多种方法实现Python中vtkXMLPolyDataWriter()的使用及示例代码

在Python中使用vtkXMLPolyDataWriter()可以将PolyData数据写入XML格式的文件中。vtkXMLPolyDataWriter是vtkPolyDataWriter的子类，用于将vtkPolyData对象写入XML格式的文件中。

以下是几种实现vtkXMLPolyDataWriter的方法及示例代码：

方法一：创建vtkXMLPolyDataWriter对象，设置输入数据并将数据写入文件中。

import vtk

def write_polydata(polydata, filename):
    writer = vtk.vtkXMLPolyDataWriter()
    writer.SetFileName(filename)
    writer.SetInputData(polydata)
    writer.Write()

# 创建PolyData数据
points = vtk.vtkPoints()
points.InsertNextPoint(0, 0, 0)
points.InsertNextPoint(1, 0, 0)
points.InsertNextPoint(0, 1, 0)

vertices = vtk.vtkCellArray()
vertices.InsertNextCell(3)
vertices.InsertCellPoint(0)
vertices.InsertCellPoint(1)
vertices.InsertCellPoint(2)

polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetVerts(vertices)

# 将PolyData数据写入文件
write_polydata(polydata, "output.vtp")

方法二：使用vtkXMLPolyDataWriter的静态方法写入PolyData数据。

import vtk

# 创建PolyData数据
points = vtk.vtkPoints()
points.InsertNextPoint(0, 0, 0)
points.InsertNextPoint(1, 0, 0)
points.InsertNextPoint(0, 1, 0)

vertices = vtk.vtkCellArray()
vertices.InsertNextCell(3)
vertices.InsertCellPoint(0)
vertices.InsertCellPoint(1)
vertices.InsertCellPoint(2)

polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetVerts(vertices)

# 将PolyData数据写入文件
vtk.vtkXMLPolyDataWriter.WritePolyData(polydata, "output.vtp")

方法三：使用vtkXMLPolyDataWriter的静态方法同时设置文件名和输入数据。

import vtk

# 创建PolyData数据
points = vtk.vtkPoints()
points.InsertNextPoint(0, 0, 0)
points.InsertNextPoint(1, 0, 0)
points.InsertNextPoint(0, 1, 0)

vertices = vtk.vtkCellArray()
vertices.InsertNextCell(3)
vertices.InsertCellPoint(0)
vertices.InsertCellPoint(1)
vertices.InsertCellPoint(2)

polydata = vtk.vtkPolyData()
polydata.SetPoints(points)
polydata.SetVerts(vertices)

# 将PolyData数据写入文件
vtk.vtkXMLPolyDataWriter.Write("output.vtp", polydata)

以上是使用vtkXMLPolyDataWriter的几种方法及示例代码。您可以根据自己的需求选择其中一种方法进行使用。