From 8a5d7f9bfb01910f0c922359c260d1c3a4e2bae3 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Tue, 6 Aug 2002 10:04:06 +0000
Subject: [PATCH] Adde getViewFrustum() to camera.

---
 include/osg/Camera | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/osg/Camera b/include/osg/Camera
index 3e30dce76..e49c8d69f 100644
--- a/include/osg/Camera
+++ b/include/osg/Camera
@@ -12,6 +12,7 @@
 #include <osg/Quat>
 #include <osg/Viewport>
 #include <osg/DisplaySettings>
+#include <osg/Polytope>
 
 namespace osg {
 
@@ -271,8 +272,15 @@ class SG_EXPORT Camera: public osg::Referenced
         const Matrix getModelViewMatrix() const;
 
 
-
-
+        /** Get the camera view frsutm.*/
+        inline Polytope getViewFrustum() const
+        {
+            Polytope cv;
+            cv.setToUnitFrustum();
+            cv.transformProvidingInverse(getModelViewMatrix()*
+                                         getProjectionMatrix());
+            return cv;
+        }