with
     openGL.texture_Set;


package openGL.Geometry.lit_textured
--
--  Supports per-vertex site texture and lighting.
--
is
   type Item is new openGL.Geometry.item with private;
   type View is access all Item'Class;


   function new_Geometry return View;


   ----------
   --  Vertex
   --

   type Vertex is
      record
         Site   : Vector_3;
         Normal : Vector_3;
         Coords : Coordinate_2D;
         Shine  : Real;
      end record;

   type Vertex_array       is array (     Index_t range <>) of aliased Vertex;
   type Vertex_large_array is array (long_Index_t range <>) of aliased Vertex;


   --------------
   --  Attributes
   --

   procedure Vertices_are (Self : in out Item;   Now       : in Vertex_array);
   procedure Vertices_are (Self : in out Item;   Now       : in Vertex_large_array);

   overriding
   procedure Indices_are  (Self : in out Item;   Now       : in Indices;
                                                 for_Facia : in Positive);


   --- Texturing.
   --

   procedure Fade_is      (Self : in out Item;   Which : texture_Set.texture_ID;   Now : in texture_Set.fade_Level);
   function  Fade         (Self : in     Item;   Which : texture_Set.texture_ID)     return texture_Set.fade_Level;


   procedure Texture_is   (Self : in out Item;   Which : texture_Set.texture_ID;   Now : in openGL.Texture.Object);
   function  Texture      (Self : in     Item;   Which : texture_Set.texture_ID)     return openGL.Texture.Object;

   overriding
   procedure Texture_is   (Self : in out Item;   Now : in openGL.Texture.Object);

   overriding
   function  Texture      (Self : in     Item)     return openGL.Texture.Object;



private

   type Item is new Geometry.item with
      record
         texture_Set : openGL.texture_Set.Item;
      end record;


   overriding
   procedure enable_Textures (Self : in out Item);

end openGL.Geometry.lit_textured;