[API Noob] How to calculate a relative angle in CPP/UE4

Development Programming & Scripting C++
6

I’m not clearly sure what you trying to achieve there but




toTarget = target.position - submarine.position;

relativeHeading = submarine.Heading.Dot(target.heading); // heading is normalized vector pointing in heading direction 

if(toTarget.Dot(submarine.heading) > 0 &&  (relativeHeading < -0.95)) // acos(0.95) = 18 degs
{
  target is ahead of submarine
}
else
{
  target is not ahead 
}