Lisp Game Programming 2<Stage 6-2>
<Stage 6-1>で作った,enemy-map-list.lispとmove-pattern.lispを読み込むテストプログラムを作ってみた。
画面イメージのidを使用しているため、敵の画像が回転したりするとidが切り替わる仕様のため、かなりゴチャゴチャしたプログラムとなってしまった。
たとえば、敵１（仮称）は7→8→9→8→7→････と画像が切り替わるため、Move-enemyメソットでは敵１のidすべての場合をcaseで判断している。
なお、敵１はid (7 8 9 )であり、敵２はid(80 81 82)となる。
面白いのは、画像のパターンが切り替わるところのプログラムで、オリジナルプログラムでの工夫の跡が読み取れる。
なお、青字の*enemy-map2*を*enemy-map1*や*enemy-map3*に代えると、当然違うパターンで敵が現れる。
enemy-test.lisp ⇒
;;;; The Common-Abogadro
;;;
;;; -------- Enemy Test --------
;;;
;; step1 <Sprite Sheets>
;; -----------------------------------------------------------------------------------------------
(load "C:\\work\\sprite-sheets.lisp")
;; step2 <Enemy Map List>
;; -----------------------------------------------------------------------------------------------
(load "C:\\work\\enemy-map-list.lisp")
;; step2 <Move Pattern>
;; -----------------------------------------------------------------------------------------------
(load "C:\\work\\move-pattern.lisp")
;; step1 <Define Package>
;; -----------------------------------------------------------------------------------------------
(defpackage :game
(:use :common-lisp :lispbuilder-sdl :sprite-sheets :enemy-map-list :move-pattern)
(:nicknames :shooting)
(:export #:Common-abogadro))
(in-package :game)
;; step2 <Macro>
;; -----------------------------------------------------------------------------------------------
(defmacro define-class (name superclasses slots form)
`(defclass ,name ,superclasses
,(mapcar (lambda (slot)
(let ((keyword (intern (symbol-name slot) :keyword)))
`(,slot :initarg ,keyword :initform ,form :accessor ,slot)))
slots)))
;;step2 <Character Object>
;; -----------------------------------------------------------------------------------------------
(define-class object ()
(id x y width height) 0)
; id graphic id in imageid
; x upper left corner
; y upper left corner
; width from upper left corner
; height from upper left corner
(define-class entity (object)
(dx dy explode-cnt state) 0)
; dx x direction speed
; dy y direction speed
; explode-cnt explosion counter(wait)
; state ship 0:dead 1:alive 2:explosion 3:revival
; enemy 0:dead 1:alive 2:damage 3:explosion
(define-class foe (entity)
(move-cnt damage-cnt life-cnt kind) 0)
; move-cnt moving counter (distance)
; damage-cnt enemy damage counter(wait)
; life-cnt enemy life counter (life time)
; kind kind of enemy
(define-class enemy-manager ()
(enemy-list) nil)
; enemy-list list of enemy
(define-class game-field ()
(field-x field-y width height) 0)
; field-x game field upper left x
; field-y game field upper left y
; width game field width
; height game field height
;; step3 <Draw Images>
;; -----------------------------------------------------------------------------------------------
(defun Draw (obj)
"character draw"
(sdl:draw-surface-at-* *images* (x obj) (y obj) :cell (id obj)))
;; step1 <Initialize>
;; -----------------------------------------------------------------------------------------------
(defun Initialize ()
"graphics initialize"
(setf (sdl:frame-rate) 60) ; frame rate set
(setf *random-state* (make-random-state t)) ; random set
(Set-imageid) ; imageid set
(sdl:show-cursor nil)) ; cursor not show
(defvar *scroll-cnt* 0) ; scroll counter
(defvar *enemy-map-pointer* 64)
(defgeneric Generate-enemy (map enemy-manager))
(defmethod Generate-enemy (map enemy-manager)
(when (and (= (mod *scroll-cnt* 64) 0)
(<= *scroll-cnt* 4096))
(dotimes (j 10)
(when (/= (aref map *enemy-map-pointer* j) -1)
(case (aref map *enemy-map-pointer* j)
((7 50 80) ; when id is 7 or 50 or 80
(let ((enemy (make-instance 'foe ; small class enemy generate
:id (aref map *enemy-map-pointer* j)
:x (+ 160 (* j 32)) :y 0 :kind 1 :state 1)))
(push enemy (enemy-list enemy-manager))))
((76 78) ; when id is 76 or 78
(let ((enemy (make-instance 'foe ; middle class enemy generate
:id (aref map *enemy-map-pointer* j)
:x (+ 160 (* j 32)) :y 0 :kind 2 :state 1)))
(push enemy (enemy-list enemy-manager))))
((70 71 72) ; when id is 70 or 71 or 72
(let ((enemy (make-instance 'foe ; large class enemy generate
:id (aref map *enemy-map-pointer* j)
:x (+ 160 (* j 32)) :y 0 :kind 3 :state 1)))
(push enemy (enemy-list enemy-manager))))
((17 18) ; when id is 17 or 18
(let ((enemy (make-instance 'foe ; item generate
:id (aref map *enemy-map-pointer* j)
:x (+ 160 (* j 32)) :y 0 :dx 0 :dy 1 :kind 4 :state 1)))
(push enemy (enemy-list enemy-manager)))))))
(decf *enemy-map-pointer*)))
(defgeneric Move-enemy (enemy-manager game-field))
(defmethod Move-enemy (enemy-manager game-field)
(dolist (enemy (enemy-list enemy-manager))
(when (= (state enemy) 1)
(case (id enemy)
((7 8 9 80 81 82) ; id 7 8 9 or id 80 81 82 small size enemy
(let((row (mod (move-cnt enemy) 16))) ; row from 0 to 15
(case (id enemy)
((7 8 9) ; id 7 8 9(yellow)
(setf (dx enemy) (aref *enemy-move-pattern1* row 0)
(dy enemy) (aref *enemy-move-pattern1* row 1)))
((80 81 82) ; id 80 81 82(purple)
(setf (dx enemy) (aref *enemy-move-pattern3* row 0)
(dy enemy) (aref *enemy-move-pattern3* row 1))))))
((50 52) ; id 50 52(blue)
(let((row (mod (move-cnt enemy) 12))) ; row from 0 to 11
(setf (dx enemy) (aref *enemy-move-pattern2* row 0)
(dy enemy) (aref *enemy-move-pattern2* row 1))))
((76 78) ; id 76 78 middle size enemy
(if (= (id enemy) 76)
(setf (dx enemy) (first *enemy-move-pattern4*)
(dy enemy) (second *enemy-move-pattern4*))
(setf (dx enemy) (first *enemy-move-pattern5*)
(dy enemy) (second *enemy-move-pattern5*))))
((70 71) ; id 70 71 large size enemy
(let((row (mod (move-cnt enemy) 32))) ; row from 0 to 31
(if (= (id enemy) 70)
(setf (dx enemy) (aref *enemy-move-pattern6* row 0)
(dy enemy) (aref *enemy-move-pattern6* row 1))
(setf (dx enemy) (aref *enemy-move-pattern7* row 0)
(dy enemy) (aref *enemy-move-pattern7* row 1)))))
((72) ; id 72 large size enemy
(setf (dx enemy) (first *enemy-move-pattern8*)
(dy enemy) (second *enemy-move-pattern8*))))
(incf (x enemy) (dx enemy))
(incf (y enemy) (dy enemy))
(incf (move-cnt enemy) 1)
(when (or (>= (y enemy) (height game-field)) ; bottom of game field
(>= (x enemy) (width game-field)) ; right of game field
(<= (x enemy) (- (field-x game-field) (* 32 (kind enemy))))) ; left of game field
(setf (state enemy) 0)))))
(defgeneric Change-id (enemy))
(defmethod Change-id (enemy)
(case (id enemy)
((7 8 9)
(case (mod (floor (move-cnt enemy) 4) 4) ; enemy id change
(0 (setf (id enemy) 7)) ; change pattern --> 0000, 1111 , 2222 , 3333
(1 (setf (id enemy) 8)) ; id7 , id8 , id9 , id8
(2 (setf (id enemy) 9))
(3 (setf (id enemy) 8))))
((50 52)
(case (mod (floor (move-cnt enemy) 2) 2) ; enemy id change
(0 (setf (id enemy) 50)) ; change pattern --> 0000, 1111
(1 (setf (id enemy) 52)))) ; id50 , id52
((80 81 82)
(case (mod (floor (move-cnt enemy) 4) 4) ; enemy id change
(0 (setf (id enemy) 80)) ; change pattern --> 0000, 1111 , 2222 , 3333
(1 (setf (id enemy) 81)) ; id80 , id81 , id82 , id81
(2 (setf (id enemy) 82))
(3 (setf (id enemy) 81))))))
(defgeneric Remove-enemy (enemy-manager))
(defmethod Remove-enemy (enemy-manager)
(setf (enemy-list enemy-manager)
(delete-if #'(lambda (enemy) (= (state enemy) 0)) (enemy-list enemy-manager))))
(defgeneric Enemy-draw (enemy-manager))
(defmethod Enemy-draw (enemy-manager)
(dolist (enemy (enemy-list enemy-manager))
(Change-id enemy)
(Draw enemy)))
(defun Scroll-counter ()
(incf *scroll-cnt*))
;; step1 <Game Frame>
;; -----------------------------------------------------------------------------------------------
(defun Common-abogadro ()
"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 "ABOGADRO"
:icon-caption "ABOGADRO"
:double-buffer t
:fullscreen nil)
; <Initialize>
(Initialize) ; graphics initialize
(let((enemy-manager (make-instance 'enemy-manager))
(game-field (make-instance 'game-field :field-x 160 :field-y 16 :width 480 :height 464)))
(sdl:update-display)
(sdl:with-events (:poll)
(:quit-event ()
t)
(:idle ()
; <Clear Display>
(sdl:clear-display sdl:*black*)
(Move-enemy enemy-manager game-field)
(Generate-enemy *enemy-map2* enemy-manager)
(Enemy-draw enemy-manager)
(Remove-enemy enemy-manager)
(Scroll-counter)
(sdl:update-display))))))
プログラムを実行すると、最後のキャラクタは円を描くように動く。
