4 replies to this topic

[TheLionKing]

Hi,

I am creating a game in DirectX. I have tried to implement everything through classes. Here is how it goes:

class cApplication
{
 ...
 ...
 ...
 private:
     cDirectX DirectX;
     cGame    Game;
};


class cDirectX
{
 ...
 ...
 ...
 private:
     cDirect3D Direct3D;
};


class cDirect3D
{
 ...
 ...
 ...
 private:
     IDirect3DDevice9 *Device;
};

The problem is ... I want to use Device in cGame class. Device is setup in cDirect3D class.

An easy way is to create an external variable ... but that is not a classes approach :unsure: .

Is there anyway to access Device through cGame. I think its by pointers ... but how :confused: ... any guidelines :blush: ?

[baldurk]

Either pass the device via a function call or redesign the classes so that either the game class owns the device, or doesn't need to.

[Dia]

You could do this:

class cApplication
{
...
...
...
private:
    static cDirectX DirectX;
    cGame    Game;
public:
    static cDirectX* getDirectX()   { return &DirectX; }
};


class cDirectX
{
...
...
...
private:
    cDirect3D Direct3D;
public:
    cDirect3D* getDirect3D()   { return &Direct3D; }
};


class cDirect3D
{
...
...
...
private:
    IDirect3DDevice9 *Device;
public:
    IDirect3DDevice9* getDevice()  { return Device; }
};

and then in your cGame class, you would do:

    cApplication::getDirectX()->getDirect3D()->getDevice();

[TheLionKing]

:yes: Thanks. I think I got the picture ... I will try it tonight ... :) !

[TheLionKing]

:yes: Thanks apex ... got it working now!