一个用Jquery+HTML写的贪吃蛇半成品
一直想用JQUERY+HTML+CSS完成一个游戏,就从经典的贪吃蛇入手了。直接上码:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>贪吃蛇</title> <style> * { margin: 0; padding: 0; } #header { border: 1px solid #000; position: relative; } #box { height: 20px; background: red; display: block; position: absolute; text-align: center; z-index: 9999; } #box li { width: 20px; height: 20px; float: left; display: inline; } .food { width: 10px; height: 10px; position: absolute; text-align: center; background: green; z-index: 0 } .transform_left { transform: rotate(360deg); -ms-transform: rotate(360deg); /* Internet Explorer */ -moz-transform: rotate(360deg); /* Firefox */ -webkit-transform: rotate(-180deg); /* Safari 和 Chrome */ -o-transform: rotate(360deg); /* Opera */ } .transform_up { transform: rotate(90deg); -ms-transform: rotate(90deg); /* Internet Explorer */ -moz-transform: rotate(90deg); /* Firefox */ -webkit-transform: rotate(90deg); /* Safari 和 Chrome */ -o-transform: rotate(90deg); /* Opera */ } .transform_down { transform: rotate(270deg); -ms-transform: rotate(270deg); /* Internet Explorer */ -moz-transform: rotate(270deg); /* Firefox */ -webkit-transform: rotate(270deg); /* Safari 和 Chrome */ -o-transform: rotate(270deg); /* Opera */ } .transform_right { transform: rotate(180deg); -ms-transform: rotate(180deg); /* Internet Explorer */ -moz-transform: rotate(180deg); /* Firefox */ -webkit-transform: rotate(1800deg); /* Safari 和 Chrome */ -o-transform: rotate(180deg); /* Opera */ } </style> </head> <body> <div id="header"> <ul id="box"> <li> 1 </li> <li> </li> </ul> </div> <div id="footer"> </div> <script src="http://libs.baidu.com/jquery/1.9.0/jquery.js"></script> <script> var active = ‘right‘; var speed = 20; var pix_x = 20; var pix_y = 20; var screen_x = speed * pix_x; var screen_y = speed * pix_y; var is_true = false;//是否撞击成功 //活动物体 var obj = $("#box"); //活动范围初始化 var header = $("#header"); var screen_width = screen_x + obj.width(); var screen_height = screen_y + obj.height() header.width(screen_width); header.height(screen_height); //食物初始化 food_obj = food(); collide(obj, food_obj); //开始做运动 setInterval(beam, 80); /** * 鼠标点击控制 */ $(document).click(function(e){ var x = e.pageX; var y = e.pageY; if (x > screen_x) { x = screen_x; } if (y > screen_y) { y = screen_y; } obj.animate({ left: x, top: y, }, ‘fast‘); }); /** * 键盘控制 */ $(window).keydown(function(event){ obj.removeClass(); switch (event.keyCode * 1) { case 37://左 active = ‘left‘; obj.addClass("transform_left"); break; case 38://上 active = ‘up‘; obj.addClass("transform_up"); break; case 39://右 active = ‘right‘; obj.addClass("transform_right"); break; case 40://下 active = ‘down‘; obj.addClass("transform_down"); break; } }); /** * 生成食物 */ function food(){ //获取随机坐标 var rp = random_postion(); $("<div>", { "text": "1", "id": "food", "class": "food", }).appendTo("#header").css({ "top": rp.y, "left": rp.x }); return $("#food"); } /** * 两个物体撞击 * @param {Object} $obj_first * @param {Object} $obj_second */ function collide($obj_first, $obj_second){ //第一个物体的四个角的坐标,第一个物体要大一点 var first_p = four_dot_sit($obj_first); //第二个物体的四个角的坐标 var second_p = four_dot_sit($obj_second); //小体左上角 if (second_p.left_top_x >= first_p.left_top_x && second_p.left_top_x <= first_p.right_top_x && second_p.left_top_y >= first_p.left_top_y && second_p.left_top_y <= first_p.left_bottom_y) { return true; } //小体右下角 if (second_p.right_bottom_x >= first_p.left_top_x && second_p.right_bottom_x <= first_p.right_top_x && second_p.right_bottom_y >= first_p.left_top_y && second_p.right_bottom_y <= first_p.left_bottom_y) { return true; } } /** * 一个物体的四个点的坐标 */ function four_dot_sit($obj){ var width = $obj.width(); var height = $obj.height(); var p = {}; var pt = $obj.position(); var x = pt.left; var y = pt.top; //左上角坐标 p.left_top_x = x; p.left_top_y = y; //左下角坐标 p.left_bottom_x = x; p.left_bottom_y = y + height; //右上角坐标 p.right_top_x = x + width; p.right_top_y = y; //右下角坐标 p.right_bottom_x = x + width; p.right_bottom_y = y + height; return p; } /** * 获取活动范围内的随机坐标 */ function random_postion(){ var p = {}; p.x = Math.floor(Math.random() * pix_x) * speed; p.y = Math.floor(Math.random() * pix_y) * speed; return p; } /** 计算该物体到四个方向的距离 **/ function box_dis(){ var w = {}; w.left = obj.position().left; w.top = obj.position().top; w.bottom = screen_y - w.top; w.right = screen_x - w.left; return w; } /** 物体移动 **/ function beam(){ box_x = obj.position().left; box_y = obj.position().top; w = box_dis(); //检查边界 if (box_x == 0 && box_y == 0 || w.left < speed) { active = ‘right‘; } if (box_x == screen_x && box_y == 0 || w.top < speed) { active = ‘down‘; } if (box_x == screen_x && box_y == screen_y || w.right < speed) { active = ‘left‘; } if (box_x == 0 && box_y == screen_y || w.bottom < speed) { active = ‘up‘; } //动起来 switch (active) { case ‘left‘://左 obj.css({ "left": box_x - speed }); break; case ‘up‘://上 obj.css({ "top": box_y - speed }); break; case ‘right‘://右 obj.css({ "left": box_x + speed }); break; case ‘down‘://下 obj.css({ "top": box_y + speed }); break; } var is_true = collide(obj, food_obj); if (is_true) { var txt = parseInt(food_obj.text()); food_obj.remove(); //重新生成食物 food_obj = food(); food_obj.text(txt + 1); is_true = false; } $("#footer").html("方向:" + active + "<br/>距离:left:" + w.left + "top:" + w.top + "bottom:" + w.bottom + "right:" + w.right + "<br/>坐标:x:" + box_x + "y:" + box_y); } </script> </body> </html>
大家可以复制运行一下。
但本人还有如下工作未完成:
1,贪吃蛇吃完食物后,没有将自身加一格,即加长身子;
2,贪吃蛇一格一格地蜿蜒移动;
3,贪吃蛇咬了自己的身子,game over;
苦于自己的能力限制,一直没有想到更好的解决办法,欢迎博友们提供思路(语言环境定在JQ+HTML+CSS3了)。在下感激不尽!
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