//-------------------------------------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TGMesh Àà
// = Version	:   ver2.0
// = Author		:   wlw
// = CreateDate	:   2002-09-09
// = Description:   TGMesh ¶¨Òå
// = Maintainers: 
//                  
//-------------------------------------------------------------------------------------------------------+
#include "StdAfx.h"
#include "TGMesh.h"
#include "TGMCurve2D.h"

TGMesh::~TGMesh()
{

}

bool TGMesh::operator>(const TGMesh&)const
{
	return false;
}

bool TGMesh::operator<(const TGMesh&)const
{
	return false;
}

void TGMesh::ExplodeSelfCross(TPDList<TGMesh> &lstMesh)
{
	TDualPtrList<const TGMeshNode*> lstNode;

	const TGMeshNode* pStartNode;
	const TGMeshEdge* pEdge0 = GetAt(0);
	if(pEdge0->m_pMesh1  ==  this)
	{
		pStartNode = pEdge0->GetNode(1);
	}
	else 
	{
		pStartNode = pEdge0->GetNode(2);
	}
	
	for(MoveToFirst();!IsOut();MoveToNext())
	{
		long index = lstNode.Find(pStartNode);
		if(index == NOT_FOUND)
		{
			lstNode<<pStartNode;
		}
		else
		{
			TGMesh tail;
			SplitAtCur(tail);

			TGMesh *pMesh = new TGMesh;
			SplitAt(index,*pMesh);
			for(pMesh->MoveToFirst();!pMesh->IsOut();pMesh->MoveToNext())
			{
				TGMeshEdge *pEdge = pMesh->GetCurData();
				if(pEdge->m_pMesh1 == this)
				{
					pEdge->m_pMesh1 = pMesh;
				}
				else
				{
					pEdge->m_pMesh2 = pMesh;
				}
			}

			lstMesh<<pMesh;
			
			Conbine(tail);

			lstNode.Clear();
			ExplodeSelfCross(lstMesh);
			break;
		}

		if(GetCurData()->GetNode(1)!=pStartNode)
		{
			pStartNode = GetCurData()->GetNode(1);
		}
		else
		{
			pStartNode = GetCurData()->GetNode(2);
		}
	}
}

TPGeCurve2D* TGMesh::CreateCurve()
{
	if(GetLength() == 1)
	{
		return new TGMCurve2D(*GetAt(0)->GetCurve());
	}

	TGMCurve2D* pCurve = new TGMCurve2D;
	const TGMeshNode*pStartNode;
	const TGMeshEdge*pEdge0 = GetAt(0);
	if(pEdge0->m_pMesh1 == this)
	{
		pStartNode = pEdge0->GetNode(1);
	}
	else 
	{
		pStartNode = pEdge0->GetNode(2);
	}
	for(MoveToFirst();!IsOut();MoveToNext())
	{
		TPGeCurve2D* pSeg = (TPGeCurve2D*)(GetCurData()->GetCurve()->Clone());
		if(GetCurData()->GetNode(1)!=pStartNode)
		{
			pSeg->Reverse();
			pStartNode = GetCurData()->GetNode(1);
		}
		else
		{
			pStartNode = GetCurData()->GetNode(2);
		}

		pCurve->AddTail(pSeg);
	}
	return pCurve;
}