How to hack OpenNi Framework

Question

I downloaded OpenNi's framework code source, Its ofcourse include c++ files and codes, so the question is How do I understand that code and framework?
How can I understand embedded logic which Works with Sensor?
How can I develop some other middlewares myself?
Which place that I should look first?

Answer 1

Your question is too wide to be answered properly but I'll give you a place to start:

Take a look at OpenNI's "get started" and reference guide (http://www.openni.org/resources/)

The simplest way to get started is to compile the enclosed examples and work your way through them to understand how the communication with the sensor is set up.