微信小程序预约_js完成带积分弹球小游戏

js实现带积分弹球小游戏       这篇文章主要为大家详细介绍了js实现带积分弹球小游戏,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

本文实例为大家分享了js实现带积分的弹球小游戏的具体代码,供大家参考,具体内容如下

注:如果小球与底部方块的角碰撞,积分可能有些许bug

 style 
 #box {
 width: 400px;
 height: 400px;
 border: 1px solid #000000;
 margin: 50px auto;
 position: relative;
 #ball {
 height: 60px;
 width: 60px;
 border-radius: 50%;
 background-color: red;
 position: absolute;
 left: 0;
 top: 0;
 #block {
 width: 100px;
 height: 20px;
 position: absolute;
 left: 150px;
 bottom: 0;
 background-color: black;
 #count {
 color: #ff0000;
 font-size: 18px;
 position: absolute;
 width: 20px;
 height: 20px;
 left: -20px;
 top: 0;
 /style 

var oBox = document.querySelector('#box'); var oBall = document.querySelector('#ball'); var oBlock = document.querySelector('#block'); var oCount = document.querySelector('#count'); var speedBlock = 5; var speedX = 5; var speedY = 4; var maxLeft = oBox.clientWidth - oBall.offsetWidth; var maxTop = oBox.clientHeight - oBall.offsetHeight; var max = oBox.clientWidth - oBlock.offsetWidth; setInterval(function () { var left = oBall.offsetLeft; var top = oBall.offsetTop; left += speedX; top += speedY; if (left 0 || left maxLeft) { speedX = -speedX; if (top 0) { speedY *= -1; var r = oBall.offsetWidth / 2; if (left = oBlock.offsetLeft - r // 左边线碰撞条件 left = oBlock.offsetLeft - r + oBlock.offsetWidth // 右边线碰撞条件 top = maxTop - oBlock.offsetHeight // 下边线碰撞条件 // console.log('撞上了'); speedY = -Math.abs(speedY); // speedY *= -1; oCount.innerHTML = oCount.innerHTML * 1 + 1; if (top maxTop) { left = 0; top = 0; oBall.style.left = left + 'px'; oBall.style.top = top + 'px'; }, 50); document.onkeydown = function (e) { var ev = event || e; var keyCode = ev.keyCode || ev.which; var left = oBlock.offsetLeft; if (keyCode === 37) { left -= speedBlock; if (keyCode === 39) { left += speedBlock; if (left = 0) { left = 0 if (left = max) { left = max; oBlock.style.left = left + 'px'; /script

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持凡科。


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