Post Tutorial 8 - advice needed!

[solthar]

Well, I've completed all the current XNA tutorials ( up to the 8th), and now I have a rather burning question...

How the heck do I go about modifying an object once it has been added to the objectmanager?

For instance, let's say that I want an object to move left on keypress - the InputManager part of things makes perfect sense to me, but the ObjectManager seems to be a riddle inside a mystery wrapped in an enigma...  No matter how I look at it, I can't seem to identify the proper way of access an object from it.

Looking at all the example code, also, I notice that they never do anything with the objects themselves - just the camera.

So, any advice on this front? Am I missing something stupidly simple (again)?

Thanks in advance!

[Nemo Krad]

It's been a while since I looked at the tutorials, but in my version of the manager I am sure I added the ability to give each object a name in the list so I could pull them out by name, that way I can get the exact model I want any time and do what I need with it.

I really need to get some time to get back into this engine, Mike, sorry I have not been around, life kind of overtakes you some times.

I'll have to get onto the SVN at some point and get some stuff up there...

solthar, let me know if you need more detail and I will get some sample code up here to show what I mean.

[solthar]

I think I know what you're talking about, but yeah - I wouldn't mind a touch more detail  .

thanks!

[mikeschuld]

I will probably be adding the dictionary functionality into the XNA 3.0 version of the tutorials as well. There are a few other things (broken ones ) that I found in some places that are being fixed or replaced in those versions as well. Hopefully I will have them all done and updated by the public release!

[Nemo Krad]

solthar,

I added a name property to the ObjectNode

Code:

        private string myName;
        public string Name
        {
            get { return myName; }
        }

Then in the RCSceneGraph I have

Code:

public RCObjectNode GetObject(string Name) [...]
public void RemoveObject(string name) [...]
public void SetObject(string name, RCObject newObject) [...]

So when adding an object I call SetObject

Code:

        public void SetObject(string name, RCObject newObject)
        {
            for (int on = 0; on < myRoot.Nodes.Count; on++)
            {
                if (((RCObjectNode)myRoot.Nodes[on]).Name == name)
                    myRoot.Nodes[on] = new RCObjectNode(newObject,name);
            }
        }

When retreiving an object

Code:

        public RCObjectNode GetObject(string Name)
        {           
            for(int on=0;on<myRoot.Nodes.Count;on++)
            {
                if (((RCObjectNode)myRoot.Nodes[on]).Name == Name)
                    return (RCObjectNode)myRoot.Nodes[on];
            }
            return null;
        }

[solthar]

I guess I should add a request for a scenegraph tutorial in the XNA request section .    As what i've got has no scenegraph - and to be quite honest, I'm rather lacking in regards as to how I should go about implimenting one.

Heh, ah well - I guess I'm ad libing this one.