entity.cpp

这是我自己写的从数据库中读出数据

// Entity.cpp: implementation of the CEntity class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "Mine.h"
#include "Entity.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif


extern CNode *g_pNodeHead;
extern CEdge *g_pEdgeHead;
extern CPolygon *g_pPolygonHead;
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CEntity::CEntity()
{

}

CEntity::~CEntity()
{

}

CNode* CEntity::InitNode()
{
	CNode *node;
    node =new CNode;
	//链表维护
	node->next = g_pNodeHead->next;
	node->prev = g_pNodeHead;
	g_pNodeHead->next = node;
	
	node->next->prev  = node;
	//属性赋值
    m_nNodeNum++;
	node->m_nNodeID = m_nNodeNum;
	node->m_CDNode=false;
	return node;

}

CEdge* CEntity::InitEdge()
{
	CEdge *edge;
	edge = new CEdge;
	//链表维护
	edge->next = g_pEdgeHead->next;
	edge->prev = g_pEdgeHead;
    g_pEdgeHead->next = edge;
	edge->next->prev  = edge;
	//属性赋值
	m_nEdgeNum++;
	edge->m_nEdgeID = m_nEdgeNum;
	//edge->IsExchange =true;
	
	
	return edge;

}

CPolygon* CEntity::InitPolygon()
{
	CPolygon *polygon;
    polygon =new CPolygon;
	//链表维护
	polygon->next = g_pPolygonHead->next;
	polygon->prev = g_pPolygonHead;
	g_pPolygonHead->next = polygon;
	polygon->next->prev  = polygon;
	//属性赋值
	m_nPolygonNum++;
	polygon->m_nPolygonID = m_nPolygonNum;
	
	
	return polygon;

}