WIP: need to add an example to show how fastsim model in g4 works..

Simulation/DetSimFastModel/CMakeLists.txt

+gaudi_subdir(DetSimFastModel v0r0)
+
+gaudi_depends_on_subdirs(
+    k4FWCore
+    Simulation/DetSimInterface
+)
+
+find_package(Geant4 REQUIRED ui_all vis_all)
+include(${Geant4_USE_FILE})
+find_package(DD4hep COMPONENTS DDG4 REQUIRED)
+
+set(DetSimFastModel_srcs
+    src/DummyFastSimG4Tool.cpp
+    src/DummyFastSimG4Model.cpp
+)
+
+gaudi_add_module(DetSimFastModel ${DetSimFastModel_srcs}
+    INCLUDE_DIRS
+    LINK_LIBRARIES
+        DD4hep
+        ${DD4hep_COMPONENT_LIBRARIES}
+        GaudiKernel
+)
+

Simulation/DetSimFastModel/src/DummyFastSimG4Model.cpp

+#include "DummyFastSimG4Model.h"

Simulation/DetSimFastModel/src/DummyFastSimG4Model.h

+#ifndef DummyFastSimG4Model_h
+#define DummyFastSimG4Model_h
+
+
+
+#endif
+

Simulation/DetSimFastModel/src/DummyFastSimG4Tool.cpp

+#include "DummyFastSimG4Tool.h"

Simulation/DetSimFastModel/src/DummyFastSimG4Tool.h

+#ifndef DummyFastSimG4Tool_h
+#define DummyFastSimG4Tool_h
+
+
+
+#endif