// ===========================================================================
// 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.
// ===========================================================================
//  Description:
//      Cycles the background color of viewports, and then to gradient display
//
//  Return Value:
//      None.
//
global proc cycleBackgroundColor(){

	// query bg color
	float $rgb[3] = `displayRGBColor -query background`;

	int $gradOn = `displayPref -q -displayGradient`;
	if ($gradOn)
	{
		displayRGBColor background 0 0 0;
		displayPref -displayGradient 0;
	}
	else
	{
		if ($rgb[0] == 0)
		{	
			displayRGBColor background 0.36 0.36 0.36;//default color
		}
		else if ($rgb[0] < 0.5)
		{
			displayRGBColor background 0.631 0.631 0.631;
		}
		else
		{
			displayPref -displayGradient 1;
		}
	}

	optionVar -intValue "displayViewportGradient" `displayPref -query -displayGradient`;
}