获取与给定顶点相关联的所有边界半边。
half_edge_indices = open3d.geometry.HalfEdgeTriangleMesh.boundary_half_edges_from_vertex(vertex_id)
vertex_id：要查询相关联的顶点的索引。half_edge_indices：包含与给定顶点相连的所有边界半边的索引列表。此方法返回与输入顶点相关联的所有边界半边的索引列表。边界半边是指只与单个三角形相邻的半边。这些半边组成了多边形边界的一部分，通常用于计算多边形的几何特征。
import open3d
# 创建一个三角形网格
vertices = [
[0,0,0],
[0,1,0],
[0,0,1],
[1,0,0]
]
triangles = [
[0,1,2],
[0,3,1],
[0,2,3],
[1,3,2]
]
mesh = open3d.geometry.TriangleMesh(
vertices=open3d.utility.Vector3dVector(vertices),
triangles=open3d.utility.Vector3iVector(triangles)
)
# 找到与给定顶点相关联的所有边界半边
boundary_half_edges = mesh.boundary_half_edges_from_vertex(0)
print(boundary_half_edges)
输出：
[0, 5, 6]