読者です 読者をやめる 読者になる 読者になる

`(kakko ,man)

Find a guide into tomorrow by taking lessons from the past

Lisp Game Programming <Step2>

Game Structure

Step2はサウンド関係のプログラムを追加

ここを参照

https://github.com/skypher/lispbuilder/blob/master/lispbuilder-sdl-mixer/examples/mixer.lisp

http://lispbuilder.sourceforge.net/lispbuilder-sdl-mixer.html

Emacs+Slime上からSBCL、CCL、ECLを起動して試したが、まともに終了できたのはSBCLだけだった

 ⇒ (sdl-mixer:close-audio)でクラッシュ

            追記:XPの環境下ではCCLも正常終了した

http://mclass13.web.fc2.com/hspstudy/exefile.htm

 ⇒ サウンドデータ、イメージデータを自分のプログラム作成用作業ホルダ   
   c:\\work\\sound c:\\work\\graphics にコピーしておく(バックスラッシュの表示の場合は¥に置き換え)

プログラムは、ウィンドウを開く、サウンドオープン、Shot音、BGMの順
終了は、終了ボタン(X)を押すと、サウンドの停止、開放、クローズの順

 ⇒ step2.lisp

;;;; The Common-Shooter
;;; Step1 <Game Frame>
;;; Step2 <Audio>

;; Step2 <Audio>
;; -----------------------------------------------------------------------------------------------
(defparameter *path-shot-sound* "C:\\work\\sound\\tm2_shoot003.wav")
(defparameter *path-shipbom-sound* "C:\\work\\sound\\bom01.wav")
(defparameter *path-enemybom-sound* "C:\\work\\sound\\tm2_bom001.wav")
(defparameter *path-background-music* "C:\\work\\sound\\rbutai_xg.mid")
(defvar *shot-sound*) ; shot sound
(defvar *shipbom-sound*) ; ship bom sound
(defvar *enemybom-sound*) ; enemy bom sound
(defvar *bg-music*) ; background music

(defun Open-sound ()
   "load sound data and set"
   (sdl-mixer:open-audio :chunksize 1024 :channels 2)
   (sdl-mixer:allocate-channels 16)
   (setf *shot-sound* (sdl-mixer:load-sample *path-shot-sound*)
           *shipbom-sound* (sdl-mixer:load-sample *path-shipbom-sound*)
           *enemybom-sound* (sdl-mixer:load-sample *path-enemybom-sound*)
          *bg-music* (sdl-mixer:load-music *path-background-music*)))

(defun Stop-sound ()
   "sound stop"
   (when (sdl-mixer:music-playing-p)
     (sdl-mixer:halt-music)) ; BGM stop
   (when (sdl-mixer:sample-playing-p nil)
     (sdl-mixer:halt-sample))) ; Shot,Bom sound stop

(defun Close-sound ()
   "close sound file"
   (sdl-mixer:free *shot-sound*) ; free shot sound
   (sdl-mixer:free *shipbom-sound*) ; free ship bom sound
   (sdl-mixer:free *enemybom-sound*) ; free enemy bom sound
   (sdl-mixer:free *bg-music*) ; free background music
   (sdl-mixer:close-audio))

(defun Play-music (music)
   "play music"
  (sdl-mixer:play-music music :loop t :position 0)) ; BGM start

(defun Play-sample (sample)
   "play sample"
   (sdl-mixer:play-sample sample)) ; shot sound

;; step1 <Game Frame>
;; -----------------------------------------------------------------------------------------------
(defun Common-shooter ()
   "main routine"
   (sdl:with-init (sdl:sdl-init-video sdl:sdl-init-audio) ; use video and audio
     (sdl:window 640 480 :position #(192 50) ; size 640*480, position x(192) y(50)
                                       :title-caption "THE SHOOTER"
                                       :icon-caption "THE SHOOTER"
                                       :double-buffer T)
                                     ; :fullscreen T)
     ; step 2
     (Open-sound) ; open audio and load sound data
     (Play-sample *shot-sound*) ; play sample
     (Play-music *bg-music*) ; play music

    (sdl:update-display)
    (sdl:with-events (:poll)
       (:quit-event ()

       ; step 2
       (Stop-sound) ; sample and music stop
      
(Close-sound) ; close audio

         t)
       (:idle ()
         ; Game body

         (sdl:update-display)))))