Vector Field

Introduction

Vector fields and vector field definitions allow for storing vectors of floating point numbers. Such vectors are for example generated by an https://mediahaven.atlassian.net/wiki/spaces/CS/pages/4438720567 and used for https://mediahaven.atlassian.net/wiki/spaces/CS/pages/4434231329. An example of a vector with 4 dimensions is [0.5, -0.5, -0.5, -0.5].

Floating point

The vector is stored in the metadata as a hexadecimal string using the following conversion:

• Each floating point number is more precisely a 32-bit precision IEEE 754 floating point.

• Each floating point is converted to an 8-character hexadecimal string, e.g. 0.5 → 3F000000

• All 8-character hexadecimal strings are concatenated into a single string

• A vector with dimensions N will be stored as a hexadecimal string of length 8 * N

Example

The vector [0.5, -0.5, -0.5, -0.5] in hexadecimal form is 3F000000BF000000BF0000003F000000