Polygon 多边形示例

import vtk

points = vtk.vtkPoints()
points.InsertNextPoint(0, 0, 0)
points.InsertNextPoint(1, 0, 0)
points.InsertNextPoint(1, 1, 0)
points.InsertNextPoint(0, 1, 0)

polygon = vtk.vtkPolygon()
polygon.GetPointIds().SetNumberOfIds(4)
for i in range(4):
    polygon.GetPointIds().SetId(i, i)

cells = vtk.vtkCellArray()
cells.InsertNextCell(polygon)

polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetPolys(cells)