def ply2gii(in_file, metadata, out_file=None):
    """Convert from ply to GIfTI"""
    from pathlib import Path
    from numpy import eye
    from nibabel.gifti import (
        GiftiMetaData, GiftiCoordSystem, GiftiImage, GiftiDataArray,
    )
    from pyntcloud import PyntCloud

    in_file = Path(in_file)
    surf = PyntCloud.from_file(str(in_file))

    # Update centroid metadata
    metadata.update(
        zip(('SurfaceCenterX', 'SurfaceCenterY', 'SurfaceCenterZ'),
            ['%.4f' % c for c in surf.centroid])
    )

    # Prepare data arrays
    da = (
        GiftiDataArray(
            data=surf.xyz.astype('float32'),
            datatype='NIFTI_TYPE_FLOAT32',
            intent='NIFTI_INTENT_POINTSET',
            meta=GiftiMetaData.from_dict(metadata),
            coordsys=GiftiCoordSystem(xform=eye(4), xformspace=3)),
        GiftiDataArray(
            data=surf.mesh.values,
            datatype='NIFTI_TYPE_INT32',
            intent='NIFTI_INTENT_TRIANGLE',
            coordsys=None))
    surfgii = GiftiImage(darrays=da)

    if out_file is None:
        out_file = fname_presuffix(
            in_file.name, suffix='.gii', use_ext=False, newpath=str(Path.cwd()))

    surfgii.to_filename(str(out_file))
    return out_file
Convert from ply to GIfTI