koobas.hobune.stream
Vector3.ToString
Hi I'm using the ToString method to convert a Vector3 to a string so I can save it to a text file. Unfortunately, when I do, it rounds the vector3 members and only save them to one decimal place. So Vector3 ( 0.454502f, 0.9543028f, 31.54063f ) becomes Vector3(0.5f, 0.1f, 31.5f)
Is there anyway to prevent this rounding?
Thanks!
Yes, the default behaviour is very annoying, and makes handling small values such as normalized Vectors, or Colors useless.
However, you can call ToString() explicitly and apply a formatting parameters yourself:
For example, probably the most useful option (which I wished was default!) Vector3 ( 0.4f, 0.9543028f, 31.54063f ).ToString("G4") will show up to 4 significant digits for every component, and will show as:
(0.4, 0.9543, 31.54)
The variant Vector3 ( 0.4f, 0.9543028f, 31.54063f ).ToString("F3") will always show 3 digits after the decimal point for every component, but again for very small numbers you'll lose precision. It will show as:
(0.400, 0.954, 31.541)
This works both in JavaScript and C#.
Then click the little "thumbs up" button to indicate the answer was helpful. That helps others to find it.
I left a comment since I do not have upvoting privileges! Unity's implementation of the stack exchange system is not very friendly to us newcomers...
I see. That's unfortunate. I've sadly moved on from my Unity project, but still get emails sometimes. I read this answer and was shocked it had never been upvoted. Now I now why.
I am surprised nobody suggested this, but the best option for @AntLewis is actually ToString("R")
R means "Round Trip" which is designed to ensure that the value later read from the string is the same as when it was serialized.
@GRobecchi : Interesting. However, note this suggestion in the .net docs: Note: Recommended for the BigInteger type only. For Double types, use "G17"; for Single types, use "G9".
You can also write a Vector3 expansion, like this:
using UnityEngine;
public static class Vector3Extension {
public static string Print(this Vector3 v) {
return v.ToString("G4");
}
}
Then you have a new method available for your Vector3's:
Vector3 v = new Vector3(0.0, 0.55421, 0.0);
UnityEngine.Debug.Log(v.Print());
You could write your own function to do it correctly:
function writeVectorProperly ( theV : Vector3 )
{
return "(" + theV.x + ", " + theV.y + ", " + theV.z + ")";
}
