Find a way for AI position on Server

Amnedge1331 · 03-13-2015 10:07 PM

Hello,
I'm actualy seeking in a way to put the position of my Ais nearly or exactly like all Clients see.

I did this, which activate on all Clients the actionMoveTo() of the Player : Game.Chr when a target is find by an Ai on the server:

Code:

// Go to the active target crash if no active target

   void ArtificialIntelligence::goToTarget()

   {

      MovementTimer = 0.5;

            File f;

            f.writeMem().putByte(CS_AI_MOVE);

            f.cmpIntV(Creature_ID ).

            cmpFlt3cm(active_client_target.pos().x).

            cmpFlt3cm(active_client_target.pos().z);

            REPA(active_clients){f.pos(0); active_clients[i]->connection.send(f,f.left(),true);} //Send movement to all active clients.*/

   }

In this way the Ai of all client move correctly to the target position, but can't attack because I don't have on server the real position.

So i tried this:

Code:

// Go to the active target crash if no active target

void ArtificialIntelligence::goToTarget()

   {

      MovementTimer = 0.5;

      if(Position.x>active_client_target.pos().x)

            {

               Position.x-=1;

            }

            else

            {

               Position.x+=1;

            }

            if(Position.z>active_client_target.pos().z)

            {

               Position.z-=1;

               Position.y = active_client_target.pos().y;

            }else

            {

               Position.z+=1;

               Position.y = active_client_target.pos().y;

            }

            File f;

            f.writeMem().putByte(CS_AI_MOVE);

            f.cmpIntV(Creature_ID ).

            cmpFlt3cm(active_client_target.pos().x).

            cmpFlt3cm(active_client_target.pos().z);

            REPA(active_clients){f.pos(0); active_clients[i]->connection.send(f,f.left(),true);} //Send movement to all active clients.*/

   }

Now the server "have" the position of the Ai, but it's realy bad because i just estimate where the Ai can be, I need to know if there is a wall, if it's reachable (with Game.World.path().find() methods by example I imagine with allow_partial_paths on false), if i see the target eyes in eyes..

So i tried to extend Chr to Ai for the methods actionMoveTo() in hope to start it on Server and Clients like to be synchronized but nothing happen i tried this way:

Code:

// Go to the active target crash if no active target

   void ArtificialIntelligence::goToTarget()

   {

      MovementTimer = 0.5;

//I need reachable condition here like: if(!isReachable(start, destination))return;

      super.actionMoveTo(active_client_target.pos()); //Don't work

      File f;

      f.writeMem().putByte(CS_AI_MOVE);

      f.cmpIntV(Creature_ID ).

      cmpFlt3cm(pos().x).

      cmpFlt3cm(pos().z);

      REPA(active_clients){f.pos(0); active_clients[i]->connection.send(f,f.left(),true);}  //Send movement to all active clients.*/

   }

So if there is an other way to do it, please let me know that ! smile

Thank to all!
(I'm french sorry for my approximately english)

TBJokers · 03-14-2015 04:49 PM

Server sided pathfinding is the first thing you'd need. Sending a destination position to a client and letting the client run ActionMoveTo will make the client generate the path. So implementing Server sided pathfinding would be the thing to do, this way the server would have each waypoint until destination and you would only need to calculate a linear interpolation between the waypoints and updating the current position.

kevindekever · 03-14-2015 08:06 PM

have a look at common creature structure
https://github.com/TrinityCore/TrinityCo...Creature.h
https://github.com/TrinityCore/TrinityCo...eature.cpp

followed by the structure for ai
https://github.com/TrinityCore/TrinityCo...eatureAI.h
https://github.com/TrinityCore/TrinityCo...tureAI.cpp

the ai uses movementscripts
https://github.com/TrinityCore/TrinityCo...e/Movement

TrinityCore is a free open-source server for wow and a good example how to manage all components of ai scripts loots etc

perhaps some diagrams are better to understand
http://www.trinitycore.net/db/dd5/classCreature.html
http://www.trinitycore.net/d5/d79/classCreatureAI.html
http://www.trinitycore.net/d3/d7d/classM...rator.html

Amnedge1331 · 03-15-2015 03:55 PM

Edit:

Code:

if(Ais.elms())

         {

            FREPAD(i, Ais)

            {               

               ai.New().createAI(iAi++,Ais[i].obj.findParam("Name").asText(), Vec(Ais[i].pos().x, Ais[i].pos().y+112, Ais[i].pos().z), Ais[i].obj.findParam("radiusMove").asFlt(), Ais[i].obj, Ais[i].obj.findParam("agressive").asBool(), Ais[i].obj.findParam("radiusRange").asInt(), Ais[i].obj.findParam("health").asFlt(), Ais[i].obj.findParam("mana").asFlt()); //ID(326913368, 1079849300, 1809609151, 1190028286)

               Memc<Vec> pa;

               if(Game.World.path().find(Vec(0, -112, 0), Vec(2, -112, 2), pa)){

                  Gui.msgBox(S, S+"ok");

               }else

               {

                  Gui.msgBox(S, S+"not ok");

               }

            }

         }

It's work when i put Vec(0, -112, 0), Vec(2, -112, 2), because at my y=0 between editorworld and world in code there is a difference of nearly 112.. but it's just work in my World.cpp so i can imagine that my PathWorld is delete somewhere maybe

Thank for reply!

so with your advices, i search now how can i get the pathworld on server, I look how the tutorial 08 - Pathfinding process, and they did this:

Code:

Game.ObjMap<Game.Chr> Chrs;

Game.World.activeRange(D.viewRange())

             .setObjType (Chrs, OBJ_CHR)

             .New        (UID(3199326727, 1331546700, 2335466931, 1420158981)) // load "path" world

             .update     (Cam.at);

My World.cpp on server is like:

Code:

Net.World &world = *Net.Worlds(world_id);

   Game.ObjMap<CustomStatic>  Decors;

   Game.ObjMap<CustomStatic>  iTrees;

   Game.ObjMap<CustomStatic>  movingtrees;

   Game.ObjMap<CustomStatic>  Ais;

  //Game.ObjMap<Item>           Items;

  // Memx<movingtree>          ObjInMotion;

  // Game.ObjMap<CustomItem>    Item;

   Game.World.mode(Game.WORLD_MANUAL);

   Game.World.setObjType(Decors, OBJ_STATIC)

             .setObjType(iTrees, OBJ_TREE)

             //.setObjType (Items  , AG_TERRAIN)

             //.setObjType(Item, OBJ_ITEM)

             .setObjType(movingtrees, OBJ_MOVINGTREES)

             .setObjType(Ais, OBJ_CHR)

             .New(EditorWorld);

My Ai are loaded like this:

Code:

if(Ais.elms())

         {

            FREPAD(i, Ais)

            {               

               ai.New().createAI(iAi++,Ais[i].obj.findParam("Name").asText(), Vec(Ais[i].pos().x, Ais[i].pos().y+112, Ais[i].pos().z), Ais[i].obj.findParam("radiusMove").asFlt(), Ais[i].obj, Ais[i].obj.findParam("agressive").asBool(), Ais[i].obj.findParam("radiusRange").asInt(), Ais[i].obj.findParam("health").asFlt(), Ais[i].obj.findParam("mana").asFlt()); //ID(326913368, 1079849300, 1809609151, 1190028286)

            }

         }

CustomStatic is:

Code:

class CustomStatic : Game :: Static

{

   Game.ObjParams obj;

   //PhysBodyPtr   phys; // fixme

   void create(Game.ObjParams &obj)

   {

      super.create(obj);

      T.obj = obj;

   }

   C UID get_ID()

   {

      if (&obj)

         return obj.base().id();

      return UIDZero;

   }

   ~CustomStatic()

   {

      obj.del();

   }

   CustomStatic(){};

}

Now on Main server something like this:

Code:

Memc<Vec> pa;

Game.World.path().find(Vec(0, 0, 0), Vec(2, 2, 2), pa)

is always false instead of calculate the good path so there is an issue for this ? I'm actualy seeking why it's always false.

RedcrowProd · 03-17-2015 04:55 AM

up

Amnedge1331 · 03-17-2015 01:24 PM

Hello community !

So after my search i found that my Areas are unload each time I did this:

Code:

Game.World.areaSetState(areastates, true);

Cause when i put it true it deletes my previous Area, the Game.World.path().find in my World work because i research into Area(0,0) and it's called when my Ai is created in Area(0,0) too but if i put my Ai in other Area the find which search in Area(0,0) wont work.

So now when i put:

Code:

Game.World.areaSetState(areastates, false);

i got this screen error when server start:
[Image: 140859screenerror.jpg]

After debugging with Visual i got this:
[Image: 162831screenerror2.jpg]

So i look what my _elms client contain and it's crazy if it's real:
[Image: 697857screenerror3.jpg]

Any suggestions of test or something ? thank all !

Ok sorry my bad, i'm actualy explose my head on my wall but it's ok smile

Here was my error..

Code:

Memp<Vec> l; //this Memp..

      find = Game.World.path().find(Vec(0, -112, 0), Vec(1, -112, 1), l, -1, PMF_WALK, true);

it was in draw of main when i start to test find(), so now i can did my Ai hope someone will find something interesting here ! pfft

Find a way for AI position on Server
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