From ff126c3d1db87fd87dbbdbb2fd2f98184f481eb1 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 14 Feb 2007 14:36:38 +0000
Subject: [PATCH] Added OSG_RUN_FRAME_COUNT env var which enables a limited run
 of specified frame numbers when Viewer::run is called.

---
 src/osgViewer/Viewer.cpp | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/src/osgViewer/Viewer.cpp b/src/osgViewer/Viewer.cpp
index 7302c6a76..4e07215d6 100644
--- a/src/osgViewer/Viewer.cpp
+++ b/src/osgViewer/Viewer.cpp
@@ -673,17 +673,30 @@ int Viewer::run()
         realize();
     }
 
-#if 1
+#if 0
     while (!done())
     {
         frame();
     }
 #else
-    int runTillFrameNumber = 100;
-    while (!done() && getFrameStamp()->getFrameNumber()<runTillFrameNumber)
+
+    const char* str = getenv("OSG_RUN_FRAME_COUNT");
+    if (str)
     {
-        frame();
+        int runTillFrameNumber = atoi(str);
+        while (!done() && getFrameStamp()->getFrameNumber()<runTillFrameNumber)
+        {
+            frame();
+        }
     }
+    else
+    {
+        while (!done())
+        {
+            frame();
+        }
+    }
+
 #endif    
     return 0;
 }