Procedural generation : door problem

Hello,

im interested in learning things about procedural generation.

i made a little test, using this tutorial:

https://www.scirra.com/tutorials/1112/p ... elike-game

then i tried to improve it, and i tried to implement some doors.

but i can find a way to place them correctly, and i think its because im not good enough at maths

and/or lack of "programming grammar"

i would really appreciate if somebody look at this to give me some advices

here is my project :

https://drive.google.com/open?id=0B9EpC ... 0xJZm9pMDA

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and if you know about good ressources i can use to improve my comprehension of procedural generation, i'll take any tutorials or capx available...

(unfortunately i only have a mac here, so i'm bound to C3 projects)

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thanks a lot !