Dungeon generator: Alignment of static rooms

[Silly_Jellyfish]

Godot Version

4.2.1.stable.official[b09f793f5]

Question: How to rotate and reposition multiple groups of meshes to specific “room exits” ?

Hi everyone ! I want to implement a dungeon generator into my game with static rooms that get mixed together. I am following this guide: https://gamedevelopment.tutsplus.com/bake-your-own-3d-dungeons-with-procedural-recipes--gamedev-14360t

My rooms consists of MeshInstances as Tiles of the same size and a Node3Ds as parents. Now I want to align them together randomly. In the guide they are using Position Markers on the exits. Is there an equal way I could do this in Godot ? I am struggling to find a way to have those Exit Markers in my Rooms and even perfectly aligned .. also do I rotate each MeshInstance on its own or only the Parent Node3D e.g. “RoomTemplate” (Screenshot) ? (Also for putting together my meshes I use a specific snap addon “Snappy”)

How it is visualized in the Guide:

[Silly_Jellyfish]

My solution was to do some vector math. Substracting the two origin vectors of the Rooms and applying it to one room so the rooms will have the same origin and then substracting the Vectors of some two exit vectors of each room. Then substracting this difference from the room I want to move. The Exits are like the floor tiles placed and so I add or substract the aabb.size (add/sub and x or z depending on north/south or west/east) * 2 to the previously mentioned vector difference so that the tiles wont overlap.