openEMS/FDTD/engine.cpp

143 lines
4.4 KiB
C++

/*
* 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 "engine.h"
#include "tools/array_ops.h"
//! \brief construct an Engine instance
//! it's the responsibility of the caller to free the returned pointer
Engine* Engine::New(const Operator* op)
{
Engine* e = new Engine(op);
e->Init();
return e;
}
Engine::Engine(const Operator* op)
{
Op = op;
}
Engine::~Engine()
{
Reset();
}
void Engine::Init()
{
numTS = 0;
volt = Create_N_3DArray(Op->numLines);
curr = Create_N_3DArray(Op->numLines);
}
void Engine::Reset()
{
Delete_N_3DArray(volt,Op->numLines);
volt=NULL;
Delete_N_3DArray(curr,Op->numLines);
curr=NULL;
}
inline void Engine::UpdateVoltages()
{
unsigned int pos[3];
bool shift[3];
//voltage updates
for (pos[0]=0;pos[0]<Op->numLines[0];++pos[0])
{
shift[0]=pos[0];
for (pos[1]=0;pos[1]<Op->numLines[1];++pos[1])
{
shift[1]=pos[1];
for (pos[2]=0;pos[2]<Op->numLines[2];++pos[2])
{
shift[2]=pos[2];
//do the updates here
//for x
volt[0][pos[0]][pos[1]][pos[2]] *= Op->vv[0][pos[0]][pos[1]][pos[2]];
volt[0][pos[0]][pos[1]][pos[2]] += Op->vi[0][pos[0]][pos[1]][pos[2]] * ( curr[2][pos[0]][pos[1]][pos[2]] - curr[2][pos[0]][pos[1]-shift[1]][pos[2]] - curr[1][pos[0]][pos[1]][pos[2]] + curr[1][pos[0]][pos[1]][pos[2]-shift[2]]);
//for y
volt[1][pos[0]][pos[1]][pos[2]] *= Op->vv[1][pos[0]][pos[1]][pos[2]];
volt[1][pos[0]][pos[1]][pos[2]] += Op->vi[1][pos[0]][pos[1]][pos[2]] * ( curr[0][pos[0]][pos[1]][pos[2]] - curr[0][pos[0]][pos[1]][pos[2]-shift[2]] - curr[2][pos[0]][pos[1]][pos[2]] + curr[2][pos[0]-shift[0]][pos[1]][pos[2]]);
//for z
volt[2][pos[0]][pos[1]][pos[2]] *= Op->vv[2][pos[0]][pos[1]][pos[2]];
volt[2][pos[0]][pos[1]][pos[2]] += Op->vi[2][pos[0]][pos[1]][pos[2]] * ( curr[1][pos[0]][pos[1]][pos[2]] - curr[1][pos[0]-shift[0]][pos[1]][pos[2]] - curr[0][pos[0]][pos[1]][pos[2]] + curr[0][pos[0]][pos[1]-shift[1]][pos[2]]);
}
}
}
}
inline void Engine::ApplyVoltageExcite()
{
int exc_pos;
//soft voltage excitation here (E-field excite)
for (unsigned int n=0;n<Op->E_Exc_Count;++n)
{
exc_pos = (int)numTS - (int)Op->E_Exc_delay[n];
exc_pos *= (exc_pos>0 && exc_pos<=(int)Op->ExciteLength);
// if (n==0) cerr << numTS << " => " << Op->ExciteSignal[exc_pos] << endl;
volt[Op->E_Exc_dir[n]][Op->E_Exc_index[0][n]][Op->E_Exc_index[1][n]][Op->E_Exc_index[2][n]] += Op->E_Exc_amp[n]*Op->ExciteSignal[exc_pos];
}
}
inline void Engine::UpdateCurrents()
{
unsigned int pos[3];
for (pos[0]=0;pos[0]<Op->numLines[0]-1;++pos[0])
{
for (pos[1]=0;pos[1]<Op->numLines[1]-1;++pos[1])
{
for (pos[2]=0;pos[2]<Op->numLines[2]-1;++pos[2])
{
//do the updates here
//for x
curr[0][pos[0]][pos[1]][pos[2]] *= Op->ii[0][pos[0]][pos[1]][pos[2]];
curr[0][pos[0]][pos[1]][pos[2]] += Op->iv[0][pos[0]][pos[1]][pos[2]] * ( volt[2][pos[0]][pos[1]][pos[2]] - volt[2][pos[0]][pos[1]+1][pos[2]] - volt[1][pos[0]][pos[1]][pos[2]] + volt[1][pos[0]][pos[1]][pos[2]+1]);
//for y
curr[1][pos[0]][pos[1]][pos[2]] *= Op->ii[1][pos[0]][pos[1]][pos[2]];
curr[1][pos[0]][pos[1]][pos[2]] += Op->iv[1][pos[0]][pos[1]][pos[2]] * ( volt[0][pos[0]][pos[1]][pos[2]] - volt[0][pos[0]][pos[1]][pos[2]+1] - volt[2][pos[0]][pos[1]][pos[2]] + volt[2][pos[0]+1][pos[1]][pos[2]]);
//for z
curr[2][pos[0]][pos[1]][pos[2]] *= Op->ii[2][pos[0]][pos[1]][pos[2]];
curr[2][pos[0]][pos[1]][pos[2]] += Op->iv[2][pos[0]][pos[1]][pos[2]] * ( volt[1][pos[0]][pos[1]][pos[2]] - volt[1][pos[0]+1][pos[1]][pos[2]] - volt[0][pos[0]][pos[1]][pos[2]] + volt[0][pos[0]][pos[1]+1][pos[2]]);
}
}
}
}
inline void Engine::ApplyCurrentExcite()
{
int exc_pos;
}
bool Engine::IterateTS(unsigned int iterTS)
{
for (unsigned int iter=0;iter<iterTS;++iter)
{
UpdateVoltages();
ApplyVoltageExcite();
UpdateCurrents();
ApplyCurrentExcite();
++numTS;
}
return true;
}