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44 lines
1.0 KiB
Markdown
44 lines
1.0 KiB
Markdown
---
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title: mbcp.presets.model
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---
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### **class** `GeometricModels`
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### `@staticmethod`
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### *method* `sphere(radius: float, density: float)`
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**説明**: 生成球体上的点集。
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**變數説明**:
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> - radius:
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> - density:
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**返回**: List[Point3]: 球体上的点集。
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<details>
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<summary> <b>源碼</b> </summary>
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```python
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@staticmethod
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def sphere(radius: float, density: float):
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"""
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生成球体上的点集。
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Args:
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radius:
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density:
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Returns:
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List[Point3]: 球体上的点集。
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"""
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area = 4 * np.pi * radius ** 2
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num = int(area * density)
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phi_list = np.arccos([clamp(-1 + (2.0 * _ - 1.0) / num, -1, 1) for _ in range(num)])
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theta_list = np.sqrt(num * np.pi) * phi_list
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x_array = radius * np.sin(phi_list) * np.cos(theta_list)
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y_array = radius * np.sin(phi_list) * np.sin(theta_list)
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z_array = radius * np.cos(phi_list)
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return [Point3(x_array[i], y_array[i], z_array[i]) for i in range(num)]
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```
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</details>
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