+ static DrawableRef default_drawable();
+ static DrawableRef copy_drawable(DrawableRef s);
+
+ //! set our starting x (horizontal) coordinate
+ void setX(float x);
+ //! get our starting x (horizontal) coordinate
+ float x() const;
+ //! set our current y (vertical) position
+ void setY(float y);
+ //! get our current y (vertical) position
+ float y() const;
+ //! get our current z (depth) position
+ float z() const;
+ //! how thick (high) the track we're drawing is
+ float height() const;
+
+ //! set our default draw color
+ void setColor(ColorRef &c );
+ //! return our draw color
+ const ColorRef color() const;
+ //! return our draw color
+ ColorRef color();
+