Struct MassProperties 

pub struct MassProperties {
    pub inv_mass: f32,
    pub inv_inertia: Vec3,
}

How a Body’s mass is distributed: inverse mass and inverse diagonal inertia. Body 的质量分布：逆质量与逆惯量对角阵。

The inertia is stored as three inverse values along the Body’s local axes. Every supported Shape is symmetric about its local axes, so a diagonal tensor is exact and a full 3x3 matrix is never needed. 惯量以沿 Body 局部轴的三组逆值存储。所有受支持的 Shape 都关于局部轴对称，因此 对角阵是精确的，永远不需要完整的 3x3 矩阵。

Fields

inv_mass: f32

Inverse mass. Zero means nothing can accelerate the Body. 逆质量。为零表示没有任何东西能加速该 Body。

inv_inertia: Vec3

Inverse inertia per local axis. A zero component means the Body does not resist rotation about that axis. 局部各轴的逆惯量。某分量为零表示 Body 不抵抗绕该轴的旋转。

Implementations

impl MassProperties

pub const IMMOVABLE: Self

The properties of a Body that nothing can accelerate. 没有任何东西能加速的 Body 的质量属性。

pub fn is_immovable(&self) -> bool

Whether this Body can be accelerated at all. 该 Body 是否根本不能被加速。

Trait Implementations

impl Clone for MassProperties

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for MassProperties

impl Debug for MassProperties

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for MassProperties

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MassProperties