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ISceneNode Inheritance
Posted: Sun Dec 14, 2008 4:01 am
by 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.
Code: Select all
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:
Code: Select all
Tile* n = smgr->addCubeSceneNode();
I get the error:
error: invalid conversion from `irr::scene::ISceneNode*' to `
Tile*'
What am I doing wrong?
Re: ISceneNode Inheritance
Posted: Sun Dec 14, 2008 5:03 am
by Acki
knicholes wrote: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 !!!
knicholes wrote: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...." ???
Posted: Sun Dec 14, 2008 9:28 pm
by vitek
knicholes wrote:Code: Select all
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...
Code: Select all
Tile* tile = new TileSceneNode(parent, smgr);
Travis
Posted: Sun Dec 14, 2008 11:10 pm
by 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.
Posted: Sun Dec 14, 2008 11:59 pm
by rogerborg
Uh, no. Based on what you've shown us, you've created a CCubeSceneNode, not a Tile. Casting it won't change that.
Posted: Mon Dec 15, 2008 1:07 am
by Ion Dune
Try encapsulating:
Code: Select all
class Tile
{
public:
Tile(ISceneNode*Node)
: node(Node), x(0), y(0)
{}
private:
ISceneNode * node;
int x;
int y;
};
Code: Select all
Tile * n = new Tile( smgr->addCubeSceneNode() );