我有:
document.elementFromPoint(12, 23);
什么是形象,我是如何看到X中心,如何协调形象? 相对而言?
我有:
document.elementFromPoint(12, 23);
什么是形象,我是如何看到X中心,如何协调形象? 相对而言?
ImageXCenter = ImageXPos + Math.abs( ImageWidth / ImageXPos ) / 2;
ImageYCenter = ImageYPos + Math.abs( ImageHeight / ImageYPos ) / 2;
应:
Fiddle: http://jsfiddle.net/9ex2V/。
function getCenter (e) {
var left = e.offsetLeft,
top = e.offsetTop,
parent = e;
while(parent = parent.offsetParent) {
left += parent.offsetLeft;
top += parent.offsetTop;
}
return [
left + Math.floor(e.offsetWidth / 2),
top + Math.floor(e.offsetHeight / 2)
];
}
我希望我没有忽略任何关于html/人/任何边界/婚生/婚礼的内容。
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