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Newbie question about scenegraphs

by Alex Prose · in Torque Game Builder · 07/09/2009 (6:47 pm) · 6 replies

I'm having a lot of problems figuring out how to add objects to the existing scene graph.

For instance, here's my problem:


I modify the game.cs files in the gamescripts folder to contain

---------
exec("./createDummy.cs");

createDummy();
--------

createDummy.cs contains the function:

-------
function createDummy.cs ()
{
$dummyObj::object = new t2dSceneObject() { scenegraph = %scenegraph; };
}
--------

Now this seems to add it to the scene, but whenever I try to access the object it gies me in-game debug error of:

"Object '1478' is not in a SceneGraph!"


If I create a new scenegraph within the function, it, of course, gives me a similar message saying:

"Object '1478' is in a different SceneGraph!"




I get this same problem for any objects I try to dynamically create. They don't show up because they aren't in a SceneGraph, or the scenegraph.

One solution I found was using "%this.getSceneGraph()", but thaty only worked in another script when I was calling "sceneWindow2D::onMouseDown()"

For reference, I'm using v1.7.4

Any suggestions? I think I jsut don't understand how the system works.
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Torque Owner Alex Prose

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Torque Owner Steve D
#1
07/09/2009 (8:40 pm)
This might be an easier way. When you are in the editor without anything selected you can go to the Edit tab and then the "Scene graph scripting" section and assign your scenegraph a name, such as SG.

When you create an object just use the command %object.AddToScene(SG) and that should work just fine.

In the code you typed above, you are using %scenegraph which is a local variable and has no value assigned to it.

Torque Owner Alex Prose
#2
07/09/2009 (9:13 pm)
I named the scenegraph "testgraph" and tried:

--------
function createDummy()
{


$dummyObj::object = new t2dSceneObject();


$dummyObj::object.addToScene(testgraph);

}
--------

I still have the same problem. Is there some special function or variable selector I'm supposed to use to access the scenegraph "testgraph"?

Associate Phillip O'Shea
Violent Tulip
#3
07/09/2009 (10:32 pm)
If you have a scenegraph named "testgraph" then you should just be able to specify the scenegraph for the object:
function createDummy()
{
    $dummyObj::object = new t2dSceneObject()
    {
        SceneGraph = testGraph;
    };
}
The alternative is to edit your startGame method to look like this:
function startGame(%level)
{
   Canvas.setContent(mainScreenGui);
   Canvas.setCursor(DefaultCursor);
   
   new ActionMap(moveMap);   
   moveMap.push();
   
   $enableDirectInput = true;
   activateDirectInput();
   enableJoystick();
   
   sceneWindow2D.loadLevel(%level);
   
   // Set the Default Scenegraph.
   // Note: Any scene object created without a scenegraph specified will be
   //       automagically added to this scenegraph!
   t2dBeginScene( sceneWindow2D.getSceneGraph() );
}

Torque Owner Nikos Beck
#4
07/10/2009 (7:49 pm)
You can always do something like

<code>
$DummyObject = new t2dSceneObject() { SceneGraph = SceneWindow2D.GetSceneGraph() } ;
</code>

...so it'll figure out the scene graph for you.

Torque Owner Alex Prose
#5
07/10/2009 (10:51 pm)
The problem is that "SceneWindow2D.GetSceneGraph()" only works in functions that contain the window reference. For instance, it works fine in functions like "sceneWindow2D::onMouseDown()", but it doesn't work in normal functions.

Torque Owner Ehrlich
#6
07/10/2009 (11:07 pm)
actually, it does. i've been using regular functions (say, not attached to a specific class), and using functions that has to do with SceneWindow2D (like cameraShake, getSceneGraph, setCurrentCameraZoom), and they work flawlessly... i dont see why it shouldnt, if the sceneWindow2D is something really global!.