標籤：style blog http java color os io width
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><head> <title></title></head><body onkeydown="getCommand()"> <canvas id="tankMap" width="400px" height="300px" style="background-color: black"></canvas> <script type="text/javascript"> //得到畫布 var canvas1 = document.getElementById("tankMap"); //取得畫布畫筆對象 var cxt = canvas1.getContext("2d"); //定義一個Hero類 //x表示橫座標，主表示縱座標 function Hero(x, y, direct, speed) { this.x = x; this.y = y; this.speed = speed; this.direct = direct; //向上 this.moveUp = function () { this.y -= this.speed; } //向右 this.moveRight = function () { this.x += this.speed; } //向下 this.moveDown = function () { this.y += this.speed; } //向左移 this.moveLeft = function () { this.x -= this.speed; } } //我的坦克 w表示向上,d表示向右 s表示向下 a表示向左 var hero = new Hero(140, 140, 0, 10); //先畫出坦克 darwTank(hero); //繪製坦克對象 function darwTank(hero) { //畫出坦克 cxt.fillStyle = "#DED284"; //畫出左面 cxt.fillRect(hero.x, hero.y, 5, 30); //畫出右邊 cxt.fillRect(hero.x + 15, hero.y, 5, 30); //中間矩形 cxt.fillRect(hero.x + 6, hero.y + 5, 8, 20); //畫出坦克的蓋子 cxt.fillStyle = "#FFD972"; cxt.arc(hero.x + 10, hero.y + 15, 4, 0, 360, true); cxt.fill(); //車出炮線 cxt.strokeStyle = "#FFD972"; cxt.lineWidth = 1.5; cxt.beginPath(); cxt.moveTo(hero.x + 10, hero.y + 15); cxt.lineTo(hero.x + 10, hero.y); cxt.closePath(); cxt.stroke(); } //接收鍵盤命令 function getCommand() { var code = event.keyCode; //alert(code); switch (code) { case 87: hero.moveUp(); break; case 68: hero.moveRight(); break; case 83: hero.moveDown(); break; case 65: hero.moveLeft(); break; } cxt.clearRect(0, 0, 400, 300); darwTank(hero); } </script></body></html>
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