From 82ccaa74290c464c38687e9366642a412ab01d3a Mon Sep 17 00:00:00 2001
From: radi <radi_@web.de>
Date: Mon, 6 Oct 2014 11:23:27 +0200
Subject: [PATCH] add command line option --expire to fgelev, overriding the
 hardcoded default of 10 if given.

This improves performance _a lot_ if massively probing across
a bucket border as it prevents constant terrain unloading/reloading.
---
 utils/fgelev/fgelev.cxx | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/utils/fgelev/fgelev.cxx b/utils/fgelev/fgelev.cxx
index 3ad0b5850..5d9ae9f84 100644
--- a/utils/fgelev/fgelev.cxx
+++ b/utils/fgelev/fgelev.cxx
@@ -93,6 +93,10 @@ main(int argc, char** argv)
     // use an ArgumentParser object to manage the program arguments.
     osg::ArgumentParser arguments(&argc, argv);
 
+    unsigned expire;
+    if (arguments.read("--expire", expire)) {
+    } else expire = 10;
+    
     std::string fg_root;
     if (arguments.read("--fg-root", fg_root)) {
     } else if (const char *fg_root_env = std::getenv("FG_ROOT")) {
@@ -184,7 +188,7 @@ main(int argc, char** argv)
         // Increment the paging relevant number
         pager.setUseStamp(1 + pager.getUseStamp());
         // and expire everything not accessed for the past 30 requests
-        pager.update(10);
+        pager.update(expire);
 
         std::string id;
         std::cin >> id;