Not as much work has been done as I planned. The easiest part was adding windows to current rooms, simple detection of collision in the second pass and here we go. The more challenging was looking for a little bug in calculation of entrance, but from now on we won’t encounter a situation where doors are blocked by wall from another room :)

So to sum it up, the current process of house generation looks like:

1. Build space map

2. Randomize base floor with checking in space map

3. Check collisions of each room and add windows.

Here is how my space map looks like:

0 are free spaces
1 are occupied by room
2 represents an entrance that is not connected