比较Unity中的花车 [英] Compare floats in Unity

问题描述

我的场景中有6个InputFields。它们的内容类型是十进制的。

我从这些输入字段获取值，并检查它们的和是否等于100.02。

  float fireP = float.Parse（firePercentage.text）; 
 float waterP = float.Parse（waterPercentage.text）; 
 float lightP = float.Parse（lightPercentage.text）; 
 float nightP = float.Parse（nightPercentage.text）; 
 float natureP = float.Parse（naturePercentage.text）; 
 float healthP = float.Parse（healthPercentage.text）; 
 
 float total = fireP + waterP + lightP + nightP + natureP + healthP; 
 
 if（total == 100.02f）
 {
 Debug.Log（It's equal）; 
} 
 else 
 {
 Debug.Log（不等于，你的总和=+总数）; 
 
 
 
 $ b我在控制台中得到不等于你的总和= 100.02登录。 
无论如何有任何想法，为什么这可能会发生？          / code>  16.6700000762939453125 。
 
 $ b 最近的 float 到 10.02 是 100.01999664306640625  
 
 
 
前者本身5次并不等于后者，所以他们不会比较相等。
 
 
 
在这个特定的如果按照1e-6的顺序比较容忍度，那么可能就是这样。
 
I have 6 InputFields in my scene. Their content type is decimal.

I fetch values from these input fields and check if their sum is equal to 100.02. I enter 16.67 in all of them.
    float fireP   =  float.Parse(firePercentage.text);
    float waterP  =  float.Parse(waterPercentage.text);
    float lightP  =  float.Parse(lightPercentage.text);
    float nightP  =  float.Parse(nightPercentage.text);
    float natureP =  float.Parse(naturePercentage.text);
    float healthP =  float.Parse(healthPercentage.text);

    float total = fireP + waterP + lightP + nightP + natureP + healthP;

   if (total == 100.02f)
   {
     Debug.Log("It's equal");
   }
   else
   {
     Debug.Log(" Not equal. Your sum is = " + total);
   }
I am getting " Not equal. Your sum is = 100.02" in my console log.
Anyways has any idea why this might be happening ?  
解决方案
The nearest float to 16.67 is 16.6700000762939453125.

The nearest float to 10.02 is 100.01999664306640625

Adding the former to itself 5 times is not exactly equal to the latter, so they will not compare equal.

In this particular case, comparing with a tolerance in the order of 1e-6 is probably the way to go.

                        
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