Represents a 128-bit hash value.
Use Hash128
to uniquely identify a piece of data. A 128-bit hash value has an extremely
low probability of hash collisions, so you can assume that if the hash values of two pieces of data are identical,
then the data is identical too. For example, to quickly determine whether texture pixel contents have changed, or
if they are identical between several textures, you can use Texture.imageContentsHash.
To compute the hash values for some data, use the Hash128.Compute function. To compute the hash
values incrementally for several pieces of data, use Hash128.Append.
using UnityEngine;
public class ExampleScript : MonoBehaviour { void Start() { var hash = new Hash128(); hash.Append(42); hash.Append(13.0f); hash.Append("Hello"); hash.Append(new int[] {1, 2, 3, 4, 5}); // prints "2d6e582c3fcfb4b8f3c16650a75dc37b" Debug.Log(hash.ToString()); } }
The hash algorithm used to compute Hash128
values is SpookyHash V2. Note that while this hash algorithm is quite fast to compute and has good hash distribution qualities, it is not a cryptographic hash function.
isValid | Returns true is the hash value is valid. (Read Only) |
Hash128 | Directly initialize a Hash128 with a 128-bit value. |
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.