Question on using SlicerGT Texture mapping

Development
1

Hi Andras, maybe this is a simple question, but I really need your help. I have the requirement of using gradient color jpg file make a texture mapping on 3D surface, I have draft code with pure vtk, and it got the expected result:

import vtk

Create a render window

ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
renWin.SetSize(480,480)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)

Generate a sphere

sphere = vtk.vtkSphereSource()

Read the image data from a file

reader = vtk.vtkJPEGReader()
reader.SetFileName(“gradientColor.jpeg”)

Create texture object

texture = vtk.vtkTexture()
texture.SetInputConnection(reader.GetOutputPort())

#Map texture coordinates
map_to_plane = vtk.vtkTextureMapToPlane()
map_to_plane.SetInputConnection(sphere.GetOutputPort())

Create mapper and set the mapped texture as input

mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(map_to_plane.GetOutputPort())

Create actor and set the mapper and the texture

actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.SetTexture(texture)

ren.AddActor(actor)

iren.Initialize()
renWin.Render()
iren.Start()

The result as below picture:

图片
图片482×512 22.1 KB

I have two questions here:
The first one:
When I try to use SlicerIGT extension Texture Model, it has not got the expected result. The steps as below:

v = slicer.util.getNode(‘View1’)
v.SetBoxVisible(False)

Sphere

sphereSource = vtk.vtkSphereSource()
sphereSource.SetCenter(0,0,0)
sphereSource.SetRadius(60.0)
sphereSource.Update()
sphereSource = sphereSource.GetOutput() # vtkPolyData()

Create a model with the sphere and add it to scene

modelNode = slicer.mrmlScene.AddNewNodeByClass(‘vtkMRMLModelNode’)
modelNode.SetAndObservePolyData(sphereSource)
modelNode.CreateDefaultDisplayNodes()
modelNode.SetName(‘My sphere’)

and then I come back to main UI in 3D Slicer and use the Texture model as below:

图片
图片1867×683 125 KB

But as you see, the result is not expected. What am I wrong here?

The second one is: How can I use python script to generate the texture mapping model? Should I use below code:

def showTextureOnModel(self, modelNode, textureImageNode):
modelDisplayNode = modelNode.GetDisplayNode()
modelDisplayNode.SetBackfaceCulling(0)
textureImageFlipVert = vtk.vtkImageFlip()
textureImageFlipVert.SetFilteredAxis(1)
textureImageFlipVert.SetInputConnection(textureImageNode.GetImageDataConnection())
modelDisplayNode.SetTextureImageDataConnection(textureImageFlipVert.GetOutputPort())

maybe the question is simple and stupid, but I really need your help and suggestion. And I cannot access the website: onedrive.live.com, is there another website for the SlicerIGT tutorial?

Thanks in advance!

1 Like
2

Hi Buddies and experts in the community, anybody knows the solution? I don’t know how to convert the python script to 3D Slicer console(as the script in 1st section, it do the sphere texture mapping in pure vtk library very well, but I cannot convert the python script in 3D Slicer) . I refer to the link Documentation/Nightly/ScriptRepository - Slicer Wiki, but seems take no effect.

Your suggestions are appreciated
Thanks again!

3

Never mind, I have already solved the problem, refer to below link Documentation/Nightly/ScriptRepository - Slicer Wiki convert python script & run in 3D Slicer python console correctly.