openEMS/FDTD/processcurrent.cpp

/*
*	Copyright (C) 2010 Thorsten Liebig (Thorsten.Liebig@gmx.de)
*
*	This program is free software: you can redistribute it and/or modify
*	it under the terms of the GNU General Public License as published by
*	the Free Software Foundation, either version 3 of the License, or
*	(at your option) any later version.
*
*	This program is distributed in the hope that it will be useful,
*	but WITHOUT ANY WARRANTY; without even the implied warranty of
*	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*	GNU General Public License for more details.
*
*	You should have received a copy of the GNU General Public License
*	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "tools/global.h"
#include "processcurrent.h"
#include <iomanip>

ProcessCurrent::ProcessCurrent(Operator* op, Engine* eng) : ProcessIntegral(op, eng)
{
	m_TimeShift = op->GetTimestep()/2.0;
	m_dualMesh = true;
}

ProcessCurrent::~ProcessCurrent()
{
}

double ProcessCurrent::CalcIntegral()
{
	FDTD_FLOAT current=0;

	int Dump_Dim = 0;
	int NormDir = 0;

	for (int n=0;n<3;++n)
	{
		if (start[n]>stop[n])
		{
			unsigned int help=start[n];
			start[n]=stop[n];
			stop[n]=help;
			bool b_help=m_start_inside[n];
			m_start_inside[n] = m_stop_inside[n];
			m_stop_inside[n] = b_help;
		}
		if (m_stop_inside[n]==false) // integrate up to the wall, Operator::SnapToMesh would give numLines[n]-2
			stop[n]=Op->GetNumberOfLines(n)-1;

		if (stop[n]>start[n])
			++Dump_Dim;
		if (stop[n] == start[n])
			NormDir = n;
	}

	if (Dump_Dim!=2)
	{
		cerr << "ProcessCurrent::Process(): Warning Current Integration Box \"" << m_filename << "\" is not a surface (found dimension: " << Dump_Dim << ") --> i = 0" << endl;
		current = 0;
		return 0.0;
	}

	switch (NormDir)
	{
	case 0:
		//y-current
		if (m_stop_inside[0] && m_start_inside[2])
			for (unsigned int i=start[1]+1;i<=stop[1];++i)
				current+=Eng->GetCurr(1,stop[0],i,start[2]);
		//z-current
		if (m_stop_inside[0] && m_stop_inside[1])
			for (unsigned int i=start[2]+1;i<=stop[2];++i)
				current+=Eng->GetCurr(2,stop[0],stop[1],i);
		//y-current
		if (m_start_inside[0] && m_stop_inside[2])
			for (unsigned int i=start[1]+1;i<=stop[1];++i)
				current-=Eng->GetCurr(1,start[0],i,stop[2]);
		//z-current
		if (m_start_inside[0] && m_start_inside[1])
			for (unsigned int i=start[2]+1;i<=stop[2];++i)
				current-=Eng->GetCurr(2,start[0],start[1],i);
		break;
	case 1:
		//z-current
		if (m_start_inside[0] && m_start_inside[1])
			for (unsigned int i=start[2]+1;i<=stop[2];++i)
				current+=Eng->GetCurr(2,start[0],start[1],i);
		//x-current
		if (m_stop_inside[1] && m_stop_inside[2])
			for (unsigned int i=start[0]+1;i<=stop[0];++i)
				current+=Eng->GetCurr(0,i,stop[1],stop[2]);
		//z-current
		if (m_stop_inside[0] && m_stop_inside[1])
			for (unsigned int i=start[2]+1;i<=stop[2];++i)
				current-=Eng->GetCurr(2,stop[0],stop[1],i);
		//x-current
		if (m_start_inside[1] && m_start_inside[2])
			for (unsigned int i=start[0]+1;i<=stop[0];++i)
				current-=Eng->GetCurr(0,i,start[1],start[2]);
		break;
	case 2:
		//x-current
		if (m_start_inside[1] && m_start_inside[2])
			for (unsigned int i=start[0]+1;i<=stop[0];++i)
				current+=Eng->GetCurr(0,i,start[1],start[2]);
		//y-current
		if (m_stop_inside[0] && m_start_inside[2])
			for (unsigned int i=start[1]+1;i<=stop[1];++i)
				current+=Eng->GetCurr(1,stop[0],i,start[2]);
		//x-current
		if (m_stop_inside[1] && m_stop_inside[2])
			for (unsigned int i=start[0]+1;i<=stop[0];++i)
				current-=Eng->GetCurr(0,i,stop[1],stop[2]);
		//y-current
		if (m_start_inside[0] && m_stop_inside[2])
			for (unsigned int i=start[1]+1;i<=stop[1];++i)
				current-=Eng->GetCurr(1,start[0],i,stop[2]);
		break;
	default:
		//this cannot happen...
		return 0.0;
		break;
	}

	return current;
}