MEL Command for selecting hard edges,

selectHardEdges.cpp

//
// Copyright (C) Andreas Rånman
// 
// File: selectHardEdgesCmd.cpp
//
// MEL Command: selectHardEdges
//
// Author: Maya Plug-in Wizard 2.0
//

#include "selectHardEdgesCmd.h"

#include <maya/MArgList.h>
#include <maya/MObject.h>
#include <maya/MGlobal.h>
#include <maya/MItMeshEdge.h>
#include <maya/MString.h>
#include <maya/MDagPath.h>
#include <maya/MSelectionList.h>

MStatus selectHardEdges::doIt(const MArgList& args)
//
//	Description:
//		Select all hard edges for specified object,
//
//	Return Value:
//		MStatus success/failed,
//
{
	MStatus status = MStatus::kSuccess;

	// Check that we gotten one argument,
	if (args.length() != 1)
	{
		MGlobal::displayError("Need 1 item!");
		return MStatus::kFailure;
	}

	// Add the specified object to a selection list, if it can be found.
	MSelectionList list;
	MString strCurrSelection;
	status = args.get(0, strCurrSelection);
	if (MStatus::kSuccess == status) list.add(strCurrSelection);

	// Get the DAG Path to object, and iterate through all it's edges, appending each hard edge to selection
	MDagPath dagPath;
	MObject edge;
	list.getDagPath(0, dagPath);

	for (MItMeshEdge edges(dagPath); !edges.isDone(); edges.next()) {
		if (!edges.isSmooth()) {
			edge = edges.currentItem();
			MGlobal::select(dagPath, edge, MGlobal::kAddToList);
		}
	}

	return MS::kSuccess;
}

void* selectHardEdges::creator()
//
//	Description:
//		this method exists to give Maya a way to create new objects
//      of this type. 
//
//	Return Value:
//		a new object of this type
//
{
	return new selectHardEdges();
}

selectHardEdges::selectHardEdges()
//
//	Description:
//		selectHardEdges constructor
//
{}

selectHardEdges::~selectHardEdges()
//
//	Description:
//		selectHardEdges destructor
//
{}

selectHardEdges.h

#ifndef _selectHardEdgesCmd
#define _selectHardEdgesCmd
//
// Copyright (C) Andreas Rånman
// 
// File: selectHardEdgesCmd.h
//
// MEL Command: selectHardEdges
//
// Author: Maya Plug-in Wizard 2.0
//

#include <maya/MPxCommand.h>

class MArgList;

class selectHardEdges : public MPxCommand
{

public:
				selectHardEdges();
	virtual		~selectHardEdges();

	MStatus		doIt( const MArgList& args);
	static		void* creator();
};

#endif