查看路径：
import os
os.getcwd()
open3d
import open3d as o3d
import numpy as np
print("Open3D read Point Cloud")
pcd=o3d.io.read_point_cloud(r"bunny10k.ply")
print(pcd)
o3d.visualization.draw_geometries([pcd],width=800,height=600)
open3d的功能查看“print(dir(o3d))
import open3d as o3d
import numpy as np
print("Open3D read Point Cloud")
pcd = o3d.io.read_point_cloud(r"bunny10k.ply")
pcd.paint_uniform_color([0.5, 0.5, 0.5])
pcd_tree = o3d.geometry.KDTreeFlann(pcd)
# pcd.colors[100] = [1, 0, 0]
[k, idx, _] = pcd_tree.search_knn_vector_3d(pcd.points[100],100)
np.asarray(pcd.colors)[idx[1:], :] = [0, 1, 0]
# # [k,idx,_] = pcd_tree.search_radius_vector_3d(pcd.points[3000],0.1) #索引半径小于0.02
# # np.asarray(pcd.colors)[idx[1:], :] = [0, 0, 1]
# o3d.visualization.draw_geometries([pcd],width=1200,height=1000)
pcd.colors[2000]=[1, 0, 0]
[k2, idx2, _]=pcd_tree.search_hybrid_vector_3d(pcd.points[2000],0.05,200)
np.asarray(pcd.colors)[idx2[1:], :] = [0, 1, 0.8]
o3d.visualization.draw_geometries([pcd],width=1200,height=1000)
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import open3d as o3d
import numpy as np
print("Open3D read Point Cloud")
pcd = o3d.io.read_point_cloud(r"bunny10k.ply")
print(pcd)
dumppcd = pcd.voxel_down_sample(voxel_size=0.01) #下采样（降采样）
dumppcd.estimate_normals(search_param=o3d.geometry.KDTreeSearchParamHybrid(radius=0.01,max_nn=30))
print(dumppcd.normals[0])
print(np.asarray(dumppcd.normals)[:10,:])
o3d.visualization.draw_geometries([dumppcd],point_show_normal=True,
window_name="法线估计", width=1200,height=1000, mesh_show_back_face=False)
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import open3d as o3d
import numpy as np
print("Open3D read Point Cloud")
pcd = o3d.io.read_point_cloud(r"bunny10k.ply") #newrabbit.pcd")
print(pcd)
o3d.visualization.draw_geometries([pcd])
trimesh = o3d.geometry.TriangleMesh.create_from_point_cloud_alpha_shape(pcd,0.03)
print(trimesh)
o3d.visualization.draw_geometries([trimesh])
trimesh.compute_vertex_normals()
o3d.visualization.draw_geometries([trimesh],mesh_show_back_face=True)
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import open3d as o3d
# import open3d_tutorial as o3dtut
import numpy as np
print("Open3D read Point Cloud")
pcd = o3d.io.read_triangle_mesh(r"bunny10k.ply") #newrabbit.pcd")
print(pcd)
pcd.compute_vertex_normals()
pcdmesh = pcd.sample_points_poisson_disk(3000)
o3d.visualization.draw_geometries([pcdmesh],point_show_normal=True)
radii=[0.005, 0.01, 0.02, 0.04]
ballmesh = o3d.geometry.TriangleMesh.create_from_point_cloud_ball_pivoting(pcdmesh,o3d.utility.DoubleVector(radii))
print(ballmesh)
o3d.visualization.draw_geometries([ballmesh])
o3d.visualization.draw_geometries([pcd, ballmesh])
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