Custom geometry shape and command

[user_deleted]

Hi
I created custom geometry shape, that is almost exact copy of "apiMesh" example from maya devkit.
I also need to create a command that gets to the geometryData guts. The command will export vertices to renderman.
So, here are a few facts:
- my shape has outputSurface attribute
- outputSurface is of type MultiCurvesData derived from MPxGeometryData
- MPxGeometryData has a pointer to my own class (exactly as in devkit example)
- my command gets fed with MDagPath pointing to shapeNode and needs to access MultiCurvesData members.

Question: how do I go from MDagPath of shape to MultiCurvesData object ?

thanks for any tips

[user_deleted]

got it...

snippet of code :

void MultiCurvesRI::DL_Add(double sampleTime, MDagPath shapeDag)
{
    MFnDependencyNode dgCurvesNode(shapeDag.node());
    MPlug curvesDataPlug = dgCurvesNode.findPlug(MultiCurves::outputSurface, &stat);
    MObject oCurvesData;
    curvesDataPlug.getValue(oCurvesData);
    MFnPluginData fnpdCurvesData(oCurvesData, &stat);
    MPxData* pBaseData = fnpdCurvesData.data(&stat);
    MultiCurvesData* pCurvesData = reinterpret_cast ( pBaseData );
    MultiCurvesGeom* pCurves = pCurvesData->fGeometry; //this is my custom class
}