#ifndef SafeDelete
#define SafeDelete(p)       { if(p) { delete (p);     (p)=NULL; } }
#endif    
#ifndef SafeDeleteArray
#define SafeDeleteArray(p) { if(p) { delete[] (p);   (p)=NULL; } }
#endif    
#ifndef SafeRelease
#define SafeRelease(p)      { if(p) { (p)->Release(); (p)=NULL; } }
#endif


//實(shí)現(xiàn)靜態(tài)網(wǎng)格，用于加載場(chǎng)景模型，實(shí)現(xiàn)碰撞檢測(cè)
class CMesh
{
private:
	D3DXVECTOR3 m_vPos;
	D3DXVECTOR3 m_vMin,m_vMax;//方盒最小點(diǎn)最大點(diǎn)，本地坐標(biāo)系
	
	float m_fAngle;
	float m_fScale;

	LPD3DXMESH m_pMesh;
	LPDIRECT3DDEVICE9 m_pDevice;
	DWORD m_dwNumOfMaterials;//材質(zhì)數(shù)量
	D3DMATERIAL9 *m_pMeshMaterials;//材質(zhì)指針
	LPDIRECT3DTEXTURE9 *m_pMeshTextures;//貼圖指針
public:
	void SetPosition(float x,float y,float z)
	{
		m_vPos.x=x;
		m_vPos.y=y;
		m_vPos.z=z;
		m_fScale=1.0f;
		m_fAngle=0;
	}
	CMesh(LPDIRECT3DDEVICE9 pDevice,char *strMesh,BOOL bOptimize);
	virtual ~CMesh();
	void Render();
	void Optimize();
	void GetBoundingBox(D3DXVECTOR3 *pVmin,D3DXVECTOR3 *pVmax)//?
    {
		*pVmin=m_vMin+m_vPos;
		*pVmax=m_vMax+m_vPos;
	}

//實(shí)現(xiàn)方盒碰撞
LRESULT CollisionTest(CMesh *pMesh)
{
	return(m_vMin.x<pMesh->m_vMax.x && 
		   m_vMin.y<pMesh->m_vMax.y &&
		   m_vMin.z<pMesh->m_vMax.z &&
		   m_vMax.x>pMesh->m_vMin.x &&
		   m_vMax.y>pMesh->m_vMin.y &&
		   m_vMax.z>pMesh->m_vMin.z
		   );
}
};