Student seeking inspiration!

// find end of search vector
    %ray = VectorScale(%ray, 2000); // change 2000 to the world unit length you want
    %end = VectorAdd(%start, %ray);

    // set up to look for the terrain
    %searchMasks = $TypeMasks::TerrainObjectType;  // alter this to include object type masks that you need.

    // search!
    %scanTarg = ContainerRayCast( %start, %end, %searchMasks);

DefineEngineFunction( containerRayCast, const char*,
   ( Point3F start, Point3F end, U32 mask, SceneObject *pExempt, bool useClientContainer ), ( NULL, false ),
   "@brief Cast a ray from start to end, checking for collision against items matching mask.nn"

   "If pExempt is specified, then it is temporarily excluded from collision checks (For "
   "instance, you might want to exclude the player if said player was firing a weapon.)n"

   "@param start An XYZ vector containing the tail position of the ray.n"
   "@param end An XYZ vector containing the head position of the rayn"
   "@param mask A bitmask corresponding to the type of objects to check forn"
   "@param pExempt An optional ID for a single object that ignored for this raycastn"
   "@param useClientContainer Optionally indicates the search should be within the "
   "client container.n"

   "@returns A string containing either null, if nothing was struck, or these fields:n"
   "<ul><li>The ID of the object that was struck.</li>"
   "<li>The x, y, z position that it was struck.</li>"
   "<li>The x, y, z of the normal of the face that was struck.</li>"
   "<li>The distance between the start point and the position we hit.</li></ul>" 

   "@ingroup Game")

// in trigger onTriggerEnter() callback script:
// need to set %ghostObject to an id stored on the trigger object
%trigger.ghostObject.visible = true;
schedule(500, 0, "hideGhost", %trigger.ghostObject);// time, objID, function name, parameters

// 
function hideGhost(%ghost)
{
  %ghost.visible = false;
}

function highlightObjects(){
	
	new SimGroup(Highlight);
	foreach$(%group in "Objects Clues"){
		foreach(%elem in %group){
			//echo(%elem.getId() SPC %elem.getClassName() SPC %elem.getPosition());
			
			%pos = %elem.getPosition();
				
			%emitter = new ParticleEmitterNode() {
				emitter = PlayerFoamDropletsEmitter;
				position = %pos;
				dataBlock = DefaultEmitterNodeData;
			};
			Highlight.add(%emitter);
			
		}
	}
}

function unHighlightObjects(){
	Highlight.delete();
}

Quote:
is there an easier way than command to server?

// defined:
function serverCmdhighlightObjects(){  
      
    new SimGroup(Highlight);  
    foreach$(%group in "Objects Clues"){
        foreach(%elem in %group){  
            //echo(%elem.getId() SPC %elem.getClassName() SPC %elem.getPosition());  
              
            %pos = %elem.getPosition();  
                  
            %emitter = new ParticleEmitterNode() {  
                emitter = PlayerFoamDropletsEmitter;  
                position = %pos;  
                dataBlock = DefaultEmitterNodeData;  
            };  
            Highlight.add(%emitter);  
              
        }  
    }  
}  
  
function serverCmdunHighlightObjects(){  
    Highlight.delete();  
} 

// used:
commandToServer('highlightObjects');
// and 
commandToServer('unHighlightObjects');

foreach$(%group in "Objects Clues"){

foreach$(%group in "Objects_Clues"){