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extern crate csv;
pub use crate::celestia::*;
use crate::dimensions::allocator::Allocator;
use crate::dimensions::{DefaultAllocator, U6};
pub use crate::dynamics::orbital::{OrbitalDynamics, OrbitalDynamicsStm, OrbitalDynamicsT};
use crate::dynamics::spacecraft::{Spacecraft, SpacecraftState};
use crate::dynamics::sph_harmonics::{Harmonics, HarmonicsDiff};
pub use crate::dynamics::Dynamics;
use crate::io::formatter::*;
use crate::io::scenario::ScenarioSerde;
use crate::io::{parse_duration, ParsingError};
use crate::propagators::error_ctrl::RSSStepPV;
use crate::propagators::{PropOpts, Propagator};
use crate::time::{Epoch, SECONDS_PER_DAY};
use std::str::FromStr;
use std::sync::mpsc::channel;
use std::time::Instant;
pub enum StmState<N, M> {
Without(N),
With(M),
Unknown,
}
impl<N, M> StmState<N, M> {
pub fn with(&self) -> bool {
match self {
StmState::With(_) => true,
_ => false,
}
}
}
pub type StmStateFlag = StmState<(), ()>;
/// An MDProcess allows the creation and propagation of a spacecraft subjected to some dynamics
pub struct MDProcess<'a>
where
DefaultAllocator: Allocator<f64, U6>,
{
sc_dyn: StmState<Spacecraft<'a, OrbitalDynamics<'a>>, Spacecraft<'a, OrbitalDynamicsStm<'a>>>,
formatter: Option<StateFormatter<'a>>,
pub output: Vec<State>,
pub prop_time_s: Option<f64>,
pub name: String,
}
impl<'a> MDProcess<'a>
where
DefaultAllocator: Allocator<f64, U6>,
{
pub fn try_from_scenario(
scen: &ScenarioSerde,
prop_name: String,
stm_flag: StmStateFlag,
cosm: &'a Cosm,
) -> Result<Self, ParsingError> {
match scen.propagator.get(&prop_name) {
None => Err(ParsingError::PropagatorNotFound(prop_name)),
Some(prop) => {
#[allow(unused_assignments)]
let mut sc_dyn_flagged = StmState::Unknown;
let mut init_state;
// Validate the output
let formatter = if let Some(output) = &prop.output {
match scen.output.get(output) {
None => {
return Err(ParsingError::MD(format!(
"propagator `{}` refers to undefined output `{}`",
prop_name, output
)))
}
Some(out) => Some(out.to_state_formatter(cosm)),
}
} else {
None
};
match scen.spacecraft.get(&prop.dynamics) {
None => {
return Err(ParsingError::MD(format!(
"propagator `{}` refers to undefined spacecraft `{}`",
prop_name, prop.dynamics
)))
}
Some(spacecraft) =>
// Validate the orbital dynamics
{
match scen.orbital_dynamics.get(&spacecraft.orbital_dynamics) {
None => {
return Err(ParsingError::MD(format!(
"spacecraft `{}` refers to undefined dynamics `{}`",
&prop.dynamics, spacecraft.orbital_dynamics
)))
}
Some(dynamics) => match scen.state.get(&dynamics.initial_state) {
None => {
return Err(ParsingError::MD(format!(
"dynamics `{}` refers to unknown state `{}`",
prop.dynamics, dynamics.initial_state
)))
}
Some(init_state_sd) => {
// Let's check the frames
let state_frame = cosm.frame(init_state_sd.frame.as_str());
init_state = init_state_sd.as_state(state_frame);
if let Some(integ_frame_name) = &dynamics.integration_frame {
let integ_frame = cosm.frame(integ_frame_name);
init_state = cosm.frame_chg(&init_state, integ_frame);
}
// Create the dynamics
if let Some(pts_masses) = &dynamics.point_masses {
// Get the object IDs from name
let mut bodies = Vec::with_capacity(10);
for obj in pts_masses {
match cosm.try_frame(obj) {
Ok(frame) => bodies.push(frame.exb_id()),
Err(_) => {
// Let's try with "j2000" appended
match cosm.try_frame(
format!("{} j2000", obj).as_str(),
) {
Ok(frame) => bodies.push(frame.exb_id()),
Err(_) => {
bodies.push(
cosm.frame(
format!(
"{} barycenter j2000",
obj
)
.as_str(),
)
.exb_id(),
);
}
}
}
}
}
// Remove bodies which are part of the state
if let Some(pos) =
bodies.iter().position(|x| *x == state_frame.exb_id())
{
bodies.remove(pos);
}
if stm_flag.with() {
let mut sc_dyn_stm = Spacecraft::with_stm(
OrbitalDynamicsStm::point_masses(
init_state, bodies, cosm,
),
spacecraft.dry_mass,
);
if let Some(fuel_mass) = spacecraft.fuel_mass {
sc_dyn_stm.fuel_mass = fuel_mass;
}
sc_dyn_flagged = StmState::With(sc_dyn_stm);
} else {
let mut sc_dyn = Spacecraft::new(
OrbitalDynamics::point_masses(
init_state, bodies, cosm,
),
spacecraft.dry_mass,
);
if let Some(fuel_mass) = spacecraft.fuel_mass {
sc_dyn.fuel_mass = fuel_mass;
}
sc_dyn_flagged = StmState::Without(sc_dyn);
}
} else if stm_flag.with() {
let mut sc_dyn_stm = Spacecraft::with_stm(
OrbitalDynamicsStm::two_body(init_state),
spacecraft.dry_mass,
);
if let Some(fuel_mass) = spacecraft.fuel_mass {
sc_dyn_stm.fuel_mass = fuel_mass;
}
sc_dyn_flagged = StmState::With(sc_dyn_stm);
} else {
let mut sc_dyn = Spacecraft::new(
OrbitalDynamics::two_body(init_state),
spacecraft.dry_mass,
);
if let Some(fuel_mass) = spacecraft.fuel_mass {
sc_dyn.fuel_mass = fuel_mass;
}
sc_dyn_flagged = StmState::Without(sc_dyn);
}
// Add the acceleration models if applicable
if let Some(accel_models) = &dynamics.accel_models {
for mdl in accel_models {
match scen.accel_models.get(mdl) {
None => {
return Err(ParsingError::MD(format!(
"dynamics `{}` refers to unknown state `{}`",
prop.dynamics, dynamics.initial_state
)))
}
Some(amdl) => {
for hmdl in amdl.harmonics.values() {
let in_mem = hmdl.load();
let compute_frame =
cosm.frame(hmdl.frame.as_str());
if stm_flag.with() {
let hh = HarmonicsDiff::from_stor(
compute_frame,
in_mem,
&cosm,
);
match sc_dyn_flagged {
StmState::With(
ref mut sc_dyn_stm,
) => {
sc_dyn_stm
.orbital_dyn
.add_model(Box::new(hh));
}
_ => panic!("should not happen"),
};
} else {
let hh = Harmonics::from_stor(
compute_frame,
in_mem,
&cosm,
);
match sc_dyn_flagged {
StmState::Without(
ref mut sc_dyn,
) => {
sc_dyn
.orbital_dyn
.add_model(Box::new(hh));
}
_ => panic!("should not happen"),
};
}
}
}
}
}
}
}
},
}
}
}
// Validate the stopping condition
// Let's see if it's a relative time
let prop_time_s = match parse_duration(prop.stop_cond.as_str()) {
Ok(duration) => duration,
Err(e) => {
// Check to see if it's an Epoch
match Epoch::from_str(prop.stop_cond.as_str()) {
Err(_) => return Err(e),
Ok(epoch) => epoch - init_state.dt,
}
}
};
Ok(Self {
sc_dyn: sc_dyn_flagged,
formatter,
output: Vec::with_capacity(65_535),
prop_time_s: Some(prop_time_s),
name: prop_name.clone(),
})
}
}
}
pub fn propagator(&mut self) -> Propagator<Spacecraft<'a, OrbitalDynamics<'a>>, RSSStepPV> {
match self.sc_dyn {
StmState::Without(ref mut sc_dyn) => Propagator::default(sc_dyn, &PropOpts::default()),
_ => panic!("these dynamics are defined with stm. Use stm_propagator instead"),
}
}
pub fn stm_propagator(
&mut self,
) -> Propagator<Spacecraft<'a, OrbitalDynamicsStm<'a>>, RSSStepPV> {
match self.sc_dyn {
StmState::With(ref mut sc_dyn) => Propagator::default(sc_dyn, &PropOpts::default()),
_ => panic!("these dynamics are defined without stm. Use propagator instead"),
}
}
pub fn state(&self) -> SpacecraftState {
match &self.sc_dyn {
StmState::With(sc_dyn) => sc_dyn.state(),
StmState::Without(sc_dyn) => sc_dyn.state(),
_ => panic!("only call state() on an initialized MDProcess"),
}
}
pub fn execute(&mut self) {
// Create the output file
let mut maybe_wtr = match &self.formatter {
Some(fmtr) => {
let mut wtr =
csv::Writer::from_path(fmtr.filename.clone()).expect("could not create file");
wtr.serialize(&fmtr.headers)
.expect("could not write headers");
info!("Saving output to {}", fmtr.filename);
Some(wtr)
}
None => None,
};
// Get the prop time before the mutable ref
let prop_time = self.prop_time_s.unwrap();
// Build the propagator
// let mut prop = Propagator::default(&mut self.sc_dyn, &PropOpts::default());
let mut prop = self.propagator();
// Set up the channels
let (tx, rx) = channel();
prop.tx_chan = Some(tx);
// Run
info!(
"Propagating for {} seconds (~ {:.3} days)",
prop_time,
prop_time / SECONDS_PER_DAY
);
let start = Instant::now();
prop.until_time_elapsed(prop_time);
info!(
"Done in {:.3} seconds",
(Instant::now() - start).as_secs_f64()
);
while let Ok(prop_state) = rx.try_recv() {
self.output.push(prop_state.orbit);
if let Some(wtr) = &mut maybe_wtr {
wtr.serialize(self.formatter.as_ref().unwrap().fmt(&prop_state.orbit))
.expect("could not format state");
}
}
}
}