gsystem_example.cc File Reference

Minimal example : construct a world from command-line options. More...

#include "gworld.h"

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Functions
int	main (int argc, char *argv[])
	Program entry point.

Detailed Description

This example demonstrates the smallest executable that:

• creates a GOptions instance using gsystem module option definitions;
• constructs a GWorld, which loads systems, volumes, and (optional) modifiers.

Typical usage:

./gsystem_example -gsystem="[{name: b1, factory: sqlite, variation: default}]" -sql=gemc.db

The example intentionally performs no further actions beyond construction/destruction; it is meant as a smoke test for configuration and factory wiring.

Author

© Maurizio Ungaro

Definition in file gsystem_example.cc.

Function Documentation

main()

int main	(	int	argc,
		char *	argv[] )

Parameters

argc	Argument count from the command line.
argv	Argument vector from the command line.

Returns

EXIT_SUCCESS on clean construction/destruction.

Execution flow:

• Build a shared GOptions instance using gsystem::defineOptions().
• Construct a GWorld, which triggers full loading:
  • system discovery via gsystem::getSystems();
  • factory instantiation;
  • materials loading;
  • geometry loading;
  • modifier loading and application;
  • final Geant4 name assignment bookkeeping.

This program uses explicit new / delete to match existing ownership style in examples. In user applications, prefer automatic storage duration or smart pointers where appropriate.

Definition at line 48 of file gsystem_example.cc.