How to Make an Event Detect Player Proximity

[Fufi_Saintz]

Hi everyone, hope you all are well!

I just stepped into this thread because I am trying to make the same thing in my game, only with a difference: I want the player to be detectable only when a rotating/moving enemy is facing towards him/her (stealth part of the game, of course).
I already tried some solutions, and got some nice-but-not-exactly-what-I-wanted results, but they are complex solutions with a lot of switching/eventing, so I would be glad to hear your suggestions on how to achieve that result easily (or at least: "more easily", sure you all have got better solutions).

Heve a good day!

 

[caethyril]

I've split your post into its own thread, from here:

How to Make an Event Detect Player Proximity

What I want: To make an enemy that will patrol the map on their set route until the player gets within a few tiles, at which point they switch to approaching. What I have: Variables that match the current location of the event, and a variable for the detection radius. A branch that will flip a...

forums.rpgmakerweb.com

As you've mentioned, your request is different. You are always welcome to link to other threads that are relevant, like I've done here.

To check facing direction, you can use:

• Conditional Branch -> Character ___ is facing ___; or
• Control Variables -> Game Data -> Character -> Direction.

The latter returns a numpad direction: 2 = down, 4 = left, 6 = right, 8 = up.

This allows you to check both proximity (as discussed in the linked thread) and "field of view". E.g. if facing left, a 180-degree FoV check could be "is player X <= this character's X?". You can do other angles with some maths.

If you want to do line-of-sight checks, that's considerably more complicated. Without a plugin, you can use regions to help identify "sight areas", e.g. a room that is mostly region 1, but the area visible from the corridor is region 2; the corridor is all region 2. If you want movable LoS obstacles, though, then I'd definitely suggest a plugin.

 

[AquaEcho]

You can try Krons AI base

Kron's AI Base v. a0.1 (upgraded)

Latest update (see end of thread): a short video demonstrating the visible view cone, that highlights map squares where a character could see another character. (No new downloads yet.) This is a tiny thing, but putting it here in case it's of interest. (This functionality may be provided by...

forums.rpgmakerweb.com

 

[Bex]

Here an Example to get started...

Var1 set to Event Direction (2,4,6,8)
Var2 set to Player MapX
Var2 - Event MapX
Var3 set to Player MapY
Var3 - Event MapY

If Var1 = 2 (Down)
If Var3 is equal or more 0
If Var3 is equal or less 6
If Var2 is equal or more -1
If Var2 is equal or less 1
in case all are true, than the Event has seen you.
Textbox: I can see you Down there. Wait 180Frames

If Var1 = 4
If Var3 is equal or more -1
If Var3 is equal or less 1
If Var2 is equal or more -6
If Var2 is equal or less 0
in case all are true, than the Event has seen you.
Textbox: I can see you on the Left. Wait 180Frames

If Var1 = 6
If Var3 is equal or more -1
If Var3 is equal or less 1
If Var2 is equal or more 0
If Var2 is equal or less 6
in case all are true, than the Event has seen you.
Textbox: I can see you on the Right. Wait 180Frames

If Var1 = 8
If Var3 is equal or more -6
If Var3 is equal or less 0
If Var2 is equal or more -1
If Var2 is equal or less 1
in case all are true, than the Event has seen you.
Textbox: I can see you Up there. Wait 180Frames

Edit:
This is just one example, depending on the kind of vision shape, there are different calculations.