From fa996d0745e432ccca2b67bddb4fd03a7afe922c Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Mon, 25 Apr 2005 20:34:23 +0000
Subject: [PATCH] From Mike Weiblen, added support for --clear-color r,g,b,a
 and --clear-color r,g,b to osgProducer::Viewer.

---
 src/osgProducer/Viewer.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/osgProducer/Viewer.cpp b/src/osgProducer/Viewer.cpp
index dc5b37c26..59961400b 100644
--- a/src/osgProducer/Viewer.cpp
+++ b/src/osgProducer/Viewer.cpp
@@ -18,6 +18,8 @@
 #include <osgProducer/Viewer>
 #include <osgProducer/ViewerEventHandler>
 
+#include <stdio.h>
+
 using namespace Producer;
 using namespace osgProducer;
 using namespace osg;
@@ -327,6 +329,7 @@ Viewer::Viewer(osg::ArgumentParser& arguments):
         arguments.getApplicationUsage()->addCommandLineOption("-p <filename>","Specify camera path file to animate the camera through the loaded scene");
         arguments.getApplicationUsage()->addCommandLineOption("--run-till-frame-number <integer>","Specify the number of frame to run");
         arguments.getApplicationUsage()->addCommandLineOption("--run-till-elapsed-time","Specify the about of time to run");
+        arguments.getApplicationUsage()->addCommandLineOption("--clear-color <float>,<float>,<float>[,<float>]","Specify the clear color as RGB or RGBA");
     }
 
     osg::DisplaySettings::instance()->readCommandLine(arguments);
@@ -361,6 +364,16 @@ Viewer::Viewer(osg::ArgumentParser& arguments):
         setWriteImageWhenDone(true);
         setWriteImageFileName(filename);
     }
+
+    std::string colorStr;
+    while (arguments.read("--clear-color",colorStr))
+    {
+        float r, g, b;
+        float a = 1.0f;
+        int cnt = sscanf( colorStr.c_str(), "%f,%f,%f,%f", &r, &g, &b, &a );
+        if( cnt==3 || cnt==4 ) setClearColor( osg::Vec4(r,g,b,a) );
+        else osg::notify(osg::WARN)<<"Invalid clear color \""<<colorStr<<"\""<<std::endl;
+    }
 }
 
 Viewer::~Viewer()