使用jQuery滚动时的图像运动 [英] Image motion when scrolling using jquery
问题描述
有人可以建议一个教程/资源,也可以举一个使用jquery进行基本图像运动的示例.我已经通过Google搜索了几个星期,并尝试了各种教程和模板,但是我很难找到我认为简单的动画示例.
Can someone please suggest a tutorial/resource or give an example of basic image motion using jquery. I have been searching for a few weeks now via Google and trying various tutorials and templates and I am having difficulty finding an example of what I thought would be a simple animation.
我试图弄清楚如何创建效果,以便在您向下滚动页面时,一幅小图像从A点移动到B点.该运动可能是对角线,水平线,垂直线等.我只想指定开始位置和结束位置,然后滚动开始和结束以到达该目的地.
I am trying to figure out how to create an effect so as you scroll down the page, a small image moves from point A to point B. The motion could be diagonal, horizontal, vertical, etc. I just want to specify a start position and end position and scroll start and end to reach that destination.
这个想法是,我将拍摄一些不同的线框CAD图像,并产生爆炸的装配/重新装配滚动效果.向下滚动时,CAD装配爆炸.当您向上滚动时,过程将反向进行,装配将重新组装.
The idea is, I am going to take a few different wireframe CAD images and do an exploded assembly/reassembly scrolling effect. As you scroll down the CAD assembly explodes. As you scroll back up the process reverses and the assembly reassembles.
推荐答案
$(function() {
var animationData = [
{
id: "section1",
startX: 100,
startY: 50,
deltaX: +20,
deltaY: -5,
},
{
id: "section2",
startX: 75,
startY: 50,
deltaX: -20,
deltaY: -5,
},
{
id: "section3",
startX: 50,
startY: 75,
deltaX: -40,
deltaY: +15,
},
{
id: "section4",
startX: 75,
startY: 75,
deltaX: +30,
deltaY: +35,
},
];
// scrollTop() will be in the range of 0 to scrollMax
var scrollMax = $("#content").height() - $("#scrollarea").height();
var scrollArea$ = $("#scrollarea"); // cache ref for efficiency
// position objects and show
$("#section1").offset({ top: animationData[0].startY, left: animationData[0].startX});
$("#section2").offset({ top: animationData[1].startY, left: animationData[1].startX});
$("#section3").offset({ top: animationData[2].startY, left: animationData[2].startX});
$("#section4").offset({ top: animationData[3].startY, left: animationData[3].startX});
$(".section").show();
scrollArea$.scroll(function(){
var scrollPerc = scrollArea$.scrollTop() / scrollMax; // 0.0 to 1.0
var sec1Left = animationData[0].startX + (animationData[0].deltaX * scrollPerc);
var sec1Top = animationData[0].startY + (animationData[0].deltaY * scrollPerc);
var sec2Left = animationData[1].startX + (animationData[1].deltaX * scrollPerc);
var sec2Top = animationData[1].startY + (animationData[1].deltaY * scrollPerc);
var sec3Left = animationData[2].startX + (animationData[2].deltaX * scrollPerc);
var sec3Top = animationData[2].startY + (animationData[2].deltaY * scrollPerc);
var sec4Left = animationData[3].startX + (animationData[3].deltaX * scrollPerc);
var sec4Top = animationData[3].startY + (animationData[3].deltaY * scrollPerc);
$("#section1").offset({ top: sec1Top, left: sec1Left});
$("#section2").offset({ top: sec2Top, left: sec2Left});
$("#section3").offset({ top: sec3Top, left: sec3Left});
$("#section4").offset({ top: sec4Top, left: sec4Left});
});
});
.section {
position: absolute;
width: 25px;
height: 25px;
display: none;
}
#section1 {
background-color: red;
}
#section2 {
background-color: blue;
}
#section3 {
background-color: yellow;
}
#section4 {
background-color: green;
}
#content {
width: 100%;
height: 300px;
}
#scrollarea {
overflow-y: scroll;
width: 200px;
height: 200px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="scrollarea">
<div id="content">
<div id="section1" class="section"></div>
<div id="section2" class="section"></div>
<div id="section3" class="section"></div>
<div id="section4" class="section"></div>
</div>
</div>
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