Sample of HTML 5 game development

最新推荐文章于 2025-08-12 15:05:40 发布

stefli

最新推荐文章于 2025-08-12 15:05:40 发布

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分类专栏： Html5 文章标签： html function browser image c

本文链接：https://blog.youkuaiyun.com/stefli/article/details/6635558

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本文介绍了一个简单的HTML5游戏开发实例，展示了如何使用Canvas API进行基本的游戏制作，包括监听键盘事件来控制游戏中的车辆移动。

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Just a sample of HTML 5 game development.

<!DOCTYPE html>
<html>
	<head>
		<script type="text/javascript">
			var VehicleGame = function() {
				var ctx;
				var goRight = false, goLeft = false, pause = false;
				var vx = 0, vy = 0, dx = 4, dy = 4;
				var init = function(id) {
					var el = document.getElementById(id);
					if (el && el.getContext) {
						ctx = el.getContext("2d");
						this.run();
						this.addListener();
					}
				}

				init.prototype = {
					clear: function() {
						ctx.fillStyle = '#c2c2c2';
						ctx.fillRect(0, 0, 600, 400);
						ctx.strokeStyle = '#333';
						ctx.strokeRect(0, 0, 600, 400);
					},
					run: function() {
						var _this = this;
						this.interval = setInterval(function () {
							_this.drawVehicle();
						}, 16)
					},
					drawVehicle: function() {
						this.clear();
						var vehicle = new Image();
						vehicle.src = 'vehicle.png';
						ctx.drawImage(vehicle, vx, vy);
						if (pause) {
							this.showInfo("Paused!!!Press spacebar to cancel it!");
						}
						if (goLeft && !pause) {
							vx -= dy;
						}
						if (goRight && !pause) {
							vx += dx;
						}
					},
					showInfo: function(message) {
						ctx.fillStyle = '#333';
						ctx.font = '24px "Calibri"';
						ctx.fillText(message, 100, 180);
					},
					addListener: function() {
						document.addEventListener('keydown', function (e) {
							if (e.keyCode == 39) {
								goRight = true;
							} else if (e.keyCode == 37) {
								goLeft = true;
							}
						}, false);
						document.addEventListener('keyup', function (e) {
							if (e.keyCode == 39) {
								goRight = false;
							} else if (e.keyCode == 37) {
								goLeft = false;
							} else if (e.keyCode == 32) {
								pause = !pause ? true : false;
							}
						}, false);
					}
				}
				return init;
			}();

			window.onload = function() {
				new VehicleGame("canvas");
			}
		</script>
	</head>
	<body>
		<canvas id="canvas" width="600" height="400">
			Your browser can not support canvas, please upgrade your browser!
		</canvas>
	</body>
</html>

Result: