How to load new scenenode?

[NewerCookie]

I wrote new scenenode and made irredit plugin (name..suppose "CSomeSceneNode")
Also, "CSomeSceneNodeFactory" was written for load .irr file.
And then, I need "CSomeSceneNodeFactory::addSceneNode()" like "CDefaultSceneNodeFactory::addSceneNode()"

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ISceneNode* CDefaultSceneNodeFactory::addSceneNode(ESCENE_NODE_TYPE type, ISceneNode* parent)
{
	switch(type)
	{
	case ESNT_CUBE:
		return Manager->addCubeSceneNode(10, parent);
	case ESNT_SPHERE:
		return Manager->addSphereSceneNode(5, 16, parent);
......
......

Here is problem.
I tried to "addSomeSceneNode()" but cant.
"add...SceneNode" function is ISceneManager's.
I'll make new scenemanager has "addSomeSceneNode()" derived from ISceneManager?
So then I control two different scenegraph? It's waste!

gimme some help, plz~

[vitek]

You need to implement all of the methods of ISceneNodeFactory. Once you've done that, you register your scene node factory with the scene manager like

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ISceneNodeFactory* myFactory = new CSomeSceneNodeFactory;
smgr->registerSceneNodeFactory(myFactory);
myFactory->drop();

This will allow the scene manager to create your node types when reading back from a .irr file. You can also create your node type by type name like this...

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ISceneNode* myNode = smgr->addSceneNode("myNodeType", parent);

If you want to create an instance of your scene node explicitly, you can do this...

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ISceneNode* myNode = new CSomeSceneNode(parent, smgr, ...);
myNode->drop();

If, at any point, you need to get a derived class pointer, you can do that like this...

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if (myNode->getType() == ESNT_SOMENODE) {
  CSomeSceneNode* someNode = (CSomeSceneNode*)myNode;
  // do stuff specific to derived class
}

If you've compiled the library and your code with RTTI enabled, you can use this also...

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CSomeSceneNode* someNode = dynamic_cast<CSomeSceneNode*>(myNode);
if (someNode) {
  // do stuff specific to derived class
}

Travis

[NewerCookie]

I get your point.
Don't use "add...SceneNode" function by perforce.
you're right.. I thought so complicated.
but, any other scenenodes are provided with "add...SceneNode" interface..
It's not smooth..
thanks, vitek

[vitek]

If you want to call smgr->addSomeSceneNode(...), you need to modify ISceneManager.h, CSceneManager.h and CSceneManager.cpp to create your derived scene node type. Once you do this, you need to rebuild your Irrlicht library. In the grand scheme of things, it's not really worth it.

Travis

[NewerCookie]

No, I don't want to modify engine.
It's make harder to use next version.
Thanks your advice, vitek