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jQuery实现的分子运动小球碰撞效果

2019-11-20 10:40:25
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本文实例讲述了jQuery实现的分子运动小球碰撞效果。分享给大家供大家参考,具体如下:

先看效果图吧,因为小球是运动状态的,不好截图,这里就先大体画了一下路线,表示大体意思吧,如果想看真实的效果,自己粘贴下去运行:

小球有点小哟,嘿嘿,没有对细节进行详细的处理,如果像让它完美一点,自己处理下吧!这里是模拟的理想状态下的,没有摩擦力与组里的分子碰撞运动,高科技哟~~~~~~mu~a
代码也没有整理,如果有心的话,把它整理成面向对象形式的吧!

代码如下:

<!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>  <title></title>  <script src="jquery-1.7.1.min.js" type="text/javascript"></script>  <script type="text/javascript" >    var dim_half_past_PI = dimAngle(Math.PI / 2); // Math.PI/2的约数    var lastAngle = dimAngle(Math.PI/8); // 发射角度(0-dimAngle(Math.PI))    var v = 120; //飞行速度【>0】    var lastPosition = {}; // 最后一次碰撞坐标    var lastTime = ""; // 最后一次碰撞时间    var lastDirection = "top"; // 开始发射方向(top,bottom,left,right)    var horizen = 1; // 水品方向的积数    var vertical = 1; // 竖直方向的积数    var box = {};    function dimAngle(angle) {      var tempAngle = angle + "";      return parseFloat(tempAngle.substring(0, 6));    }    function getWillDirection(position, box) {      var direction = lastDirection;      if (position.x < box.left) {        direction = "right";      }      if (position.x > box.right) {         direction = "left"      }      if (position.y < box.top) {        direction = "bottom";      }      if (position.y > box.bottom) {        direction = "top";      }      return direction;    }    function getScale(direction, angle) {       switch(direction){        case "top":          vertical = -1;          if (angle < dim_half_past_PI) {            horizen = 1;          }          if (angle > dim_half_past_PI) {            horizen = -1;          }          if (angle == dim_half_past_PI) {            horizen = 0;          }          break;        case "left":          horizen = -1;          if (angle > dim_half_past_PI) {            vertical = 1;          }          if (angle < dim_half_past_PI) {            vertical = -1;          }          if (angle == dim_half_past_PI) {            vertical = 0;          }          break;        case "bottom":          vertical = 1;          if(angle > dim_half_past_PI) {            horizen = 1;          }          if(angle < dim_half_past_PI) {            horizen = -1;          }          if(angle == dim_half_past_PI) {            horizen = 0;          }          break;        case "right":          horizen = 1;          if (angle > dim_half_past_PI) {            vertical = -1;          }          if (angle < dim_half_past_PI) {            vertical = 1;          }          if (angle == dim_half_past_PI) {            vertical = 0;          }          break;      }    }    function getOutAngle(inAngle) {      if (inAngle == dim_half_past_PI || inAngle == 0) {        return inAngle;      } else {        return dim_half_past_PI - inAngle;      }    }    function setPosition(obj, position) {      obj.css({ "left": position.x +"px", "top": position.y +"px"});    }    function run(obj) {      var vx = Math.cos(lastAngle) * v;      var vy = Math.sin(lastAngle) * v;      var runTime = (new Date().getTime() - lastTime) / 1000;      getScale(lastDirection, lastAngle);      var sx = vx * runTime * horizen;      var sy = vy * runTime * vertical;      var position = {        x: lastPosition.x + sx,        y: lastPosition.y + sy      };      setPosition(obj, position);      var currentDirection = getWillDirection(position, box);      console.log(currentDirection +":"+lastDirection+":"+vertical+":"+horizen+":"+lastAngle+":"+dim_half_past_PI);      // 如果没有发生碰撞      if (currentDirection != lastDirection) {        // 如果发生了碰撞        lastDirection = currentDirection;        lastPosition = position;        lastTime = new Date().getTime();        lastAngle = getOutAngle(lastAngle);      }      setTimeout(function () {        run(obj);      }, 30);    }    $(document).ready(function () {      var boxer = $("#box");      var x = parseInt(boxer.offset().left);      var y = parseInt(boxer.offset().top);      box = {        left: x,        top: y,        right: x + boxer.width(),        bottom: y + boxer.height()      };      var runner = $("#runner");      lastTime = new Date().getTime();      lastPosition = {        x: x,        y: y + boxer.height()      };      run(runner);    });  </script>  <style type="text/css" >  body { margin:0; padding:0; }  #box { margin:0 auto; width:500px; height:500px; border:3px solid #DDDDDD; border-radius:4px; -wekit-border-radius:4px; -moz-border-radius:4px;}  #runner { width:10px; height:10px; font-size:10px; color:black; padding:0; position:absolute; left:100px; top:480px;}  </style></head><body><div id="box"><div id="runner">●</div></div></body></html>

更多关于jQuery特效相关内容感兴趣的读者可查看本站专题:《jQuery常见经典特效汇总》及《jQuery动画与特效用法总结

希望本文所述对大家jQuery程序设计有所帮助。

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