indexing

	description: "[

		This factory creates buildings.

	]"
	date: "$Date$"
	revision: "$Revision$"

class BUILDING_FACTORY

inherit

	EM_3D_OBJECT_FACTORY

	EM_SHARED_BITMAP_FACTORY
		export {NONE} all	end

	EM_CONSTANTS
		export {NONE} all end

	GL_FUNCTIONS
		export {NONE} all end

create

	make

feature {NONE} -- Initialization

	make is
			-- Initialise object.
		do
			bitmap_factory.create_bitmap_from_image ("objects/build_side.png")
			create tex_side.make_from_surface (bitmap_factory.last_bitmap)
			tex_side.save
		end

feature -- Commands

	create_building_object: BUILDING is
			-- Create a new building object that is collidable and includes the model
		do
			create result.make (create_object)
		end

feature -- Status

	object_width: DOUBLE is 2.0
			-- The size of the bounding box in x direction of created objects

	object_height: DOUBLE is 8.0
			-- The size of the bounding box in y direction of created objects

	object_depth: DOUBLE is 2.0
			-- The size of the bounding box in z direction of created objects

feature {NONE} -- implementation

	tex_side: GL_STATIC_MIPMAP_TEXTURE
			-- Side texture id

	specify_object is
			-- Specify an object that can be drawn in the origin
			-- (front, left, lower corner of bounding box = 0,0,0)
		do
			gl_push_attrib ( Em_gl_enable_bit | Em_gl_color_buffer_bit)
			gl_enable (Em_gl_texture_2d)

			gl_bind_texture (Em_gl_texture_2d, tex_side.id)
			gl_begin ( Em_gl_quads )
				-- front
				gl_tex_coord2f ( 0, 1 )
				gl_vertex3d ( 0, 0, 0 )

				gl_tex_coord2f ( 0, 0 )
				gl_vertex3d ( 0, object_height, 0 )

				gl_tex_coord2f ( 1, 0 )
				gl_vertex3d ( object_width, object_height, 0 )

				gl_tex_coord2f ( 1, 1 )
				gl_vertex3d ( object_width, 0, 0 )

				-- left
				gl_tex_coord2f ( 0, 1 )
				gl_vertex3d ( 0, 0, -object_depth )

				gl_tex_coord2f ( 0, 0 )
				gl_vertex3d ( 0, object_height, -object_depth )

				gl_tex_coord2f ( 1, 0 )
				gl_vertex3d ( 0, object_height, 0 )

				gl_tex_coord2f ( 1, 1 )
				gl_vertex3d ( 0, 0, 0 )

				-- back
				gl_tex_coord2f ( 0, 1 )
				gl_vertex3d ( object_width, 0, -object_depth )

				gl_tex_coord2f ( 0, 0 )
				gl_vertex3d ( object_width, object_height, -object_depth )

				gl_tex_coord2f ( 1, 0 )
				gl_vertex3d ( 0, object_height, -object_depth )

				gl_tex_coord2f ( 1, 1 )
				gl_vertex3d ( 0, 0, -2 )

				-- right
				gl_tex_coord2f ( 0, 1 )
				gl_vertex3d ( object_width, 0, 0 )

				gl_tex_coord2f ( 0, 0 )
				gl_vertex3d ( object_width, object_height, 0 )

				gl_tex_coord2f ( 1, 0 )
				gl_vertex3d ( object_width, object_height, -object_depth )

				gl_tex_coord2f ( 1, 1 )
				gl_vertex3d ( object_width, 0, -object_depth )
			gl_end

			gl_begin ( Em_gl_quads )
				-- deactivate texture
				gl_disable (Em_gl_texture_2d)
				gl_color3f (0,0,0)

				-- Bottom
				gl_vertex3d ( 0, 0, 0 )
				gl_vertex3d ( 0, 0, -2 )
				gl_vertex3d ( object_width, 0, -object_depth )
				gl_vertex3d ( object_width, 0, 0 )

				-- Top
				gl_vertex3d ( 0, object_height, 0 )
				gl_vertex3d ( 0, object_height, -object_depth )
				gl_vertex3d ( object_width, object_height, -object_depth )
				gl_vertex3d ( object_width, object_height, 0 )
			gl_end

			-- restore old attrib stack
			gl_pop_attrib
		end

end