现有stl三维不规则形状颗粒的文件模型请编写一段计算这个stl三维颗粒模型的圆度球形度内径比矩形度棱角性的代码

要计算STL三维颗粒模型的圆度、球形度、内径比、矩形度和棱角性，需要进行一系列的几何计算。以下是一种可能的实现方式：

import numpy as np
from scipy.spatial import ConvexHull

def calculate_roundness(vertices):
    # 计算圆度
    hull = ConvexHull(vertices)
    volume = hull.volume
    surface_area = hull.area
    roundness = (36 * np.pi * volume) / (surface_area ** 2)
    return roundness

def calculate_sphericity(vertices):
    # 计算球形度
    hull = ConvexHull(vertices)
    volume = hull.volume
    sphere_volume = (4/3) * np.pi * (hull.equations[0, 3] ** 3)
    sphericity = volume / sphere_volume
    return sphericity

def calculate_inner_diameter_ratio(vertices):
    # 计算内径比
    hull = ConvexHull(vertices)
    max_distance = 0
    for i, vertex_i in enumerate(hull.vertices[:-1]):
        for vertex_j in hull.vertices[i+1:]:
            distance = np.linalg.norm(vertices[vertex_i] - vertices[vertex_j])
            if distance > max_distance:
                max_distance = distance
    inner_diameter = max_distance
    diameter = np.sqrt(hull.equations[0, 3])
    inner_diameter_ratio = inner_diameter / diameter
    return inner_diameter_ratio

def calculate_rectangularity(vertices):
    # 计算矩形度
    hull = ConvexHull(vertices)
    volume = hull.volume
    rectangular_volume = hull.area * (3/2 * np.mean(hull.equations[:, 3]))
    rectangularity = volume / rectangular_volume
    return rectangularity

def calculate_edge_sharpness(vertices):
    # 计算棱角性
    hull = ConvexHull(vertices)
    num_edges = len(hull.simplices)
    num_vertices = len(hull.vertices)
    edge_sharpness = num_edges / num_vertices
    return edge_sharpness

# 示例使用
# 读取STL文件模型并提取顶点信息
vertices = np.array([[0, 0, 0], [1, 0, 0], [1, 1, 0], [0, 1, 0], [0, 0, 1], [1, 0, 1], [1, 1, 1], [0, 1, 1]])
roundness = calculate_roundness(vertices)
sphericity = calculate_sphericity(vertices)
inner_diameter_ratio = calculate_inner_diameter_ratio(vertices)
rectangularity = calculate_rectangularity(vertices)
edge_sharpness = calculate_edge_sharpness(vertices)

print("圆度:", roundness)
print("球形度:", sphericity)
print("内径比:", inner_diameter_ratio)
print("矩形度:", rectangularity)
print("棱角性:", edge_sharpness)

需要注意的是，这里假设STL文件模型中的顶点信息以Numpy数组的形式提供。如果实际情况不同，可以根据实际情况进行调整。此外，代码中的计算方法仅提供了一种可能的实现方式，具体的计算公式可以根据需求进行调整