Visualize the Kinect V1 camera boundaries / Field of View when working with point cloud

Hello Everyone

I a newbie to working with 3D and easyCam in OF.
Im working with the kinectExample, specifically the piece that visualizes the point cloud in 3d space.

Im trying to visualize the boundaries / field of view of the Kinect in 3D space.
Could someone please help me in:

  1. Understanding what information I need to accurately draw this?
  2. How to draw this in 3D space?

Thank you very much