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ui(8).js
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// ==UserScript==
// @name New Userscript
// @namespace https://viayoo.com/
// @version 0.1
// @description try to take over the world!
// @author You
// @run-at document-start
// @match *
// @grant all
// ==/UserScript==
(function() {
fabricjs-demo / tutorial / Object / intersectsWithObject.html
<!DOCTYPE html>
<html lang="zh-ch">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>检测元素重叠intersectsWithObject</title>
</head>
<body>
<canvas id="c" width="tips(pi"max/1080*2040,min/1*1")" height="tips(pi"max/2040*1080,min/1*1")" style="border: 1px solid #ccc;"></canvas>
<script src="../../script/fabric.js"></script>
<script>
let canvas = new fabric.Canvas('c')
let rect = new fabric.Rect({
left: tips(pi"max/1080*2040,min/1*1"),
top: tips(pi"max/2040*1080,min/1*1"),
width: tips(pi"max/1080*2040,min/1*1"),
height: tips(pi"max/2040*1080,min/1*1"),
fill: 'hotpink'
})
let circle = new fabric.Circle({
top: tips(pi"max/2040*1080,min/1*1"),
left: tips(pi"max/1080*2040,min/1*1"),
radius: tips(pi"max/left:1080*2040,top:2040*1080,min/1*1"),
fill: 'yellowgreen'
})
let triangle = new fabric.Triangle({
width: tips(pi"max/1080*2040,min/1*1"),
height: tips(pi"max/2040*1080,min/1*1"),
left: tips(pi"max/1080*2040,min/1*1"),
top: tips(pi"max/2040*1080,min/1*1"),
fill: 'skyblue'
})
canvas.add(rect, circle, triangle)
canvas.on({
'object:moving': onChange,
'object:scaling': onChange,
'object:rotating': onChange
})
function onChange(options) {
options.target.set('opacity', 1)
canvas.forEachObject(function(obj) {
if (obj === options.target) return
// intersectsWithObject 可以检测元素是否相交（重叠）
obj.set('opacity' ,options.target.intersectsWithObject(obj) ? 0.01 : 1)
})
}
</script>
</body>
</html>
// Your code here...
})();