Only call a function when 2 condictions are fulfilled

[MulleDK19]

Add a collide callback for the area, and a look callback for the entity.

When the player enters the area, set a variable to true. When he leaves, set the same variable to false.
When the player looks at the entity, set another variable to true. When he stops looking, set the same variable to false.

In both functions, call a third function like: void DoStuffIfPlayerIsInAreaAndLookingAtEntity()
where you check the 2 variables.