Brain segmentation on .VTK head surface

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13

I wouldn’t browse cells but only points. I also wouldn’t create an RGB scalar array, but a simple scalar array:

const points = polyData.getPoints();
const scalars = vtkDataArray.newInstance({dataType: image.getPointData().getDataType(), size:  points.getNumberOfPoints(), numberOfComponents:1});

const xyz = [];
for (let i = 0; i <  points.getNumberOfPoints(); ++i) {
  points.getPoint(i, xyz);
  const currentVxValue = image.getScalarValueFromWorld(xyz,0);
  scalars.setTuple(i, [currentVxValue]);
}
polydata.getPointData().setScalars(scalars);
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