Class Hash

This static class contains functions for calculating hashes from different Unity types.

All functions are deterministic and are well spread across the output range. This is not secure for cryptography.

Vectors are quantized before hashing - for each component of the vector, work out the closest fraction the number is and use that to seed the hashing algorithm. The size of the fraction is controlled by the quantizationResolution parameter.

Inheritance

System.Object

Hash

Inherited Members

System.Object.ToString()

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

Namespace: CarbideFunction.Wildtile

Syntax

public static class Hash

Methods

CycleShift(IntegerType, Int32)

Left-shift bits around a word, with no loss of data. All bits that flow off either end are added to the opposite end.

This allows the combination of hashes of several similar inputs by avoiding the collision of equal hashes. In particular, this is designed to support hashing Vector2s and Vector3s that should all be between -1 and 1.

Declaration

public static IntegerType CycleShift(IntegerType input, int leftShiftAmount)

Parameters

Type	Name	Description
IntegerType	input
System.Int32	leftShiftAmount

Returns

Type	Description
IntegerType

Int(IntegerType)

Hash an int.

Declaration

public static IntegerType Int(IntegerType seed)

Parameters

Type	Name	Description
IntegerType	seed

Returns

Type	Description
IntegerType

Long(Int64)

Hash a long to an int.

Declaration

public static IntegerType Long(long input)

Parameters

Type	Name	Description
System.Int64	input

Returns

Type	Description
IntegerType

QuantizedVector(Vector2, Single)

Hash a Vector2. Both components should be between -1 and 1 for a good hash spread, but all values can be hashed with a potentially poorer spread.

Declaration

public static IntegerType QuantizedVector(Vector2 vector, float quantizationResolution)

Parameters

Type	Name	Description
Vector2	vector	The vector to hash
System.Single	quantizationResolution	How finely should the vector be split up before hashing.

Returns

Type	Description
IntegerType

QuantizedVector(Vector3, Single)

Hash a Vector3. All components should be between -1 and 1 for a good hash spread, but all values can be hashed with a potentially poorer spread.

Declaration

public static IntegerType QuantizedVector(Vector3 vector, float quantizationResolution)

Parameters

Type	Name	Description
Vector3	vector	The vector to hash
System.Single	quantizationResolution	How finely should the vector be split up before hashing.

Returns

Type	Description
IntegerType

String(String)

Hash a string.

Declaration

public static IntegerType String(string input)

Parameters

Type	Name	Description
System.String	input

Returns

Type	Description
IntegerType