Best way to spawn NPCs in random possible locations

[Wolfo]

As the title says, what's the best way to spawn NPCs in random possible locations? Avoiding them to spawn in walls.

[c👌de_g🎷]

Have a table of all the random location coordinates you want, then use math.random to select a table key.

[Wolfo]

[QUOTE=code_gs;46218003]Have a table of all the random location coordinates you want, then use math.random to select a table key.[/QUOTE]

That's not what I'm looking for though. I've tried to make an automated way to [i]do that[/i] but all I came up with was this inefficient function:
It spawns an NPC somewhere around a specified area, if the NPC is stuck, it will be immediately removed and it will try again til it spawns.

[c👌de_g🎷]

Check if the position is valid BEFORE you spawn it then.

[Wolfo]

[QUOTE=code_gs;46218065]Check if the position is valid BEFORE you spawn it then.[/QUOTE]

How? :tinfoil:

What I do is checking if it is colliding but how can I do it without spawning it?