How do I get the target position after a turn?

Hi everyone,

perfect noob here... in English language too (sorry!).

My, very basic, question is: in a top-down game I have an AI Car (with "Car" behaviour, guided by events) pursuing other vehicles in a large arena (Car Wars style ). The Car may easily figure out if a target is in front of it by "LOS" behaviour; when the target exits the LOS cone (I keep it quite narrow), the Car knows it turned left or right. This is the point: left or right? how can the car to obtain this info? I tried the formula "angle(Car.x,target.x,Car.y,target.y)", supposing that when it returns 180 or less is a right turn and viceversa, but the returned values are useless (zero or -90) - probably I did not understand the correct use of that expression.

Any suggestion for a quick way to know where the target is relatively to the AI Car? thx in advance!

Massimo

1. it should be targetAngle = angle(car.x, car.y, target.x, target.y)

2. you should compare that angle to the angle of car, so if targetAngle < car.angle it turned right, else it turned left.

But also there is problem with angle 0 where 0 becomes 360, so it should be:

if targetAngle < car.angle = right

or

if targetAngle > car.angle + 180 = right

else = left

Hope it helps, if you give capx maybe I could help more.

Ehm...it appears I miss completely the syntax of the expression

Now it works perfectly.

Thank you so much for your help.

Massimo

My pleasure