ml_utilities.py 文件源码

def getChannelFromAnimCurve(curve, plugs=True):
    '''
    Finding the channel associated with a curve has gotten really complicated since animation layers.
    This is a recursive function which walks connections from a curve until an animated channel is found.
    '''


    #we need to save the attribute for later.
    attr = ''
    if '.' in curve:
        curve, attr = curve.split('.')

    nodeType = mc.nodeType(curve)
    if nodeType.startswith('animCurveT') or nodeType.startswith('animBlendNode'):
        source = mc.listConnections(curve+'.output', source=False, plugs=plugs)
        if not source and nodeType=='animBlendNodeAdditiveRotation':
            #if we haven't found a connection from .output, then it may be a node that uses outputX, outputY, etc.
            #get the proper attribute by using the last letter of the input attribute, which should be X, Y, etc.
            #if we're not returning plugs, then we wont have an attr suffix to use, so just use X.
            attrSuffix = 'X'
            if plugs:
                attrSuffix = attr[-1]

            source = mc.listConnections(curve+'.output'+attrSuffix, source=False, plugs=plugs)
        if source:
            nodeType = mc.nodeType(source[0])
            if nodeType.startswith('animCurveT') or nodeType.startswith('animBlendNode'):
                return getChannelFromAnimCurve(source[0], plugs=plugs)
            return source[0]