weightValue always return 1

[imoh3n]

Hi.
I am new in maya api and i make decision to use it by python.
now i want to create a new deformer node.

but, i have a problem to query components weight values by weightValue function, this always return 1 for all iters.

can anybody help me.

this is deform definision in my code:

def deform(self, block, iter, mat, geomIndex):

        envelope = opx.cvar.MPxDeformerNode_envelope;
        envData = block.inputValue(envelope);
        env = envData.asFloat();

        if env == 0:
            return op.MStatus.kSuccess;

        startDistHnd = block.inputValue(self.startDist);
        startDist = startDistHnd.asFloat();
        endDistHnd = block.inputValue(self.endDist);
        endDist = endDistHnd.asFloat();

        while (iter.isDone() == 0):

            weight = self.weightValue(block, geomIndex, iter.index());

        ...
        ...
        ...
        ...