Converting points and surfaces

In this notebook we will sample points from a surface and convert the point cloud back into a surface.

import napari_process_points_and_surfaces as nppas
import vedo
import napari

viewer = napari.Viewer(ndisplay=3)

def hide_all(viewer):
    for layer in viewer.layers:
        layer.visible = False
        
def show_all(viewer):
    for layer in viewer.layers:
        layer.visible = True

mesh = vedo.load("../../data/branchoid.ply")
surface = nppas.to_napari_surface_data(mesh)

surface_layer = viewer.add_surface(surface)

napari.utils.nbscreenshot(viewer)

Creating point clouds

We can create a point cloud from the surface. The points are located on the surface and not inside the volume.

point_cloud = nppas.sample_points_from_surface(surface, distance_fraction=0.01)
point_cloud

array([[26. , 44. , 46.5],
       [26. , 43.5, 48. ],
       [26. , 43.5, 50. ],
       ...,
       [74.5, 55. , 52. ],
       [74.5, 56. , 49. ],
       [74.5, 56. , 51. ]], dtype=float32)

hide_all(viewer)

points_layer = viewer.add_points(point_cloud, size=1)

napari.utils.nbscreenshot(viewer)