Tessellation problem

hi everyone… i’ve tried in any way to write the right things to do a tessellation but it doesn’t work… i saw many many examples but i don’t understand where i wrong…pls can someone write me the code to do a tessellation of a non-convex polygon?? i really need your help…
hope someone will help me!

If you have seen many examples but still can’t get it to work I don’t think another example would help, if you instead take one of your examples and try to make it work it would be simpler.

Could you try to explain what the problem is with the examples you have ? do they compile ? what happens when you run them ?

Complete documentation can be found at:
Red book ch. 12