Python VTK Read Write 常用读写以及 渲染 显示

 Python VTK 常用读写以及 渲染 显示

Part1 Common Reader

    Reader = vtk.vtkNIFTIImageReader()
    Reader.SetFileName('./data/seg.nii')
    Reader.Update()
 
    reader = vtk.vtkSTLReader()
    reader.SetFileName("D:/stress.stl")
 
    reader.Update()

	reader = vtk.vtkPolyDataReader()
        reader.SetFileName('E:/AF_right.vtk')  # SetFileName设置要读取的vtk文件
	reader.ReadAllScalarsOn()
	reader.ReadAllVectorsOn()
	reader.ReadAllTensorsOn()
	reader.Update()

# ReadImageData
#!/usr/bin/env python
# -*- coding: utf-8 -*-

# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkIOXML import vtkXMLImageDataReader
from vtkmodules.vtkRenderingCore import (
    vtkActor,
    vtkDataSetMapper,
    vtkRenderWindow,
    vtkRenderWindowInteractor,
    vtkRenderer
)

    # Read the source file.
    reader = vtkXMLImageDataReader()
    reader.SetFileName(file_name)

Part2 other

    # Read the source file.
    reader = vtk.vtkXMLUnstructuredGridReader()
    reader.SetFileName("tetra.vtu")
    reader.Update()  # Needed because of GetScalarRange


    reader = vtkXMLPolyDataReader()
    reader.SetFileName("tetra.vtp")
    reader.Update()

    # vtkSLCReader to read.
    reader = vtkSLCReader()
    reader.SetFileName(InputFilename)
    reader.Update()

    # Read Exodus Data
    reader = vtkExodusIIReader()
    reader.SetFileName(filename)
    reader.UpdateInformation()
    reader.SetTimeStep(10)
    reader.SetAllArrayStatus(vtkExodusIIReader.NODAL, 1)  # enables all NODAL variables
    reader.Update()


    # Read and display for verification
    reader = vtkPLYReader()
    reader.SetFileName(filename)
    reader.Update()

# HDRReader

# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkIOImage import vtkHDRReader
from vtkmodules.vtkInteractionImage import vtkImageViewer
from vtkmodules.vtkRenderingCore import vtkRenderWindowInteractor


    reader = vtkHDRReader()

    # Check the image can be read
    if not reader.CanReadFile(file_name):
        print('CanReadFile failed for ', file_name)
        return

    reader.SetFileName(file_name)
    reader.UpdateInformation()

Part3 3DSImporter

#!/usr/bin/env python

# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkIOImport import vtk3DSImporter
from vtkmodules.vtkRenderingCore import (
    vtkCamera,
    vtkRenderWindow,
    vtkRenderWindowInteractor,
    vtkRenderer
)

#E:/space-ship.3DS
def main():
    fileName = "E:/space-ship.3DS" #get_program_parameters()

    importer = vtk3DSImporter()
    importer.SetFileName(fileName)
    importer.ComputeNormalsOn()

    colors = vtkNamedColors()

    renderer = vtkRenderer()
    renWin = vtkRenderWindow()
    iren = vtkRenderWindowInteractor()

    renWin.AddRenderer(renderer)
    renderer.SetBackground2(colors.GetColor3d('Gold'))
    renderer.SetBackground(colors.GetColor3d('Wheat'))
    renderer.GradientBackgroundOn()

    iren.SetRenderWindow(renWin)
    importer.SetRenderWindow(renWin)
    importer.Update()

    # actors = vtkActorCollection()
    actors = renderer.GetActors()
    print('There are', actors.GetNumberOfItems(), 'actors.')

    renWin.SetWindowName('3DSImporter')
    renWin.Render()
    camera = vtkCamera()
    camera.SetPosition(0, -1, 0)
    camera.SetFocalPoint(0, 0, 0)
    camera.SetViewUp(0, 0, 1)
    camera.Azimuth(150)
    camera.Elevation(30)

    renderer.SetActiveCamera(camera)
    renderer.ResetCamera()
    renderer.ResetCameraClippingRange()

    renWin.Render()
    iren.Start()


def get_program_parameters():
    import argparse
    description = 'Importing a 3ds file.'
    epilogue = '''
   '''
    parser = argparse.ArgumentParser(description=description, epilog=epilogue,
                                     formatter_class=argparse.RawDescriptionHelpFormatter)
    parser.add_argument('filename', help='iflamingo.3ds.')
    args = parser.parse_args()
    return args.filename


if __name__ == '__main__':
    main()

 

Part4 Writer

WriteSTL

#!/usr/bin/env python

# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkFiltersSources import vtkSphereSource
from vtkmodules.vtkIOGeometry import (
    vtkSTLReader,
    vtkSTLWriter
)

    sphereSource = vtkSphereSource()
    sphereSource.Update()

    # Write the stl file to disk
    stlWriter = vtkSTLWriter()
    stlWriter.SetFileName(filename)
    stlWriter.SetInputConnection(sphereSource.GetOutputPort())
    stlWriter.Write()

#   WritePLY

# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkFiltersSources import vtkSphereSource
from vtkmodules.vtkIOPLY import (
    vtkPLYReader,
    vtkPLYWriter
)

    sphereSource = vtkSphereSource()
    sphereSource.Update()

    plyWriter = vtkPLYWriter()
    plyWriter.SetFileName(filename)
    plyWriter.SetInputConnection(sphereSource.GetOutputPort())
    plyWriter.Write()

# ImageWriter

#!/usr/bin/env python

# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkFiltersSources import vtkSphereSource
from vtkmodules.vtkIOImage import (
    vtkBMPWriter,
    vtkJPEGWriter,
    vtkPNGWriter,
    vtkPNMWriter,
    vtkPostScriptWriter,
    vtkTIFFWriter
)
from vtkmodules.vtkRenderingCore import (
    vtkActor,
    vtkPolyDataMapper,
    vtkRenderWindow,
    vtkRenderWindowInteractor,
    vtkRenderer,
    vtkWindowToImageFilter
)


def main():
    colors = vtkNamedColors()

    # Set the background color.
    colors.SetColor('BkgColor', [26, 51, 102, 255])

    # create a rendering window and renderer
    ren = vtkRenderer()
    renWin = vtkRenderWindow()
    renWin.AddRenderer(ren)

    # create a renderwindowinteractor
    iren = vtkRenderWindowInteractor()
    iren.SetRenderWindow(renWin)

    # create source
    source = vtkSphereSource()
    source.SetCenter(0, 0, 0)
    source.SetRadius(5.0)

    # mapper
    mapper = vtkPolyDataMapper()
    mapper.SetInputConnection(source.GetOutputPort())

    # actor
    actor = vtkActor()
    actor.SetMapper(mapper)

    # color the actor
    actor.GetProperty().SetColor(colors.GetColor3d('Yellow'))

    # assign actor to the renderer
    ren.AddActor(actor)
    ren.SetBackground(colors.GetColor3d('BkgColor'))

    renWin.SetWindowName('ImageWriter')
    renWin.Render()

    ext = ['', '.png', '.jpg', '.ps', '.tiff', '.bmp', '.pnm']
    filenames = list(map(lambda x: 'ImageWriter' + x, ext))
    filenames[0] = filenames[0] + '1'
    for f in filenames:
        WriteImage(f, renWin, rgba=False)

    iren.Initialize()
    iren.Start()


def WriteImage(fileName, renWin, rgba=True):
    '''
    Write the render window view to an image file.

    Image types supported are:
     BMP, JPEG, PNM, PNG, PostScript, TIFF.
    The default parameters are used for all writers, change as needed.

    :param fileName: The file name, if no extension then PNG is assumed.
    :param renWin: The render window.
    :param rgba: Used to set the buffer type.
    :return:
    '''

    import os

    if fileName:
        # Select the writer to use.
        path, ext = os.path.splitext(fileName)
        ext = ext.lower()
        if not ext:
            ext = '.png'
            fileName = fileName + ext
        if ext == '.bmp':
            writer = vtkBMPWriter()
        elif ext == '.jpg':
            writer = vtkJPEGWriter()
        elif ext == '.pnm':
            writer = vtkPNMWriter()
        elif ext == '.ps':
            if rgba:
                rgba = False
            writer = vtkPostScriptWriter()
        elif ext == '.tiff':
            writer = vtkTIFFWriter()
        else:
            writer = vtkPNGWriter()

        windowto_image_filter = vtkWindowToImageFilter()
        windowto_image_filter.SetInput(renWin)
        windowto_image_filter.SetScale(1)  # image quality
        if rgba:
            windowto_image_filter.SetInputBufferTypeToRGBA()
        else:
            windowto_image_filter.SetInputBufferTypeToRGB()
            # Read from the front buffer.
            windowto_image_filter.ReadFrontBufferOff()
            windowto_image_filter.Update()

        writer.SetFileName(fileName)
        writer.SetInputConnection(windowto_image_filter.GetOutputPort())
        writer.Write()
    else:
        raise RuntimeError('Need a filename.')


if __name__ == '__main__':
    main()

 Part 5 show vtk

#!/usr/bin/env python

# noinspection PyUnresolvedReferences
import vtkmodules.vtkInteractionStyle
# noinspection PyUnresolvedReferences
import vtkmodules.vtkRenderingOpenGL2
from vtkmodules.vtkCommonColor import vtkNamedColors
from vtkmodules.vtkFiltersSources import vtkSphereSource
from vtkmodules.vtkIOGeometry import (
    vtkSTLReader,
    vtkSTLWriter
)
from vtkmodules.vtkRenderingCore import (
    vtkActor,
    vtkPolyDataMapper,
    vtkRenderWindow,
    vtkRenderWindowInteractor,
    vtkRenderer
)


def get_program_parameters():
    import argparse
    description = 'Generate image data, then write a .stl file.'
    epilogue = '''
   '''
    parser = argparse.ArgumentParser(description=description, epilog=epilogue)
    parser.add_argument('filename', help='A required stl filename.', nargs='?',
                        const='TestWriteSTL.ply',
                        type=str, default='TestWriteSTL.ply')
    args = parser.parse_args()
    return args.filename


def main():
    colors = vtkNamedColors()

    filename = get_program_parameters()

    sphereSource = vtkSphereSource()
    sphereSource.Update()

    # Write the stl file to disk
    stlWriter = vtkSTLWriter()
    stlWriter.SetFileName(filename)
    stlWriter.SetInputConnection(sphereSource.GetOutputPort())
    stlWriter.Write()

    # Read and display for verification
    reader = vtkSTLReader()
    reader.SetFileName(filename)

    mapper = vtkPolyDataMapper()
    mapper.SetInputConnection(reader.GetOutputPort())

    actor = vtkActor()
    actor.SetMapper(mapper)
    actor.GetProperty().SetColor(colors.GetColor3d('MistyRose'))

    # Create a rendering window and renderer
    ren = vtkRenderer()
    renWin = vtkRenderWindow()
    renWin.AddRenderer(ren)
    renWin.SetWindowName('WriteSTL')

    # Create a renderwindowinteractor
    iren = vtkRenderWindowInteractor()
    iren.SetRenderWindow(renWin)

    # Assign actor to the renderer
    ren.AddActor(actor)
    ren.SetBackground(colors.GetColor3d('cobalt_green'))

    # Enable user interface interactor
    iren.Initialize()
    renWin.Render()
    iren.Start()


if __name__ == '__main__':
    main()

效果：