UnrealScript Game Programming Cookbook

Chapter 8

243

1. This occurs in our PostRender() function within our TutorialHUD class.
   Let's add the variables we'll need right now.
   local Actor HitActor;
   local Vector HitLocation, HitNormal, EyeLocation;
   local Rotator EyeRotation;


2. A check is necessary to verify that we have a player controller, and whether we
   grab the camera location and rotation or not. This will be used for our trace.
   /*Check for pawn owner/
   if (PlayerOwner != None)
   {
   /* Grab player camera loc & rot /
   PlayerOwner.GetPlayerViewPoint(EyeLocation, EyeRotation);


3. The pawn's EyeLocation is where we start the trace and extend from. We check
   to see if each actor is actually a pawn, and anything else is discarded, including
   our own pawn.
   / Trace to see where player is looking. Used to ignore
   specific objects /
   ForEach TraceActors(class'Actor', HitActor, HitLocation,
   HitNormal, EyeLocation + Vector(EyeRotation) *
   PlayerOwner.InteractDistance, EyeLocation,
   Vect(1.f, 1.f, 1.f),, TRACEFLAG_Bullet)
   {
   / If the hit actor is the player owner, player
   owner's pawn or if hit actor isn't visible, ignore
   it */
   if (HitActor == PlayerOwner ||
   HitActor == PlayerOwner.Pawn ||
   !FastTrace(HitActor.Location, EyeLocation))
   {
   continue;
   }
   /* Checks if the actor is a pawn /
   if (HitActor.IsA('Pawn'))
   {
   / Draws the 2D brackets */
   RenderBoundingBox(HitActor);
   }

If a pawn is within our trace, we then call our RenderBoundingBox() function

to draw a box around the pawn.