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| -rw-r--r-- | 2d/scene.scm | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/2d/scene.scm b/2d/scene.scm new file mode 100644 index 0000000..9560379 --- /dev/null +++ b/2d/scene.scm @@ -0,0 +1,52 @@ +;;; 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: +;; +;; Scenes describe the behavioral aspects of a game. +;; +;;; Code: + +(define-module (2d scene) + #:use-module (srfi srfi-9) + #:export (make-scene + scene? + scene-init + scene-enter + scene-exit + scene-draw + scene-update)) + +(define-record-type <scene> + (%make-scene init enter exit draw update) + scene? + (init scene-init) + (enter scene-enter) + (exit scene-exit) + (draw scene-draw) + (update scene-update)) + +(define no-op (lambda args #f)) + +(define* (make-scene #:optional #:key + (init no-op) + (enter no-op) + (exit no-op) + (draw no-op) + (update no-op)) + "Create a new scene object. All callbacks default to a no-op." + (%make-scene init enter exit draw update)) |