comments from the c++ psemu build; field name changes

common/src/main/scala/net/psforever/packet/game/AvatarFirstTimeEventMessage.scala

@@ -5,9 +5,29 @@ import net.psforever.packet.{GamePacketOpcode, Marshallable, PacketHelpers, Plan
 import scodec.Codec
 import scodec.codecs._
 
+/**
+  * Dispatched to the server when the player encounters something for the very first time in their campaign.
+  * For example, the first time the player rubs up against a game object with a yellow exclamation point.
+  * For example, the first time the player draws a specific weapon.<br>
+  * <br>
+  * When the first time events (FTE's) are received, battle experience is awarded.
+  * Text information about the object will be displayed.
+  * A certain itemized checkbox under the "Training" tab that corresponds is marked off.
+  * The latter list indicates all "encounter-able" game objects for which a FTE exists.
+  * These effects only happen once per character/campaign.
+  * (The Motion Sensor will occasionally erroneously display the information window on repeat encounters.
+  * No additional experience is given, though.)<br>
+  * <br>
+  * FTE's are recorded in a great `List` of `String`s in the middle of player `ObjectCreateMessage` data.
+  * Tutorial complete events are enqueued nearby.
+  * @param avatar_guid the player
+  * @param object_id the game object that triggers the event
+  * @param unk na
+  * @param event_name the string name of the event
+  */
 final case class AvatarFirstTimeEventMessage(avatar_guid : PlanetSideGUID,
-                                             object_guid : PlanetSideGUID,
+                                             object_id : PlanetSideGUID,
-                                             unk1 : Long,
+                                             unk : Long,
                                              event_name : String)
   extends PlanetSideGamePacket {
   type Packet = AvatarFirstTimeEventMessage
@@ -18,8 +38,8 @@ final case class AvatarFirstTimeEventMessage(avatar_guid : PlanetSideGUID,
 object AvatarFirstTimeEventMessage extends Marshallable[AvatarFirstTimeEventMessage] {
   implicit val codec : Codec[AvatarFirstTimeEventMessage] = (
      ("avatar_guid" | PlanetSideGUID.codec) ::
-     ("object_guid" | PlanetSideGUID.codec) ::
+     ("object_id" | PlanetSideGUID.codec) ::
-     ("unk1" | uint32L ) ::
+     ("unk" | uint32L ) ::
      ("event_name" | PacketHelpers.encodedString)
     ).as[AvatarFirstTimeEventMessage]
 }