Floating point precision problem of Debug.Log function in Unity3d

Transferred from: http://blog.sina.com.cn/s/blog_5d76edd80101iwib.html

You often use the Debug.Log function to print the value of a variable in a program and find that it displays only one decimal place.
This is really too low, like a 0.0xxxxx this decimal is 0.0!!!!!!
The error is too big.
Google, confirming that it is a problem with the Debug.Log function, it is truncated when the vector is turned into a string.
The accuracy can be controlled using the following method:

Debug.Log (VEC. ToString ("F4"))

Reference here: http://answers.unity3d.com/questions/173094/show-vector3-full-float-value.html

When you pass a vector to Debug.Log, I suspect Debug.Log calls the vector ' s ToString ()-method String value out of the argument, the it can write to the console. and the vector3.tostring () is implemented simply rounds the values to 1 decimal.

To get around this issue, you can either pass in the vector ' s coordinates individually, or you can use the overload of ToS Tring that accepts a format, to determine how many decimal points you want the vector represented in. You can use it like this, for example:

Vector3 point = new Vector3 (0.9887f, 1.56789f, 3.09273475f);
Debug.Log (point. ToString ("F4"));

Here, the F means your ' re talking about Fixed-point, and the 4 means you want 4 decimals. You can pass in any number instead of 4. See http://msdn.microsoft.com/en-us/library/dwhawy9k.aspx for further information on what to pass to ToString (string form at).