Bot line of site

#1 You might want to check out this resource

#2 Well I guess I meant more specifically if using ray cast is something you can do in script or in engine code

#3 I don't actually know if you can do that (though wouldn't be hard to implement, might want to check this), but the mentioned resource has a GetClosestHumanInSightandRange method which might give some inspiration.

#4 There is a server-side script function for doing raycasts: containerRayCast().
here's a simple script wrapper around it to check if a point is in line-of-sight, using the typeMasks to indicate what sort of things block the line-of-sight. you may want different types. "exempt" means a single object which you don't want to include in the collision test; typically this is set to the originating player. eg, if you're testing for playerA being able to see some spot and it's possible for players to block the line-of-sight, you probably want to exempt playerA.

if you want it to do line-of-sight tests client-side as well, you have to modify the engine but it's very easy.

function Math::isInLineOfSight(%src, %trg, %exempt, %checkForPlayers)
{
   %mask = 0                            |
      $TypeMasks::TerrainObjectType     | 
      $TypeMasks::InteriorObjectType    | 
      $TypeMasks::StaticShapeObjectType | 
      $TypeMasks::ItemObjectType        | 
      $TypeMasks::VehicleObjectType     |
      $TypeMasks::WaterObjectType       |
      0;
   
   if (%checkForPlayers)
      %mask |= $TypeMasks::PlayerObjectType;

   return !containerRayCast(%src, %trg, %mask, %exempt);
}

edit: removed a 4th, custom parameter to containerRayCast.

#5 Ok so I tried this:

function AIPlayer::scanArea(%this)
{   
    //Determine how far should the picking ray extend into the world?  
    %selectRange = 3;   
    // Only search for veichles 
    %searchMasks = ($TypeMasks::playerObjectType);  
    echo(%searchmasks);
    %pos = %this.getEyePoint();   
    // Start with the shape's eye vector...   
    %eye = %this.getEyeVector();   
    %eye = vectorNormalize(%eye);   
    %vec = vectorScale(%eye, %selectRange);   
    %end = vectorAdd(%vec, %pos);   
    %scanTarg = ContainerRayCast (%pos, %end, %searchMasks);   
    // a target in range was found so select it   
       if (%scanTarg)   
           {      
		    
 		echo("Found bob");     
		 %this.schedule(100,"scanArea");
           }
      else
      {
      echo("dont see bob");
      %this.schedule(100,"scanArea");
      }

which is basically straight from:
http://www.garagegames.com/index.php?sec=mg&mod=resource&page=view&qid=3925


I just made it an AI function, problem is the bot always sees the player in the level, no matter where the player is, I'm not sure why he can always see the player or if it's even "searching" correctly

#6 Hmm. not sure, but try using the %exempt parameter i mentioned above.

%scanTarg = ContainerRayCast (%pos, %end, %searchMasks, %this);

#7 Oh I get you

Thanks it wasn't clicking at first