ゲームライブラリ構築までの道 #7「ブロック崩し編」

Posted on 2020/07/10 by 下駄

Pocket

Check

こんにちわ。

自分の作りたいものが好きに作れる事に幸せを感じる、下駄です。

プログラミングで、人から「こんなの作れる？」と聞かれたら、すぐにその要件のモノを作ることができると、

仕事としても、信頼されて依頼されるようになります。

自分としても、言われることで人の役に立つ成果物が作れるというモチベーションと、

自分の知らなかった知識が必ず何かしら存在するので、確実にスキルアップできるという点で、

エンジニアという職業は、やればやるほど、成長していくものだと、感じますね。

でも、このブログは誰からも言われていなくて、自分で研究しているだけのブログですが、今日もブロック崩し、作っちゃいますよ。

本日のIT謎掛け

「プログラミングのスキルアップ」と、かけまして、

「旅行先の山道でドライブ」と、ときます。

そのココロは・・・

未知の領域に進んでいくことで、素早く到達します。

ソースコード

(function(){

  var __options = {
    canvas : "#mycanvas",
    width  : 400,
    height : 600,
    wall   : {
      w : 400 , h : 600 , 
      color_stroke : "transparent" , 
      color_fill : "#382B8C" , 
      size : 20
    },
    ball   : {
      x :  50 , y :  50 , r : 6,
      color_stroke : "transparent",
      color_fill : "#F2B5A7" , 
      moveX : 4 , 
      moveY : 4
    },
    bar    : { 
      w :  60 , h :  10 , 
      color_stroke : "transparent" , 
      color_fill : "#958ABF" , 
      moveX : 12 
    },
    dialog : {
      color_fill   : "white",
      color_stroke : "#382B8C",
      width_stroke : 2,
      text_color   : "#382B8C",
      text_size    : 16,
      text_width   : 0.9,
      text_font    : "sans-serif",
      radius       : 4,
      w            : 0.7,
      h            : 0.3
    },
    block : {
      w : 50 , h : 15 ,
      color_stroke : "transform",
      color_fill   : "#958ABF",
      row : 6,
      col : 6,
      gap_x        : 5,
      gap_y        : 10,
      margin_top   : 59,
      margin_left  : 15,
      area_y       : 0.4,
      collision_col : "red"
    }
  };

  var MAIN = function(){

    if(!this.check()){
      alert("htmlに指定のcanvasがありません。");
      return;
    }

    this.init();
    this.draw(true);
    this.animation_set();
    this.event_set();

    this.game_start();
  };

  MAIN.prototype.init = function(){

    this.data_reset();

    // 画面サイズ調整
    var canvas = this.canvas;
    canvas.setAttribute("width"  , this.options.wall.w);
    canvas.setAttribute("height" , this.options.wall.h);

  };

  MAIN.prototype.dialog_window = function(o){
    var w = o.wall.w * o.dialog.w,
        h = o.wall.h * o.dialog.h,
        x = o.wall.w / 2 * (1 - o.dialog.w),
        y = o.wall.w / 2 * (1 - o.dialog.h),
        r = o.dialog.radius;
    h = h > 180 ? h : 180;
    this.ctx.fillStyle   = o.dialog.color_fill;
    this.ctx.strokeStyle = o.dialog.color_stroke;
    this.ctx.lineWidth   = o.dialog.width_stroke * 2;
    this.ctx.beginPath();
    this.ctx.moveTo(x,y + r);
    this.ctx.arc(x+r , y+h-r , r , Math.PI , Math.PI*0.5 , true);
    this.ctx.arc(x+w-r , y+h-r , r , Math.PI*0.5,0 , 1);
    this.ctx.arc(x+w-r , y+r , r , 0 , Math.PI*1.5 , 1);
    this.ctx.arc(x+r , y+r , r , Math.PI*1.5 , Math.PI , 1);   
    this.ctx.closePath();
    this.ctx.stroke();
    this.ctx.fill();
  }
  MAIN.prototype.dialog_text = function(o , texts){
    var w = (o.wall.w * o.dialog.w) * o.dialog.text_width;
    
    
    var x = o.wall.w / 2;
    var y = o.wall.w / 2 * (1 - o.dialog.h) + 30;
    var text_y = y;

    for(var i=0; i<texts.length; i++){
      this.ctx.fillStyle    = texts[i].color    || o.dialog.text_color;
      this.ctx.textAlign    = texts[i].align    || "center";
      this.ctx.textBaseline = texts[i].baseline || "top";
      var font_size         = texts[i].size || o.dialog.text_size;
      var font_weight       = texts[i].weight || "";
      this.ctx.font         = font_weight +" "+ font_size+"px '"+ o.dialog.text_font +"' ";
      this.ctx.fillText(texts[i].text , x, text_y , w);
      text_y += font_size + (texts[i].margin || 10);
    }
  };

  MAIN.prototype.game_start = function(){
    this.dialog_window(this.options);
    this.dialog_text(this.options , [
      {text:"壁打ちブロック" , size:30 , margin:30 , weight:"bold"},
      {text:"画面をクリックすると"},
      {text:"ゲームが開始します"}
    ]);
  };

  MAIN.prototype.game_over = function(){
    this.flg_gamestart = false;
    this.data_reset();
    this.dialog_window(this.options);
    this.dialog_text(this.options , [
      {text:"Game over", size:30 , margin:30 , color:"red" , weight:"bold"},
      {text:"画面をクリックすると"},
      {text:"ゲームが開始します"}
    ]);
  };

  MAIN.prototype.data_reset = function(){
    this.options = JSON.parse(JSON.stringify(__options));
    // 画面サイズ調整
    this.options.wall.w = window.innerWidth  < this.options.wall.w ? window.innerWidth  : this.options.wall.w;
    this.options.wall.h = window.innerHeight < this.options.wall.h ? window.innerHeight : this.options.wall.h;
    
    // blockサイズ調整
    var w = this.options.wall.w - (this.options.wall.size*2) - this.options.block.margin_left;
    this.options.block.col = Math.round(w / (this.options.block.w + (this.options.block.gap_x * 2)));
    this.options.block.margin_left = (w - (this.options.block.col * this.options.block.w) - this.options.block.gap_x) * 0.5;

    this.options.wall.margin_top = (this.options.wall.h - this.options.wall.size) * 0.1;
    var h = (this.options.wall.h - this.options.wall.size - this.options.wall.margin_top) * this.options.block.area_y;
    this.options.block.row = Math.round(h / (this.options.block.h + this.options.block.gap_y));

    // ボール初期値（画面の中心地）
    this.options.ball.x = this.options.wall.w * 0.5;
    this.options.ball.y = this.options.wall.h * 0.5;
  };


  MAIN.prototype.getCanvas = function(){
    if(typeof this.canvas === "undefined"){
      this.canvas = document.querySelector(__options.canvas);
    }
    return this.canvas;
  };

  MAIN.prototype.getContext = function(){
    if(typeof this.ctx === "undefined"){
      var canvas = this.getCanvas();
      if(!canvas){return null;}
      this.ctx = canvas.getContext("2d");
    }
    return this.ctx;
  };

  MAIN.prototype.check = function(){
    var ctx = this.getContext();
    if(ctx){
      return true;
    }
    else{
      return false;
    }
  };

  MAIN.prototype.ctx_clear = function(){
    this.ctx.clearRect(0, 0,  this.canvas.width,  this.canvas.height);
  };

  MAIN.prototype.draw = function(flg){
    if(!flg && this.flg_gamestart !== true){return;}
    this.ctx_clear();
    this.draw_wall(this.options.wall);
    this.draw_bar( this.options.wall , this.options.bar);
    this.draw_ball(this.options.wall , this.options.ball);
    this.draw_block(this.options.wall , this.options.block);
  };

  MAIN.prototype.draw_wall = function(ow){
    var ctx = this.ctx;
    ctx.strokeStyle = ow.color_stroke;
    ctx.strokeWidth = ow.color_stroke === "transparent" ? 0 : 1;
    ctx.fillStyle   = ow.color_fill;
    ctx.beginPath();
    ctx.moveTo(0,0);
    ctx.lineTo(ow.w , 0);
    ctx.lineTo(ow.w , ow.h);
    ctx.lineTo(ow.w - ow.size , ow.h);
    ctx.lineTo(ow.w - ow.size , ow.size);
    ctx.lineTo(ow.size , ow.size);
    ctx.lineTo(ow.size , ow.h);
    ctx.lineTo(0 , ow.h);
    ctx.lineTo(0 , 0);
    ctx.stroke();
    ctx.fill();
  };

  MAIN.prototype.draw_bar = function(ow,ob){
    this.ctx.strokeStyle = ob.color_stroke;
    this.ctx.strokeWidth = ob.color_stroke === "transparent" ? 0 : 1;
    this.ctx.fillStyle   = ob.color_fill;
    ob.x = ob.x ? ob.x : (ow.w - ob.w) / 2;
    ob.y = ow.h - ob.h - 50;
    this.ctx.fillRect(ob.x , ob.y , ob.w , ob.h);
  };

  MAIN.prototype.draw_ball = function(ow,ob){
    this.ctx.strokeStyle = ob.color_stroke;
    this.ctx.strokeWidth = ob.color_stroke === "transparent" ? 0 : 1;
    this.ctx.fillStyle   = ob.color_fill;
    this.ctx.beginPath();
    ob.x = ob.x || ow.w / 2;
    ob.y = ob.y || ow.h / 2;
    this.ctx.arc( ob.x , ob.y , ob.r, 0, Math.PI * 2 );
    this.ctx.fill();
  };

  MAIN.prototype.draw_block = function(wall , block){
    this.ctx.strokeStyle = block.color_stroke;
    this.ctx.strokeWidth = block.color_stroke === "transparent" ? 0 : 1;
    this.ctx.fillStyle   = block.color_fill;
    var buffer = [];
    for(var i=0; i<block.row; i++){
      if(typeof buffer[i] === "undefined"){buffer[i] = [];}
      for(var j=0; j<block.col; j++){

        var x = block.margin_left + wall.size + (block.w * j) + (block.gap_x * j);
        var y = block.margin_top  + wall.size + (block.h * i) + (block.gap_y * i);

        if(typeof block.buffer === "undefined"){
          buffer[i][j] = {x : x , y : y};
          this.ctx.fillRect(x , y , block.w , block.h);
        }
        else if(block.buffer[i][j].collision === true){
          continue;
          // this.ctx.fillStyle   = block.collision_col;
          // this.ctx.fillRect(x , y , block.w , block.h);
          // this.ctx.fillStyle   = block.color_fill;
        }
        else{
          this.ctx.fillRect(x , y , block.w , block.h);
        }
        
        
        
        
        // if(typeof block.buffer === "undefined"){
        //   buffer[i][j] = {x : x , y : y};
        //   this.ctx.fillRect(x , y , block.w , block.h);
        // }
        // else if(typeof block.buffer !== "undefined"
        // && typeof block.buffer[j] !== "undefined"
        // && block.buffer[j][i]){
        //   this.ctx.fillRect(x , y , block.w , block.h);
        // }
      }
    }
    if(typeof block.buffer === "undefined"){
      block.buffer = buffer;
    }
  };

  MAIN.prototype.animation_set = function(){
    if(this.flg_gamestart !== true){return;}
    new LIB().anim((function(e){this.animation(e)}).bind(this));
  };

  MAIN.prototype.animation = function(timestamp){
    if(this.flg_gamestart !== true){return;}
    if (!this.time_start){this.time_start = timestamp;}

    // debug用（play上限秒数）
    // if(timestamp - this.time_start > 30000){return;}

    // keydown-bar-move
    switch(this.keydown_flg){
      case "right":
        this.bar_move(this.options.bar.x + this.options.bar.moveX);
        break;
      case "left":
        this.bar_move(this.options.bar.x - this.options.bar.moveX);
        break;
    }

    this.ball_move();
    this.draw();
    this.animation_set();
  };

  MAIN.prototype.ball_move = function(){
    if(this.flg_gamestart !== true){return;}
    
    this.options.ball.x += this.options.ball.moveX;
    this.options.ball.y += this.options.ball.moveY;
    this.collision_wall(this.options.wall , this.options.ball);
    this.collision_bar(this.options.bar , this.options.ball);
    this.collision_block(this.options.block , this.options.ball);
  };

  // 当たり判定（壁）
  MAIN.prototype.collision_wall = function(ow , ob){
    // <- : left
    if(ob.x - ob.r < ow.size){
      ob.x     = ow.size + ob.r;
      ob.moveX = ob.moveX * -1;
    }
    // ^ : top
    if(ob.y - ob.r < ow.size){
      ob.y     = ow.size + ob.r;
      ob.moveY = ob.moveY * -1;
    }
    // -> : right
    if(ob.x + ob.r > ow.w - ow.size){
      ob.x     = ow.w - ow.size - ob.r;
      ob.moveX = ob.moveX * -1;
    }

    // v : bottom (game-over)
    if(ob.y + ob.r > ow.h){
      this.game_over();
    }
  }

  // 当たり判定（ラケット）
  MAIN.prototype.collision_bar = function(bar , ball){

    // ボールが上移動の場合は処理対象外
    if(ball.moveY < 0){return;}

    // ball-direct-under (正反射)
    if(ball.y + ball.r > bar.y
    && ball.y + ball.r < bar.y + bar.h
    && ball.x > bar.x
    && ball.x < bar.x + bar.w){
      ball.moveY = ball.moveY * -1;
    }

    // 左角判定（ボールと角との距離がボール半径以下の判定）
    else if(Math.sqrt(Math.pow(bar.x - ball.x, 2) + Math.pow(bar.y - ball.y, 2)) <= ball.r){
      if(ball.moveX > 0){
        this.calc_angle(bar , ball);
      }
      else{
        ball.moveY = ball.moveY * -1;
      }
    }

    // 右角判定（ボールと角との距離がボール半径以下の判定）
    else if(Math.sqrt(Math.pow((bar.x + bar.w) - ball.x, 2) + Math.pow(bar.y - ball.y, 2)) <= ball.r){
      if(ball.moveX < 0){
        this.calc_angle(bar , ball);
      }
      else{
        ball.moveY = ball.moveY * -1;
      }
    }
  };
  // 当たり判定（ブロック）
  MAIN.prototype.collision_block = function(block , ball){
    if(typeof block.buffer === "undefined"){return;}
    for(var i=0; i<block.row; i++){
      if(typeof block.buffer[i] === "undefined"){continue;}
      for(var j=0; j<block.col; j++){

        if(!block.buffer
        || typeof block.buffer[i][j] === "undefined"
        || !block.buffer[i][j]
        || block.buffer[i][j].collision === true){continue;}

        // 左右正反射
        if(ball.x + ball.r > block.buffer[i][j].x
        && ball.x - ball.r < block.buffer[i][j].x + block.h
        && ball.y > block.buffer[i][j].y
        && ball.y < block.buffer[i][j].y + block.h){
          block.buffer[i][j].collision = true;
          // ボール座標を調整
          if(ball.moveX < 0){
            ball.x = block.buffer[i][j].x + block.w + ball.r;
          }
          else{
            ball.x = block.buffer[i][j].x - ball.r;
          }
          // 方向転換
          ball.moveX = ball.moveX * -1;
          return;
        }

        // 上下正反射
        if(ball.y + ball.r > block.buffer[i][j].y
        && ball.y - ball.r < block.buffer[i][j].y + block.h
        && ball.x > block.buffer[i][j].x
        && ball.x < block.buffer[i][j].x + block.w){
          block.buffer[i][j].collision = true;
          // ボール座標を調整
          if(ball.moveY < 0){
            ball.y = block.buffer[i][j].y + block.h + ball.r;
          }
          else{
            ball.y = block.buffer[i][j].y - ball.r;
          }
          // 方向転換
          ball.moveY = ball.moveY * -1;
          return;
        }

        // 左上角判定
        else if(Math.pow(block.buffer[i][j].x - ball.x, 2) + Math.pow(block.buffer[i][j].y - ball.y, 2) <= ball.r){
          block.buffer[i][j].collision = true;
          if(ball.moveX > 0 && ball.moveY > 0){
            ball.moveX = ball.moveX * -1;
            ball.moveY = ball.moveY * -1;
          }
          else if(ball.moveX < 0 && ball.moveY > 0){
            ball.moveY = ball.moveY * -1;
          }
          else if(ball.moveX > 0 && ball.moveY < 0){
            ball.moveX = ball.moveX * -1;
          }
          return;
        }
        // 右上角判定
        else if(Math.sqrt(ball.x - block.buffer[i][j].x - block.w, 2) + Math.pow(block.buffer[i][j].y - ball.y, 2) <= ball.r){
          block.buffer[i][j].collision = true;
          if(ball.moveX < 0 && ball.moveY > 0){
            ball.moveX = ball.moveX * -1;
            ball.moveY = ball.moveY * -1;
          }
          else if(ball.moveX > 0 && ball.moveY > 0){
            ball.moveY = ball.moveY * -1;
          }
          else if(ball.moveX < 0 && ball.moveY < 0){
            ball.moveX = ball.moveX * -1;
          }
          return;
        }
        // 左下角判定
        else if(Math.sqrt(block.buffer[i][j].x - ball.x, 2) + Math.pow(ball.y - block.buffer[i][j].y + block.h , 2) <= ball.r){
          block.buffer[i][j].collision = true;
          if(ball.moveX > 0 && ball.moveY < 0){
            ball.moveX = ball.moveX * -1;
            ball.moveY = ball.moveY * -1;
          }
          else if(ball.moveX < 0 && ball.moveY < 0){
            ball.moveY = ball.moveY * -1;
          }
          else if(ball.moveX > 0 && ball.moveY > 0){
            ball.moveX = ball.moveX * -1;
          }
          return;
        }
        // 右下角判定
        else if(Math.sqrt(ball.x - block.buffer[i][j].x - block.w, 2) + Math.pow(ball.y - block.buffer[i][j].y + block.h , 2) <= ball.r){
          block.buffer[i][j].collision = true;
          if(ball.moveX < 0 && ball.moveY < 0){
            ball.moveX = ball.moveX * -1;
            ball.moveY = ball.moveY * -1;
          }
          else if(ball.moveX > 0 && ball.moveY < 0){
            ball.moveY = ball.moveY * -1;
          }
          else if(ball.moveX < 0 && ball.moveY > 0){
            ball.moveX = ball.moveX * -1;
          }
          return;
        }

      }
    }
  }

  MAIN.prototype.calc_angle = function(bar,ball){
    // // 現在のボールの進行角度
    // var angle1 = Math.atan2(Math.abs(ball.moveY) , Math.abs(ball.moveX)) * 180 / Math.PI;
    // // 角座標とボール中心地の角度
    // var angle2 = Math.atan2(bar.y - ball.y , bar.x - ball.x) * 180 / Math.PI;
    // // 誤差角度を反転
    // angle1 += -(angle1 - angle2);
    // // 角度を反映
    // ball.moveY = Math.sin(angle1) * ball.r;
    // ball.moveX = Math.cos(angle1) * ball.r;

    // 反転
    ball.moveX = -ball.moveX;
    ball.moveY = -ball.moveY;

    // console.log(angle1 +":"+ ball.moveX +"/"+ ball.moveY);
    // console.log(angle1 +"/"+ angle2 +":"+Math.abs(ball.moveY)+"/"+Math.abs(ball.moveX));
  };


  MAIN.prototype.event_set = function(){
    new LIB().event(window , "click"      , (function(e){this.click(e)}).bind(this));
    new LIB().event(window , "keydown"    , (function(e){this.keydown(e)}).bind(this));
    new LIB().event(window , "keyup"      , (function(e){this.keyup(e)}).bind(this));
    new LIB().event(window , "mousemove"  , (function(e){this.mousemove(e)}).bind(this));
    new LIB().event(window , "touchmove"  , (function(e){this.touchmove(e)}).bind(this));
    new LIB().event(window , "touchend"   , (function(e){this.touchend(e)}).bind(this));
  };

  MAIN.prototype.click = function(e){
    if(this.flg_gamestart === true){return}
    this.flg_gamestart = true;
    this.animation_set();
  };

  MAIN.prototype.bar_move = function(bar_x){
    if(bar_x < this.options.wall.size){
      bar_x = this.options.wall.size;
    }
    if(bar_x + this.options.bar.w > this.options.wall.w - this.options.wall.size){
      bar_x = this.options.wall.w - this.options.wall.size - this.options.bar.w;
    }
    this.options.bar.x = bar_x;
  };

  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;
    }
  };
  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.bar_move(this.options.bar.x + (e.clientX - this.mousePos));
    this.mousePos = e.clientX;

    this.draw();
  };

  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.bar_move(this.options.bar.x + (e.touches[0].clientX - this.mousePos));
    this.mousePos = e.touches[0].clientX;

    this.draw();
  };
  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)})}
  };

  LIB.prototype.anim = function(func , time){
    if(window.requestAnimationFrame
    ||  window.webkitRequestAnimationFrame
    ||  window.mozRequestAnimationFrame
    ||  window.oRequestAnimationFrame
    ||  window.msRequestAnimationFrame){
      window.requestAnimationFrame(func);
    }
    else{
      time = time || 0;
      anim_flg = setTimeout(func , time);
    }
  };


  LIB.prototype.construct = function(){
    switch(document.readyState){
      case "complete"    : new MAIN();break;
      case "interactive" : this.event(window , "DOMContentLoaded" , (function(){new MAIN()}).bind(this));break;
      default            : this.event(window , "load"             , (function(){new MAIN()}).bind(this));break;
    }
  };

  new LIB().construct();
})();

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(function(){

var __options = {

canvas : "#mycanvas",

width : 400,

height : 600,

wall : {

w : 400 , h : 600 ,

color_stroke : "transparent" ,

color_fill : "#382B8C" ,

size : 20

ball : {

x : 50 , y : 50 , r : 6,

color_stroke : "transparent",

color_fill : "#F2B5A7" ,

moveX : 4 ,

moveY : 4

bar : {

w : 60 , h : 10 ,

color_stroke : "transparent" ,

color_fill : "#958ABF" ,

moveX : 12

dialog : {

color_fill : "white",

color_stroke : "#382B8C",

width_stroke : 2,

text_color : "#382B8C",

text_size : 16,

text_width : 0.9,

text_font : "sans-serif",

radius : 4,

w : 0.7,

h : 0.3

block : {

w : 50 , h : 15 ,

color_stroke : "transform",

color_fill : "#958ABF",

row : 6,

col : 6,

gap_x : 5,

gap_y : 10,

margin_top : 59,

margin_left : 15,

area_y : 0.4,

collision_col : "red"

}

};

var MAIN = function(){

if(!this.check()){

alert("htmlに指定のcanvasがありません。");

return;

}

this.init();

this.draw(true);

this.animation_set();

this.event_set();

this.game_start();

};

MAIN.prototype.init = function(){

this.data_reset();

// 画面サイズ調整

var canvas = this.canvas;

canvas.setAttribute("width" , this.options.wall.w);

canvas.setAttribute("height" , this.options.wall.h);

};

MAIN.prototype.dialog_window = function(o){

var w = o.wall.w * o.dialog.w,

h = o.wall.h * o.dialog.h,

x = o.wall.w / 2 * (1 - o.dialog.w),

y = o.wall.w / 2 * (1 - o.dialog.h),

r = o.dialog.radius;

h = h > 180 ? h : 180;

this.ctx.fillStyle = o.dialog.color_fill;

this.ctx.strokeStyle = o.dialog.color_stroke;

this.ctx.lineWidth = o.dialog.width_stroke * 2;

this.ctx.beginPath();

this.ctx.moveTo(x,y + r);

this.ctx.arc(x+r , y+h-r , r , Math.PI , Math.PI*0.5 , true);

this.ctx.arc(x+w-r , y+h-r , r , Math.PI*0.5,0 , 1);

this.ctx.arc(x+w-r , y+r , r , 0 , Math.PI*1.5 , 1);

this.ctx.arc(x+r , y+r , r , Math.PI*1.5 , Math.PI , 1);

this.ctx.closePath();

this.ctx.stroke();

this.ctx.fill();

}

MAIN.prototype.dialog_text = function(o , texts){

var w = (o.wall.w * o.dialog.w) * o.dialog.text_width;

var x = o.wall.w / 2;

var y = o.wall.w / 2 * (1 - o.dialog.h) + 30;

var text_y = y;

for(var i=0; i<texts.length; i++){

this.ctx.fillStyle = texts[i].color || o.dialog.text_color;

this.ctx.textAlign = texts[i].align || "center";

this.ctx.textBaseline = texts[i].baseline || "top";

var font_size = texts[i].size || o.dialog.text_size;

var font_weight = texts[i].weight || "";

this.ctx.font = font_weight +" "+ font_size+"px '"+ o.dialog.text_font +"' ";

this.ctx.fillText(texts[i].text , x, text_y , w);

text_y += font_size + (texts[i].margin || 10);

}

};

MAIN.prototype.game_start = function(){

this.dialog_window(this.options);

this.dialog_text(this.options , [

{text:"壁打ちブロック" , size:30 , margin:30 , weight:"bold"},

{text:"画面をクリックすると"},

{text:"ゲームが開始します"}

]);

};

MAIN.prototype.game_over = function(){

this.flg_gamestart = false;

this.data_reset();

this.dialog_window(this.options);

this.dialog_text(this.options , [

{text:"Game over", size:30 , margin:30 , color:"red" , weight:"bold"},

{text:"画面をクリックすると"},

{text:"ゲームが開始します"}

]);

};

MAIN.prototype.data_reset = function(){

this.options = JSON.parse(JSON.stringify(__options));

// 画面サイズ調整

this.options.wall.w = window.innerWidth < this.options.wall.w ? window.innerWidth : this.options.wall.w;

this.options.wall.h = window.innerHeight < this.options.wall.h ? window.innerHeight : this.options.wall.h;

// blockサイズ調整

var w = this.options.wall.w - (this.options.wall.size*2) - this.options.block.margin_left;

this.options.block.col = Math.round(w / (this.options.block.w + (this.options.block.gap_x * 2)));

this.options.block.margin_left = (w - (this.options.block.col * this.options.block.w) - this.options.block.gap_x) * 0.5;

this.options.wall.margin_top = (this.options.wall.h - this.options.wall.size) * 0.1;

var h = (this.options.wall.h - this.options.wall.size - this.options.wall.margin_top) * this.options.block.area_y;

this.options.block.row = Math.round(h / (this.options.block.h + this.options.block.gap_y));

// ボール初期値（画面の中心地）

this.options.ball.x = this.options.wall.w * 0.5;

this.options.ball.y = this.options.wall.h * 0.5;

};

MAIN.prototype.getCanvas = function(){

if(typeof this.canvas === "undefined"){

this.canvas = document.querySelector(__options.canvas);

}

return this.canvas;

};

MAIN.prototype.getContext = function(){

if(typeof this.ctx === "undefined"){

var canvas = this.getCanvas();

if(!canvas){return null;}

this.ctx = canvas.getContext("2d");

}

return this.ctx;

};

MAIN.prototype.check = function(){

var ctx = this.getContext();

if(ctx){

return true;

}

else{

return false;

}

};

MAIN.prototype.ctx_clear = function(){

this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);

};

MAIN.prototype.draw = function(flg){

if(!flg && this.flg_gamestart !== true){return;}

this.ctx_clear();

this.draw_wall(this.options.wall);

this.draw_bar( this.options.wall , this.options.bar);

this.draw_ball(this.options.wall , this.options.ball);

this.draw_block(this.options.wall , this.options.block);

};

MAIN.prototype.draw_wall = function(ow){

var ctx = this.ctx;

ctx.strokeStyle = ow.color_stroke;

ctx.strokeWidth = ow.color_stroke === "transparent" ? 0 : 1;

ctx.fillStyle = ow.color_fill;

ctx.beginPath();

ctx.moveTo(0,0);

ctx.lineTo(ow.w , 0);

ctx.lineTo(ow.w , ow.h);

ctx.lineTo(ow.w - ow.size , ow.h);

ctx.lineTo(ow.w - ow.size , ow.size);

ctx.lineTo(ow.size , ow.size);

ctx.lineTo(ow.size , ow.h);

ctx.lineTo(0 , ow.h);

ctx.lineTo(0 , 0);

ctx.stroke();

ctx.fill();

};

MAIN.prototype.draw_bar = function(ow,ob){

this.ctx.strokeStyle = ob.color_stroke;

this.ctx.strokeWidth = ob.color_stroke === "transparent" ? 0 : 1;

this.ctx.fillStyle = ob.color_fill;

ob.x = ob.x ? ob.x : (ow.w - ob.w) / 2;

ob.y = ow.h - ob.h - 50;

this.ctx.fillRect(ob.x , ob.y , ob.w , ob.h);

};

MAIN.prototype.draw_ball = function(ow,ob){

this.ctx.strokeStyle = ob.color_stroke;

this.ctx.strokeWidth = ob.color_stroke === "transparent" ? 0 : 1;

this.ctx.fillStyle = ob.color_fill;

this.ctx.beginPath();

ob.x = ob.x || ow.w / 2;

ob.y = ob.y || ow.h / 2;

this.ctx.arc( ob.x , ob.y , ob.r, 0, Math.PI * 2 );

this.ctx.fill();

};

MAIN.prototype.draw_block = function(wall , block){

this.ctx.strokeStyle = block.color_stroke;

this.ctx.strokeWidth = block.color_stroke === "transparent" ? 0 : 1;

this.ctx.fillStyle = block.color_fill;

var buffer = [];

for(var i=0; i<block.row; i++){

if(typeof buffer[i] === "undefined"){buffer[i] = [];}

for(var j=0; j<block.col; j++){

var x = block.margin_left + wall.size + (block.w * j) + (block.gap_x * j);

var y = block.margin_top + wall.size + (block.h * i) + (block.gap_y * i);

if(typeof block.buffer === "undefined"){

buffer[i][j] = {x : x , y : y};

this.ctx.fillRect(x , y , block.w , block.h);

}

else if(block.buffer[i][j].collision === true){

continue;

// this.ctx.fillStyle = block.collision_col;

// this.ctx.fillRect(x , y , block.w , block.h);

// this.ctx.fillStyle = block.color_fill;

}

else{

this.ctx.fillRect(x , y , block.w , block.h);

}

// if(typeof block.buffer === "undefined"){

// buffer[i][j] = {x : x , y : y};

// this.ctx.fillRect(x , y , block.w , block.h);

// }

// else if(typeof block.buffer !== "undefined"

// && typeof block.buffer[j] !== "undefined"

// && block.buffer[j][i]){

// this.ctx.fillRect(x , y , block.w , block.h);

// }

}

if(typeof block.buffer === "undefined"){

block.buffer = buffer;

}

};

MAIN.prototype.animation_set = function(){

if(this.flg_gamestart !== true){return;}

new LIB().anim((function(e){this.animation(e)}).bind(this));

};

MAIN.prototype.animation = function(timestamp){

if(this.flg_gamestart !== true){return;}

if (!this.time_start){this.time_start = timestamp;}

// debug用（play上限秒数）

// if(timestamp - this.time_start > 30000){return;}

// keydown-bar-move

switch(this.keydown_flg){

case "right":

this.bar_move(this.options.bar.x + this.options.bar.moveX);

break;

case "left":

this.bar_move(this.options.bar.x - this.options.bar.moveX);

break;

}

this.ball_move();

this.draw();

this.animation_set();

};

MAIN.prototype.ball_move = function(){

if(this.flg_gamestart !== true){return;}

this.options.ball.x += this.options.ball.moveX;

this.options.ball.y += this.options.ball.moveY;

this.collision_wall(this.options.wall , this.options.ball);

this.collision_bar(this.options.bar , this.options.ball);

this.collision_block(this.options.block , this.options.ball);

};

// 当たり判定（壁）

MAIN.prototype.collision_wall = function(ow , ob){

// <- : left

if(ob.x - ob.r < ow.size){

ob.x = ow.size + ob.r;

ob.moveX = ob.moveX * -1;

}

// ^ : top

if(ob.y - ob.r < ow.size){

ob.y = ow.size + ob.r;

ob.moveY = ob.moveY * -1;

}

// -> : right

if(ob.x + ob.r > ow.w - ow.size){

ob.x = ow.w - ow.size - ob.r;

ob.moveX = ob.moveX * -1;

}

// v : bottom (game-over)

if(ob.y + ob.r > ow.h){

this.game_over();

}

// 当たり判定（ラケット）

MAIN.prototype.collision_bar = function(bar , ball){

// ボールが上移動の場合は処理対象外

if(ball.moveY < 0){return;}

// ball-direct-under (正反射)

if(ball.y + ball.r > bar.y

&& ball.y + ball.r < bar.y + bar.h

&& ball.x > bar.x

&& ball.x < bar.x + bar.w){

ball.moveY = ball.moveY * -1;

}

// 左角判定（ボールと角との距離がボール半径以下の判定）

else if(Math.sqrt(Math.pow(bar.x - ball.x, 2) + Math.pow(bar.y - ball.y, 2)) <= ball.r){

if(ball.moveX > 0){

this.calc_angle(bar , ball);

}

else{

ball.moveY = ball.moveY * -1;

}

// 右角判定（ボールと角との距離がボール半径以下の判定）

else if(Math.sqrt(Math.pow((bar.x + bar.w) - ball.x, 2) + Math.pow(bar.y - ball.y, 2)) <= ball.r){

if(ball.moveX < 0){

this.calc_angle(bar , ball);

}

else{

ball.moveY = ball.moveY * -1;

}

};

// 当たり判定（ブロック）

MAIN.prototype.collision_block = function(block , ball){

if(typeof block.buffer === "undefined"){return;}

for(var i=0; i<block.row; i++){

if(typeof block.buffer[i] === "undefined"){continue;}

for(var j=0; j<block.col; j++){

if(!block.buffer

|| typeof block.buffer[i][j] === "undefined"

|| !block.buffer[i][j]

|| block.buffer[i][j].collision === true){continue;}

// 左右正反射

if(ball.x + ball.r > block.buffer[i][j].x

&& ball.x - ball.r < block.buffer[i][j].x + block.h

&& ball.y > block.buffer[i][j].y

&& ball.y < block.buffer[i][j].y + block.h){

block.buffer[i][j].collision = true;

// ボール座標を調整

if(ball.moveX < 0){

ball.x = block.buffer[i][j].x + block.w + ball.r;

}

else{

ball.x = block.buffer[i][j].x - ball.r;

}

// 方向転換

ball.moveX = ball.moveX * -1;

return;

}

// 上下正反射

if(ball.y + ball.r > block.buffer[i][j].y

&& ball.y - ball.r < block.buffer[i][j].y + block.h

&& ball.x > block.buffer[i][j].x

&& ball.x < block.buffer[i][j].x + block.w){

block.buffer[i][j].collision = true;

// ボール座標を調整

if(ball.moveY < 0){

ball.y = block.buffer[i][j].y + block.h + ball.r;

}

else{

ball.y = block.buffer[i][j].y - ball.r;

}

// 方向転換

ball.moveY = ball.moveY * -1;

return;

}

// 左上角判定

else if(Math.pow(block.buffer[i][j].x - ball.x, 2) + Math.pow(block.buffer[i][j].y - ball.y, 2) <= ball.r){

block.buffer[i][j].collision = true;

if(ball.moveX > 0 && ball.moveY > 0){

ball.moveX = ball.moveX * -1;

ball.moveY = ball.moveY * -1;

}

else if(ball.moveX < 0 && ball.moveY > 0){

ball.moveY = ball.moveY * -1;

}

else if(ball.moveX > 0 && ball.moveY < 0){

ball.moveX = ball.moveX * -1;

}

return;

}

// 右上角判定

else if(Math.sqrt(ball.x - block.buffer[i][j].x - block.w, 2) + Math.pow(block.buffer[i][j].y - ball.y, 2) <= ball.r){

block.buffer[i][j].collision = true;

if(ball.moveX < 0 && ball.moveY > 0){

ball.moveX = ball.moveX * -1;

ball.moveY = ball.moveY * -1;

}

else if(ball.moveX > 0 && ball.moveY > 0){

ball.moveY = ball.moveY * -1;

}

else if(ball.moveX < 0 && ball.moveY < 0){

ball.moveX = ball.moveX * -1;

}

return;

}

// 左下角判定

else if(Math.sqrt(block.buffer[i][j].x - ball.x, 2) + Math.pow(ball.y - block.buffer[i][j].y + block.h , 2) <= ball.r){

block.buffer[i][j].collision = true;

if(ball.moveX > 0 && ball.moveY < 0){

ball.moveX = ball.moveX * -1;

ball.moveY = ball.moveY * -1;

}

else if(ball.moveX < 0 && ball.moveY < 0){

ball.moveY = ball.moveY * -1;

}

else if(ball.moveX > 0 && ball.moveY > 0){

ball.moveX = ball.moveX * -1;

}

return;

}

// 右下角判定

else if(Math.sqrt(ball.x - block.buffer[i][j].x - block.w, 2) + Math.pow(ball.y - block.buffer[i][j].y + block.h , 2) <= ball.r){

block.buffer[i][j].collision = true;

if(ball.moveX < 0 && ball.moveY < 0){

ball.moveX = ball.moveX * -1;

ball.moveY = ball.moveY * -1;

}

else if(ball.moveX > 0 && ball.moveY < 0){

ball.moveY = ball.moveY * -1;

}

else if(ball.moveX < 0 && ball.moveY > 0){

ball.moveX = ball.moveX * -1;

}

return;

}

MAIN.prototype.calc_angle = function(bar,ball){

// // 現在のボールの進行角度

// var angle1 = Math.atan2(Math.abs(ball.moveY) , Math.abs(ball.moveX)) * 180 / Math.PI;

// // 角座標とボール中心地の角度

// var angle2 = Math.atan2(bar.y - ball.y , bar.x - ball.x) * 180 / Math.PI;

// // 誤差角度を反転

// angle1 += -(angle1 - angle2);

// // 角度を反映

// ball.moveY = Math.sin(angle1) * ball.r;

// ball.moveX = Math.cos(angle1) * ball.r;

// 反転

ball.moveX = -ball.moveX;

ball.moveY = -ball.moveY;

// console.log(angle1 +":"+ ball.moveX +"/"+ ball.moveY);

// console.log(angle1 +"/"+ angle2 +":"+Math.abs(ball.moveY)+"/"+Math.abs(ball.moveX));

};

MAIN.prototype.event_set = function(){

new LIB().event(window , "click" , (function(e){this.click(e)}).bind(this));

new LIB().event(window , "keydown" , (function(e){this.keydown(e)}).bind(this));

new LIB().event(window , "keyup" , (function(e){this.keyup(e)}).bind(this));

new LIB().event(window , "mousemove" , (function(e){this.mousemove(e)}).bind(this));

new LIB().event(window , "touchmove" , (function(e){this.touchmove(e)}).bind(this));

new LIB().event(window , "touchend" , (function(e){this.touchend(e)}).bind(this));

};

MAIN.prototype.click = function(e){

if(this.flg_gamestart === true){return}

this.flg_gamestart = true;

this.animation_set();

};

MAIN.prototype.bar_move = function(bar_x){

if(bar_x < this.options.wall.size){

bar_x = this.options.wall.size;

}

if(bar_x + this.options.bar.w > this.options.wall.w - this.options.wall.size){

bar_x = this.options.wall.w - this.options.wall.size - this.options.bar.w;

}

this.options.bar.x = bar_x;

};

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;

}

};

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.bar_move(this.options.bar.x + (e.clientX - this.mousePos));

this.mousePos = e.clientX;

this.draw();

};

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.bar_move(this.options.bar.x + (e.touches[0].clientX - this.mousePos));

this.mousePos = e.touches[0].clientX;

this.draw();

};

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)})}

};

LIB.prototype.anim = function(func , time){

if(window.requestAnimationFrame

|| window.webkitRequestAnimationFrame

|| window.mozRequestAnimationFrame

|| window.oRequestAnimationFrame

|| window.msRequestAnimationFrame){

window.requestAnimationFrame(func);

}

else{

time = time || 0;

anim_flg = setTimeout(func , time);

}

};

LIB.prototype.construct = function(){

switch(document.readyState){

case "complete" : new MAIN();break;

case "interactive" : this.event(window , "DOMContentLoaded" , (function(){new MAIN()}).bind(this));break;

default : this.event(window , "load" , (function(){new MAIN()}).bind(this));break;

}

};

new LIB().construct();

})();

本日のまとめ

今回のポイントは、ブロックの配置情報をメモリ(buffer)として保持しておき、それらを計算で当たり判定を行う処理です。

もちろん、ブロックの数が増えると、処理が重くなってきて、CPU負荷が高くなってしまいますが、表示サイズに応じたCPUで、今のところはなんとか大丈夫なレベルの負荷のようです。

ブロック崩しは、制作プログラマによって、若干のルールが違っているのが作ってみてよく分かりました。

ブロックの横面に当たったら、必ず下方向を向くようにすることで、かんたんに上段の連続モードに持って行きづらくするようにできたり、
２つのブロックを同時に消したりはできないようにしたり、

様々な詳細ルールを設けることにより、ゲーム性の向上につながるのが理解できます。

とりあえず、ブロック崩しは、今回で終了になります。

全体のソースは、githubにpushしているので、そちらから取得してください。

https://github.com/yugeta/game_block

Program canvas, Game, JavaScript, library構築

Tips of Rubbish

DIYとIoTをこよなく愛する、WEB関連やデジモノなどの雑多な情報ブログ