Generating premade rooms in random sequence.

I'm currently working on a platformer rogue-like game but the thing I'm struggling with is generating the rooms in random sequence. All my rooms are premade but I want then to be generated in random sequence and connect properly.

The rooms can be made of left/right entrance but sometimes also up/down or both up & down. They shouldn't repeat also. The thing is, how do I make them all connect properly and prevent the existence of entrances leading to nowhere? Some examples would be really appreciated.

You probably want to look into procedural tilemap generation. There's lots of way to do it and the general idea can be translated fairly easily into many engines/programming languages.

https://www.scirra.com/tutorials/1112/procedural-dungeon-generation-a-roguelike-game Seems like a good start but it doesn't use tilemaps.

I recommend you look into how you'd code it to fully understand. Tilemaps and arrays go together really well because they both are conceptually a grid.

Put simply, it moves across each tile in a sequence and applies actions to each tile based on a bunch of conditions you set. If you set the right conditions and actions you'll end up with what you want.

Edit: This looks like maybe a better tutorial https://www.scirra.com/tutorials/1123/smarter-procedural-roguelike-dungeon

I'm not sure if that will help me, maybe I'm too newbie in this kind of stuff, but I will try to explain again. My rooms aren't based off grid tiles and they are all premade by me, all on separate layouts. Some of them have left/right entrances, some of them have up/down entrances, and some of them have left, right and up etc. just like Rogue Legacy for example. And my problem is, I don't know how to connect all those rooms based on the entrances, so there are no entrances going to nowhere and everything connects in a smart way. So I want to have rooms created by me be generated in random sequence with every run.

Hi —

So, if you want to leave a room by the right, you need a way of seeing a list of rooms with entrances on the left but which haven't already been used in your game?

Could you create some arrays - rooms with left entrances, rooms with right entrances etc. and then use the randomize function to select a particular qualifying room?