Prob with pure virtual func (i think)

Hey

Im restructuring a direct x program written in c++. Im calling a function called render which is a pure virtual function. The parent is GfxEntity and its child GfxEntitySprite has the implimentation of this function. When i call it in another class i get the error ''Render' : undeclared identifier'. Ive included them right i think so i dunno why i am having the problem. Here's some code.

in GfxEntity:

Code:

---

virtual void Render(const D3DXVECTOR3 *pos)=0;

---

in GfxEntitySprite:

Code:

---

void CGfxEntitySprite::Render(const D3DXVECTOR3 *pos)
{

...

}

---

and the call from Visualisation:

Code:

---

Render(&pos);

---

I have included the .h's for GfxEntity and GfxEntitySprite in Visualisation.h so i dunno why it cant see it. Any ideas?

You're really going to have to post some more code.

erm ok. i dunno whats gonna help tho.

The render function:

Code:

---

void CGfxEntitySprite::Render(const D3DXVECTOR3 *pos)
{
D3DXVECTOR2 pos2d=*pos;

m_sprite->Begin();
m_sprite->Draw(m_texture, NULL, NULL, NULL, 3.14f, &pos2d, 0xFFFFFFFF);
m_sprite->End();
}

---

Call from vis:

Code:

---

void CVisualisation::RenderEntity(int id, const D3DXVECTOR3 *pos)
{
gD3dDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255, 255, 255), 0, 0);
gD3dDevice->BeginScene();

Render(&pos);

gD3dDevice->EndScene();
gD3dDevice->Present(NULL, NULL, NULL, NULL);       
}

---

.h declaration of class CGfxEntitySprite

Code:

---

class CGfxEntitySprite : public CGfxEntity 
{
public:
        CGfxEntitySprite() {};
        virtual ~CGfxEntitySprite() {};

        bool InitialiseSprite(const char* textureFilename);
        void Render(const D3DXVECTOR3 *pos);

private:
        LPD3DXSPRITE m_sprite;
        LPDIRECT3DTEXTURE9 m_texture;
        D3DXVECTOR3 pos;

};

---

well all i can see from code posted is that you are not calling Render through an object. Does CVisualization publically inherit from CGfxEntity or CGfxEntitySprite ? If not you will need to call Render thru an object. The compiler sees that call as a call to a global function Render and rightly complains because it doesnt exist.

visualisation doesnt inherit from either of the two classes. how would i call it through an object? make an instance of the class GfxEntitySprite. then do something like GfxEntitySprite.Render() ?

yep. something like that. Depends on what constructors that class supports.