# noise_hash proc

Source: https://ref.dm-lang.org/proc/noise_hash
Added in BYOND 515.

### Format
- `noise_hash(num1, num2, num3...)`
- `noise_hash(list_of_nums)`
- `noise_hash(hash_name, num1, num2, num3...)`
- `noise_hash(hash_name, list_of_nums)`


### Returns
> A number between 0 and 1 (excluding 1 itself)

### Args
- `num1, num2, num3...`: Numbers to be hashed (at least one)
- `list_of_nums`: A list containing the numbers to hash
- `hash_name`: A text string indicating the hash type (reserved for future use)


For some games using concepts of procedural generation, it's nice to be able to reliably create pseudo-random numbers in a repeatable, reliable way. This proc takes all the numbers put into it and hashes them together to get a value from 0 to 1. That output value will be the same for any given set of input numbers. This can be used on its own or as part of a more in-depth noise algorithm.

If the first argument is a string, that may be used in future versions to specify the type of hash to use. For now it is not used.

Non-numbers provided to the proc will be interpreted arbitrarily. Don't do that.

### See also
- [rand proc](https://ref.dm-lang.org/proc/rand.md)
- [rand_seed proc](https://ref.dm-lang.org/proc/rand_seed.md)