2024-08-28 10:52:17 +08:00
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---
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2024-08-28 12:02:30 +08:00
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title: mbcp.mp_math.utils
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2024-08-28 10:52:17 +08:00
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---
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2024-08-28 22:07:43 +08:00
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### *func* `clamp() -> float`
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2024-08-28 10:52:17 +08:00
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2024-08-28 22:07:43 +08:00
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区间限定函数
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2024-08-28 10:52:17 +08:00
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2024-08-28 22:07:43 +08:00
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**参数**:
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2024-08-28 10:52:17 +08:00
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- x: 待限定的值
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- min_: 最小值
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2024-08-28 10:52:17 +08:00
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- max_: 最大值
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**返回**:
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- 限制后的值
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2024-08-28 10:52:17 +08:00
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<details>
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2024-08-28 22:07:43 +08:00
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<summary> <i>源代码</i> </summary>
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2024-08-28 10:52:17 +08:00
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```python
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def clamp(x: float, min_: float, max_: float) -> float:
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"""
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2024-08-28 22:07:43 +08:00
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区间限定函数
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2024-08-28 10:52:17 +08:00
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Args:
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2024-08-28 22:07:43 +08:00
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x: 待限定的值
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min_: 最小值
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max_: 最大值
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2024-08-28 10:52:17 +08:00
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Returns:
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限制后的值
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"""
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return max(min(x, max_), min_)
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```
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</details>
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2024-08-28 22:07:43 +08:00
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### *func* `approx(x: float = 0.0, y: float = APPROX) -> bool`
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2024-08-28 10:52:17 +08:00
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2024-08-28 12:02:30 +08:00
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判断两个数是否近似相等。或包装一个实数,用于判断是否近似于0。
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2024-08-28 10:52:17 +08:00
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2024-08-28 22:07:43 +08:00
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**参数**:
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- x: 数1
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- y: 数2
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- epsilon: 误差
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**返回**:
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- 是否近似相等
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2024-08-28 10:52:17 +08:00
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<details>
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2024-08-28 22:07:43 +08:00
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<summary> <i>源代码</i> </summary>
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2024-08-28 10:52:17 +08:00
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```python
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def approx(x: float, y: float=0.0, epsilon: float=APPROX) -> bool:
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"""
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判断两个数是否近似相等。或包装一个实数,用于判断是否近似于0。
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Args:
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x: 数1
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y: 数2
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epsilon: 误差
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Returns:
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是否近似相等
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"""
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return abs(x - y) < epsilon
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```
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</details>
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2024-08-28 22:07:43 +08:00
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### *func* `sign(x: float = False) -> str`
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2024-08-28 10:52:17 +08:00
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获取数的符号。
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2024-08-28 22:07:43 +08:00
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**参数**:
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2024-08-28 21:27:52 +08:00
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- x: 数
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- only_neg: 是否只返回负数的符号
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**返回**:
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- 符号 + - ""
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2024-08-28 10:52:17 +08:00
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<details>
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2024-08-28 22:07:43 +08:00
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<summary> <i>源代码</i> </summary>
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2024-08-28 10:52:17 +08:00
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```python
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def sign(x: float, only_neg: bool=False) -> str:
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"""获取数的符号。
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Args:
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x: 数
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only_neg: 是否只返回负数的符号
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Returns:
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符号 + - ""
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"""
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if x > 0:
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return '+' if not only_neg else ''
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elif x < 0:
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return '-'
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else:
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return ''
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```
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</details>
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### *func* `sign_format(x: float = False) -> str`
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格式化符号数
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-1 -> -1
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1 -> +1
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0 -> ""
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2024-08-28 22:07:43 +08:00
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**参数**:
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2024-08-28 21:27:52 +08:00
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- x: 数
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2024-08-28 21:27:52 +08:00
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- only_neg: 是否只返回负数的符号
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2024-08-28 10:52:17 +08:00
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2024-08-28 22:07:43 +08:00
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**返回**:
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- 符号 + - ""
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2024-08-28 10:52:17 +08:00
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<details>
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2024-08-28 22:07:43 +08:00
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<summary> <i>源代码</i> </summary>
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2024-08-28 10:52:17 +08:00
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```python
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def sign_format(x: float, only_neg: bool=False) -> str:
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"""格式化符号数
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-1 -> -1
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1 -> +1
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0 -> ""
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Args:
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x: 数
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only_neg: 是否只返回负数的符号
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Returns:
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符号 + - ""
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"""
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if x > 0:
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return f'+{x}' if not only_neg else f'{x}'
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elif x < 0:
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return f'-{abs(x)}'
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else:
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return ''
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```
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</details>
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### **class** `Approx`
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### *method* `__init__(self, value: RealNumber)`
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<details>
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2024-08-28 22:07:43 +08:00
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<summary> <i>源代码</i> </summary>
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2024-08-28 10:52:17 +08:00
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```python
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def __init__(self, value: RealNumber):
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self.value = value
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```
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</details>
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### *method* `__eq__(self, other)`
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<details>
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2024-08-28 22:07:43 +08:00
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<summary> <i>源代码</i> </summary>
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2024-08-28 12:02:30 +08:00
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```python
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def __eq__(self, other):
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if isinstance(self.value, (float, int)):
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if isinstance(other, (float, int)):
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return abs(self.value - other) < APPROX
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else:
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self.raise_type_error(other)
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elif isinstance(self.value, Vector3):
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if isinstance(other, (Vector3, Point3, Plane3, Line3)):
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return all([approx(self.value.x, other.x), approx(self.value.y, other.y), approx(self.value.z, other.z)])
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else:
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self.raise_type_error(other)
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```
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</details>
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### *method* `raise_type_error(self, other)`
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<details>
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2024-08-28 22:07:43 +08:00
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<summary> <i>源代码</i> </summary>
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2024-08-28 10:52:17 +08:00
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```python
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def raise_type_error(self, other):
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raise TypeError(f'Unsupported type: {type(self.value)} and {type(other)}')
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```
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</details>
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### *method* `__ne__(self, other)`
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<details>
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2024-08-28 22:07:43 +08:00
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<summary> <i>源代码</i> </summary>
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2024-08-28 12:02:30 +08:00
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```python
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def __ne__(self, other):
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return not self.__eq__(other)
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```
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</details>
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