void ProcessPortLocationEvent(PortLocationEvent portEvent)
 {
     Z = GetZ(portEvent);
     GoOverConesSeeingVertexEvent(portEvent);
     CreateConeOnPortLocation(portEvent);
 }
 void ProcessPortLocationEvent(PortLocationEvent portEvent) {
     Z = GetZ(portEvent);
     GoOverConesSeeingVertexEvent(portEvent);
     CreateConeOnPortLocation(portEvent);
 }