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;;; Lisp Game Jam 2018
;;; Copyright © 2018 David Thompson <davet@gnu.org>
;;;
;;; This program is free software: you can redistribute it and/or
;;; modify it under the terms of the GNU General Public License as
;;; published by the Free Software Foundation, either version 3 of the
;;; License, or (at your option) any later version.
;;;
;;; This program 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
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this program. If not, see
;;; <http://www.gnu.org/licenses/>.
(define-module (engine scene)
#:use-module (chickadee audio)
#:use-module (engine node-2d)
#:use-module (oop goops)
#:export (<scene>
background-music
background-music-volume
background-music-loop?))
(define-class <scene> (<node-2d>)
(background-music #:accessor background-music #:init-form #f
#:init-keyword #:music)
(background-music-volume #:accessor background-music-volume #:init-form 1.0
#:init-keyword #:music-volume)
(background-music-loop? #:accessor background-music-loop? #:init-form #t
#:init-keyword #:music-loop?))
(define-method (on-enter (scene <scene>))
(if (music? (background-music scene))
(begin
(set-music-volume! (background-music-volume scene))
(play-music (background-music scene)
#:loop? (background-music-loop? scene)))
(stop-music)))
(define-method (on-exit (scene <scene>))
(stop-music))
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