Book Image

OpenNI Cookbook

By : Soroush Falahati
Book Image

OpenNI Cookbook

By: Soroush Falahati

Overview of this book

The release of Microsoft Kinect, then PrimeSense Sensor, and Asus Xtion opened new doors for developers to interact with users, re-design their application’s UI, and make them environment (context) aware. For this purpose, developers need a good framework which provides a complete application programming interface (API), and OpenNI is the first choice in this field. This book introduces the new version of OpenNI. "OpenNI Cookbook" will show you how to start developing a Natural Interaction UI for your applications or games with high level APIs and at the same time access RAW data from different sensors of different hardware supported by OpenNI using low level APIs. It also deals with expanding OpenNI by writing new modules and expanding applications using different OpenNI compatible middleware, including NITE. "OpenNI Cookbook" favors practical examples over plain theory, giving you a more hands-on experience to help you learn. OpenNI Cookbook starts with information about installing devices and retrieving RAW data from them, and then shows how to use this data in applications. You will learn how to access a device or how to read data from it and show them using OpenGL, or use middleware (especially NITE) to track and recognize users, hands, and guess the skeleton of a person in front of a device, all through examples.You also learn about more advanced aspects such as how to write a simple module or middleware for OpenNI itself. "OpenNI Cookbook" shows you how to start and experiment with both NIUI designs and OpenNI itself using examples.
Table of Contents (14 chapters)
OpenNI Cookbook
About the Author
About the Reviewers

Finding the related user ID for each hand ID

When dealing with nite::HandTracker and nite::HandData, there is no way to find out which hand belongs to which user. Actually, there is no direct way of finding this out in NiTE at all. In this recipe, we will show you how it's possible to use nite::UserTracker and nite::UserMap along with nite::HandTracker and nite::HandData to determine the user ID of each hand.

Getting ready

Create a project in Visual Studio and prepare it for working with OpenNI and NiTE using the Create a project in Visual Studio 2010 recipe in Chapter 2, OpenNI and C++.

How to do it...

  1. Copy ReadLastCharOfLine() and HandleStatus() from the first recipe of this chapter to the top of your source code (just below the #include lines).

  2. Then, locate the following line:

    int _tmain(int argc, _TCHAR* argv[])
  3. Add the following code inside the preceding line:

      nite::Status status = nite::STATUS_OK;
      status = nite::NiTE::initialize();
      if (!HandleStatus(status)) return 1;