一些潜水器的起始位置和随机移动

Start position and random movement for some divs

本文关键字：位置 随机 移动 潜水      更新时间：2023-09-26

我想做一些类似于这个操作的事情，但让div从随机位置开始，而不是从左上角开始。

$(document).ready(function () {
    newDiv();
    newDiv();
    newDiv();
    newDiv();
    newDiv();
    newDiv();
});
function newDiv() {
    var $div = $("<div class='a'>");
    $(".animatedDivs").append($div);
    animateDiv();
    function animateDiv() {
        var newq = makeNewPosition();
        var oldq = $div.offset();
        var speed = calcSpeed([oldq.top, oldq.left], newq);
        $div.animate({
            top: newq[0],
            left: newq[1]
        }, speed, function () {
            animateDiv();
        });
    };
}
function makeNewPosition() {
    // Get viewport dimensions (remove the dimension of the div)
    var h = $(window).height() - 50;
    var w = $(window).width() - 50;
    var nh = Math.floor(Math.random() * h);
    var nw = Math.floor(Math.random() * w);
    return [nh, nw];
}
function calcSpeed(prev, next) {
    var x = Math.abs(prev[1] - next[1]);
    var y = Math.abs(prev[0] - next[0]);
    var greatest = x > y ? x : y;
    var speedModifier = .4;
    var speed = Math.ceil(greatest / speedModifier);
    return speed;
}
div.a {
    width: 50px;
    height:50px;
    background-color:red;
    position:fixed;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<div class="animatedDivs"></div>

我已经在这里为您更新了jsfiddle

只是简单地添加了这两行：

var newq = makeNewPosition();
var $div = $("<div class='a'>").css({top: newq[0], left: newq[1]});


$(document).ready(function () {
    newDiv();
    newDiv();
    newDiv();
    newDiv();
    newDiv();
    newDiv();
});
function newDiv() {
    var newq = makeNewPosition();
    var $div = $("<div class='a'>").css({top: newq[0], left: newq[1]});
    $(".animatedDivs").append($div);
    animateDiv();
    function animateDiv() {
        var newq = makeNewPosition();
        var oldq = $div.offset();
        var speed = calcSpeed([oldq.top, oldq.left], newq);
        $div.animate({
            top: newq[0],
            left: newq[1]
        }, speed, function () {
            animateDiv();
        });
    };
}
function makeNewPosition() {
    // Get viewport dimensions (remove the dimension of the div)
    var h = $(window).height() - 50;
    var w = $(window).width() - 50;
    var nh = Math.floor(Math.random() * h);
    var nw = Math.floor(Math.random() * w);
    return [nh, nw];
}
function calcSpeed(prev, next) {
    var x = Math.abs(prev[1] - next[1]);
    var y = Math.abs(prev[0] - next[0]);
    var greatest = x > y ? x : y;
    var speedModifier = .4;
    var speed = Math.ceil(greatest / speedModifier);
    return speed;
}
div.a {
    width: 50px;
    height:50px;
    background-color:red;
    position:fixed;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<div class="animatedDivs"></div>

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