From 63a816ac334f10b60c2c03e2468de90df87462f4 Mon Sep 17 00:00:00 2001
From: Whitney Armstrong <warmstrong@anl.gov>
Date: Thu, 8 Jul 2021 14:36:48 -0500
Subject: [PATCH] Added simple dd4hep example
To run root script:
```
root -b -q scripts/example_dd4hep.cxx+
```
---
scripts/example_dd4hep.cxx | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
create mode 100644 scripts/example_dd4hep.cxx
diff --git a/scripts/example_dd4hep.cxx b/scripts/example_dd4hep.cxx
new file mode 100644
index 00000000..bf6b24e8
--- /dev/null
+++ b/scripts/example_dd4hep.cxx
@@ -0,0 +1,36 @@
+#include "DD4hep/Detector.h"
+#include "DDG4/Geant4Data.h"
+#include "DDRec/CellIDPositionConverter.h"
+#include "DDRec/SurfaceManager.h"
+#include "DDRec/Surface.h"
+
+
+#include "fmt/core.h"
+
+
+/** Example using dd4hep
+ */
+void example_dd4hep(const char* fname = "test_tracker_disc.root"){
+
+ using namespace ROOT::Math;
+
+ // -------------------------
+ // Get the DD4hep instance
+ // Load the compact XML file
+ // Initialize the position converter tool
+ dd4hep::Detector& detector = dd4hep::Detector::getInstance();
+ detector.fromCompact("athena.xml");
+ dd4hep::rec::CellIDPositionConverter cellid_converter(detector);
+
+ fmt::print("Detector Types:\n");
+ for(const auto& dtype : detector.detectorTypes() ) {
+ fmt::print(" {}\n", dtype);
+ }
+
+ fmt::print("\n");
+ fmt::print("All detector subsystem names:\n");
+ for(const auto& d : detector.detectors() ) {
+ fmt::print(" {}\n", d.first);
+ }
+
+}
--
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