// Define an anonymous function;
// serves as our main loop,
// limits the scope of variables
(function(){
 
	/*********************************************************************/
	// String : A function for retrieving a translation if one exists
	function text( sText )
	{
		// If the version of the application supports qsTr()
		if( typeof( qsTr ) != "undefined" ){
			// Return the translated (if any) text
			return qsTr( sText );
		}
 
		// Return the original text
		return sText;
	};
 
	/*********************************************************************/
	// Define common message variables
	var sTitle = text( "Selection Error" );
	var sMessage = text( "You must select one or more nodes to perform this action." );
	var sButton = text( "&OK" );
 
	// Get the selected nodes
	var aNodes = Scene.getSelectedNodeList();
	// Get the number of nodes
	var nNodes = aNodes.length;
	// If we do not have nodes
	if( nNodes < 1 ){		
		// Alert the user
		MessageBox.warning( sMessage, sTitle, sButton, "" );
 
		// We are done...
		return;
	}
 
	// Declare working variables
	var oNode;
	var boxBounding;
	var nMidY;
	var vecCenter;
 
	// Start collecting events for the undo stack
	beginUndo();
 
	// Iterate over the nodes
	for( var i = 0; i < nNodes; i += 1 ){
		// Get the 'current' node
		oNode = aNodes[ i ];
 
		// Get the local bounding box for the node
		boxBounding = oNode.getLocalBoundingBox();
		// Calculate the center of the bounding box
		nMidY = (boxBounding.maxY - boxBounding.minY) * 0.5;
		// Create a translation vector
		vecCenter = new DzVec3( 0, nMidY, 0 );
		// Set the origin for the node; as default
		oNode.setOrigin( vecCenter, true );
		// Adjust to account for controllers
		oNode.adjustOrigin( vecCenter );
	}
 
	// Push the events to the undo stack; as a single event
	acceptUndo( text( "Center Origin(s)" ) );
 
// Finalize the function and invoke
})();