From Farshid Lashkari & Robert Osfield: Added support for VERTICAL_INTERLACE and HORIZONTAL_INTERLACE

stereo modes use the stencil buffer.

include/osg/DisplaySettings

@@ -90,7 +90,9 @@ class OSG_EXPORT DisplaySettings : public osg::Referenced
             HORIZONTAL_SPLIT,
             VERTICAL_SPLIT,
             LEFT_EYE,
-            RIGHT_EYE
+            RIGHT_EYE,
+            HORIZONTAL_INTERLACE,
+            VERTICAL_INTERLACE
         };
         
         void setStereoMode(StereoMode mode) { _stereoMode = mode; }

include/osgUtil/SceneView

@@ -113,6 +113,13 @@ class OSGUTIL_EXPORT SceneView : public osg::Referenced, public osg::CullSetting
         void setClearColor(const osg::Vec4& color) { _clearColor=color; }
         /** Get the color used in glClearColor.*/
         const osg::Vec4& getClearColor() const { return _clearColor; }
+        
+        
+        /** Mannually set the redraw interlaced stereo stencil mask request flag to control whether to redraw the stencil buffer on the next frame.*/  
+        void setRedrawInterlacedStereoStencilMask(bool flag) { _redrawInterlacedStereoStencilMask = flag; }
+
+        /** Get the redraw interlaced stereo stencil mask request flag.*/  
+        bool getRedrawInterlacedStereoStencilMask() const { return _redrawInterlacedStereoStencilMask; }
 
 
         void setGlobalStateSet(osg::StateSet* state) { _globalStateSet = state; }
@@ -504,6 +511,11 @@ class OSGUTIL_EXPORT SceneView : public osg::Referenced, public osg::CullSetting
         int                                         _activeUniforms;        
         double                                      _previousFrameTime;
         
+        bool                                        _redrawInterlacedStereoStencilMask;
+        int                                         _interlacedStereoStencilWidth;
+        int                                         _interlacedStereoStencilHeight;
+
+        
 };
 
 }