//-----------------------------------------------------------------------------+
// Copyright (C), 1998-2007, Beijing Tangent Software Co. Ltd.
// = FileName	:   TPGeLandform.cpp
// = Version	:   ver2.0
// = Author		:   xlc
// = CreateDate	:   2002-09-09
// = Description:   类的定义
// = Maintainers: 
//                  
//-----------------------------------------------------------------------------+
#include "StdAfx.h"
#include "TPGeLandform.h"
#include "TPGeGridLine.h"

TPGeLandform::TPGeLandform()
{

}

TPGeLandform::~TPGeLandform()
{
	
}


const TPGeCurve2D& TPGeLandform::Outline()const
{
	return GetPData(0);
}

double TPGeLandform::GetDistX()const
{
	return m_fDistX;
}

double TPGeLandform::GetDistY()const
{
	return m_fDistY;
}

double TPGeLandform::GetElev()const
{
	return Outline().GetElev();
}

bool TPGeLandform::IsValid()const
{
	if (IsEmpty())
	{
		return false;
	}

	for (long i = 0; i < GetLength();i++)
	{
		const TPGeCurve2D*pCurve = GetAt(i);
		if (pCurve == NULL  ||  !pCurve->IsValid())
		{
			return false;
		}
	}

	if (!Outline().IsClosed() || Outline().IsSelfCross() || Outline().IsClockwise())
	{
		return false;
	}

	return true;
}

bool TPGeLandform::Append(TPGeCurve2D* pCurve)
{
	if (!pCurve->IsValid())
		return false;

	if (IsEmpty())
	{
		if (!pCurve->IsClosed() || pCurve->IsSelfCross())
		{
			return false;
		}

		if (pCurve->IsClockwise())
		{
			pCurve->Reverse();	
		}
	}

	AddTail(pCurve);
	return true;
}


bool TPGeLandform::CreateGridData(double fDistX,double fDistY,TGObjectList&mlines,int fitType)
{
	if (!IsValid())
		return false;

	m_allGridLineX.Clear();
	m_allGridLineY.Clear();
	m_allGridNode.Clear();
	m_allGridCell.Clear();
	m_fDistX = fDistX;
	m_fDistY = fDistY;

	TPGeExtend2D ext;
	Outline().GetExtend2D(ext);

	double extHeight = ext.GetHeight();
	double extLength = ext.GetLength();
	double fRowNum = extHeight / m_fDistY;
	double fColNum = extLength / m_fDistX;
	long nRowNum = (long)fRowNum;
	long nColNum = (long)fColNum;
	if (UP_ZERO(fRowNum - nRowNum))
	{
		nRowNum += 1;
	}

	if (UP_ZERO(fColNum - nColNum))
	{
		nColNum += 1;
	}

	m_allGridLineX.Realloc(nRowNum + 1);
	for (long i = 0; i <= nRowNum; i++)
	{
		double y = ext.GetYExtend().GetMin() + i * m_fDistY;
		TPGeGridLine &line = m_allGridLineX[i];
		line.SetPoint(TGPoint(ext.GetXExtend().GetMin() - 2 * m_fDistX,y),TGPoint(ext.GetXExtend().GetMax() + 2 * m_fDistX,y));
		line.m_allSeg.Realloc(nColNum);
		line.CreateFrom(this,true,ext.GetXExtend().GetMin());
	}

	m_allGridLineY.Realloc(nColNum + 1);
	for (i = 0; i <= nColNum; i++)
	{
		double x = ext.GetXExtend().GetMin() + i * m_fDistX;
		TPGeGridLine &line = m_allGridLineY[i];
		line.SetPoint(TGPoint(x,ext.GetYExtend().GetMin() - 2 * m_fDistY),TGPoint(x,ext.GetYExtend().GetMax() + 2 * m_fDistY));
		line.m_allSeg.Realloc(nRowNum);
		line.CreateFrom(this,false,ext.GetYExtend().GetMin());
	}

	m_allGridNode.Realloc(nRowNum + 1,nColNum + 1,false);
	for (i = 0; i <= nRowNum; i++)
	{
		double y = ext.GetYExtend().GetMin()+i*m_fDistY;
		for (long j = 0; j <= nColNum; j++)
		{
			double x = ext.GetXExtend().GetMin() + j * m_fDistX;
			TPGeGridNode &pt = m_allGridNode[i][j];
			pt.x = x;
			pt.y = y;
			double e1 = m_allGridLineX[i].GetElev(pt.x);
			double e2 = m_allGridLineY[j].GetElev(pt.y);

			if (fitType==1)
			{
				pt.z = sqrt((e1 * e1 + e2 * e2) / 2);
			}
			else
			{
				pt.z = (e1 + e2) / 2;
			}

			pt.SetVisible(m_allGridLineX[i].IsVisible(pt.x) && m_allGridLineY[j].IsVisible(pt.y));
		}
	}

	m_allGridCell.Realloc(nRowNum,nColNum,false);
	for (i = 0;i < nRowNum; i++)
	{
		for (long j = 0;j < nColNum; j++)
		{
			TPGeGridCell& cell = m_allGridCell[i][j];
			cell.m_allNode[0] = &m_allGridNode[i][j];
			cell.m_allNode[1] = &m_allGridNode[i][j+1];			
			cell.m_allNode[2] = &m_allGridNode[i+1][j+1];			
			cell.m_allNode[3] = &m_allGridNode[i+1][j];			

			cell.m_allSeg[0] = m_allGridLineX[i].m_allSeg[j];
			cell.m_allSeg[1] = m_allGridLineY[j+1].m_allSeg[i];
			cell.m_allSeg[2] = m_allGridLineX[i+1].m_allSeg[j];
			cell.m_allSeg[3] = m_allGridLineY[j].m_allSeg[i];

			cell.Make3DFace(Outline(),mlines);
		}
	}
	return true;
}