sound, and End Conditions ā€“ Making the Game Playable 6. Object-Oriented Programming, Classes, and SFML Views 7. C++ References, Sprite Sheets, and Vertex Arrays 8. Pointers, the Standard Template Library, and Texture Management 9. Collision Detection, Pickups, and Bullets 10. Layering Views and Implementing the HUD 11. Sound Effects, File I/O, and Finishing the Game 12. Abstraction and Code Management ā€“ Making Better Use of OOP 13. Advanced OOP ā€“ Inheritance and Polymorphism 14. Building Playable Levels and Collision Detection 15. Sound Spatialization and HUD 16. Extending SFML Classes, Particle Systems, and Shaders 17. Before you go...

Random numbers


Random numbers are useful for lots of reasons in games. Perhaps you could use them for determining what card the player is dealt, or how much damage within a certain range is subtracted from an enemy's health. As hinted at, we will use random numbers to determine the starting location and the speed of the bee and the clouds.

Generating random numbers in C++

To generate random numbers we will need to use some more C++ functions, two more to be precise. Don't add any code to the game yet. Let's just take a look at the syntax and the steps required with some hypothetical code.

Computers can't actually pick random numbers. They can only use algorithms/calculations to pick a number that appears to be random. So that this algorithm doesn't constantly return the same value, we must seed the random number generator. The seed can be any integer number, although it must be a different seed each time you require a unique random number. Take a look at this code, which seeds the random number...

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