# b2MassData Struct Reference

This holds the mass data computed for a shape. More...

`#include <b2Shape.h>`

List of all members.

## Public Attributes
float32 | mass
| The mass of the shape, usually in kilograms.
b2Vec2 | center
| The position of the shape's centroid relative to the shape's origin.
float32 | I
| The rotational inertia of the shape about the local origin.

## Detailed Description

This holds the mass data computed for a shape.

## Member Data Documentation

b2Vec2 b2MassData::center

The position of the shape's centroid relative to the shape's origin.

float32 b2MassData::I

The rotational inertia of the shape about the local origin.

float32 b2MassData::mass

The mass of the shape, usually in kilograms.

The documentation for this struct was generated from the following file:

- Box2D/Box2D/Collision/Shapes/b2Shape.h