// ===========================================================================
// Copyright 2018 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.
// ===========================================================================

//
//  Procedure Name:
//      defaultShaderName
//
//  Description:
//		Returns the name of the default shader, that is, the shader associated
//	with the "initialShadingGroup", if possible, otherwise the hard-coded name
//			lambert1
//
//  Input Arguments:
//      None.
//
//  Return Value:
//      None.
//
global proc string defaultShaderName()
{
	global string $gDefaultShaderName = "";
	if( $gDefaultShaderName == "" ){
		// Examine initialShadingGroup to get shader name.
		//
		if( `objExists "initialShadingGroup"` ){
			string $sources[] = ` listConnections -s 1 -type lambert "initialShadingGroup"`;
			if( size($sources) == 1 ){
				// Use the only shader
				//
				$gDefaultShaderName = $sources[0];
			}
		}
		if( $gDefaultShaderName == "" ){
			// Couldn't find it by examining initialShadingGroup; use
			// hard-coded name instead 
			//
			$gDefaultShaderName = "lambert1";
		}
	}
	return $gDefaultShaderName;
}