function Sprite_Keiken() {
	this.initialize(...arguments);
}

Sprite_Keiken.prototype = Object.create(Sprite.prototype);
Sprite_Keiken.prototype.constructor = Sprite_Keiken;

Sprite_Keiken.prototype.initialize = function () {
	Sprite.prototype.initialize.call(this);

	this.anchor.x = 0.5;
	this.anchor.y = 0.5;

	this.scale.x = 0.3;
	this.scale.y = 0.3;
	this.speed = 0;

	this.disX = $gameMap._parallaxX;
	this.disY = $gameMap._parallaxY;

	this.setCharacterBitmap();
};
//場所移動するだけでいいや
Sprite_Keiken.prototype.update = function () {
	if (this.death) {
		return;
	}
	Sprite.prototype.update.call(this);

	this.x -= ($gameMap._parallaxX - this.disX) * 48;
	this.disX = $gameMap._parallaxX;
	this.y -= ($gameMap._parallaxY - this.disY) * 48;
	this.disY = $gameMap._parallaxY;

	if (!this.speed) {
		var kyori =
			(this.x - (Graphics.boxWidth - SURVIVOR_CONST.RIGHT_MARGIN) / 2) * (this.x - (Graphics.boxWidth - SURVIVOR_CONST.RIGHT_MARGIN) / 2);
		kyori += (this.y - Graphics.boxHeight / 2) * (this.y - Graphics.boxHeight / 2);
		kyori = Math.sqrt(kyori);
		//プレイヤーが接触したら
		if (kyori < $gameTemp.SURVIVOR_player_data.collect_range) {
			this.speed = -8;
		}
	} else {
		//atan2使うと微妙に遅いからx^2 + y^2 = r^2 、y=kxを使ってspeed(移動させたい距離r)として動かしたいxとyの大きさを導く
		var sa_x = this.x - (Graphics.boxWidth - SURVIVOR_CONST.RIGHT_MARGIN) / 2;
		var sa_y = this.y - Graphics.boxHeight / 2;
		if (this.speed < 0) {
			sa_x *= -1;
			sa_y *= -1;
		}
		var k = sa_y / sa_x;

		var x = Math.sqrt((this.speed * this.speed) / (1 + k * k));

		//xを基に導くけど2乗してるから+-どっちかわからん
		if (0 < sa_x) {
			x = -x;
		}

		var y = k * x;

		//xかyどちらかが中央超えたら削除
		if (sa_x * (sa_x + x) < 0 || sa_y * (sa_y + y) < 0) {
			//this.visible = false;
			this.death = true;
			this.speed = 0;
			survivorState.keikenDel.push(this.spriteId);
			if (!survivorState.se_cool) {
				AudioManager.playSe({ name: "Item1", volume: 20, pitch: 150, pan: 0 });
				survivorState.se_cool = 5;
			}
		}
		this.x += x;
		this.y += y;
		this.speed += 0.2;
	}
};

Sprite_Keiken.prototype.setCharacterBitmap = function () {
	this.bitmap = ImageManager.loadCharacter("!Door2");
	this.setFrame(48 * 3, 48 * 2, 48, 48);
};