moveCurveCVsCmd/moveCurveCVsCmd.cpp

moveCurveCVsCmd/moveCurveCVsCmd.cpp
//-
// ==========================================================================
// Copyright 1995,2006,2008 Autodesk, Inc. All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk
// license agreement provided at the time of installation or download,
// or which otherwise accompanies this software in either electronic
// or hard copy form.
// ==========================================================================
//+
//
// DESCRIPTION:
//
// Produces the MEL command "moveCurveCVs".
//
// This is a simple little plug-in that takes the selected CVs of a NURBS curves
// and moves them to the origin. It is not a very practical plug-in, but
// it demonstrates retrieving CVs from a selection list and the use of the Curve CV iterator.
//
// To use the plug-in:
// (1) Draw a curve.
// (2) Switch Maya from Object selection mode to Component selection mode.
// (3) Pick some or all the CVs of the curve.
// (4) Type the command "moveCurveCVs" in the command window to move the CVs.
//
#include <maya/MIOStream.h>
#include <maya/MPxCommand.h>
#include <maya/MString.h>
#include <maya/MArgList.h>
#include <maya/MGlobal.h>
#include <maya/MSelectionList.h>
#include <maya/MItSelectionList.h>
#include <maya/MPoint.h>
#include <maya/MDagPath.h>
#include <maya/MFnPlugin.h>
#include <maya/MFnNurbsCurve.h>
#include <maya/MItCurveCV.h>
class moveCurveCVs : public MPxCommand
{
public:
moveCurveCVs() {};
virtual ~moveCurveCVs();
MStatus doIt( const MArgList& args );
static void* creator();
};
moveCurveCVs::~moveCurveCVs() {}
void* moveCurveCVs::creator()
{
return new moveCurveCVs();
}
MStatus moveCurveCVs::doIt( const MArgList& )
{
MStatus stat;
// Create a selection list iterator
// set the filter moveCurveCVsComponents
//
MItSelectionList * iter = new MItSelectionList( list,
&stat );
if ( MS::kSuccess == stat ) {
MDagPath mdagPath; // Item dag path
MObject mComponent; // Current component
double coord[4] = {0.0,0.0,0.0,0.0};
MPoint point( coord );
// Iterate over all selected curves
//
for ( ; !iter->isDone(); iter->next() )
{
// Create a function set to operate on selected curves
//
iter->getDagPath( mdagPath, mComponent );
MItCurveCV fnmoveCurveCVs( mdagPath, mComponent, &stat );
if ( MS::kSuccess == stat ) {
for ( ; !fnmoveCurveCVs.isDone(); fnmoveCurveCVs.next() )
{
fnmoveCurveCVs.setPosition( point, MSpace::kWorld );
}
fnmoveCurveCVs.updateCurve();
}
else {
cerr << "Function set error\n";
}
}
}
else {
cerr << "Error creating selection list iterator\n";
}
return stat;
}
MStatus initializePlugin( MObject obj )
{
MStatus status;
MFnPlugin plugin( obj, PLUGIN_COMPANY, "3.0", "Any");
status = plugin.registerCommand( "moveCurveCVs", moveCurveCVs::creator );
if (!status) {
status.perror("registerCommand");
return status;
}
return status;
}
MStatus uninitializePlugin( MObject obj)
{
MStatus status;
MFnPlugin plugin( obj );
status = plugin.deregisterCommand( "moveCurveCVs" );
if (!status) {
status.perror("deregisterCommand");
return status;
}
return status;
}