Added osg::CameraView to help application/modellers position their cameras in scenes. Note,

CameraView is *not* a camera, it isn't an active object, but a passive one that
camera must track each frame to following the path of the CameraView.

src/osg/CameraView.cpp

@@ -0,0 +1,53 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+#include <osg/CameraView>
+
+using namespace osg;
+
+CameraView::CameraView():
+    _fieldOfView(60.0),
+    _fieldOfViewMode(VERTICAL),
+    _focalLength(0.0)
+{
+}
+
+bool CameraView::computeLocalToWorldMatrix(Matrix& matrix,NodeVisitor*) const
+{
+    if (_referenceFrame==RELATIVE_RF)
+    {
+        matrix.preMult(osg::Matrix::rotate(_attitude)*
+                       osg::Matrix::translate(_position));
+    }
+    else // absolute
+    {
+        matrix = osg::Matrix::rotate(_attitude)*
+                 osg::Matrix::translate(_position);
+    }
+    return true;
+}
+
+
+bool CameraView::computeWorldToLocalMatrix(Matrix& matrix,NodeVisitor*) const
+{
+    if (_referenceFrame==RELATIVE_RF)
+    {
+        matrix.postMult(osg::Matrix::translate(-_position)*
+                        osg::Matrix::rotate(_attitude.inverse()));
+    }
+    else // absolute
+    {
+        matrix = osg::Matrix::translate(-_position)*
+                 osg::Matrix::rotate(_attitude.inverse());
+    }
+    return true;
+}

src/osg/GNUmakefile

@@ -16,6 +16,7 @@ CXXFILES =\
 	BoundingSphere.cpp\
 	BufferObject.cpp\
 	CameraNode.cpp\
+	CameraView.cpp\
 	ClearNode.cpp\
 	ClipNode.cpp\
 	ClipPlane.cpp\