问一下关于一个函数返回的问题

lava555 2009-05-08 09:40:17

有一个如下函数：



//-----------------------------------------------------------------------------

// Desc: 从文件加载蒙皮网格模型

//-----------------------------------------------------------------------------

HRESULT CAnimMesh::LoadFromXFile(WCHAR *strFileName)

{

    HRESULT hr;



	//根据文件名, 从指定的路经查找文件

	WCHAR strPath[MAX_PATH];

	DXUTFindDXSDKMediaFileCch( strPath, sizeof(strPath) / sizeof(WCHAR), strFileName );



	//从.X文件加载层次框架和动画数据

    V_RETURN(D3DXLoadMeshHierarchyFromX(strPath, D3DXMESH_MANAGED, m_pd3dDevice, 

		                            m_pAlloc, NULL, &m_pFrameRoot, &m_pAnimController));

	

	//计算框架对象的边界球

    V_RETURN(D3DXFrameCalculateBoundingSphere(m_pFrameRoot, &m_vObjectCenter, &m_fObjectRadius));



	return S_OK;

}

其中类CAnimMesh的定义如下：

class CAnimMesh

{

private:

	CAllocateHierarchy*         m_pAlloc;

	LPDIRECT3DDEVICE9			m_pd3dDevice;

	LPD3DXFRAME					m_pFrameRoot;



public:

	D3DXVECTOR3   m_vObjectCenter;

	float         m_fObjectRadius;

	BOOL		  m_bPlayAnim;

	LPD3DXANIMATIONCONTROLLER	m_pAnimController;



private:

	HRESULT LoadFromXFile(WCHAR* strFileName);

	VOID    UpdateFrameMatrices( LPD3DXFRAME pFrameBase, LPD3DXMATRIX pParentMatrix ); 



	VOID DrawFrame(LPD3DXFRAME pFrame);

	VOID DrawMeshContainer(LPD3DXMESHCONTAINER pMeshContainerBase, LPD3DXFRAME pFrameBase);



public:

	HRESULT Create(LPDIRECT3DDEVICE9 pD3DDevice, WCHAR* strFileName);

	HRESULT Render(D3DXMATRIXA16* matWorld, double fElapsedAppTime);

	HRESULT Destory();



public:

	CAnimMesh();

	virtual ~CAnimMesh();

};

我自己又定义了一个类:





#pragma once



#include "AnimMesh.h"





class Xfile

{

private:

	CAnimMesh*         m_pAnimMesh;          //动画网格模型

	D3DXMATRIXA16      m_matWorld;           //世界矩阵

	Xfile              *next;



public:







	D3DXVECTOR3   m_vCurPos;       //当前位置

	float         m_fVelocity;     //运动速度

 

	float         m_fFangxiangJue; //

	float         m_fFuyangJue;    //方向角

	float         m_fCeqingJue;



	bool          m_bMoving;       //标志喷洒车是否处于运动状态

	//bool          m_bQianPen;      //标志喷洒车是否前喷

	//bool          m_bHouPen;       //标志喷洒车是否后喷



public:

	HRESULT   Create(LPDIRECT3DDEVICE9 pd3dDevice, WCHAR* strFileName,Xfile *next);

	HRESULT   Restore(LPDIRECT3DDEVICE9 pd3dDevice);

	HRESULT   Render(LPDIRECT3DDEVICE9 pd3dDevice, float fTimePerFrame=0.0f ,float scalex=1.0f,float scaley=1.0f,float scalez=1.0f);

	HRESULT   Invalidate();

	HRESULT   Destroy();



    //构造函数与析构函数



	Xfile(void);

	~Xfile(void);

};

在实现Xfile类的.cpp文件里create代码如下：

//-----------------------------------------------------------------------------

// Desc: 加载网格对象, 创建喷洒粒子系统

//-----------------------------------------------------------------------------

HRESULT Xfile::Create( LPDIRECT3DDEVICE9 pd3dDevice, WCHAR* strFileName,Xfile *n)

{

	HRESULT  hr = S_OK;



	next=n;



	////创建喷洒车网格模型对象

	m_pAnimMesh = new CAnimMesh();

	V_RETURN(m_pAnimMesh->Create(pd3dDevice, strFileName));



	////创建喷洒粒子系统对象

	//m_pSprayParticles = new CParticleSystem(500,2000);

	//m_pSprayParticles->Create(pd3dDevice);



	return hr;

}

问题：在主函数里怎么接收在HRESULT CAnimMesh::LoadFromXFile(WCHAR *strFileName)里返回的边界球值？？
即：
//计算框架对象的边界球
V_RETURN(D3DXFrameCalculateBoundingSphere(m_pFrameRoot, &m_vObjectCenter, &m_fObjectRadius));

是不是要定义一个callback函数？？比如以下两个函数：
bool CALLBACK IsDeviceAcceptable( D3DCAPS9* pCaps, D3DFORMAT AdapterFormat, D3DFORMAT BackBufferFormat, bool bWindowed, void* pUserContext );//定义

DXUTCreateDevice( D3DADAPTER_DEFAULT, true, 640, 480,
IsDeviceAcceptable, ModifyDeviceSettings );///这个在主函数里

主函数:

INT WINAPI WinMain( HINSTANCE, HINSTANCE, LPSTR, int )

{

    //为Debug配置启用运行时内存检查功能

#if defined(DEBUG) | defined(_DEBUG)

    _CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );

#endif



    //设置回调函数

    DXUTSetCallbackDeviceCreated( OnCreateDevice );

    DXUTSetCallbackDeviceReset( OnResetDevice );

    DXUTSetCallbackDeviceLost( OnLostDevice );

    DXUTSetCallbackDeviceDestroyed( OnDestroyDevice );

    DXUTSetCallbackMsgProc( MsgProc );

    DXUTSetCallbackKeyboard( KeyboardProc );

    DXUTSetCallbackFrameRender( OnFrameRender );

    DXUTSetCallbackFrameMove( OnFrameMove );



	//应用程序相关的初始化

	InitApp();



	//初始化DXUT, 创建窗口, 创建Direct3D设备对象

	DXUTInit( true, true, true );

	DXUTSetCursorSettings( true, true );

	DXUTCreateWindow( L"实验" );

	DXUTCreateDevice( D3DADAPTER_DEFAULT, true, 640, 480, 

		IsDeviceAcceptable, ModifyDeviceSettings );



	//进入消息循环和场景渲染

	DXUTMainLoop();



	//在此进行应用程序相关的清除工作



	return DXUTGetExitCode();

}