python("import sys");
string $selected[] = `ls -selection`;
global proc performExtractDeltas()
{
	string $sel[] = `ls -sl -tr`;
	string $shapes[];
	for ($s in $sel)
	{
		$shapes = `listRelatives -s $s`;
		for ($sh in $shapes)
		{
			if (`nodeType $sh` != "mesh")
			{
				error "The selected geometry is no polygon object!";
			}
		}
	}
	if (size($sel) == 2)
	{
		$shapes = `listRelatives -s $sel[0]`;
		string $skin[] = `listConnections -type "skinCluster" $shapes[0]`;
		if (!`size($skin)`)
		{
			error "The first selected object is not bound to a skin cluster!";
		}
	}
	else
	{
		error "Please select two polygonal objects!";
	}
	extractDeltas -s $sel[0] -c $sel[1];
}

performExtractDeltas();
select -r $selected[1];
python("import importlib");
python("sys.path.append('c:/Arts and Spells/Scripts')");
python("import bsIndex");
python("importlib.reload(bsIndex)");
python("bsIndex.calc()");
//delete;