[Nero_3D]

You could also use angles for a approximation

Both objects are imaginary viewing each other, if X and Y are in both "viewing angles" of the objects the player is between them (the viewing angle is given by the parameter degrees * 2)

Resulting that the detection area looks like a rhombus obj1<>obj2

pawn Код:

stock IsBetweenXY(Float: X, Float: Y, Float: X1, Float: Y1, Float: X2, Float: Y2, Float: deg = 5.0) {
    return (
        (-deg <= (atan2(X2 - X1, Y2 - Y1) - atan2(X - X1, Y - Y1)) <= deg) && 
        (-deg <= (atan2(X1 - X2, Y1 - Y2) - atan2(X - X2, Y - Y2)) <= deg)
    );
}