#include "stdafx.h"
#include "resource.h"
#include "ThunderCaculate.h"
#include "LightningRodData.h"

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


TGThunderCaculate::TGThunderCaculate()
{

}

TGThunderCaculate::~TGThunderCaculate()
{

}

//通过避雷针数据进行计算
void  TGThunderCaculate::CaculateThunderData(const TGLightningRodData *pData)
{
	if (pData == NULL)
		return;

	m_result.m_dGroundRadius = pData->GetGroundRadius();
	m_result.m_dHeight = pData->GetHeight();
	m_result.m_nNumber = pData->GetNumber();
	m_result.m_nGroupNO = pData->GetGroupNO();

 	m_result.m_arProHeight.setLogicalLength(0);
 	m_result.m_arProHeight.append(pData->m_arProtecedHeight);
	
	pData->GetInsertPoint(m_result.m_ptInsert);
	pData->GetObjectID(m_result.m_id);

	//建筑物高度为0的保护高度
	m_result.m_dProRadius = pow(m_result.m_dHeight*(2*m_result.m_dGroundRadius - m_result.m_dHeight),0.5);

	//得到滚球圆心坐标 ptCen为返回值，其他为输入值
	GetGroundCenter(m_result.m_ptInsert,m_result.m_dHeight,m_result.m_dGroundRadius,m_result.m_ptGroundCenter);
}

bool TGThunderCaculate::DocGetMeterUnitDraw()
{
	struct resbuf rb;
	acedGetVar(_T("INSUNITS"),&rb);

	if (rb.resval.rint  == AcDb::kUnitsMeters)
	{
		return true;
	}
	return false;
}

//得到滚球圆心坐标 ptCen为返回值，其他为输入值
void  TGThunderCaculate::GetGroundCenter(const AcGePoint3d ptInsert,double dHeight,double dGroundRadius,AcGePoint3d& ptCen)
{
	if (!DocGetMeterUnitDraw())
	{
		dHeight = dHeight * 1000;
		dGroundRadius = dGroundRadius * 1000;
	}

	AcGePoint3d ptPin,ptStart,ptEnd;
	ptPin = ptInsert;
	ptPin.z = dHeight;
	ptStart = ptInsert;

	ptStart.z = dGroundRadius;

	ptEnd = ptStart;
	ptEnd.y += dGroundRadius;

	AcDbLine line(ptStart,ptEnd);
	AcGePoint3dArray  arPt;
	AcDbCircle circle(ptPin,AcGeVector3d::kXAxis,dGroundRadius);
	line.intersectWith(&circle,AcDb::kExtendThis,arPt);

	if (arPt.length() > 0)
	{
		ptCen = arPt[0];
	}

}