By Jim Sager, james_sager3@yahoo.com.
After compiling the engine, run the demo: simple2. You will notice that you are in a room, and inside the room there is a 3d block with some markings on it. We'll be modifying the code to demonstrate the different tools you have available.
Step #1: Delete the program simple2
Step #2: Type: Make X tutsimp2 (if you're using linux, you'd type: make linux tutsimp2)
Step #3: Run the demo simple2
If you are able to do the above steps, you are now able to start modifying the code.