How get the Polylines which creat by the same contour plane in MakeRhinoContours() ? (c++)

@pythonuser wrote:

Hi:
In the this sample, if I set input.m_bAddOutputToDocument = false, all the Polylines out will add in ON_SimpleArray<ON_Polyline*> pline_array (target object is mesh), how can I get the Polylines which creat by the same contour plane ?

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