blocks|key|4509591|text|这将是某种形式的epsilon来确定这个数字是否“小到微不足道”。在这种情况下，确切的值看起来就像是#defined。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4509592|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Epsilon^0|1E|7|8|7|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

It's going to be some form of <a href="http://en.wikipedia.org/wiki/Epsilon" rel="noreferrer">epsilon</a> to determine whether the number is "small enough to be insignificant". The exact value looks like it's being <code>#define</code>d somewhere in this case.

blocks|key|444862|text|EPS是epsilon。“足够接近”的因素。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|444863|问题是“绝对值是否足够接近？”其中“足够接近”是某个较小的数字，通常类似于1.0E-3。|offset|length|style|CODE|444864|根据算法如何收敛于答案，性能可能取决于EPS的大小。注意不要让EPS太小，因为你的过程可能会运行几个小时(或几个世纪)，而不会产生一个真正有用的答案。|444865|在这种情况下--没有循环--使用EPS，因为浮点数在乘法过程中积累了很小的误差。你不能简单地说|444866|a+==+b|code-block|syntax|javascript|444867|让它在一般情况下是真的。所以我们总是说|444868|abs(+a-b+)+<=+EPS|444869|entityMap^0|0|11|6|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|12|8|@]|9|@]|A|$O|P]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|N|7|14|8|@]|9|@]|A|$O|P]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

EPS is epsilon. The "close-enough" factor.

The question is "is the absolute value close enough?" Where "close enough" is some small number, often something like <code>1.0E-3</code>.

Depending on how the algorithm converges on the answer, the performance may depend on the size of EPS. Be careful of making EPS too small, because your process could run for hours (or centuries) and not produce a really usable answer.

In this case -- where there's no loop -- the EPS is used because floating point numbers accumulate small errors during multiplication. You can't simply say

<pre><code>a == b
</code></pre>

And have it be true in general. So instead we always say

<pre><code>abs( a-b ) &lt;= EPS
</code></pre>

blocks|key|3664588|text|我会说乔恩·斯基特是对的。通过查看该页面上的lisp代码，您将在计算中找到一个类似的引用，称为'nearzero‘，其定义如下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3664589|(setq+nearzero+0.00001)|code-block|syntax|javascript|3664590|因此，我认为EPS是一个设置为0.00001的常量。|3664591|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I would say Jon Skeet is correct. By looking at the lisp code on that page you will find a similar reference in the calculations called 'nearzero' which is defined as such:

<pre><code>(setq nearzero 0.00001)
</code></pre>

So from this I would say EPS is a constant set to 0.00001.

blocks|key|4509625|text|爱普西隆..。它可能会是一个#定义...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4509626|Epsilon通常用于表示浮点数或双精度范围内非常接近于零的数字。|4509627|它用于确定p43.x的值是否足够接近于零，可以算作零。|4509628|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Epsilon... It will probably be a #define...

Epsilon is typically used to denote a number very close to zero within the bounds of float or double accuracy. 

It's used to determine if the value of the p43.x is close enough to zero to be counted as zero.

blocks|key|1083823|text|我会说EPS是针对Epsilon的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1083824|1083825|在数学(特别是微积分)中，一个任意(或几乎如此)的小正数。|blockquote|1083826|1083827|1083828|在您的示例中，它用于确定(ABS(p43.x)的结果是否足够小(接近于零)。|1083829|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|M|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|N|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|O|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|P|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|Q|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|K|$]]

I will say that EPS is for Epsilon:

<blockquote>
 In mathematics (particularly calculus), an arbitrarily (or nearly so) small positive quantity.
</blockquote>

In you example it is used to determine if the result of (ABS(p43.x) is small enough (close to zero).

blocks|key|3664504|text|最有可能的是，p43是一个保存浮点值的结构。由于浮点值具有有限的精度，它们只能表示实数的一个子集，这意味着通常需要检查是否等于舍入误差的余量。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3664505|代码不检查x+=+0，而是检查%7Cx%7C+<+EPS，即]-EPS,+%2BEPS[中的所有值都被认为足够小，可以为0。|3664506|您还可以考虑阅读machine+epsilon上的内容。|3664507|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Machine_epsilon^0|7|3|0|5|5|F|9|Q|C|1I|1|0|8|F|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|13|8|@]|D|@$9|14|A|15|1|16]]|E|$]]|$1|J|3|-4|5|6|7|17|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]]]

Most likely, <code>p43</code> is a struct which holds floating point values. As floating point values have a finite precision, they can only represent a subset of the real numbers, which means it's often necessary to check equality with a margin for rounding errors.

Instead of checking <code>x = 0</code>, the code checks <code>|x| &lt; EPS</code>, ie all values in <code>]-EPS, +EPS[</code> are considered small enough to be <code>0</code>.

You might also consider reading up on the <a href="http://en.wikipedia.org/wiki/Machine_epsilon" rel="nofollow noreferrer">machine epsilon</a>.

blocks|key|4509894|text|在C和C%2B%2B中，预处理常量FLT_EPSILON和DBL_EPSILON是最小的数字，对于浮点数和双精度，1%2B+{FLT，DBL}_EPSILON+>1。这个EPS似乎是一些类似的应用特定的“接近于零”的值。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4509895|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In C and C++ you have the preprocessor constants FLT_EPSILON and DBL_EPSILON which are the smallest numbers such that 1 + {FLT,DBL}_EPSILON > 1 for float and double precision, respectively. This EPS seems to be some similar application specific "close to zero" value.

I have the following code snippet:

<pre><code>if (ABS(p43.x) &lt; EPS &amp;&amp; ABS(p43.y) &lt; EPS &amp;&amp; ABS(p43.z) &lt; EPS) return(FALSE);
</code></pre>

Which I'm trying to convert to C#. What does "EPS" mean?

This code is from <a href="http://local.wasp.uwa.edu.au/~pbourke/geometry/lineline3d/" rel="noreferrer">http://local.wasp.uwa.edu.au/~pbourke/geometry/lineline3d/</a>

What does EPS mean in C?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有以下代码片段：if (ABS(p43.x) < EPS && ABS(p43.y) < EPS && ABS(p43.z) < EPS) return(FALSE);我正在尝试将其转换为C#。"EPS“是什么意思？这段代码来自

问EPS在C中是什么意思？
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