// ===========================================================================
// 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.
// ===========================================================================
//
//
//  Creation Date:  17 Oct 1997
//
//  Procedure Name:
//      resetUnitsToDefault
//
//  Description:
//      Reset the units (angle, linear, and time) to those stored
//      in the preferences.
//
//  Return Value:
//      None.
//
global proc resetUnitsToDefault()
{
	string $unitL, $unitA, $unitT;
   
	if( `optionVar -exists workingUnitLinearDefault` ) {
		$unitL = `optionVar -q workingUnitLinearDefault`;
	} else {
		if( `optionVar -exists workingUnitLinear` ) {
			$unitL = `optionVar -q workingUnitLinear`;
		} else {
			$unitL = "cm";
		}
		optionVar -sv workingUnitLinearDefault $unitL;
	}
	if( `optionVar -exists workingUnitAngularDefault` ) {
		$unitA = `optionVar -q workingUnitAngularDefault`;
	} else {
		if( `optionVar -exists workingUnitAngular` ) {
			$unitA = `optionVar -q workingUnitAngular`;
		} else {
			$unitA = "deg";
		}
		optionVar -sv workingUnitAngularDefault $unitA;
	}
	if( `optionVar -exists workingUnitTimeDefault` ) {
		$unitT = `optionVar -q workingUnitTimeDefault`;
	} else {
		if( `optionVar -exists workingUnitTime` ) {
			$unitT = `optionVar -q workingUnitTime`;
		} else {
			$unitT = "film";
		}
		optionVar -sv workingUnitTimeDefault $unitT;
	}

	// set option vars for current scene
	optionVar -sv workingUnitLinear $unitL
			  -sv workingUnitAngular $unitA
			  -sv workingUnitTime $unitT;
			  
    catch( `currentUnit -linear $unitL` );
    catch( `currentUnit -angle $unitA` );
    catch( `currentUnit -time $unitT` );
}