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Torch test #77

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Torch test #77

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3beee1a
Added testing torch
ggalgoczi Dec 5, 2024
9c21e69
Update README.md
ggalgoczi Dec 11, 2024
5cf78c3
Update README.md
ggalgoczi Dec 11, 2024
13e64bc
Fixed indents
ggalgoczi Dec 11, 2024
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15 changes: 9 additions & 6 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -14,12 +14,6 @@ cmake -S esi-g4ox -B build
cmake --build build
```

To run a test that generates a NumPy file (`out/photons.npy`) with the simulated photons, execute:

```bash
./build/src/simtox
```

Similarly, to start a Geant4-based simulation of optical photons, run:

```bash
Expand All @@ -32,6 +26,15 @@ Before runnning `simg4ox` it is recommended to set the following environment var
export TMP=/tmp/myname
export GEOM=mygeom
export OPTICKS_EVENT_MODE=DebugLite
QCurandState_SPEC=3:0:0 /usr/local/opticks/lib/QCurandStateTest
opticks_running_mode=SRM_TORCH
export storch_FillGenstep_pos=0,-270,0
export storch_FillGenstep_type=rectangle
export storch_FillGenstep_zenith=-20,20
export storch_FillGenstep_azimuth=-20,20
export OPTICKS_RUNNING_MODE=${OPTICKS_RUNNING_MODE:-$opticks_running_mode}
export OPTICKS_NUM_PHOTON=100
unset export SGenerate__GeneratePhotons_RNG_PRECOOKED=NO
```


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153 changes: 8 additions & 145 deletions src/g4app.h
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Expand Up @@ -26,13 +26,15 @@
#include "G4SDManager.hh"
#include "SysRap/NP.hh"
#include "SysRap/SEvt.hh"
#include "SysRap/SGenerate.h"
#include "SysRap/STrackInfo.h"
#include "SysRap/spho.h"
#include "SysRap/sphoton.h"
#include "U4/U4Random.hh"
#include "U4/U4StepPoint.hh"
#include "U4/U4Touchable.h"
#include "U4/U4Track.h"
#include "U4/U4VPrimaryGenerator.h"

bool IsSubtractionSolid(G4VSolid *solid)
{
Expand Down Expand Up @@ -280,37 +282,12 @@ struct PrimaryGenerator : G4VUserPrimaryGeneratorAction

void GeneratePrimaries(G4Event *event) override
{
NP *photons = NP::Make<float>(0, 4, 4);

photons->load("out/photons.npy");

size_t n_photons = photons->num_items();
sphoton *sphotons = reinterpret_cast<sphoton *>(photons->bytes());

for (int i = 0; i < n_photons; i++)
{
sphoton &p = sphotons[i];

G4ThreeVector position_mm(p.pos.x, p.pos.y, p.pos.z);
G4double time_ns = p.time;
G4ThreeVector direction(p.mom.x, p.mom.y, p.mom.z);
// direction = direction.unit();
G4double wavelength_nm = p.wavelength;
G4ThreeVector polarization(p.pol.x, p.pol.y, p.pol.z);

G4PrimaryVertex *vertex = new G4PrimaryVertex(position_mm, time_ns);
G4double kineticEnergy = h_Planck * c_light / (wavelength_nm * nm);

G4PrimaryParticle *particle = new G4PrimaryParticle(G4OpticalPhoton::Definition());
particle->SetKineticEnergy(kineticEnergy);
particle->SetMomentumDirection(direction);
particle->SetPolarization(polarization);

vertex->SetPrimary(particle);
event->AddPrimaryVertex(vertex);
}

sev->SetInputPhoton(photons);
int idx_arg = event->GetEventID();
NP *gs = SEvent::MakeTorchGenstep(idx_arg);
NP *ph = SGenerate::GeneratePhotons(gs);
U4VPrimaryGenerator::GeneratePrimaries_From_Photons(event, ph);
delete ph;
SEvent::SetGENSTEP(gs);
}
};

Expand All @@ -330,13 +307,9 @@ struct EventAction : G4UserEventAction
void EndOfEventAction(const G4Event *event) override
{
int eventID = event->GetEventID();
sev->addEventConfigArray();
sev->gather();
sev->endOfEvent(eventID);

// GPU-based simulation
G4CXOpticks *gx = G4CXOpticks::Get();

gx->simulate(eventID, false);
cudaDeviceSynchronize();
unsigned int num_hits = SEvt::GetNumHit(0);
Expand All @@ -363,17 +336,6 @@ struct EventAction : G4UserEventAction
}
};

void get_label(spho &ulabel, const G4Track *track)
{
spho *label = STrackInfo<spho>::GetRef(track);
assert(label && label->isDefined() && "all photons are expected to be labelled");

std::array<int, spho::N> a_label;
label->serialize(a_label);

ulabel.load(a_label);
}

struct SteppingAction : G4UserSteppingAction
{
SEvt *sev;
Expand All @@ -387,47 +349,6 @@ struct SteppingAction : G4UserSteppingAction
// std::cout<< step->GetPreStepPoint()->GetPhysicalVolume()->GetName() << std::endl;
if (step->GetTrack()->GetDefinition() != G4OpticalPhoton::OpticalPhotonDefinition())
return;

const G4VProcess *process = step->GetPreStepPoint()->GetProcessDefinedStep();

if (process == nullptr)
return;

const G4Track *track = step->GetTrack();
G4VPhysicalVolume *pv = track->GetVolume();
const G4VTouchable *touch = track->GetTouchable();

spho ulabel = {};
get_label(ulabel, track);

const G4StepPoint *pre = step->GetPreStepPoint();
const G4StepPoint *post = step->GetPostStepPoint();

G4ThreeVector delta = step->GetDeltaPosition();
double step_mm = delta.mag() / mm;

sev->checkPhotonLineage(ulabel);

sphoton &current_photon = sev->current_ctx.p;

if (current_photon.flagmask_count() == 1)
{
U4StepPoint::Update(current_photon, pre); // populate current_photon with pos, mom, pol, time, wavelength
sev->pointPhoton(ulabel); // copying current into buffers
}

bool tir;
unsigned flag = U4StepPoint::Flag<G4OpBoundaryProcess>(post, true, tir);
bool is_detect_flag = OpticksPhoton::IsSurfaceDetectFlag(flag);

current_photon.iindex =
is_detect_flag ? U4Touchable::ImmediateReplicaNumber(touch) : U4Touchable::AncestorReplicaNumber(touch);

U4StepPoint::Update(current_photon, post);

current_photon.set_flag(flag);

sev->pointPhoton(ulabel);
}
};

Expand All @@ -442,72 +363,14 @@ struct TrackingAction : G4UserTrackingAction

void PreUserTrackingAction_Optical_FabricateLabel(const G4Track *track)
{
U4Track::SetFabricatedLabel<spho>(track);
spho *label = STrackInfo<spho>::GetRef(track);
assert(label);
}

void PreUserTrackingAction(const G4Track *track) override
{
spho *label = STrackInfo<spho>::GetRef(track);

if (label == nullptr)
{
PreUserTrackingAction_Optical_FabricateLabel(track);
label = STrackInfo<spho>::GetRef(track);
}

assert(label && label->isDefined());

std::array<int, spho::N> a_label;
label->serialize(a_label);

spho ulabel = {};
ulabel.load(a_label);

U4Random::SetSequenceIndex(ulabel.id);

bool resume_fSuspend = track == transient_fSuspend_track;

if (ulabel.gen() == 0)
{
if (resume_fSuspend == false)
sev->beginPhoton(ulabel);
else
sev->resumePhoton(ulabel);
}
else if (ulabel.gen() > 0)
{
if (resume_fSuspend == false)
sev->rjoinPhoton(ulabel);
else
sev->rjoin_resumePhoton(ulabel);
}
}

void PostUserTrackingAction(const G4Track *track) override
{
G4TrackStatus tstat = track->GetTrackStatus();

bool is_fStopAndKill = tstat == fStopAndKill;
bool is_fSuspend = tstat == fSuspend;
bool is_fStopAndKill_or_fSuspend = is_fStopAndKill || is_fSuspend;

assert(is_fStopAndKill_or_fSuspend);

spho ulabel = {};
get_label(ulabel, track);

if (is_fStopAndKill)
{
U4Random::SetSequenceIndex(-1);
sev->finalPhoton(ulabel);
transient_fSuspend_track = nullptr;
}
else if (is_fSuspend)
{
transient_fSuspend_track = track;
}
}
};

Expand Down
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