reducing ai npc's ability to see player while player not moving

how would you reduce an ai npc's ability to see the player while player not moving?

right now i have a system which has limits based on distance from player and vision angle and checks players head and feet. if either head or feet in range and FOV angle, and not blocked, then detected.

but i'm thinking if player stops moving, detection should be reduced some how.

a simple way would be to reduce distance and FOV angle but not sure that's totally realistic.

what do you all think?

thx

 

It doesn't have to actually be realistic; it just needs to seem realistic and/or consistent to the player. Basing visibility on the player's distance, FOV angle, and velocity sounds like a perfectly fine way to make something consistent that the player can comprehend and predict to a reasonable degree.

 

Read the state of the player,
if moving parameters = large values
else parameters = low values

 

Just make it a value and add or multiply it with darkness, distance, and angle.

I would make sound a separate system that includes distance, sound level, minus surrounding noise.

Also, make both a diminishing value so that the player can pause to blend back into hiding.

Also, also, make an event for “what’s that?”, to “something is fishy”, to “there they are!”, to “where’d they go?”, and “must have left”.

Oh, and have a value for alertness.

If they spot you, they should never go back to completely relaxed.

EDIT: oh, and for the love of god, include a shock value. Some AAA games neglect this. If they spot you there needs to be a hesitation for the player to make a decision. And if their buddy’s head gets blown off, it should make them react.

 

If you want realism, then I’d just tie it directly to distance. Fov is unrealistic because our eyes are much more sensitive to motion in the periferals. I assume you aren’t checking every frame right? You could also increase the number of frames between checks if the player is moving slower.

 

I think rather than every frame it works better to cycle through a list of enemies taking turns checking.

Because 1) saves on cpu and 2) the more distractions there are around you the less likely you are to notice something.