// gui.cxx
extern void guiStartInit(osg::GraphicsContext*);
extern bool guiFinishInit();
+extern bool openBrowser(string address);
extern void mkDialog(const char *txt);
extern void guiErrorMessage(const char *txt);
extern void guiErrorMessage(const char *txt, const sg_throwable &throwable);
extern bool fgDumpSnapShot();
extern void fgDumpSceneGraph();
extern void fgDumpTerrainBranch();
+extern void fgPrintVisibleSceneInfoCommand();
extern puFont guiFnt;
extern fntTexFont *guiFntHandle;