mirror of
https://github.com/snowykami/mbcp.git
synced 2024-11-27 00:35:04 +08:00
341 lines
5.3 KiB
Markdown
341 lines
5.3 KiB
Markdown
|
---
|
|||
|
title: mbcp.mp\nmath.vector
|
|||
|
order: 1
|
|||
|
icon: laptop-code
|
|||
|
category: API
|
|||
|
---
|
|||
|
|
|||
|
### ***class*** `Vector3`
|
|||
|
|
|||
|
|
|||
|
|
|||
|
###   ***def*** `__init__(self, x: float, y: float, z: float) -> None`
|
|||
|
|
|||
|
 3维向量
|
|||
|
|
|||
|
Args:
|
|||
|
|
|||
|
x: x轴分量
|
|||
|
|
|||
|
y: y轴分量
|
|||
|
|
|||
|
z: z轴分量
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
def __init__(self, x: float, y: float, z: float):
|
|||
|
"""
|
|||
|
3维向量
|
|||
|
Args:
|
|||
|
x: x轴分量
|
|||
|
y: y轴分量
|
|||
|
z: z轴分量
|
|||
|
"""
|
|||
|
self.x = x
|
|||
|
self.y = y
|
|||
|
self.z = z
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***def*** `approx(self, other: 'Vector3', epsilon: float) -> bool`
|
|||
|
|
|||
|
 判断两个向量是否近似相等。
|
|||
|
|
|||
|
Args:
|
|||
|
|
|||
|
other:
|
|||
|
|
|||
|
epsilon:
|
|||
|
|
|||
|
|
|||
|
|
|||
|
Returns:
|
|||
|
|
|||
|
是否近似相等
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
def approx(self, other: 'Vector3', epsilon: float=APPROX) -> bool:
|
|||
|
"""
|
|||
|
判断两个向量是否近似相等。
|
|||
|
Args:
|
|||
|
other:
|
|||
|
epsilon:
|
|||
|
|
|||
|
Returns:
|
|||
|
是否近似相等
|
|||
|
"""
|
|||
|
return all([abs(self.x - other.x) < epsilon, abs(self.y - other.y) < epsilon, abs(self.z - other.z) < epsilon])
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***def*** `cal_angle(self, other: 'Vector3') -> 'AnyAngle'`
|
|||
|
|
|||
|
 计算两个向量之间的夹角。
|
|||
|
|
|||
|
Args:
|
|||
|
|
|||
|
other: 另一个向量
|
|||
|
|
|||
|
Returns:
|
|||
|
|
|||
|
夹角
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
def cal_angle(self, other: 'Vector3') -> 'AnyAngle':
|
|||
|
"""
|
|||
|
计算两个向量之间的夹角。
|
|||
|
Args:
|
|||
|
other: 另一个向量
|
|||
|
Returns:
|
|||
|
夹角
|
|||
|
"""
|
|||
|
return AnyAngle(math.acos(self @ other / (self.length * other.length)), is_radian=True)
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***def*** `cross(self, other: 'Vector3') -> 'Vector3'`
|
|||
|
|
|||
|
 向量积 叉乘:v1 cross v2 -> v3
|
|||
|
|
|||
|
|
|||
|
|
|||
|
叉乘为0,则两向量平行。
|
|||
|
|
|||
|
其余结果的模为平行四边形的面积。
|
|||
|
|
|||
|
|
|||
|
|
|||
|
返回如下行列式的结果:
|
|||
|
|
|||
|
|
|||
|
|
|||
|
``i j k``
|
|||
|
|
|||
|
|
|||
|
|
|||
|
``x1 y1 z1``
|
|||
|
|
|||
|
|
|||
|
|
|||
|
``x2 y2 z2``
|
|||
|
|
|||
|
|
|||
|
|
|||
|
Args:
|
|||
|
|
|||
|
other:
|
|||
|
|
|||
|
Returns:
|
|||
|
|
|||
|
行列式的结果
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
def cross(self, other: 'Vector3') -> 'Vector3':
|
|||
|
"""
|
|||
|
向量积 叉乘:v1 cross v2 -> v3
|
|||
|
|
|||
|
叉乘为0,则两向量平行。
|
|||
|
其余结果的模为平行四边形的面积。
|
|||
|
|
|||
|
返回如下行列式的结果:
|
|||
|
|
|||
|
``i j k``
|
|||
|
|
|||
|
``x1 y1 z1``
|
|||
|
|
|||
|
``x2 y2 z2``
|
|||
|
|
|||
|
Args:
|
|||
|
other:
|
|||
|
Returns:
|
|||
|
行列式的结果
|
|||
|
"""
|
|||
|
return Vector3(self.y * other.z - self.z * other.y, self.z * other.x - self.x * other.z, self.x * other.y - self.y * other.x)
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***def*** `is_approx_parallel(self, other: 'Vector3', epsilon: float) -> bool`
|
|||
|
|
|||
|
 判断两个向量是否近似平行。
|
|||
|
|
|||
|
Args:
|
|||
|
|
|||
|
other: 另一个向量
|
|||
|
|
|||
|
epsilon: 允许的误差
|
|||
|
|
|||
|
Returns:
|
|||
|
|
|||
|
是否近似平行
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
def is_approx_parallel(self, other: 'Vector3', epsilon: float=APPROX) -> bool:
|
|||
|
"""
|
|||
|
判断两个向量是否近似平行。
|
|||
|
Args:
|
|||
|
other: 另一个向量
|
|||
|
epsilon: 允许的误差
|
|||
|
Returns:
|
|||
|
是否近似平行
|
|||
|
"""
|
|||
|
return self.cross(other).length < epsilon
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***def*** `is_parallel(self, other: 'Vector3') -> bool`
|
|||
|
|
|||
|
 判断两个向量是否平行。
|
|||
|
|
|||
|
Args:
|
|||
|
|
|||
|
other: 另一个向量
|
|||
|
|
|||
|
Returns:
|
|||
|
|
|||
|
是否平行
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
def is_parallel(self, other: 'Vector3') -> bool:
|
|||
|
"""
|
|||
|
判断两个向量是否平行。
|
|||
|
Args:
|
|||
|
other: 另一个向量
|
|||
|
Returns:
|
|||
|
是否平行
|
|||
|
"""
|
|||
|
return self.cross(other).approx(zero_vector3)
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***def*** `normalize(self) -> None`
|
|||
|
|
|||
|
 将向量归一化。
|
|||
|
|
|||
|
|
|||
|
|
|||
|
自体归一化,不返回值。
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
def normalize(self):
|
|||
|
"""
|
|||
|
将向量归一化。
|
|||
|
|
|||
|
自体归一化,不返回值。
|
|||
|
"""
|
|||
|
length = self.length
|
|||
|
self.x /= length
|
|||
|
self.y /= length
|
|||
|
self.z /= length
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***@property***
|
|||
|
###   ***def*** `np_array(self: Any) -> 'np.ndarray'`
|
|||
|
|
|||
|
 返回numpy数组
|
|||
|
|
|||
|
Returns:
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
@property
|
|||
|
def np_array(self) -> 'np.ndarray':
|
|||
|
"""
|
|||
|
返回numpy数组
|
|||
|
Returns:
|
|||
|
"""
|
|||
|
return np.array([self.x, self.y, self.z])
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***@property***
|
|||
|
###   ***def*** `length(self: Any) -> float`
|
|||
|
|
|||
|
 向量的模。
|
|||
|
|
|||
|
Returns:
|
|||
|
|
|||
|
模
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
@property
|
|||
|
def length(self) -> float:
|
|||
|
"""
|
|||
|
向量的模。
|
|||
|
Returns:
|
|||
|
模
|
|||
|
"""
|
|||
|
return math.sqrt(self.x ** 2 + self.y ** 2 + self.z ** 2)
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
###   ***@property***
|
|||
|
###   ***def*** `unit(self: Any) -> 'Vector3'`
|
|||
|
|
|||
|
 获取该向量的单位向量。
|
|||
|
|
|||
|
Returns:
|
|||
|
|
|||
|
单位向量
|
|||
|
|
|||
|
<details>
|
|||
|
<summary>源代码</summary>
|
|||
|
|
|||
|
```python
|
|||
|
@property
|
|||
|
def unit(self) -> 'Vector3':
|
|||
|
"""
|
|||
|
获取该向量的单位向量。
|
|||
|
Returns:
|
|||
|
单位向量
|
|||
|
"""
|
|||
|
return self / self.length
|
|||
|
```
|
|||
|
</details>
|
|||
|
|
|||
|
### ***var*** `zero_vector3 = Vector3(0, 0, 0)`
|
|||
|
|
|||
|
|
|||
|
|
|||
|
### ***var*** `x_axis = Vector3(1, 0, 0)`
|
|||
|
|
|||
|
|
|||
|
|
|||
|
### ***var*** `y_axis = Vector3(0, 1, 0)`
|
|||
|
|
|||
|
|
|||
|
|
|||
|
### ***var*** `z_axis = Vector3(0, 0, 1)`
|
|||
|
|
|||
|
|
|||
|
|
|||
|
### ***var*** `length = self.length`
|
|||
|
|
|||
|
|
|||
|
|