Struct Vector 

pub struct Vector {
    pub x: f64,
    pub y: f64,
}

二维向量。

Fields

x: f64

X 分量。

y: f64

Y 分量。

Implementations

impl Vector

pub const fn new(x: f64, y: f64) -> Self

创建一个二维向量。

pub fn is_finite(self) -> bool

判断分量是否都是有限数值。

pub fn length(self) -> f64

返回向量长度。

pub const fn length_squared(self) -> f64

返回向量长度的平方。

pub const fn dot(self, other: Vector) -> f64

返回两个向量的点积。

pub const fn cross(self, other: Vector) -> f64

返回两个向量的二维叉积。

pub fn normalized(self) -> Option<Vector>

返回单位向量；零长度或非有限向量返回 None。

pub fn angle_between(self, other: Vector) -> Option<f64>

返回两个向量之间的夹角，单位为弧度。

Trait Implementations

impl Add<Vector> for Point

点加向量，得到平移后的点

type Output = Point

The resulting type after applying the + operator.

fn add(self, rhs: Vector) -> Self::Output

Performs the + operation.

impl Add for Vector

两个向量相加，得到叠加后的合成向量。

type Output = Vector

The resulting type after applying the + operator.

fn add(self, rhs: Vector) -> Self::Output

Performs the + operation.

impl Clone for Vector

fn clone(&self) -> Vector

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Vector

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

Formats the value using the given formatter.

impl Default for Vector

fn default() -> Vector

Returns the “default value” for a type.

impl Div<f64> for Vector

向量除以标量，得到按该标量倒数缩放后的向量。

type Output = Vector

The resulting type after applying the / operator.

fn div(self, rhs: f64) -> Self::Output

Performs the / operation.

impl Mul<Vector> for f64

标量乘以向量，得到按该倍数缩放后的向量。

type Output = Vector

The resulting type after applying the * operator.

fn mul(self, rhs: Vector) -> Self::Output

Performs the * operation.

impl Mul<f64> for Vector

向量乘以标量，得到按该倍数缩放后的向量。

type Output = Vector

The resulting type after applying the * operator.

fn mul(self, rhs: f64) -> Self::Output

Performs the * operation.

impl Neg for Vector

对向量取负，得到方向相反、长度相同的向量。

type Output = Vector

The resulting type after applying the - operator.

fn neg(self) -> Self::Output

Performs the unary - operation.

impl PartialEq for Vector

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Sub<Vector> for Point

点减向量，得到反向平移后的点。

type Output = Point

The resulting type after applying the - operator.

fn sub(self, rhs: Vector) -> Self::Output

Performs the - operation.

impl Sub for Vector

两个向量相减，得到左侧向量相对右侧向量的差向量

type Output = Vector

The resulting type after applying the - operator.

fn sub(self, rhs: Vector) -> Self::Output

Performs the - operation.

impl Copy for Vector

impl StructuralPartialEq for Vector