Example of JSON import into ngSkinTools by skipping UI settings screen.

ngSkinTools_import_without_ui.py

from ngSkinTools.importExport import JsonImporter
from ngSkinTools.influenceMapping import InfluenceMapping
from ngSkinTools.mllInterface import MllInterface
from ngSkinTools.ui.events import LayerEvents
from ngSkinTools.ui.layerDataModel import LayerDataModel


def ngSkinToolsImport(fileName, targetMesh):
    '''
    loads a JSON file (previously exported with ngSkinTools exporter) and loads data onto provided mesh.

    :param fileName: json file to load ngSkinTools data from
    :param targetMesh: skinned mesh (without ngSkinTools layers initialized yet)
    '''
    with open(fileName, 'r') as f:
        sourceModel = JsonImporter().process(f.read())

    # save loaded data to in-memory temporary mesh
    sourceModel.saveTo(MllInterface.TARGET_REFERENCE_MESH)

    sourceMll = MllInterface(mesh=MllInterface.TARGET_REFERENCE_MESH)

    # initialize ngSkinTools data to target mesh
    targetMll = MllInterface(mesh=targetMesh)
    targetMll.initLayers()

    # configure how source influences map to destination influences
    # in transfer function we need to supply a source:destination map, where
    # influences are represented by their index in source and destination skin cluster, e.g.
    # {0:1, 1:0, 2:2}  , etc.
    # ngSkinTools internally uses a mapper that tries it's best to find related influences
    # by their position in space and their names.
    mapper = InfluenceMapping()
    mapper.mirrorMode = False
    mapper.distanceMatchRule.maxThreshold = 0.1
    mapper.nameMatchRule.ignoreNamespaces = True
    mapper.sourceInfluences = sourceModel.influences
    mapper.destinationInfluences = targetMll.listInfluenceInfo()
    mapper.calculate()

    # other valid values: 'uvSpace', 'vertexId'
    vertexTransferMode = 'closestPoint'

    with targetMll.batchUpdateContext():
        sourceMll.transferWeights(targetMesh, influencesMapping=mapper.mapping,
                                  vertexTransferMode=vertexTransferMode)

    # optional section: signal UI about changes in data
    LayerDataModel.getInstance().updateLayerAvailability()
    LayerEvents.layerListModified.emit()