export discrete deformation field

[Chi Zhang]

Hi ,

In Tutorial 3,  how to export(write) the discrete deformation field (or EuclideanVector)  to the a txt file? Since I am trying to plot a heatmap on a human face mesh to illustrate the protrusion/retrusion of the mouth/lips. 

Cheers,

Chi

[Marcel Luethi]

Hi Chi

We do not currently have a dedicated method for writing out such fields. But you can just loop through the points, vectors as follows:

val faceWithVectors : DiscreteField[_3D, TriangleMesh, EuclideanVector[_3D]] = ???
for ((point, vec) <- faceWithVectors.pointsWithValues) {
  // write it here, e.g.
  print(point)
  print(vec)
}

Best regards,

Marcel

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[Chi Zhang]

Hi Marcel, 

Thanks a lot. I have successfully written it out using the code below. 

```scala

//export deformation filed

val deformationField: DiscreteField[_3D, TriangleMesh, EuclideanVector[_3D]] = DiscreteField3D(referenceMesh, deformations)

val vecpw = new PrintWriter(new File("vec.txt" ))
val pointpw = new PrintWriter(new File("point.txt" ))

for ((point, vec) <- deformationField.pointsWithValues) {
vecpw.write(vec.toString+System.getProperty("line.separator"))
pointpw.write(point.toString+System.getProperty("line.separator"))
}

vecpw.close
pointpw.close

```

Cheers,

Chi