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+;;; guile-2d
+;;; Copyright (C) 2013 David Thompson <dthompson2@worcester.edu>
+;;;
+;;; Guile-2d is free software: you can redistribute it and/or modify it
+;;; under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation, either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; Guile-2d is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; Lesser General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with this program.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Game data structure.
+;;
+;;; Code:
+
+(define-module (2d private game)
+  #:use-module (srfi srfi-9)
+  #:use-module (2d observer))
+
+;;;
+;;; Scenes
+;;;
+
+(define-record-type <scene>
+  (%make-scene title observer update-proc draw-proc state)
+  scene?
+  (title scene-title)
+  (observer scene-observer)
+  (update-proc scene-update-proc)
+  (draw-proc scene-draw-proc)
+  (state scene-state))
+
+(define (scene-trigger scene event-type . args)
+  "Trigger an event on the scene observer."
+  (apply observer-trigger
+         (scene-observer scene)
+         event-type
+         (scene-state scene)
+         args))
+
+(define (scene-draw scene)
+  "Draw scene."
+  ((scene-draw-proc scene) (scene-state scene)))
+
+(define (scene-update scene)
+  "Update scene."
+  ((scene-update-proc scene) (scene-state scene)))
+
+(export <scene>
+        %make-scene
+        scene?
+        scene-title
+        scene-observer
+        scene-update-proc
+        scene-draw-proc
+        scene-state
+        scene-trigger
+        scene-update
+        scene-draw)
+
+;;;
+;;; Games
+;;;
+
+(define-record-type <game>
+  (%make-game title resolution fullscreen first-scene)
+  game?
+  (title game-title)
+  (resolution game-resolution)
+  (fullscreen game-fullscreen?)
+  (first-scene game-first-scene))
+
+(export <game>
+        %make-game
+        game?
+        game-title
+        game-resolution
+        game-fullscreen?
+        game-first-scene)