Scene Reloaded

#1 Hmm...

I've tried loading a level too, but every method I try, I get:

A first chance exception of type 'System.ObjectDisposedException' occurred in Microsoft.Xna.Framework.dll
Cannot access a disposed object.
Object name: 'Texture2D'.

I guess I need to keep the textures and stuff.

#2 The problem is that SceneLoader.Unload() obliterates EVERYTHING in the folder specified by the scene file and that includes materials, scenegraph, camera, all of it. So, I think we need to split up the .txscene file and just unload the parts we dont want. So.... create somthing like like

core_game_assets.txscene (create it by starting with the default level_01.txscene and deleting everything)
level1.txscene (the current level_01.txscene)
level2.txscene (the new changed level_01.txscene file for level 2)

In the Game.cs, BeginRun() method, load the core_game_assets.txscene and the level1.txscene. Then, in your level change code, only unload your level1.txscene and load the level2.txscene. I haven't had a chance to try this yet, but I think the theory is sound. Maybe someone can give it a shot and report back.

John K.

#3 I've had a go at that and got this:

---- DEBUG ASSERTION FAILED ----
---- Assert Short Message ----
Mounter and mountee must either both be registered or neither registered.
---- Assert Long Message ----


    at Assert.Fatal(Boolean condition, String message)  
    at T2DSceneObject.Mount(T2DSceneObject mountee, String linkPointName, Vector2 offset, Single rotationOffset, Boolean ownedByMount)  
    at PlayerDragonActorComponent._mountCamera()  C:PlayerDragonActorComponent.cs(142)
    at PlayerDragonActorComponent._PostRegister()  C:Actors\Player\PlayerDragonActorComponent.cs(191)
    at TorqueComponentContainer._PostRegisterComponents()  
    at TorqueObject.OnRegister()  
    at T2DSceneObject.OnRegister()  
    at TorqueObjectDatabase.Register(TorqueObject obj)  
    at TorqueSceneData._LoadObjects(List'1 list)  
    at TorqueSceneData.Load(String filename, List'1 extraAssemblies)  
    at TorqueSceneData.Load(String filename)  
    at SceneLoader.Load(String sceneFileName)  
    at Game.myUnLoader()  C:Game.cs(216)
    at PepperCollectibleComponent._confirmPickup(T2DSceneObject ourObject, T2DSceneObject theirObject, ActorComponent actor)  C:PepperCollectibleComponent.cs(30)
    at CollectibleComponent._onEnter(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info)  C:CollectibleComponent.cs(36)
    at DirectionalTriggerComponent.OnCollision(T2DSceneObject ourObject, T2DSceneObject theirObject, T2DCollisionInfo info, T2DResolveCollisionDelegate& resolve, T2DCollisionMaterial& physicsMaterial)  C:\PlatformerFramework\DirectionalTriggerComponent.cs(49)
    at T2DPhysicsComponent._ResolveCollisions(List'1 list)  
    at T2DPhysicsComponent.ProcessTick(Move move, Single dt)  
    at ProcessList._TickObjects(Single tickSec)  
    at ProcessList.AdvanceTick(Single floatMS)  
    at TorqueEngineComponent._UpdateSim(String eventName, Single elapsed)  
    at TorqueEvent'1._Trigger(Delegate d)  
    at TorqueEventManager._TriggerEvent(TorqueEventBase ev)  
    at TorqueEventManager.MgrProcessEvents()  
    at TorqueEventManager.ProcessEvents()  
    at TorqueEngineComponent.Update(GameTime gameTime)  
    at Game.Update(GameTime gameTime)

What i done was:

Create a new method in Game class;

public void myUnLoader()
        {
            SceneLoader.UnloadLastScene();
            SceneLoader.Load(@"data\levels\level_01.txscene");
        }

Added a line too begin run:

//load the content
            SceneLoader.Load(@"data\levels\Content_Loader.txscene");
            // load the test level
            SceneLoader.Load(@"data\levels\level_01.txscene");

Also to trigger all this, in the peppercomponent:

protected override bool _confirmPickup...
  if (actor is PlayerDragonActorComponent...
    Game.Instance.myUnLoader();

It basically starts to load the second level and has problems with the camera here:

PlayerDragonActorComponent
camera.Mount(_actor, String.Empty, new Vector2(0, -1), 0.0f, true);

#4 John,

Seems like a clever idea because I remember that I once was able to load a new scene OVER the last one without errors. I am still a bit busy with my Dream-Build-Play entry but if I win and get a contract for XBox Live (ha-ha-ha...) I will have to implement different scenes in my game and I will try this approach.

#5 I'm not laughing - I think you have a really great shot at winning it! When you're making the big Xbox LIVE money, remember us little people ;)

John K.

#6 John,

You are very kind :-)
To thank you, I (accidentally...) ordered two copies of your book:
One through amazon and one from Garage Games... ;-)

All the best!

#7 Amazon has a great return policy with instructions on their site. I've accidentally double-ordered items too ;)

John K.

#8 Did anyone ever figure this out.. I still cant seem to find a solid answer to how to change levels with the platformer x kit..

#9 I am still waiting for a solution to this as well.

I am starting to think the platformer kit is not fit for purpose and should be withdrawn from sale