/*! \param cfg Configuration Paramaters
*/
stop_on_ejection_params(const config &cfg)
{
rmax = cfg.optional("rmax",std::numeric_limits<float>::max());
deactivate_on = cfg.optional("deactivate_on_ejection",false);
log_on = cfg.optional("log_on_ejection",false);
verbose_on = cfg.optional("verbose_on_ejection",false);
}
bool validate_configuration(config& cfg){
bool valid = true; // Indicates whether cfg parameters are valid
int nsystems = cfg.optional("nsys",1000);
int nbodypersystem = cfg.optional("nbod",3);
// WARNING: blocksize isn't being used as the block size. Trying to remove this.
// int bs = cfg.optional("blocksize",16);
// Check that parameters from command line are ok
// if((bs<ENSEMBLE_CHUNK_SIZE)||(bs>64)) valid =false;
// if( bs % ENSEMBLE_CHUNK_SIZE != 0 ) valid = false;
if(!(nsystems>=1)||!(nsystems<=256000)) valid = false;
if(!(nbodypersystem>=3)||!(nbodypersystem<=MAX_NBODIES)) valid = false;
return valid;
}
void stability_test() {
defaultEnsemble &ens = current_ens;
double begin_time = ens.time_ranges().median;
double destination_time = cfg.optional("destination_time", begin_time + 10 * M_PI );
double interval = cfg.optional("interval", (destination_time-begin_time) ) ;
double logarithmic = cfg.optional("logarithmic", 0 ) ;
double allowed_deltaE = cfg.optional("allowed_deltaE", 0.01 );
if(destination_time < begin_time ) ERROR("Destination time should be larger than begin time");
if(interval < 0) ERROR("Interval cannot be negative");
if(interval < 0.001) ERROR("Interval too small");
if(logarithmic != 0 && logarithmic <= 1) ERROR("logarithm base should be greater than 1");
std::cout << "Time, Energy Conservation Factor (delta E/E), Active Systems" << std::endl;
for(double time = begin_time; time < destination_time; ) {
if(logarithmic > 1)
time = (time > 0) ? time * logarithmic : interval;
else
time += interval;
double effective_time = min(time,destination_time);
integ->set_destination_time ( effective_time );
DEBUG_OUTPUT(2, "Integrator ensemble" );
integ->integrate();
SYNC;
DEBUG_OUTPUT(2, "Check energy conservation" );
ensemble::range_t deltaE_range = energy_conservation_error_range(ens, initial_ens );
int active_systems = ens.nsys() - number_of_disabled_systems( ens );
std::cout << effective_time << ", " << deltaE_range.max << ", " << deltaE_range.median << ", " << active_systems << std::endl;
if(deltaE_range.median > allowed_deltaE){
INFO_OUTPUT(0, "At least half of systems are too unstable to conserve energy. dE/E: " << deltaE_range.median << std::endl );
exit(1);
}
}
}
void prepare_integrator () {
// Initialize Integrator
DEBUG_OUTPUT(2, "Initializing integrator" );
double begin_time = initial_ens.time_ranges().average;
double destination_time = cfg.optional("destination_time", begin_time + 10 * M_PI );
integ = integrator::create(cfg);
integ->set_ensemble(current_ens);
integ->set_destination_time ( destination_time );
SYNC;
}
/**
* This procedure was copied from the other Monte Carlo simulation code
*
* I had to change all the floats to double because in the new swarm we
* use double for masses. Also, our ensemble classes now use reference
* counted pointers and we create them in a functional way than old
* fill-this-for-me-please pointers(references). The generate name
* makes more sense that the set_initial_conditions. I only added
* one line for generating the ensemble. In the other monte carlo,
* the ensemble is generated first and then passed to this function
* to fill it in.
*
*
*/
defaultEnsemble generate_ensemble_with_randomized_initial_conditions(const config& cfg)
{
defaultEnsemble ens = defaultEnsemble::create( cfg.require("nbod",0), cfg.require("nsys",0) );
std::cerr << "# nsystems = " << ens.nsys() << " nbodies/system = " << ens.nbod() << "\n";
// std::cerr << "# Set initial time for all systems = ";
double time_init = cfg.optional("time_init", 0.0);
// std::cerr << time_init << ".\n";
const bool use_jacobi = cfg.optional("use_jacobi", 0);
bool keplerian_ephemeris = cfg.optional("use_keplerian", 1);
bool transit_ephemeris = cfg.optional("use_transit", 0);
if(transit_ephemeris) keplerian_ephemeris = 0;
assert(!(keplerian_ephemeris && transit_ephemeris)); // find a better way
for(unsigned int sys=0;sys<ens.nsys();++sys)
{
generate_initial_conditions_for_system(cfg,ens,sys,sys);
} // end loop over systems
return ens;
}
void write_stable_systems(defaultEnsemble &ens, defaultEnsemble &ens_init)
{
// find the stable ones and output the initial conditions for the stable
// ones in keplerian coordinates
// std::cerr << "# Finding stable system ids\n";
std::vector<unsigned int> stable_system_indices, unstable_system_indices;
for(int i = 0; i < ens.nsys() ; i++ )
{
if(ens[i].is_disabled())
unstable_system_indices.push_back(i);
else
stable_system_indices.push_back(i);
}
// std::cerr << "# Writing stable system ids\n";
if(cfg.count("stable_init_output"))
{
ofstream stable_init_output( cfg.optional("stable_init_output", string("stable_init_output.txt")).c_str() );
print_selected_systems(ens_init,stable_system_indices, stable_init_output);
}
if(cfg.count("stable_final_output"))
{
ofstream stable_final_output( cfg.optional("stable_final_output", string("stable_final_output.txt")).c_str() );
print_selected_systems(ens,stable_system_indices, stable_final_output);
}
if(cfg.count("unstable_init_output"))
{
ofstream unstable_init_output( cfg.optional("unstable_init_output", string("unstable_init_output.txt")).c_str() );
print_selected_systems(ens_init,unstable_system_indices, unstable_init_output);
}
if(cfg.count("unstable_final_output"))
{
ofstream unstable_final_output( cfg.optional("unstable_final_output", string("unstable_final_output.txt")).c_str() );
print_selected_systems(ens,unstable_system_indices, unstable_final_output);
}
}
Pwriter writer::create(const config& cfg)
{
Pwriter w;
std::string name = cfg.optional(std::string("log_writer") , std::string("null") );
std::string plugin_name = "writer_" + name;
try {
w.reset( (writer*) (plugin::instance(plugin_name,cfg)) );
}catch(plugin_not_found& e){
ERROR("Log writer " + name + " not found.");
}
return w;
}
void generate_initial_conditions_for_system(const config& cfg, defaultEnsemble &ens, const int sysidx, const int sysid)
{
double time_init = cfg.optional("time_init", 0.0);
const bool use_jacobi = cfg.optional("use_jacobi", 0);
bool keplerian_ephemeris = cfg.optional("use_keplerian", 1);
bool transit_ephemeris = cfg.optional("use_transit", 0);
if(transit_ephemeris) keplerian_ephemeris = 0;
assert(!(keplerian_ephemeris && transit_ephemeris)); // find a better way
ens[sysidx].id() = sysid;
ens[sysidx].time() = time_init;
ens[sysidx].set_active();
if(sysid>maxsysid) maxsysid = sysid;
// set sun to unit mass and at origin
double mass_star = draw_value_from_config(cfg,"mass_star",0.00003,100.);
double x=0, y=0, z=0, vx=0, vy=0, vz=0;
ens.set_body(sysidx, 0, mass_star, x, y, z, vx, vy, vz);
// If omitted or value of zero, then default to cycling through body id to make eccentric
int ecc_body = cfg.optional("ecc_body", 0);
if(ecc_body==0)
{ ecc_body = 1+(sysid*(ens.nbod()-1))/ens.nsys(); }
double mass_enclosed = mass_star;
for(unsigned int bod=1;bod<ens.nbod();++bod)
{
double mass_planet = draw_value_from_config(cfg,"mass",bod,0.,mass_star);
mass_enclosed += mass_planet;
double a, e, i, O, w, M;
if(transit_ephemeris)
{
double period = draw_value_from_config(cfg,"period",bod,0.2,365250.);
double epoch = draw_value_from_config(cfg,"epoch",bod,0.2,365250.);
a = pow((period/365.25)*(period/365.25)*mass_enclosed,1.0/3.0);
if(bod==ecc_body)
e = draw_value_from_config(cfg,"ecc",bod,0.,1.);
else
e = 0.;
i = draw_value_from_config(cfg,"inc",bod,-180.,180.);
O = draw_value_from_config(cfg,"node",bod,-720.,720.);
w = draw_value_from_config(cfg,"omega",bod,-720.,720.);
i *= M_PI/180.;
O *= M_PI/180.;
w *= M_PI/180.;
double T = (0.5*M_PI-w)+2.0*M_PI*((epoch/period)-floor(epoch/period));
double E = atan2(sqrt(1.-e)*(1.+e)*sin(T),e+cos(T));
M = E-e*sin(E);
}
else if (keplerian_ephemeris)
{
a = draw_value_from_config(cfg,"a",bod,0.001,10000.);
if(bod==ecc_body)
e = draw_value_from_config(cfg,"ecc",bod,0.,1.);
else
e = 0.;
i = draw_value_from_config(cfg,"inc",bod,-180.,180.);
O = draw_value_from_config(cfg,"node",bod,-720.,720.);
w = draw_value_from_config(cfg,"omega",bod,-720.,720.);
M = draw_value_from_config(cfg,"meananom",bod,-720.,720.);
i *= M_PI/180.;
O *= M_PI/180.;
w *= M_PI/180.;
M *= M_PI/180.;
}
double mass = use_jacobi ? mass_enclosed : mass_star+mass_planet;
if(cfg.count("verbose")&&(sysid<10))
std::cout << "# Drawing sysid= " << sysid << " bod= " << bod << ' ' << mass_planet << " " << a << ' ' << e << ' ' << i*180./M_PI << ' ' << O*180./M_PI << ' ' << w*180./M_PI << ' ' << M*180./M_PI << '\n';
calc_cartesian_for_ellipse(x,y,z,vx,vy,vz, a, e, i, O, w, M, mass);
// printf("%d %d: %lg (%lg %lg %lg) (%lg %lg %lg) \n", sysidx, bod, mass_planet, x,y,z,vx,vy,vz);
if(use_jacobi)
{
double bx, by, bz, bvx, bvy, bvz;
ens.get_barycenter(sysidx,bx,by,bz,bvx,bvy,bvz,bod-1);
x += bx; y += by; z += bz;
vx += bvx; vy += bvy; vz += bvz;
}
// assign body a mass, position and velocity
ens.set_body(sysidx, bod, mass_planet, x, y, z, vx, vy, vz);
if(cfg.count("verbose")&&(sysid<10))
{
double x_t = ens.x(sysidx,bod);
double y_t = ens.y(sysidx,bod);
double z_t = ens.z(sysidx,bod);
double vx_t = ens.vx(sysidx,bod);
double vy_t = ens.vy(sysidx,bod);
double vz_t = ens.vz(sysidx,bod);
std::cout << " x= " << x << "=" << x_t << " ";
std::cout << " y= " << y << "=" << y_t << " ";
std::cout << " z= " << z << "=" << z_t << " ";
std::cout << "vx= " << vx << "=" << vx_t << " ";
std::cout << "vy= " << vy << "=" << vy_t << " ";
std::cout << "vz= " << vz << "=" << vz_t << "\n";
}
} // end loop over bodies
// Shift into barycentric frame
ens.get_barycenter(sysidx,x,y,z,vx,vy,vz);
for(unsigned int bod=0;bod<ens.nbod();++bod)
{
ens.set_body(sysidx, bod, ens.mass(sysidx,bod),
ens.x(sysidx,bod)-x, ens.y(sysidx,bod)-y, ens.z(sysidx,bod)-z,
ens.vx(sysidx,bod)-vx, ens.vy(sysidx,bod)-vy, ens.vz(sysidx,bod)-vz);
} // end loop over bodies
}
void print_system(const swarm::ensemble& ens, const int systemid, std::ostream &os = std::cout)
{
enum {
JACOBI, BARYCENTRIC, ASTROCENTRIC
} COORDINATE_SYSTEM = BARYCENTRIC;
const bool use_jacobi = cfg.optional("use_jacobi", 0);
if(use_jacobi) COORDINATE_SYSTEM = JACOBI;
std::streamsize cout_precision_old = os.precision();
os.precision(10);
os << "sys_idx= " << systemid << " sys_id= " << ens[systemid].id() << " time= " << ens.time(systemid) << "\n";
double star_mass = ens.mass(systemid,0);
double mass_effective = star_mass;
double bx, by, bz, bvx, bvy, bvz;
switch(COORDINATE_SYSTEM)
{
case JACOBI:
ens.get_barycenter(systemid,bx,by,bz,bvx,bvy,bvz,0);
break;
case BARYCENTRIC:
ens.get_barycenter(systemid,bx,by,bz,bvx,bvy,bvz);
break;
case ASTROCENTRIC:
ens.get_body(systemid,0,star_mass,bx,by,bz,bvx,bvy,bvz);
break;
}
for(unsigned int bod=1;bod<ens.nbod();++bod) // Skip star since printing orbits
{
// std::cout << "pos= (" << ens.x(systemid, bod) << ", " << ens.y(systemid, bod) << ", " << ens.z(systemid, bod) << ") vel= (" << ens.vx(systemid, bod) << ", " << ens.vy(systemid, bod) << ", " << ens.vz(systemid, bod) << ").\n";
double mass = ens.mass(systemid,bod);
switch(COORDINATE_SYSTEM)
{
case JACOBI:
ens.get_barycenter(systemid,bx,by,bz,bvx,bvy,bvz,bod-1);
mass_effective += mass;
break;
case BARYCENTRIC:
mass_effective = star_mass + mass;
break;
case ASTROCENTRIC:
mass_effective = star_mass + mass;
break;
}
double x = ens.x(systemid,bod)-bx;
double y = ens.y(systemid,bod)-by;
double z = ens.z(systemid,bod)-bz;
double vx = ens.vx(systemid,bod)-bvx;
double vy = ens.vy(systemid,bod)-bvy;
double vz = ens.vz(systemid,bod)-bvz;
double a, e, i, O, w, M;
calc_keplerian_for_cartesian(a,e,i,O,w,M, x,y,z,vx,vy,vz, mass_effective);
i *= 180/M_PI;
O *= 180/M_PI;
w *= 180/M_PI;
M *= 180/M_PI;
// os << " b= " << bod << " m= " << mass << " a= " << a << " e= " << e << " i= " << i << " Omega= " << O << " omega= " << w << " M= " << M << "\n";
os << ens[systemid].id() << " " << bod << " " << mass << " " << a << " " << e << " " << i << " " << O << " " << w << " " << M << "\n";
}
os.precision(cout_precision_old);
os << std::flush;
}
int main(int argc, char* argv[]){
// Command line and Config file
parse_commandline_and_config(argc,argv);
// outputConfigSummary(std::cout,cfg);
base_cfg = cfg;
command = argvars_map["command"].as< string >();
// Set some variables
pos_threshold = cfg.optional("pos_threshold", 1e-10);
vel_threshold = cfg.optional("vel_threshold", 1e-10);
time_threshold = cfg.optional("time_threshold", 1e-10);
// Branch based on COMMAND
if(command == "integrate"){
init_cuda();
run_integration();
}else if(command == "test-cpu"){
// init_cuda(); // removed so CPU tests would work, but then broke GPU tests when needed to set cuda device
output_test();
}else if(command == "test"){
init_cuda();
output_test();
}else if(command == "benchmark" || command == "verify") {
init_cuda();
if(command == "verify")
verify_mode = true;
if(argvars_map.count("range") > 0) {
parameter_range pr = argvars_map["range"].as<parameter_range>();
benchmark(pr);
}else
cerr << "A parameter-value range is missing" << endl;
if(command == "verify") {
cout << (verification_results ? "Verify success" : "Verify failed") << endl;
return verification_results ? 0 : 1;
}
}
else if(command == "query" ) {
if (!argvars_map.count("logfile")) { cerr << "Name of input log file is missing \n"; return 1; }
time_range_t T;
sys_range_t sys, body_range;
if (argvars_map.count("time")) { T = argvars_map["time"].as<time_range_t>(); }
if (argvars_map.count("system")) { sys = argvars_map["system"].as<sys_range_t>(); }
if (argvars_map.count("body")) { body_range = argvars_map["body"].as<sys_range_t>(); }
if (argvars_map.count("keplerian")) { query::set_keplerian_output(); }
if (argvars_map.count("origin")) { query::set_coordinate_system(query::origin); }
if (argvars_map.count("astrocentric")) { query::set_coordinate_system(query::astrocentric); }
if (argvars_map.count("barycentric")) { query::set_coordinate_system(query::barycentric); }
if (argvars_map.count("jacobi")) { query::set_coordinate_system(query::jacobi); }
std::cout.flush();
cerr << "# Systems: " << sys << " Bodies: " << body_range << " Times: " << T << endl;
if (argvars_map.count("keplerian"))
{ std::cerr << "# Output in Keplerian coordinates "; }
else { std::cerr << "# Output in Cartesian coordinates "; }
#if 0
switch(query::planets_coordinate_system)
{
case astrocentric:
std::cerr << "(astrocentric)";
break;
case barycentric:
std::cerr << "(barycentric)";
break;
case jacobi:
std::cerr << "(jacobi)";
break;
case origin:
std::cerr << "(origin)";
break;
}
#endif
std::cerr << "\n";
std::string datafile(argvars_map["logfile"].as<std::string>());
query::execute(datafile, T, sys, body_range);
}
else if(command == "generate" ) {
srand(time(NULL));
INFO_OUTPUT(1, "Generating new ensemble: " << cfg["nsys"] << ", " << cfg["nbod"] << endl);
current_ens = generate_ensemble(cfg);
save_ensemble();
}
else if(command == "convert" ) {
if( read_input_file(current_ens,cfg) && save_ensemble() ) {
INFO_OUTPUT(1,"Converted!");
}else{
INFO_OUTPUT(1,"Convertion failed");
exit(1);
}
}
else
std::cerr << "Valid commands are: integrate, benchmark, verify, test, test-cpu, query, generate " << std::endl;
return 0;
}
stop_on_collision_param(const config &cfg)
{
dmin_squared = cfg.optional("collision_radius",0.);
dmin_squared *= dmin_squared;
}
/**
* Read in Keplerian coordinates from a text file
*
*/
defaultEnsemble generate_ensemble_with_initial_conditions_keplerian_from_file(const config& cfg)
{
defaultEnsemble ens = defaultEnsemble::create( cfg.require("nbod",0), cfg.require("nsys",0) );
std::cerr << "# nsystems = " << ens.nsys() << " nbodies/system = " << ens.nbod() << "\n";
// std::cerr << "# Set initial time for all systems = ";
double time_init = cfg.optional("time_init", 0.0);
// std::cerr << time_init << ".\n";
const bool use_jacobi = cfg.optional("use_jacobi", 0);
// std::cerr << "# Writing stable system ids\n";
ifstream jacobi_input( cfg.optional("input_mcmc_keplerian", string("mcmc.out")).c_str() );
for(unsigned int sysid=0;sysid<ens.nsys();++sysid)
{
assert(jacobi_input.good());
string id;
double mass_star;
jacobi_input >> id >> mass_star;
ens[sysid].id() = sysid;
ens[sysid].time() = time_init;
ens[sysid].set_active();
double x=0, y=0, z=0, vx=0, vy=0, vz=0;
ens.set_body(sysid, 0, mass_star, x, y, z, vx, vy, vz);
double mass_enclosed = mass_star;
for(unsigned int bod=1;bod<ens.nbod();++bod)
{
double mass_planet, a, e, i, O, w, M;
jacobi_input >> mass_planet >> a >> e >> i >> w >> O >> M;
// a = pow((period/365.25)*(period/365.25)*mass_enclosed,1.0/3.0);
i *= M_PI/180.;
O *= M_PI/180.;
w *= M_PI/180.;
M *= M_PI/180.;
mass_enclosed += mass_planet;
double mass = use_jacobi ? mass_enclosed : mass_star+mass_planet;
if(cfg.count("verbose")&&(sysid<10))
std::cout << "# Drawing sysid= " << sysid << " bod= " << bod << ' ' << mass_planet << " " << a << ' ' << e << ' ' << i*180./M_PI << ' ' << O*180./M_PI << ' ' << w*180./M_PI << ' ' << M*180./M_PI << '\n';
calc_cartesian_for_ellipse(x,y,z,vx,vy,vz, a, e, i, O, w, M, mass);
// printf("%d %d: %lg (%lg %lg %lg) (%lg %lg %lg) \n", sysid, bod, mass_planet, x,y,z,vx,vy,vz);
if(use_jacobi)
{
double bx, by, bz, bvx, bvy, bvz;
ens.get_barycenter(sysid,bx,by,bz,bvx,bvy,bvz,bod-1);
x += bx; y += by; z += bz;
vx += bvx; vy += bvy; vz += bvz;
}
// assign body a mass, position and velocity
ens.set_body(sysid, bod, mass_planet, x, y, z, vx, vy, vz);
if(cfg.count("verbose")&&(sysid<10))
{
double x_t = ens.x(sysid,bod);
double y_t = ens.y(sysid,bod);
double z_t = ens.z(sysid,bod);
double vx_t = ens.vx(sysid,bod);
double vy_t = ens.vy(sysid,bod);
double vz_t = ens.vz(sysid,bod);
std::cout << " x= " << x << "=" << x_t << " ";
std::cout << " y= " << y << "=" << y_t << " ";
std::cout << " z= " << z << "=" << z_t << " ";
std::cout << "vx= " << vx << "=" << vx_t << " ";
std::cout << "vy= " << vy << "=" << vy_t << " ";
std::cout << "vz= " << vz << "=" << vz_t << "\n";
}
} // end loop over bodies
// Shift into barycentric frame
ens.get_barycenter(sysid,x,y,z,vx,vy,vz);
for(unsigned int bod=0;bod<ens.nbod();++bod)
{
ens.set_body(sysid, bod, ens.mass(sysid,bod),
ens.x(sysid,bod)-x, ens.y(sysid,bod)-y, ens.z(sysid,bod)-z,
ens.vx(sysid,bod)-vx, ens.vy(sysid,bod)-vy, ens.vz(sysid,bod)-vz);
} // end loop over bodies
} // end loop over systems
return ens;
}
/**
* Read in Cartesian coordinates from a text file
*
*/
defaultEnsemble generate_ensemble_with_initial_conditions_cartesian_from_file(const config& cfg)
{
defaultEnsemble ens = defaultEnsemble::create( cfg.require("nbod",0), cfg.require("nsys",0) );
std::cerr << "# nsystems = " << ens.nsys() << " nbodies/system = " << ens.nbod() << "\n";
// std::cerr << "# Set initial time for all systems = ";
double time_init = cfg.optional("time_init", 0.0);
// std::cerr << time_init << ".\n";
const bool use_jacobi = cfg.optional("use_jacobi", 0);
// std::cerr << "# Writing stable system ids\n";
ifstream mcmc_input( cfg.optional("input_mcmc_cartesian", string("mcmc.out")).c_str() );
assert(mcmc_input.good());
const int lines_to_skip = cfg.optional("lines_to_skip", 0);
for(int i=0;i<lines_to_skip;++i)
{
assert(mcmc_input.good());
char junk[1024];
mcmc_input.getline(junk,1024);
}
for(unsigned int sysid=0;sysid<ens.nsys();++sysid)
{
assert(mcmc_input.good());
#if 1
std::vector<double> masses(ens.nbod(),0.0);
for(unsigned int bod=0;bod<ens.nbod();++bod)
{
mcmc_input >> masses[bod];
} // end loop over bodies
ens[sysid].id() = sysid;
ens[sysid].time() = time_init;
ens[sysid].set_active();
double x=0, y=0, z=0, vx=0, vy=0, vz=0;
ens.set_body(sysid, 0, masses[0], x, y, z, vx, vy, vz);
double mass_enclosed = masses[0];
for(unsigned int bod=1;bod<ens.nbod();++bod)
{
mcmc_input >> x >> y >> z >> vx >> vy >> vz;
mass_enclosed += masses[bod];
double mass = use_jacobi ? mass_enclosed : masses[0]+masses[bod];
if(cfg.count("verbose")&&(sysid<10))
std::cout << "# Drawing sysid= " << sysid << " bod= " << bod << ' ' << masses[bod] << " " << x << ' ' << y << ' ' << z << ' ' << vx << ' ' << vy << ' ' << vz << '\n';
if(use_jacobi)
{
double bx, by, bz, bvx, bvy, bvz;
ens.get_barycenter(sysid,bx,by,bz,bvx,bvy,bvz,bod-1);
x += bx; y += by; z += bz;
vx += bvx; vy += bvy; vz += bvz;
}
// assign body a mass, position and velocity
ens.set_body(sysid, bod, masses[bod], x, y, z, vx, vy, vz);
if(cfg.count("verbose")&&(sysid<10))
{
double x_t = ens.x(sysid,bod);
double y_t = ens.y(sysid,bod);
double z_t = ens.z(sysid,bod);
double vx_t = ens.vx(sysid,bod);
double vy_t = ens.vy(sysid,bod);
double vz_t = ens.vz(sysid,bod);
std::cout << " x= " << x << "=" << x_t << " ";
std::cout << " y= " << y << "=" << y_t << " ";
std::cout << " z= " << z << "=" << z_t << " ";
std::cout << "vx= " << vx << "=" << vx_t << " ";
std::cout << "vy= " << vy << "=" << vy_t << " ";
std::cout << "vz= " << vz << "=" << vz_t << "\n";
}
#else
std::vector<double> masses(ens.nbod(),0.0);
double x=0, y=0, z=0, vx=0, vy=0, vz=0;
double mass_enclosed = 0.0;
ens[sysid].id() = sysid;
ens[sysid].time() = time_init;
ens[sysid].set_active();
for(unsigned int bod=0;bod<ens.nbod();++bod)
{
mcmc_input >> masses[bod];
mcmc_input >> x >> y >> z >> vx >> vy >> vz;
mass_enclosed += masses[bod];
double mass = use_jacobi ? mass_enclosed : masses[0]+masses[bod];
if(cfg.count("verbose")&&(sysid<10))
std::cout << "# Drawing sysid= " << sysid << " bod= " << bod << ' ' << masses[bod] << " " << x << ' ' << y << ' ' << z << ' ' << vx << ' ' << vy << ' ' << vz << '\n';
if(use_jacobi)
{
double bx, by, bz, bvx, bvy, bvz;
ens.get_barycenter(sysid,bx,by,bz,bvx,bvy,bvz,bod-1);
x += bx; y += by; z += bz;
vx += bvx; vy += bvy; vz += bvz;
}
// assign body a mass, position and velocity
ens.set_body(sysid, bod, masses[bod], x, y, z, vx, vy, vz);
if(cfg.count("verbose")&&(sysid<10))
{
double x_t = ens.x(sysid,bod);
double y_t = ens.y(sysid,bod);
double z_t = ens.z(sysid,bod);
double vx_t = ens.vx(sysid,bod);
double vy_t = ens.vy(sysid,bod);
double vz_t = ens.vz(sysid,bod);
std::cout << " x= " << x << "=" << x_t << " ";
std::cout << " y= " << y << "=" << y_t << " ";
std::cout << " z= " << z << "=" << z_t << " ";
std::cout << "vx= " << vx << "=" << vx_t << " ";
std::cout << "vy= " << vy << "=" << vy_t << " ";
std::cout << "vz= " << vz << "=" << vz_t << "\n";
}
#endif
} // end loop over bodies
// Shift into barycentric frame
ens.get_barycenter(sysid,x,y,z,vx,vy,vz);
for(unsigned int bod=0;bod<ens.nbod();++bod)
{
ens.set_body(sysid, bod, ens.mass(sysid,bod),
ens.x(sysid,bod)-x, ens.y(sysid,bod)-y, ens.z(sysid,bod)-z,
ens.vx(sysid,bod)-vx, ens.vy(sysid,bod)-vy, ens.vz(sysid,bod)-vz);
} // end loop over bodies
} // end loop over systems
return ens;
}
void print_system(const swarm::ensemble& ens, const int systemid, std::ostream &os = std::cout)
{
enum {
JACOBI, BARYCENTRIC, ASTROCENTRIC
} COORDINATE_SYSTEM = BARYCENTRIC;
const bool use_jacobi = cfg.optional("use_jacobi_output", 0);
if(use_jacobi) COORDINATE_SYSTEM = JACOBI;
std::streamsize cout_precision_old = os.precision();
os.precision(10);
os << "sys_idx= " << systemid << " sys_id= " << ens[systemid].id() << " time= " << ens.time(systemid) << "\n";
double star_mass = ens.mass(systemid,0);
double mass_effective = star_mass;
double bx, by, bz, bvx, bvy, bvz;
switch(COORDINATE_SYSTEM)
{
case JACOBI:
ens.get_barycenter(systemid,bx,by,bz,bvx,bvy,bvz,0);
break;
case BARYCENTRIC:
ens.get_barycenter(systemid,bx,by,bz,bvx,bvy,bvz);
break;
case ASTROCENTRIC:
ens.get_body(systemid,0,star_mass,bx,by,bz,bvx,bvy,bvz);
break;
}
for(unsigned int bod=1;bod<ens.nbod();++bod) // Skip star since printing orbits
{
// std::cout << "pos= (" << ens.x(systemid, bod) << ", " << ens.y(systemid, bod) << ", " << ens.z(systemid, bod) << ") vel= (" << ens.vx(systemid, bod) << ", " << ens.vy(systemid, bod) << ", " << ens.vz(systemid, bod) << ").\n";
double mass = ens.mass(systemid,bod);
switch(COORDINATE_SYSTEM)
{
case JACOBI:
ens.get_barycenter(systemid,bx,by,bz,bvx,bvy,bvz,bod-1);
mass_effective += mass;
break;
case BARYCENTRIC:
mass_effective = star_mass + mass;
break;
case ASTROCENTRIC:
mass_effective = star_mass + mass;
break;
}
double x = ens.x(systemid,bod)-bx;
double y = ens.y(systemid,bod)-by;
double z = ens.z(systemid,bod)-bz;
double vx = ens.vx(systemid,bod)-bvx;
double vy = ens.vy(systemid,bod)-bvy;
double vz = ens.vz(systemid,bod)-bvz;
double a, e, i, O, w, M;
calc_keplerian_for_cartesian(a,e,i,O,w,M, x,y,z,vx,vy,vz, mass_effective);
i *= 180/M_PI;
O *= 180/M_PI;
w *= 180/M_PI;
M *= 180/M_PI;
// os << " b= " << bod << " m= " << mass << " a= " << a << " e= " << e << " i= " << i << " Omega= " << O << " omega= " << w << " M= " << M << "\n";
os << ens[systemid].id() << " " << bod << " " << mass << " " << a << " " << e << " " << i << " " << O << " " << w << " " << M << "\n";
}
os.precision(cout_precision_old);
os << std::flush;
}
void print_selected_systems(swarm::ensemble& ens, std::vector<unsigned int> systemindices, std::ostream &os = std::cout)
{
for(unsigned int i=0; i<systemindices.size(); ++i)
print_system(ens,systemindices[i], os);
}
void print_selected_systems_for_demo(swarm::ensemble& ens, unsigned int nprint, std::ostream &os = std::cout)
{
if(nprint>ens.nsys()) nprint = ens.nsys();
for(unsigned int systemid = 0; systemid< nprint; ++systemid)
print_system(ens,systemid,os);
}
void write_stable_systems(defaultEnsemble &ens, defaultEnsemble &ens_init)
{
// find the stable ones and output the initial conditions for the stable
// ones in keplerian coordinates
// std::cerr << "# Finding stable system ids\n";
std::vector<unsigned int> stable_system_indices, unstable_system_indices;
for(int i = 0; i < ens.nsys() ; i++ )
{
if(ens[i].is_disabled())
unstable_system_indices.push_back(i);
else
stable_system_indices.push_back(i);
}
// std::cerr << "# Writing stable system ids\n";
if(cfg.count("stable_init_output"))
{
ofstream stable_init_output( cfg.optional("stable_init_output", string("stable_init_output.txt")).c_str() );
print_selected_systems(ens_init,stable_system_indices, stable_init_output);
}
if(cfg.count("stable_final_output"))
{
ofstream stable_final_output( cfg.optional("stable_final_output", string("stable_final_output.txt")).c_str() );
print_selected_systems(ens,stable_system_indices, stable_final_output);
}
if(cfg.count("unstable_init_output"))
{
ofstream unstable_init_output( cfg.optional("unstable_init_output", string("unstable_init_output.txt")).c_str() );
print_selected_systems(ens_init,unstable_system_indices, unstable_init_output);
}
if(cfg.count("unstable_final_output"))
{
ofstream unstable_final_output( cfg.optional("unstable_final_output", string("unstable_final_output.txt")).c_str() );
print_selected_systems(ens,unstable_system_indices, unstable_final_output);
}
}
stop_on_ejection_params(const config &cfg)
{
rmax = cfg.optional("rmax",std::numeric_limits<float>::max());
}
int main(int argc, char* argv[] )
{
// We keep it simple, later on one can use boost::program_options to
// have more options
// but now we only use two configuration files. It is because the
// initial conditions configuration file can get really big and
// it has very little to do with other configuration options.
if(argc < 3) cout << "Usage: montecarlo_ecclimit <integration configuration> <initial conditions configuration>" << endl;
// First one is the configuration for integration
string integ_configfile = argv[1];
// the second one is the configuration for generating
// initial conditions it is used by \ref generate_ensemble_with_randomized_initial_conditions
string initc_configfile = argv[2];
cfg = config::load(integ_configfile);
// 1.read keplerian coordinates from a file
// 2.generate guesses based on the keplerian coordinates
// 3.convert keplerian coordinates to an ensemble
// The following line that is taken from swarm_tutorial_montecarlo.cpp
// does the first three steps. Its pretty amazing.
defaultEnsemble ens ;
if( cfg.count("input") )
{ ens = snapshot::load(cfg["input"]); }
else
{ ens = generate_ensemble_with_randomized_initial_conditions( config::load(initc_configfile) ); }
// save the ensemble as a snapshot
if(cfg.count("initial_snapshot"))
{ snapshot::save( ens, cfg["initial_snapshot"] ); }
defaultEnsemble ens_init = ens.clone() ;
std::vector<std::vector<double> > semimajor_axes_init = calc_semimajor_axes(ens);
// We want to find the ones that are really stable, so we integrate for
// a really long time and over time we get rid of unstable ones.
double destination_time = cfg.optional("destination_time", 1.0E6);
swarm::init(cfg);
Pintegrator integ = integrator::create(cfg);
integ->set_ensemble(ens);
integ->set_destination_time ( destination_time );
// We can set the following two items if we really need
// longer integrations before we stop for checking the
// ensemble and saving snapshots.
// one kernel call to allow for prompt CPU pruning of unstable systems
int max_kernel_calls_per_integrate = cfg.optional("max_kernel_calls_per_integrate",1);
// 10^2 inner orbits at 200 time steps per inner orbit
int max_itterations_per_kernel_call = cfg.optional("max_itterations_per_kernel_call",20000);
integ->set_max_attempts( max_kernel_calls_per_integrate );
integ->set_max_iterations ( max_itterations_per_kernel_call );
SYNC;
// integrate ensemble
// - drop the unstable ones as you go
// - redistribute the systems for better efficiency
// - save the results periodically
// This can be an infitie loop. but we can always get out of this
// the best way to do it is to use Ctrl-C. Further wecan
// define Ctrl-C signal handler to get out
// of this loop in a safe way. But we really want this loop
// to run for a long time
reactivate_systems(ens);
// EBF Experiment trying to expose host log.
swarm::log::ensemble(*(swarm::log::manager::default_log()->get_hostlog()),ens);
integ->flush_log();
catch_ctrl_c();
while( number_of_active_systems(ens) > 0 && integration_loop_not_aborted_yet ) {
// 1. Integrate, we could use core_integrate but the general integrate
// saves all the headache. We should only use core_integrate if we are
// going to do everything on GPU, but since we are saving a snapshot in
// the middle, there's no point. It also has a nice for loop and can
// to several kernel calls.
integ->integrate();
// 2. CPU-based tests to identify systems that can be terminated
int active_ones = number_of_active_systems(ens);
const double deltaa_frac_threshold = cfg.optional("deltaa_frac_threshold", 0.5);
disable_unstable_systems( ens, semimajor_axes_init, deltaa_frac_threshold );
// double med_deltaE = find_median_energy_conservation_error(ens, ens_init );
double max_deltaE = find_max_energy_conservation_error(ens, ens_init );
std::cerr << "# Time: " << ens.time_ranges().min << " " << ens.time_ranges().median << " " << ens.time_ranges().max << " Systems: " << ens.nsys() << ", " << active_ones << ", ";
active_ones = number_of_active_systems(ens);
std::cerr << active_ones << " max|dE/E|= " << max_deltaE << "\n";
// EBF Experiment trying to expose host log.
swarm::log::ensemble_enabled(*(swarm::log::manager::default_log()->get_hostlog()),ens);
integ->flush_log();
if (!cfg.count("input") && cfg.count("replace_unstable") )
{
int nsys_to_replace = number_of_disabled_systems( ens ) ;
if( nsys_to_replace >0 )
{
replace_disabled_systems( ens );
integ->set_ensemble( ens );
}
}
else
{
// 3. Now we need to get rid of the inactive ones. There
// should be some criteria, whatever it is we are
// going to put it in a function and call it \ref needs_shrinking
if ( needs_shrinking( ens ) )
{
// Now this function will take care of trimming for us
// We need to create a new ensemble of a smaller size
// thats why we need to call set_ensemble again. because
// the GPU ensemble should get recreated for us.
// we need better memory management to safely allow
// the following statement. Right now we don't have a
// very good automatic memory management
// std::cerr << "# Removing disabled systems\n";
ens = trim_disabled_systems( ens );
// std::cerr << "# Testing if ens has any systems left.\n";
if(ens.nsys()>0)
{
// std::cerr << "# Setting ensemble for integrator\n";
// WARNING: This appears to be the cause of SEGFAULT
// if the ensemble is empty.
integ->set_ensemble( ens );
}
// std::cerr << "# Time: " << ens.time_ranges() << " Total Systems: " << ens.nsys() << " Active Systems: " << active_ones << ", ";
// active_ones = number_of_active_systems(ens);
// std::cerr << active_ones << "\n";
}
}
// std::cerr << std::endl;
// 4. We need to save a snapshot in case system crashes or someone
// gets tired of it and hits Ctrl-C
// std::cerr << "# Saving snapshot\n";
save_snapshot( ens );
write_stable_systems(ens,ens_init);
}
// Now we are at the end of the system, before we examine
// the output we need to
// std::cerr << "# Removing disabled systems\n";
if(number_of_active_systems(ens)>0)
{
ens = trim_disabled_systems( ens );
// std::cerr << "# Saving snapshot\n";
save_snapshot( ens );
}
write_stable_systems(ens,ens_init);
}
stop_on_all_but_two_at_large_distance_params(const config &cfg)
{
double rmax = cfg.optional("rmax",std::numeric_limits<float>::max());
}
stop_on_any_large_distance_params(const config &cfg)
{
rmax = cfg.optional("rmax",std::numeric_limits<float>::max());
stop = cfg.optional("stop_on_rmax",false);
}