//******************************************************************************
// 
// 版权所有: 玉溪时光科技有限公司
// 联系邮箱: q.100@qq.com
// 开发日期: 2024/09/16
// 
//******************************************************************************

global proc SGDelBlendShape (int $meshIndex, int $inTgtGrp){
	
	string $bsn = `SGGetMeshes -i $meshIndex` + "_blendShapes";
	
	if(!`objExists $bsn`){
		return;
	}
	
	string $attr;
	
	// Skip if the target group to be deleted are locked
	$attr = $bsn + ".weight[" + $inTgtGrp + "]";
	if(`getAttr -l $attr`)
	{
		warning ("There is no such attribute:" + $attr) ;
		return ;
	}
    
	//Remove combination shape if there is any
	$source = eval("connectionInfo -sourceFromDestination \""+$bsn+".w["+$inTgtGrp+"]\"");
	$sourceStrings = stringToStringArray($source, ".");
	if(size($sourceStrings) == 2)
	{
		if(nodeType($sourceStrings[0]) == "combinationShape")
			delete $sourceStrings[0];
	}

 	// Remember the next target of this target.
	// This must be done before removing the weight, since it will cause 
	// itself removed from the midLayer.
	$attr = $bsn + ".parentDirectory[" + $inTgtGrp + "]";
	int $parentDirectory = `getAttr $attr`;
	if ($parentDirectory > 0)
	{
		$attr = $bsn + ".targetDirectory[" + $parentDirectory + "].childIndices";
		int $childIndices[] = `getAttr $attr`;
		int $location = intArrayFind($inTgtGrp, 0, $childIndices);
		if ( $location != -1 && $location + 1 < size($childIndices) )
		{
			$attr = $bsn + ".nextTarget[" + $inTgtGrp + "]";
			setAttr $attr $childIndices[$location + 1];
		}
	}

    // Remove the element in the weight array. This has to happen first.
    $attr = $bsn + ".weight[" + $inTgtGrp + "]";
    removeMultiInstance -b true $attr;
    $attr = $bsn + ".parentDirectory[" + $inTgtGrp + "]";
    removeMultiInstance -b true $attr;
    $attr = $bsn + ".nextTarget[" + $inTgtGrp + "]";
    removeMultiInstance -b true $attr;
    $attr = $bsn + ".targetVisibility[" + $inTgtGrp + "]";
    removeMultiInstance -b true $attr;
    $attr = $bsn + ".targetParentVisibility[" + $inTgtGrp + "]";
    removeMultiInstance -b true $attr;
	
    $attr = $bsn + ".inputTarget";
    int $nbInTgt = `getAttr -size $attr`;
    int $inTgtIndices[] = `getAttr -multiIndices $attr`;

    int $needsReset = 0;
    for( $i = 0; $i < $nbInTgt; $i++ )
    {
		int $index = $inTgtIndices[$i];

		string $targetIndex = $bsn + ".inputTarget[" + $index + "].sculptTargetIndex";
		if( `getAttr $targetIndex` == $inTgtGrp )
			$needsReset = 1; 
    }
    // we will deleted the target group that is being sculpted on
    if( $needsReset == 1 )
    {
		sculptTarget -e -target -1 $bsn;
    }

    for( $i = 0; $i < $nbInTgt; $i++ )
    {
		int $index = $inTgtIndices[$i];

		// remove each input target item within the group
		// we have to do this first before deleting the inputTargetGroup
		// otherwise on undo, the inputTargetItems aren't restored for some reason.
		$attr = $bsn + ".inputTarget[" + $index + "].inputTargetGroup[" + $inTgtGrp + "].inputTargetItem";

		int $nbInItems = `getAttr -size $attr`;
		int $inItemIndices[] = `getAttr -multiIndices $attr`;
		for( $j = 0; $j < $nbInItems; $j++ )
		{
			blendShapeDeleteInBetweenTarget($bsn, $inTgtGrp, $inItemIndices[$j]);
		}

		// remove each target weights within the group
		// we have to do this first before deleting the inputTargetGroup
		// otherwise on undo, the targetWeights aren't restored for some reason.
		$attr = $bsn + ".inputTarget[" + $index + "].inputTargetGroup[" + $inTgtGrp + "].targetWeights";

		removeMultiInstance -b true -all true $attr;

		// remove the entire target group
		$attr = $bsn + ".inputTarget[" + $index + "].inputTargetGroup[" + $inTgtGrp + "]";
		removeMultiInstance -b true $attr;
    }
	
	//Remove alias if there is one

	$attr = $bsn + ".weight[" + $inTgtGrp + "]";
	string $alias = `aliasAttr -q $attr`;
	if($alias != "")
	{
		$attr = $bsn + "." + $alias;
		aliasAttr -rm $attr;
	}
}