ISceneNode Inheritance

[knicholes]

I wrote a working text-based version of an 8 puzzle, but I want to add graphics using irrlicht. I don't want to have to re-write everything, so I want to just inherit my Tile (the pieces you move around) class from the ISceneNode class. I have this as my simple and initial attempt to inherit.

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class Tile : public ISceneNode
{
public:
	Tile();
	Tile(ISceneNode*,ISceneManager*,s32,const core::vector3df &,const core::vector3df &,
		const core::vector3df &);
	
	
private:
	int x;
	int y;
};

Tile::Tile(ISceneNode* parent,ISceneManager* mgr,s32 id = -1,
const core::vector3df & 	position = core::vector3df(0,0,0),
const core::vector3df & 	rotation = core::vector3df(0,0,0),
const core::vector3df & 	scale = core::vector3df(1.0f, 1.0f, 1.0f))
	:ISceneNode(parent, mgr, id, position, rotation, scale),x(0),y(0){};

Later on I try to declare this new class I've created with the following code:

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Tile* n = smgr->addCubeSceneNode();

I get the error:
error: invalid conversion from `irr::scene::ISceneNode*' to `
Tile*'

What am I doing wrong?

[Acki]

Tile::Tile(ISceneNode* parent,ISceneManager* mgr,s32 id = -1,
const core::vector3df & position = core::vector3df(0,0,0),
const core::vector3df & rotation = core::vector3df(0,0,0),
const core::vector3df & scale = core::vector3df(1.0f, 1.0f, 1.0f))
:ISceneNode(parent, mgr, id, position, rotation, scale),x(0),y(0){};

this looks bad, I wonder you don't get an error message about it...
in the implementation of a function (here the constructor) you must not set default values, you do this with the declaration !!!

I get the error:
error: invalid conversion from `irr::scene::ISceneNode*' to `
Tile*'

are there any further errors, usually after this comes a line "because...." ???

[vitek]

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Tile* n = smgr->addCubeSceneNode(); 

The problem is that ISceneManager::addCubeSceneNode() doesn't return a Tile*, it returns an ISceneNode*. If you want a Tile, you need to create one...

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Tile* tile = new TileSceneNode(parent, smgr);

Travis

[knicholes]

Cool, thanks for the help guys! I realized it's because I needed to just do a static_cast<Tile*> to the smgr pointer.

[rogerborg]

Uh, no. Based on what you've shown us, you've created a CCubeSceneNode, not a Tile. Casting it won't change that.

[Ion Dune]

Try encapsulating:

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class Tile
{
public:
   Tile(ISceneNode*Node)
      : node(Node), x(0), y(0)
   {}
   
private:
   ISceneNode * node;
   int x;
   int y;
}; 

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Tile * n = new Tile( smgr->addCubeSceneNode() );