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Add dittoMC oo, add injection #2483

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671612e
Add dittoMC oo
njacazio Sep 28, 2026
e731750
Add Ditto with injection
njacazio Oct 2, 2026
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4 changes: 4 additions & 0 deletions MC/config/ALICE3/ini/ditto_oo_536tev.ini
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
#---> pythia8_pp_136tev
[GeneratorExternal]
fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator_DittoMC.C
funcName=generator_DittoMC("https://github.com/njacazio/DittoMC/releases/download/v1.0.1/Ditto_tune_pythia8_OO_536.root")
2 changes: 1 addition & 1 deletion MC/config/ALICE3/ini/ditto_pbpb_536tev.ini
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
#---> pythia8_pp_136tev
[GeneratorExternal]
fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator_DittoMC.C
funcName=generator_DittoMC("https://github.com/njacazio/DittoMC/releases/download/v1.0.0/Ditto_tune_pythia8_PbPb_536tev.root")
funcName=generator_DittoMC("https://github.com/njacazio/DittoMC/releases/download/v1.0.1/Ditto_tune_pythia8_PbPb_536tev.root")
4 changes: 4 additions & 0 deletions MC/config/ALICE3/ini/ditto_pbpb_536tev_inj.ini
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
#---> pythia8_pp_136tev
[GeneratorExternal]
fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator_DittoMC.C
funcName=generator_DittoMC("https://github.com/njacazio/DittoMC/releases/download/v1.0.1/Ditto_tune_pythia8_PbPb_536tev.root", "https://github.com/njacazio/DittoMC/releases/download/v1.0.1/signal_pbpb.root")
2 changes: 1 addition & 1 deletion MC/config/ALICE3/ini/ditto_pp_136tev.ini
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
#---> pythia8_pp_136tev
[GeneratorExternal]
fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator_DittoMC.C
funcName=generator_DittoMC("https://github.com/njacazio/DittoMC/releases/download/v1.0.0/Ditto_tune_pythia8_inel_136tev.root")
funcName=generator_DittoMC("https://github.com/njacazio/DittoMC/releases/download/v1.0.1/Ditto_tune_pythia8_inel_136tev.root")
4 changes: 4 additions & 0 deletions MC/config/ALICE3/ini/ditto_pp_136tev_inj.ini
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Original file line number Diff line number Diff line change
@@ -0,0 +1,4 @@
#---> pythia8_pp_136tev
[GeneratorExternal]
fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/ALICE3/pythia8/generator_DittoMC.C
funcName=generator_DittoMC("https://github.com/njacazio/DittoMC/releases/download/v1.0.1/Ditto_tune_pythia8_inel_136tev.root", "https://github.com/njacazio/DittoMC/releases/download/v1.0.1/signal.root")
23 changes: 14 additions & 9 deletions MC/config/ALICE3/pythia8/generator_DittoMC.C
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Expand Up @@ -11,9 +11,9 @@
// Ditto event generator
class GeneratorDittoMC : public o2::eventgen::GeneratorPythia8
{
public:
public:
/// Constructor
explicit GeneratorDittoMC(const TString& tuneFile) : mGenerator(makeConfig(tuneFile))
explicit GeneratorDittoMC(const TString &tuneFile, const TString &signalFile) : mGenerator(makeConfig(tuneFile, signalFile))
{
// We use the Pythia8 event only as the container passed to the O2
// GeneratorPythia8 machinery. Particle production is handled by Ditto.
Expand All @@ -31,22 +31,27 @@ class GeneratorDittoMC : public o2::eventgen::GeneratorPythia8
/// Destructor
~GeneratorDittoMC() override = default;

private:
private:
/// Build the Ditto runtime configuration.
static Ditto::Config makeConfig(const TString& tuneFile)
static Ditto::Config makeConfig(const TString &tuneFile, const TString &signalFile)
{
if (tuneFile.IsNull()) {
if (tuneFile.IsNull())
{
throw std::runtime_error("Ditto tune file must be specified");
}

Ditto::Config config;
config.mTuneFile = tuneFile.Data();
config.mSignalFile = signalFile.Data();

// Use the Grid process ID as the Ditto seed when available.
// Outside the Grid, seed 0 is used.
if (const char* alienProcId = std::getenv("ALIEN_PROC_ID")) {
if (const char *alienProcId = std::getenv("ALIEN_PROC_ID"))
{
config.mSeed = static_cast<std::uint64_t>(std::strtoull(alienProcId, nullptr, 10));
} else {
}
else
{
config.mSeed = static_cast<std::uint64_t>(std::time(nullptr));
}

Expand All @@ -58,7 +63,7 @@ class GeneratorDittoMC : public o2::eventgen::GeneratorPythia8
Ditto::Generator mGenerator;
};

FairGenerator* generator_DittoMC(const TString& tuneFile)
FairGenerator *generator_DittoMC(const TString &tuneFile, const TString &signalFile = "")
{
return new GeneratorDittoMC(tuneFile);
return new GeneratorDittoMC(tuneFile, signalFile);
}
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