How to detect if an object is nearby to perform an action

I am creating a demo walkthrough of an environment and I need the player to look at certain points of interest along the journey.

I plan on using the transform.lookat to allow the player to look at the points of interest but I do not know how to code the part where the program will detect if a suitable point of interest is nearby or not.

 

you can make somethink with Vector3.Distance
or use trigger areas around your points of interest where your target is set than to your point of interest

 

You could give the points of interest a large collider box and set it to is trigger then if you enter collider it triggers ontriggerenter which makes your character do a lookat then make lookat null ontriggerexit. Other one is vector3.distance. You can do a search on basic enemy ai and find examples set up for this. Basically creating a script on player with transform variables and drag and drop points of interest onto it and call Vector3.Distance so when its less then value you lookat and when its not its null and reset view.

 

You can put Collider into the Scenes. There are actions do detect if a Objekt is inside oder enter a collider.

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