MPxSurfaceShape objects can have an associated marking menu. A MEL function that defines the marking menu for the node must be created with the following name: $nodeName + "DagMenuProc". An example is as follows:
global proc apiMeshDagMenuProc( string $parent, string $child ) { setParent -m $parent; // Simple marking menu with 3 items at // N north, W west and E east. string $cmd = "hide " + $child; menuItem -l "Hide" -rp "N" -c $cmd; $cmd = "boundingBoxDisplayCtrl(1,\"\");"; menuItem -l "Show bounding box" -rp "W" -c $cmd; $cmd = "boundingBoxDisplayCtrl(0,\"\");"; menuItem -l "Hide bounding box" -rp "E" -c $cmd; }
Executing the MEL script above and then right-clicking on the custom surface shape node will invoke the marking menu.