## C Specification

A four-dimensional or homogeneous vector is defined by the XrVector4f structure:

``````typedef struct XrVector4f {
float    x;
float    y;
float    z;
float    w;
} XrVector4f;``````

## Members

Member Descriptions
• `x` is the x coordinate of the vector.

• `y` is the y coordinate of the vector.

• `z` is the z coordinate of the vector.

• `w` is the w coordinate of the vector.

## Description

If used to represent physical distances, `x`, `y`, and `z` values must be in meters.