インベーダの敵キャラは極めて統制の取れた軍隊だと気がついた、ユゲタです。
今回は、敵キャラを移動させて、ゲーム感MAXな状態にしたいと思います。
動いている敵キャラを見ると、はやくシューティングしたくて、うずうずしてきますよね。
本日のIT謎掛け
「モーションコントロール」と、かけまして・・・
「地下水質状態の危険性」と、ときます。
そのココロは・・・
イドー（移動と井戸）の状態を管理することが大事です。
ソースコード
(function(w,d){
var __options = {
canvas_size : { x : null , y : null },
bitmap_size : { w : 48 , h : 48},
cannon : {
type : "cannon",
color : "#57F2D6",
bitSize : 4,
src : "images/dot/cannon.dot",
x : 0 , y : 0,
moveX : 10
},
ufo : {
type : "ufo",
color : "white",
src : "images/dot/ufo.dot",
x : 0 , y : 0,
moveX : 10
},
bullet : {
type : "bullet",
color : "white",
src : "images/dot/bullet.dot",
x : 0 , y : 0,
moveX : 10
},
tochika : {
type : "tochika",
color : "red",
src : "images/dot/tochika.dot",
w : 72
},
invader_src : {
"crab" : [
'images/dot/crab_1.dot',
"images/dot/crab_2.dot"
],
"octpus" : [
"images/dot/octpus_1.dot",
"images/dot/octpus_2.dot"
],
"squid" : [
"images/dot/squid_1.dot",
"images/dot/squid_2.dot"
]
},
invader_row_infos : [
{ invader : "squid" , color : "#68F205"},
{ invader : "crab" , color : "#68F205"},
{ invader : "crab" , color : "#57F2D6"},
{ invader : "octpus", color : "#57F2D6"},
{ invader : "octpus", color : "#F22786"}
],
invader_config : {
type : "invader",
margin : 10, // display-margin
move_x : 4, // [1:right , -1:left]
move_y : 4
}
};
var MAIN = function(canvas_selector){
this.canvas_selector = canvas_selector || "canvas";
this.shoots = [];
this.pattern = 0;
this.setCanvas(this.canvas_selector);
this.set_imageMax();
this.event_set();
this.bitmap_load();
this.view();
this.animation_roop();
};
MAIN.prototype.setCanvas = function(selector){
this.canvas_elm = d.querySelector(selector);
if(!this.canvas_elm){return;}
this.canvas_elm.style.setProperty("background-color","black","");
if(w.innerWidth < this.canvas_elm.offsetWidth){
this.canvas_elm.setAttribute("width" , w.innerWidth);
}
if(w.innerHeight < this.canvas_elm.offsetHeight){
this.canvas_elm.setAttribute("height" , w.innerHeight);
}
__options.canvas_size.x = this.canvas_elm.offsetWidth;
__options.canvas_size.y = this.canvas_elm.offsetHeight;
__options.cannon.y = __options.canvas_size.y - 100;
// smooth-off
this.ctx = this.canvas_elm.getContext("2d");
this.ctx.imageSmoothingEnabled = false;
this.ctx.mozImageSmoothingEnabled = false;
this.ctx.webkitImageSmoothingEnabled = false;
this.ctx.msImageSmoothingEnabled = false;
};
MAIN.prototype.clear = function(){
this.ctx.clearRect(0, 0, this.canvas_elm.width, this.canvas_elm.height);
};
MAIN.prototype.bitmap_load = function(){
var bitmap_files = [];
for(var i in __options.invader_src){
for(var j=0; j<__options.invader_src[i].length; j++){
bitmap_files.push(__options.invader_src[i][j]);
}
}
for(var i=0; i<bitmap_files.length; i++){
this.image_bit_set(bitmap_files[i]);
}
this.image_bit_set(__options.cannon.src);
this.image_bit_set(__options.ufo.src);
this.image_bit_set(__options.bullet.src);
this.image_bit_set(__options.tochika.src , __options.tochika.w);
};
MAIN.prototype.view = function(){
// invader
this.view_invader();
// canon
this.image(__options.cannon);
// tochika
this.view_tochika();
}
MAIN.prototype.view_invader = function(){
if(typeof __options.invaders === "undefined"){
this.init_invaders_info();
}
for(var i in __options.invaders){
for(var j in __options.invaders[i]){
this.image(__options.invaders[i][j][this.pattern]);
}
}
};
MAIN.prototype.view_tochika = function(){
// 配置間隔
var rate = 2.5;
// 配置計算
var tochika_count = Math.floor(this.canvas_elm.offsetWidth / (__options.tochika.w * rate));
var margin = (this.canvas_elm.offsetWidth - ((__options.tochika.w * rate) * tochika_count)) / 2;
var centering = __options.tochika.w * (rate - 1) /2;
var y = this.canvas_elm.offsetHeight - 170;
for(var i=0; i<tochika_count; i++){
var x = margin + ((__options.tochika.w * rate) * i) + centering;
var option = JSON.parse(JSON.stringify(__options.tochika));
option.x = x;
option.y = y;
this.image(option);
}
};
MAIN.prototype.init_invaders_info = function(){
// 配置マージン
margin = __options.invader_config.margin;
// 配置個数（w）
var count_w = Math.floor((__options.canvas_size.x - margin * 2) / __options.bitmap_size.w) -2;
// 敵機配置情報作成
__options.invaders = [];
for(var i=0; i<__options.invader_row_infos.length; i++){
var type = __options.invader_row_infos[i].invader;
__options.invaders[i] = [];
var srcs = __options.invader_src[type];
for(var j=0; j<count_w; j++){
__options.invaders[i][j] = [];
for(var k=0; k<srcs.length; k++){
__options.invaders[i][j][k] = {
color : __options.invader_row_infos[i].color,
x : (j * __options.bitmap_size.w) + margin,
y : (i * __options.bitmap_size.h) + margin,
type : type,
src : srcs[k]
};
}
}
}
};
MAIN.prototype.image_cache = [];
MAIN.prototype.image = function(options){
if(!this.canvas_elm){return;}
if(!options){return;}
if(typeof this.image_cache[options.src] !== "undefined"){
this.image_bit_make(options);
}
};
MAIN.prototype.image_bit_set = function(src , bitmap_size){
if(typeof this.image_cache[src] !== "undefined"){return;}
bitmap_size = bitmap_size || __options.bitmap_size.w;
this.image_cache[src] = {
bitsize : 0,
bitmap : []
};
new AJAX({
url : src,
methdo : "GET",
async : true,
onSuccess : (function(src , bitmap_size , data){
this.image_bit_loaded(src , bitmap_size , data);
}).bind(this , src , bitmap_size)
});
};
MAIN.prototype.image_bit_loaded = function(src , bitmap_size , data){
var char16 = data.split("\n");
var str_count = char16[0].length * 4;
var size = bitmap_size / str_count;
// ゼロパディング用桁数算出
var zero = new Array(str_count).fill("0").join("")
for(var i in char16){
// 16進数を２進数に変換
var char2 = parseInt(char16[i] , 16).toString(2);
// サイズ取得
this.image_cache[src].bitsize = size;
char2 = (zero + char2).slice(-str_count);
this.image_cache[src].bitmap.push(char2);
}
};
MAIN.prototype.image_bit_make = function(options){
if(typeof this.image_cache[options.src] === "undefined"
|| typeof this.image_cache[options.src].bitmap === "undefined"
|| typeof this.image_cache[options.src].bitsize === "undefined"){return;}
var bitmap = this.image_cache[options.src].bitmap;
var bitsize = this.image_cache[options.src].bitsize;
this.ctx.fillStyle = options.color;
for(var i=0; i<bitmap.length; i++){
for(var j=0; j<bitmap[i].length; j++){
var bit = bitmap[i].charAt(j);
if(bit == 0){continue;}
var w = bitsize;
var h = bitsize;
var x = options.x + (j * w);
var y = options.y + (i * h);
this.ctx.fillRect(x , y , Math.ceil(w) , Math.ceil(h));
}
}
};
MAIN.prototype.animation_roop = function(time){
var func = (function(e){this.animation(e)}).bind(this);
this.animation_proc();
if(window.requestAnimationFrame
|| window.webkitRequestAnimationFrame
|| window.mozRequestAnimationFrame
|| window.oRequestAnimationFrame
|| window.msRequestAnimationFrame){
window.requestAnimationFrame(func);
}
else{
time = time || 10;
anim_flg = setTimeout(func , time);
}
};
MAIN.prototype.animation_proc = function(){
switch(this.keydown_flg){
case "right":
this.cannon_move(__options.cannon.x + __options.cannon.moveX);
break;
case "left":
this.cannon_move(__options.cannon.x - __options.cannon.moveX);
break;
}
this.animation_shoot();
};
MAIN.prototype.animation_shoot = function(){
if(!this.shoots.length){return;}
for(var i in this.shoots){
var w = 1 * __options.cannon.bitSize;
var h = 2 * __options.cannon.bitSize;
if(this.shoots[i].y < h){
this.shoots.splice(i,1);
}
else{
this.ctx.fillStyle = "white";
this.ctx.fillRect(this.shoots[i].x - __options.cannon.bitSize , this.shoots[i].y , w , h);
this.shoots[i].y -= __options.cannon.bitSize * 2;
}
}
};
MAIN.prototype.cannon_move = function(pos){
if(pos < 0){
pos = 0;
}
else if(pos > this.canvas_elm.offsetWidth - __options.bitmap_size.w){
pos = this.canvas_elm.offsetWidth - __options.bitmap_size.w;
}
__options.cannon.x = pos;
};
MAIN.prototype.animation = function(){
this.clear();
this.nextPattern(300);
this.view();
this.animation_roop(30);
}
MAIN.prototype.nextPattern = function(frame_rate){
this.prev_time = this.prev_time || 0;
if((+new Date()) - this.prev_time < frame_rate){return}
this.prev_time = (+new Date());
this.pattern++;
if(this.pattern >= this.image_max){
this.pattern = 0;
}
this.invader_move();
};
MAIN.prototype.invader_move = function(){
// 左端の情報取得
var window_min = __options.invader_config.margin;
var window_max = this.canvas_elm.offsetWidth - __options.invader_config.margin;
var pos = this.invader_pos();
var move_x = __options.invader_config.move_x;
var move_y = 0;
var w = __options.bitmap_size.w;
// move y
if(typeof this.move_y_count !== "undefined" && this.move_y_count > 0){
this.move_y_count -= 1;
move_y = __options.invader_config.move_y;
move_x = 0;
}
// Dead end ->
else if(move_x > 0 && pos.max > window_max){
// move_x = window_max - pos.max;
this.move_y_count = 1;
__options.invader_config.move_x = -__options.invader_config.move_x;
move_x = 0;
move_y = __options.invader_config.move_y;
}
// <- Dead end
else if(move_x < 0 && pos.min < window_min){
// move_x = window_min - pos.min;
this.move_y_count = 1;
__options.invader_config.move_x = -__options.invader_config.move_x;
move_x = 0;
move_y = __options.invader_config.move_y;
}
this.invader_move_set(move_x , move_y);
};
// mode @ [min : 一番左端のinvaderの座標を取得 . max : 一番右端のinvaderの座標を取得]
MAIN.prototype.invader_pos = function(mode){
var min = null;
var max = null;
var inv = __options.invaders;
var w = __options.bitmap_size.w;
for(var i in inv){
for(var j in inv[i]){
if(min === null || min > inv[i][j][0].x){
min = inv[i][j][0].x;
}
if(max === null || max < inv[i][j][0].x + w){
max = inv[i][j][0].x + w;
}
}
}
if(mode === "min"){
return min;
}
else if(mode === "max"){
return max;
}
else{
return {min : min , max : max};
}
};
MAIN.prototype.invader_move_set = function(x,y){
var inv = __options.invaders;
var w = __options.bitmap_size.w;
for(var i in inv){
for(var j in inv[i]){
for(var k in inv[i][j]){
inv[i][j][k].x += x;
inv[i][j][k].y += y;
}
}
}
};
MAIN.prototype.set_imageMax = function(){
for(var i in __options.invader_src){
this.image_max = __options.invader_src[i].length;
break;
}
};
/* Event */
MAIN.prototype.event_set = function(){
new LIB().event(w , "click" , (function(e){this.click(e)}).bind(this));
new LIB().event(w , "keydown" , (function(e){this.keydown(e)}).bind(this));
new LIB().event(w , "keyup" , (function(e){this.keyup(e)}).bind(this));
new LIB().event(w , "mousemove" , (function(e){this.mousemove(e)}).bind(this));
new LIB().event(w , "touchmove" , (function(e){this.touchmove(e)}).bind(this));
new LIB().event(w , "touchend" , (function(e){this.touchend(e)}).bind(this));
};
MAIN.prototype.click = function(e){
this.shoot_add();
};
MAIN.prototype.shoot_add = function(){
if(this.shoots.length < 2){
this.shoots.push({
x : __options.cannon.x + (__options.bitmap_size.w / 2),
y : __options.cannon.y + (__options.cannon.bitSize * 4)
});
}
};
MAIN.prototype.keydown = function(e){
switch(e.keyCode){
case 37: // <-
case 'ArrowLeft':
this.keydown_flg = "left";
break;
case 39: // ->
case 'ArrowRight':
this.keydown_flg = "right";
break;
case 32: // space
this.shoot_add();
break;
}
};
MAIN.prototype.keyup = function(e){
this.keydown_flg = false;
};
MAIN.prototype.mousemove = function(e){
// if(this.flg_gamestart !== true){return;}
this.mousePos = this.mousePos || e.clientX;
this.cannon_move(__options.cannon.x + (e.clientX - this.mousePos));
this.mousePos = e.clientX;
};
MAIN.prototype.touchmove = function(e){
// if(this.flg_gamestart !== true){return;}
if(!e || !e.touches || e.touches.length > 1){
this.mousePos = null;
return;
}
this.mousePos = typeof this.mousePos === "number" ? this.mousePos : e.touches[0].clientX;
this.cannon_move(__options.cannon.x + (e.touches[0].clientX - this.mousePos));
this.mousePos = e.touches[0].clientX;
};
MAIN.prototype.touchend = function(e){
this.mousePos = null;
};
var LIB = function(){};
LIB.prototype.event = function(target, mode, func , flg){
flg = (flg) ? flg : false;
if (target.addEventListener){target.addEventListener(mode, func, flg)}
else{target.attachEvent('on' + mode, function(){func.call(target , window.event)})}
};
var AJAX = function(option){
if(!option){return}
var httpoj = this.createHttpRequest();
if(!httpoj){return;}
// var option = new MAIN().setOption(options);
var data = this.setQuery(option);
if(!data.length){
option.method = "get";
}
httpoj.open( option.method , option.url , option.async );
httpoj.setRequestHeader('Content-Type', option.type);
httpoj.onreadystatechange = function(){
if (this.readyState==4 && httpoj.status == 200){
option.onSuccess(this.responseText);
}
};
// FormData 送信用
if(typeof option.form === "object" && Object.keys(option.form).length){
httpoj.send(option.form);
}
// query整形後 送信
else{
if(data.length){
httpoj.send(data.join("&"));
}
else{
httpoj.send();
}
}
};
AJAX.prototype.dataOption = {
url:"",
query:{},
querys:[],
data:{},
form:{},
async:"true",
method:"POST",
type:"application/x-www-form-urlencoded",
onSuccess:function(res){},
onError:function(res){}
};
AJAX.prototype.createHttpRequest = function(){
//Win ie用
if(window.ActiveXObject){
//MSXML2以降用;
try{return new ActiveXObject("Msxml2.XMLHTTP")}
catch(e){
//旧MSXML用;
try{return new ActiveXObject("Microsoft.XMLHTTP")}
catch(e2){return null}
}
}
//Win ie以外のXMLHttpRequestオブジェクト実装ブラウザ用;
else if(window.XMLHttpRequest){return new XMLHttpRequest()}
else{return null}
};
// URL-Queryの作成
AJAX.prototype.setQuery = function(option){
var data = [];
if(typeof option.datas !== "undefined"){
for(var key of option.datas.keys()){
data.push(key + "=" + option.datas.get(key));
}
}
if(typeof option.query !== "undefined"){
for(var i in option.query){
data.push(i+"="+encodeURIComponent(option.query[i]));
}
}
if(typeof option.querys !== "undefined"){
for(var i=0;i<option.querys.length;i++){
if(typeof option.querys[i] == "Array"){
data.push(option.querys[i][0]+"="+encodeURIComponent(option.querys[i][1]));
}
else{
var sp = option.querys[i].split("=");
data.push(sp[0]+"="+encodeURIComponent(sp[1]));
}
}
}
return data;
}
new LIB().event(w , "load" , function(){new MAIN("#mycanvas")});
})(window,document);
解説
今回のは、敵キャラ移動用の関数をいくつか作りました。
関数 : invader_move
この関数は、敵キャラがアニメーションする時に呼び出される関数で、移動する方向や、端に行った時に、折返しをする処理をします。
折返しをする時に、数パターンY軸（縦）にも移動して、インベーダーが迫ってくる処理をしています。
関数 : invader_pos
たくさんいるインベーダが画面の端にいったかどうかの座標判定をする用の座標を取得しています。
ゲームの特性として、すべてのインベーダの座標をチェックしなければいけないので、少し無駄に感じますが、敵キャラをやっつけていって数が少なくなっていくと、処理自体が少なくなってくるので、その昔インベーダーゲームをやっていて、敵キャラが減ると、敵の動きが早くなるのは、こうした処理をして、処理スピードが上がっていたんだとなんとなく想像できました。
非常によく考えられたプログラムと、感動すらしますね。
関数 : invader_move_set
実際の移動処理は、この関数で行っていますが、表示をするときのためのメモリに持っている座標の値を行進しています。
Github
ソースは以下にアップしています。(ver:0.7)
https://github.com/yugeta/game_invader
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