error when loading surface.vtk generated in matlab isosurface

[Camille Lemen]

Hi,

I am trying to export a mesh generated in matlab with isosurface to scalismo. I noticed scalismo only reads vtk so I exported the 3D surface with https://www.mathworks.com/matlabcentral/fileexchange/31030-surface2vtk (I also tried with https://www.mathworks.com/matlabcentral/fileexchange/22602-export-triangulation-to-paraview and am getting the same error).

I scalismo, I ran:

val vol = MeshIO.readMesh(new File("/Path/to/AFLW_image00046.vtk")).get

But I am getting an NPE with this stacktrace:

java.lang.NullPointerException

  at scalismo.utils.MeshConversion$$anonfun$vtkPolyDataToTriangleMeshCommon$1.apply(Conversions.scala:169)

  at scalismo.utils.MeshConversion$$anonfun$vtkPolyDataToTriangleMeshCommon$1.apply(Conversions.scala:157)

  at scala.util.Try$.apply(Try.scala:192)

  at scalismo.utils.MeshConversion$.vtkPolyDataToTriangleMeshCommon(Conversions.scala:157)

  at scalismo.utils.MeshConversion$.vtkPolyDataToTriangleMesh(Conversions.scala:213)

  at scalismo.io.MeshIO$.readVTK(MeshIO.scala:167)

  at scalismo.io.MeshIO$.readMesh(MeshIO.scala:50)

  ... 30 elided

Any idea why that would be? Or an alternative to load this matlab isosurface to scalismo?

Thanks,

Cami.

[Camille Lemen]

I was actually able to load it by saving it in stl.

[Camille Lemen]

Actually, I found that the problem is not related to format but the texture. Whenever I add texture to the volume, I get this stacktrace in scalismo. Any idea?

Le jeudi 25 janvier 2018 11:10:10 UTC-8, Camille Lemen a écrit :

[Andreas Forster]

Dear Camille,

Scalismo does not yet support VTK stored meshes with color or texture. So you can not use scalismo.ui.MeshIO.readMesh to read a colored mesh. Scalismo-faces has some support for the *.ply format. So if you want to work with color then please try the ply format. Use

scalismo.faces.io.MeshIO.read(new File("your/mesh.ply"))

to read a mesh with texture or color. Please note also that the support in the ScalismoUI is yet missing to show colored meshes.

I hope my answer brings you further.

Best regards

Andreas

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