Tracking hands

In this recipe, we are going to expand on the previous recipe and add hand tracking after recognizing a gesture. Moreover, we will also show the location of a hand in the screen overlying the depth frame data.

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++, and then configure Visual Studio to use OpenGL using the Configuring Visual Studio 2010 to use OpenGL recipe in Chapter 3, Using Low-level Data.

How to do it...

1. Define the window_w, window_h, and gl_texture variables on top of your source code, below the #include lines, just as with the other examples we wrote using OpenGL and GLUT.

2. Add the following code right below them:

   nite::HandTracker hTracker;

3. Copy ReadLastCharOfLine() and HandleStatus() from the first recipe of this chapter and paste it here. Also, copy gl_IdleCallback() from the Initialize and prepare OpenGL recipe in Chapter 3, Using Low...