Wrapping Other Objects

You can wrap several other object types using pyvista including:

• numpy arrays

• trimesh.Trimesh meshes

• VTK objects

This allows for the “best of both worlds” programming special to Python due to its modularity. If there’s some limitation of pyvista (or trimesh), then you can adapt your scripts to use the best features of more than one module.

Wrap a point cloud composed of random points from numpy

import numpy as np

import pyvista as pv

rng = np.random.default_rng(seed=0)
points = rng.random((30, 3))
cloud = pv.wrap(points)
pv.plot(
    cloud,
    scalars=points[:, 2],
    render_points_as_spheres=True,
    point_size=50,
    opacity=points[:, 0],
    cpos='xz',
)

Wrap an instance of Trimesh

import trimesh

points = [[0, 0, 0], [0, 0, 1], [0, 1, 0]]
faces = [[0, 1, 2]]
tmesh = trimesh.Trimesh(points, faces=faces, process=False)
mesh = pv.wrap(tmesh)
print(mesh)

PolyData (0x7f8bb30bd660)
  N Cells:    1
  N Points:   3
  N Strips:   0
  X Bounds:   0.000e+00, 0.000e+00
  Y Bounds:   0.000e+00, 1.000e+00
  Z Bounds:   0.000e+00, 1.000e+00
  N Arrays:   0

Wrap an instance of vtk.vtkPolyData

import vtk

points = vtk.vtkPoints()
p = [1.0, 2.0, 3.0]
vertices = vtk.vtkCellArray()
pid = points.InsertNextPoint(p)
vertices.InsertNextCell(1)
vertices.InsertCellPoint(pid)
point = vtk.vtkPolyData()
point.SetPoints(points)
point.SetVerts(vertices)
mesh = pv.wrap(point)
print(mesh)

PolyData (0x7f8bb32853c0)
  N Cells:    1
  N Points:   1
  N Strips:   0
  X Bounds:   1.000e+00, 1.000e+00
  Y Bounds:   2.000e+00, 2.000e+00
  Z Bounds:   3.000e+00, 3.000e+00
  N Arrays:   0

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