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/*
Copyright 2019, 2020 Frederic Vincent, Thibaut Paumard, Nicolas Aimar
This file is part of Gyoto.
Gyoto 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.
Gyoto 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 Gyoto. If not, see <http://www.gnu.org/licenses/>.
*/
#include "GyotoUtils.h"
#include "GyotoFreeStar.h"
#include "GyotoProperty.h"
#include "GyotoPhoton.h"
#include "GyotoPowerLawSpectrum.h"
#include "GyotoBlackBodySpectrum.h"
#include "GyotoFactoryMessenger.h"
#include <iostream>
#include <cmath>
#include <string>
#include <cstdlib>
#include <float.h>
#include <sstream>
#include <string.h>
using namespace std;
using namespace Gyoto;
using namespace Gyoto::Astrobj;
/// Properties
GYOTO_PROPERTY_START(Gyoto::Astrobj::FreeStar,
"UniformSphere with a user defined orbit (not time-like).")
GYOTO_PROPERTY_VECTOR_DOUBLE(FreeStar, InitPosition, initPosition,
"(t,r,theta,phi) initial position of freeStar")
GYOTO_PROPERTY_VECTOR_DOUBLE(FreeStar, InitVelocity, initVelocity,
"(dr/dt,dtheta/dt,dphi/dt) initial 3-velocity of freeStar")
GYOTO_PROPERTY_END(FreeStar, UniformSphere::properties)
FreeStar::FreeStar() :
UniformSphere("FreeStar"),
posSet_(false),
posIni_(NULL),
fourveldt_(NULL)
{
kind_="FreeStar";
# ifdef GYOTO_DEBUG_ENABLED
GYOTO_DEBUG << "done." << endl;
# endif
posIni_= new double[4];
fourveldt_= new double[4];
}
FreeStar::FreeStar(const FreeStar& orig) :
UniformSphere(orig),
posSet_(orig.posSet_),
posIni_(NULL),
fourveldt_(NULL)
{
if(orig.posIni_){
posIni_= new double[4];
memcpy(posIni_,orig.posIni_, 4*sizeof(double));
}
if(orig.fourveldt_){
fourveldt_= new double[4];
memcpy(fourveldt_,orig.fourveldt_, 4*sizeof(double));
}
}
FreeStar* FreeStar::clone() const { return new FreeStar(*this); }
FreeStar::~FreeStar() {
if (debug()) cerr << "DEBUG: FreeStar::~FreeStar()\n";
}
string FreeStar::className() const { return string("FreeStar"); }
string FreeStar::className_l() const { return string("freeStar"); }
void FreeStar::initPosition(std::vector<double> const &v) {
posIni_[0] = v[0];
posIni_[1] = v[1];
posIni_[2] = v[2];
posIni_[3] = v[3];
posSet_=true;
}
std::vector<double> FreeStar::initPosition() const {
std::vector<double> v (4, 0.);
v[0] = posIni_[0];
v[1] = posIni_[1];
v[2] = posIni_[2];
v[3] = posIni_[3];
return v;
}
void FreeStar::initVelocity(std::vector<double> const &v) {
if (!posSet_)
GYOTO_ERROR("In FreeStar::initVelocity initial Position not defined");
fourveldt_[1] = v[0];
fourveldt_[2] = v[1];
fourveldt_[3] = v[2];
fourveldt_[0] = 1.;
double sum = 0;
double g[4][4];
gg_->gmunu(g, posIni_);
for (int i=0;i<4;++i) {
for (int j=0;j<4;++j) {
sum+=g[i][j]*fourveldt_[i]*fourveldt_[j];
}
}
if (sum>=0)
GYOTO_ERROR("In FreeStar::initVelocity Initial Velocity over C");
gg_->normalizeFourVel(posIni_, fourveldt_);
}
std::vector<double> FreeStar::initVelocity() const {
std::vector<double> v (3, 0.);
v[0] = fourveldt_[1];
v[1] = fourveldt_[2];
v[2] = fourveldt_[3];
return v;
}
void FreeStar::initCoord(std::vector<double> const &v) {
posIni_[0] = v[0];
posIni_[1] = v[1];
posIni_[2] = v[2];
posIni_[3] = v[3];
fourveldt_[0] = v[4];
fourveldt_[1] = v[5];
fourveldt_[2] = v[6];
fourveldt_[3] = v[7];
}
std::vector<double> FreeStar::initCoord() const {
std::vector<double> v (8, 0.);
v[0] = posIni_[0];
v[1] = posIni_[1];
v[2] = posIni_[2];
v[3] = posIni_[3];
v[4] = fourveldt_[0];
v[5] = fourveldt_[1];
v[6] = fourveldt_[2];
v[7] = fourveldt_[3];
return v;
}
void FreeStar::getCartesian(double const * const dates, size_t const n_dates,
double * const x, double * const y, double * const z,
double * const xprime, double * const yprime, double * const zprime){
// this yields the position of the center of the UnifSphere
// at time t
// fourveldt_ is the initial 3-velocity dxi/dt
// vel is the 4-velocity dxnu/dtau
if (n_dates!=1)
GYOTO_ERROR("In FreeStar::getCartesian n_dates!=1");
double tt=dates[0];
double r, theta, phi; // spherical coordinates
double vel[4];
getVelocity(posIni_, vel);
r = posIni_[1]+vel[1]/vel[0]*(tt-posIni_[0]);
theta = posIni_[2]+vel[2]/vel[0]*(tt-posIni_[0]);
phi = posIni_[3] + vel[3]/vel[0]*(tt-posIni_[0]);
// Convertion into cartesian coordinates
x[0] = r*sin(theta)*cos(phi);
y[0] = r*sin(theta)*sin(phi);
z[0] = r*cos(theta);
if (xprime!=NULL && yprime!=NULL && zprime!=NULL)
{
xprime[0] = r*sin(theta)*sin(phi)*vel[2];
yprime[0] = -r*sin(theta)*cos(phi)*vel[2];
zprime[0] = 0.;
}
}
void FreeStar::getVelocity(double const pos[4], double vel[4]){
if (!gg_)
GYOTO_ERROR("In FreeStar::getVelocity Metric not set");
vel[0] = fourveldt_[0];
vel[1] = fourveldt_[1];
vel[2] = fourveldt_[2];
vel[3] = fourveldt_[3];
}
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