diff --git a/src/osg/TexGen.cpp b/src/osg/TexGen.cpp
index 41d05c3be..0665a61ee 100644
--- a/src/osg/TexGen.cpp
+++ b/src/osg/TexGen.cpp
@@ -66,6 +66,14 @@ Plane& TexGen::getPlane(Coord which)
     }
 }
 
+void TexGen::setPlanesFromMatrix(const Matrixd& matrix)
+{
+    _plane_s.set(matrix(0,0),matrix(1,0),matrix(2,0),matrix(3,0));
+    _plane_t.set(matrix(0,1),matrix(1,1),matrix(2,1),matrix(3,1));
+    _plane_r.set(matrix(0,2),matrix(1,2),matrix(2,2),matrix(3,2));
+    _plane_q.set(matrix(0,3),matrix(1,3),matrix(2,3),matrix(3,3));    
+}
+
 void TexGen::apply(State&) const
 {