static MStatus twistNurbsSurface(MDagPath& objectPath, MObject& component)
{
MStatus status;
MPoint center;
MVector toCenter( -center.x, 0.0, -center.y );
double rotFactor = 0.5;
// We have a nurbs surface or component
//
MItSurfaceCV cvIter( objectPath, component, true, &status );
if ( status ) {
// We successfully created a nurbs surface iterator
//
for ( ; !cvIter.isDone(); cvIter.nextRow() ) {
for ( ; !cvIter.isRowDone(); cvIter.next() ) {
// Get the location of the CV
//
MPoint pnt = cvIter.position( MSpace::kWorld );
pnt = pnt + toCenter;
// Calculate rotation in radians about the y-axis
//
double rotation = pnt.y * rotFactor;
MMatrix rotMatrix;
// Set matrix to a rotation about the y axis
//
rotMatrix(0,0) = cos( rotation );
rotMatrix(0,2) = sin( rotation );
rotMatrix(2,0) = -sin( rotation );
rotMatrix(2,2) = cos( rotation );
pnt = ( pnt * rotMatrix ) - toCenter;
status = cvIter.setPosition( pnt, MSpace::kWorld );
if ( !status ) {
status.perror("MItSurfaceCV::setPosition");
break;
}
}
}
// Tell maya to redraw the surface with all of our changes
//
cvIter.updateSurface();
} else
status.perror("MItSurfaceCV::MItSurfaceCV");
return status;
}
MStatus cvExpand::doIt( const MArgList& args )
{
MSelectionList list;
MSelectionList newList;
// Get the geometry list from what is currently selected in the
// model
//
MGlobal::getActiveSelectionList( list );
MDagPath path;
MObject component;
// Make expanded Selection List
//
for ( MItSelectionList iter( list ); !iter.isDone(); iter.next() ) {
iter.getDagPath( path, component );
if ( path.hasFn( MFn::kNurbsSurfaceGeom ) &&
!component.isNull() ) {
for ( MItSurfaceCV cvIter( path, component );
!cvIter.isDone(); cvIter.next() ) {
newList.add( path, cvIter.cv() );
}
} else {
newList.add( path, component );
}
}
// Return expanded selection list as an array of strings
//
MStringArray returnArray;
newList.getSelectionStrings( returnArray );
MPxCommand::setResult( returnArray );
return MS::kSuccess;
}