Stealth ELements, how?

[Yamato57]

Hello everyone, I'm new to modding games. I have a question, im trying to make a stealth fps game and i cannot find any source code or examples on how to create NPC enemy stealth detection. I want to make it simple like MGS where they patrol back and forth; if they see you in their detection range, they will attack you. Can someone give me tips on how to do that?

THanks alot!

[Smurftyours]

I'm pretty sure NPCS already have detection coded to them. All you should need to do is make them patrol and crouching players will be able to sneak up onto them from behind.

[Yamato57]

oh sweet, that's awesome. I'm assuming i can either make a script for them or make a patrol sequence in the Hammer editing tool.

thanks for the speedy reply!!

[stoopdapoop]

yeah, all npc's have a coded eye position, field of view, and view distance, you can view them with certain console commands, but I forgot what they were (I'll look them up when I wake up, if you want)

also, any time your character makes a noise, including footsteps, npc's can hear it, depending on the volume of the sound, and how close the npc is. There is also a console command to show the audible range of all sounds made. It's kinda cool actually.

[Gradius]

Well you'd need to change their behaviour or they'll spot you far to easily. The game was never designed to be stealth so unless they're looking directly away from you and are not in an alert state they won't find you... but should they so much as glimpse you out of the corner of their eye for a milisecond it's on.

[stoopdapoop]

that is true.

yamato, if you have coding experience it probably wouldn't be too difficult to make detection time dependent on distance and the player's light level.

also, it's an easy fix, but npc's don't investigate sounds that they can hear but cannot see, they just turn to face the sound, this can easily be fixed in the code as well.

[Ark11]

Perhaps you could make it that when the player is in the 'stealth' position (maybe crouching?) that you fire a console command of 'notarget 1' which makes npc's ignore the player and when the player is no longer in the 'stealth' position you fire a console command of 'notarget 0'