私はサイズ変更に対応するポンキャンバスゲームを作ろうとしていますが、何が欠けているのか、また重いものを処理していない間に応答性を持たせるための最良の方法は何ですか?私はあなたには、洞察力のためのおかげで多くの、はるかに高く評価サイズ変更時にキャンバスゲームを反応させる
http://jsfiddle.net/ut0hsvd4/1/
var animate = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || function(callback) {
window.setTimeout(callback, 1000/60)
};
var canvas = document.createElement("canvas");
var width = document.getElementById('pong').offsetWidth;
var height = document.getElementById('pong').offsetHeight;
canvas.width = width;
canvas.height = height;
var context = canvas.getContext('2d');
var player = new Player();
var computer = new Computer();
var ball = new Ball(width/2, height/2);
var keysDown = {};
var render = function() {
context.fillStyle = "red";
context.fillRect(0, 0, width, height);
player.render();
computer.render();
ball.render();
};
var update = function() {
player.update();
computer.update(ball);
ball.update(player.paddle, computer.paddle);
};
var step = function() {
update();
render();
animate(step);
};
function Paddle(x, y, width, height) {
this.x = x;
this.y = y;
this.width = width;
this.height = height;
this.x_speed = 0;
this.y_speed = 0;
}
Paddle.prototype.render = function() {
context.fillStyle = "#0000FF";
context.fillRect(this.x, this.y, this.width, this.height);
};
Paddle.prototype.move = function(x, y) {
this.x += x;
this.y += y;
this.x_speed = x;
this.y_speed = y;
if (this.x < 0) {
this.x = 0;
this.x_speed = 0;
} else if (this.x + this.width > width) {
this.x = width - this.width;
this.x_speed = 0;
}
};
function Computer() {
this.paddle = new Paddle(width/2 - 25, 10, 50, 10);
}
Computer.prototype.render = function() {
this.paddle.render();
};
Computer.prototype.update = function(ball) {
var x_pos = ball.x;
var diff = -((this.paddle.x + (this.paddle.width/2)) - x_pos);
if (diff < 0 && diff < -4) {
diff = -5;
} else if (diff > 0 && diff > 4) {
diff = 5;
}
this.paddle.move(diff, 0);
if (this.paddle.x < 0) {
this.paddle.x = 0;
} else if (this.paddle.x + this.paddle.width > width) {
this.paddle.x = width - this.paddle.width;
}
};
function Player() {
this.paddle = new Paddle(width/2 - 25, height - 20, 50, 10);
}
Player.prototype.render = function() {
this.paddle.render();
};
Player.prototype.update = function() {
for (var key in keysDown) {
var value = Number(key);
if (value == 37) {
this.paddle.move(-4, 0);
} else if (value == 39) {
this.paddle.move(4, 0);
} else {
this.paddle.move(0, 0);
}
}
};
function Ball(x, y) {
this.x = x;
this.y = y;
this.x_speed = 0;
this.y_speed = 3;
}
Ball.prototype.render = function() {
context.beginPath();
context.arc(this.x, this.y, 5, 2 * Math.PI, false);
context.fillStyle = "#000000";
context.fill();
};
Ball.prototype.update = function(paddle1, paddle2) {
this.x += this.x_speed;
this.y += this.y_speed;
var top_x = this.x - 5;
var top_y = this.y - 5;
var bottom_x = this.x + 5;
var bottom_y = this.y + 5;
if (this.x - 5 < 0) {
this.x = 5;
this.x_speed = -this.x_speed;
} else if (this.x + 5 > width) {
this.x = width - 5;
this.x_speed = -this.x_speed;
}
if (this.y < 0 || this.y > height) {
this.x_speed = 0;
this.y_speed = 3;
this.x = width/2;
this.y = height/2;
}
if (top_y > height/2) {
if (top_y < (paddle1.y + paddle1.height) && bottom_y > paddle1.y && top_x < (paddle1.x + paddle1.width) && bottom_x > paddle1.x) {
this.y_speed = -3;
this.x_speed += (paddle1.x_speed/2);
this.y += this.y_speed;
}
} else {
if (top_y < (paddle2.y + paddle2.height) && bottom_y > paddle2.y && top_x < (paddle2.x + paddle2.width) && bottom_x > paddle2.x) {
this.y_speed = 3;
this.x_speed += (paddle2.x_speed/2);
this.y += this.y_speed;
}
}
};
document.getElementsByClassName('js-pong')[0].appendChild(canvas);
animate(step);
window.addEventListener("keydown", function(event) {
keysDown[event.keyCode] = true;
});
window.addEventListener("keyup", function(event) {
delete keysDown[event.keyCode];
});
var resizer = function() {
document.getElementsByTagName('canvas').remove();
document.getElementsByClassName('js-pong')[0].appendChild(canvas);
animate(step);
}
window.addEventListener('resize', resizer);
(あなたがを使用している場合)あなただけのcanvas.width、canvas.heightを変更することで、キャンバスのサイズを変更、またはAMできる保証します私は何かを欠いている? – Kai
しかしパドルの位置とサイズを更新しないと、私はゲーム全体を削除して再初期化するのではなく、もっと重要な方法だと思った。 – HendrikEng