How do I make steslth physics?

How do I...?
1

How do I make 3d enemy stealth ai? Because I can use raycasts but its harder to do a cone of them. Is there an extension or template for it?

2

could you use a 2d triangular object and point inside as its vision cone? …maybe with less than and greater than for a z check and then if true do a raycast to check whether somethings hidden by an obstacle

3

well, the problem is that if I do that, they will be able to spot you through walls. Which I guess isn’t that bad but still kinda annoying. Do you think using a raycast to detect if theres a wall first and then detecting with the 2d cone would work?

4

I was thinking do the raycast last with a NOT —and have all the obstacles in a group. So you do point inside first and then check if theres obstacles in the way…but not every frame

5

Screenshot 2026-03-29 140859
Screenshot 2026-03-29 1408591304×363 29.5 KB

this sort of thing …i just did it as an auto fire for the player. But I thought having the raycast as a final thing just to check there’s a clear shot would be better than firing off loads of raycasts all the time. the origin and center of the cone are in the corner.

6

Okay, thx for the help

7

um…i personally wouldve just used a cone object lmao

8

or a conical rectangle? - I thought an xy check on a triangle would be efficient and there’s not normally a lot of terrain in games. I think (i might be wrong as i don’t do a lot of 3d) that the collision area for a cone shape is still a box. In the game that i tested it in there’s no up down at all and so i didn’t do a z check, but i was thinking of just doing z>objectZ()-200 and less than objectZ()+200. It would be good to test out various systems and see which are most efficient and effective

9

hi, for almost every game i make i use raycasts, (big stealth game fan) and one handy-dandy thing i found out, is that for top down games, if you put Enemy.angle() +/- one of the angles you wanna use for the cone, it just works. So if you want a 45 degree cone, we can do that by starting with
Enemy.angle() + 45
Enemy.angle() - 45 (since we als need the opposite angle for the cone)
Enemy.angle() + 40
Enemy.angle() - 40
Enemy.angle() + 35
Enemy.angle() - 35

and so on, keep substracting 5 until you reach zero and you will have a great cone for your stealth game.

10

oh thx. how did i not think of that lol