/** First, we test whether body b is far from the origin
* (which may be COM or star) and moving farther away.
* If both of those are passed, then we check that the
* orbit is parabolic or hyperbolic.
*
*/
GPUAPI bool test_body(const int& b) {
double x,y,z,vx,vy,vz; _sys[b].get(x,y,z,vx,vy,vz);
// double r = sqrt(_sys[b].radius_squared()); // WARNING: Deceiving function name
double r = _sys[b].radius(); // WARNING: Deceiving function name
if( r < _params.rmax ) return false;
double rdotv = x*vx+y*vy+z*vz;
if( rdotv <= 0. ) return false;
bool stopit = false;
double speed_sq = _sys[b].speed_squared(); // WARNING: Deceiving function name
double epp = 0.5*speed_sq*r/_sys[b].mass()-1.;
if( fabs(epp) < 1e-4 ) {
double energy = 0.5*speed_sq-_sys[b].mass()/r;
if(is_verbose_on() )
lprintf(_log, "Orbit is nearly parabolic: _sys=%d, bod=%d, T=%lg r=%lg energy=%lg energy*r/GM=%lg.\n"
, _sys.number(), b, _sys.time() , r, energy, epp );
stopit = true;
}else if ( epp > 0 ){
double energy = 0.5*speed_sq-_sys[b].mass()/r;
if(is_verbose_on() )
lprintf(_log, "Orbit is hyperbolic: _sys=%d, bod=%d, T=%lg r=%lg energy=%lg energy*r/GM=%lg.\n"
, _sys.number(), b, _sys.time() , r, energy, epp );
// TODO: Make sure that planet is not near another body
// This is very unlikely to be an issue, provided that rmax
// is set to be well beyond the initial semi-major axes
stopit = true;
}
return stopit;
}
GPUAPI int pass_two (int thread_in_system)
{
int new_state = _sys.state();
if(is_any_on() && need_full_test) // implies thread_in_system==0
{
// Check for distance from other bodies
int num_body_far_from_all = 0;
for(int b = 0 ; b < _sys.nbod(); b ++ )
{
if(_sys.radius_squared(b) <= _params.rmax*_params.rmax ) continue; // WARNING: Confusing function name
bool is_far_from_every_body = true;
for(int bb = 0 ; bb < _sys.nbod(); bb ++ ){
if(b == bb) continue;
if(_sys.distance_squared_between(b,bb) < _params.rmax*_params.rmax )
{ is_far_from_every_body = false; break; }
}
if(is_far_from_every_body)
{ num_body_far_from_all++; }
}
if(num_body_far_from_all+2>=_sys.nbod())
{
condition_met = true;
if(is_verbose_on())
lprintf(_log, "No more than two bodies are within rmax of other bodies: _sys=%d, bod1=%d, bod2=%d, T=%lg r=%lg rmax=%lg.\n"
, _sys.number(), id1, id2, _sys.time() , r, _params.rmax);
if(is_deactivate_on() && (_sys.state()>=0) )
{ _sys.set_disabled(); new_state = _sys.state(); }
}
}
return new_state;
}
// GPUAPI void operator () () {
GPUAPI void operator () (int thread_in_system) {
if(!is_any_on()) return;
if(thread_in_system==0)
{
// Check for distance from origin
int num_body_near_origin = 0, id1 = -1, id2 = -2;
for(int b = 0 ; b < _sys.nbod(); b ++ ){
if(_sys.radius_squared(b) <= _params.rmax*_params.rmax ) // WARNING: Confusing function name
{
if(num_body_near_origin==0) id1 = b;
if(num_body_near_origin==1) id2 = b;
num_body_near_origin++;
}
}
if( num_body_near_origin > 2 )
return;
// Check for distance from other bodies
int num_body_far_from_all = 0;
for(int b = 0 ; b < _sys.nbod(); b ++ ){
if(_sys.radius_squared(b) <= _params.rmax*_params.rmax ) continue; // WARNING: Confusing function name
bool is_far_from_every_body = true;
for(int bb = 0 ; bb < _sys.nbod(); bb ++ ){
if(b == bb) continue;
if(_sys.distance_squared_between(b,bb) < _params.rmax*_params.rmax )
{ is_far_from_every_body = false; break; }
}
if(is_far_from_every_body)
{
num_body_far_from_all++;
}
}
if(num_body_far_from_all+2>=_sys.nbod())
{
if(is_verbose_on())
lprintf(_log, "No more than two bodies are within rmax of other bodies: _sys=%d, bod1=%d, bod2=%d, T=%lg r=%lg rmax=%lg.\n"
, _sys.number(), id1, id2, _sys.time() , r, _params.rmax);
if(is_log_on())
log::system(_log, _sys);
if(is_deactivate_on())
_sys.set_disabled();
}
}
}
GPUAPI bool pass_one (int thread_in_system)
{
need_full_test = false;
condition_met = false;
if(is_any_on()&&(thread_in_system==0))
{
bool is_any_body_far_from_origin = false;
for(int b = 0 ; b < _sys.nbod(); b ++ )
{
if(_sys.radius_squared(b) > _params.rmax * _params.rmax )
is_any_body_far_from_origin = true;
}
if(!is_any_body_far_from_origin) break;
bool need_to_log = false;
for(int b = 0 ; b < _sys.nbod(); b ++ )
{
if(_sys.radius_squared(b) >= _params.rmax * _params.rmax )
{
bool is_far_from_every_body = true;
for(int bb = 0 ; bb < _sys.nbod(); bb ++ )
if(b != bb)
{
double r2 = _sys.distance_squared_between(b,bb);
if(r2 < _params.rmax*_params.rmax )
is_far_from_every_body = false;
}
if(is_far_from_every_body)
{
condition_met = true;
if( is_log_on() )
need_full_test = true;
if(is_verbose_on() )
lprintf(_log, "Distance from all bodies exceeds rmax: _sys=%d, bod=%d, T=%lg r=%lg rmax=%lg.\n", _sys.number(), b, _sys.time() , sqrt(r2), _params.rmax);
}
} // if far from origin
} // for bodies
}
return need_full_test;
}
// GPUAPI void operator () () {
GPUAPI void operator () (int thread_in_system) {
if(!is_any_on()) return;
if(thread_in_system==0)
{
bool is_any_body_far_from_origin = false;
for(int b = 0 ; b < _sys.nbod(); b ++ ){
if(_sys.radius_squared(b) > _params.rmax * _params.rmax )
is_any_body_far_from_origin = true;
}
if(!is_any_body_far_from_origin) return;
bool need_to_log = false;
for(int b = 0 ; b < _sys.nbod(); b ++ ){
if(_sys.radius_squared(b) >= _params.rmax * _params.rmax ) {
bool is_far_from_every_body = true;
for(int bb = 0 ; bb < _sys.nbod(); bb ++ )
if(b != bb) {
double r2 = _sys.distance_squared_between(b,bb);
if(r2 < _params.rmax*_params.rmax )
is_far_from_every_body = false;
}
if(is_far_from_every_body) {
if(is_verbose_on() )
lprintf(_log, "Distance from all bodies exceeds rmax: _sys=%d, bod=%d, T=%lg r=%lg rmax=%lg.\n", _sys.number(), b, _sys.time() , sqrt(r2), _params.rmax);
if(is_log_on() )
need_to_log = true;
if(is_deactivate_on() )
a_sys.set_disabled();
}
}
}
if(need_to_log)
log::system(_log, _sys);
}
}
GPUAPI bool is_any_on() { return is_deactivate_on() || is_log_on() || is_verbose_on() ; }
