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Lua Game Development Cookbook

You're reading from   Lua Game Development Cookbook Over 70 recipes that will help you master the elements and best practices required to build a modern game engine using Lua

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Product type Paperback
Published in Jul 2015
Publisher
ISBN-13 9781849515504
Length 360 pages
Edition 1st Edition
Languages
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Author (1):
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Mário Kašuba Mário Kašuba
Author Profile Icon Mário Kašuba
Mário Kašuba
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Toc

Table of Contents (11) Chapters Close

Preface 1. Basics of the Game Engine 2. Events FREE CHAPTER 3. Graphics – Common Methods 4. Graphics – Legacy Method with OpenGL 1.x–2.1 5. Graphics – Modern Method with OpenGL 3.0+ 6. The User Interface 7. Physics and Game Mechanics 8. Artificial Intelligence 9. Sounds and Networking Index

Sending messages to many hosts at once


There might be a case when you'd like to send a single message to multiple hosts at the same time. A typical example of such a situation can be a chat application. The ZeroMQ library solves this problem with the Publisher-Subscriber model, which is similar to a well-known multicast. Multiple types of messages can be divided into topics identified by a simple string value.

Do note that with the Publisher-Subscriber model, you can send messages only from the publisher to the subscriber, not the other way round.

Getting ready

For this recipe, you'll be using one publisher part and at least one subscriber. You can run more subscriber instances to see the effect of this network model.

How to do it…

This recipe will be divided into two parts, one for the publisher and the other for the subscriber.

The publisher part

Let's take a look at the publisher recipe:

  1. First you'll need to prepare the ZeroMQ socket for the publisher:

    local zmq = require 'zmq'
    local context...
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