UnrealScript Game Programming Cookbook

Chapter 6

155

6. If our weapon is destroyed or we are destroyed, then we want to prevent the
   weapon from continuing to lock onto a target.
   /****
   
   
   • If the weapon is destroyed, cancel any target lock
     ****/
     simulated event Destroyed()
     {
   
   
   
   

// Used to adjust the LockTarget.

AdjustLockTarget(none);

//Calls the previously defined Destroyed function

super.Destroyed();

}

7. Our next chunk of code is pretty large, but don't let it intimidate you. Take your time
   and read it through to have a thorough understanding of what is occurring. When it
   all boils down, the CheckTargetLock() function verifies that we've actually locked
   onto our target.
   We start by checking that we have a pawn, a player controller, and that we are
   using a weapon which can lock onto a target. We then check if we can lock onto
   the target, and if it is possible, we do it. At the moment we only have the ability
   to lock onto pawns.
   /*****
   
   
   • Have we locked onto our target?
     ****/
     function CheckTargetLock()
     {
     local Actor BestTarget, HitActor, TA;
     local UDKBot BotController;
     local vector StartTrace, EndTrace, Aim, HitLocation,
     HitNormal;
     local rotator AimRot;
     local float BestAim, BestDist;
   
   
   
   

if((Instigator == None)||(Instigator.Controller ==

None)||(self != Instigator.Weapon) )

{

return;

}