Added support for set/getColor to ShapeDrawable.

include/osg/ShapeDrawable

@@ -123,12 +123,19 @@ class SG_EXPORT ShapeDrawable : public Drawable
         virtual const char* libraryName() const { return "osg"; }
         virtual const char* className() const { return "ShapeDrawable"; }
 
+        /** set the color of the shape.*/
+        void setColor(const Vec4& color) { _color = color; }
+        
+        /** get the color of the shape.*/
+        const Vec4& getColor() const { return _color; }
 
     	void setTessellationHints(TessellationHints* hints) { _tessellationHints = hints; }
+        
     	TessellationHints* getTessellationHints() { return _tessellationHints.get(); }
     	const TessellationHints* getTessellationHints() const { return _tessellationHints.get(); }
 
 
+
         /** draw ShapeDrawable directly ignoring an OpenGL display list which could be attached.
           * This is the internal draw method which does the drawing itself,
           * and is the method to override when deriving from ShapeDrawable for user-drawn objects.
@@ -158,6 +165,8 @@ class SG_EXPORT ShapeDrawable : public Drawable
        
         virtual bool computeBound() const;
 	
+        Vec4 _color;
+
 	ref_ptr<TessellationHints> _tessellationHints;
 
 };