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<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="utf-8" />
<base href="../../" />
<script src="list.js"></script>
<script src="page.js"></script>
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<body>
<h1>差异化支持(腻子)</h1>
<p class="desc">Three.js 包含以下方法和常量的差异化支持.</p>
<h3>[page:Number.EPSILON Number.EPSILON]</h3>
<p>
表示1和大于1的最小差值，可表示为 Number.
[link:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON MDN reference].
</p>
<h3>[page:Math.sign Math.sign]( [page:Number x] )</h3>
<p>
如果参数为 正数，负数，正零 或 负零,
该方法将分别返回 1, -1, 0 或 -0 . 否则, 返回 NaN.
[link:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign MDN reference].
</p>
<h3>[page:Function.prototype.name Function.prototype.name]( [page:Number x] )</h3>
<p>
返回方法的名字, 或 (在 ES6 实现之前) 为匿名方法返回一个空字符串.
[link:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name MDN reference].
</p>
<h3>[page:Object.assign Object.assign]( [page:Object target], [page:Object ...sources] )</h3>
<p>
Object.assign() 方法用于从一个或多个源对象拷贝所有可枚举自身属性到目标对象.
该方法将返回目标对象.
[link:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign MDN reference].
</p>
<h2>源码</h2>
<p>
[link:https://github.com/mrdoob/three.js/blob/master/src/polyfills.js src/polyfills.js]
</p>
</body>
</html>
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