How Do I Copy Weight Between Vertices

[molemansd7]

I'm looking for a way to copy the weighting of one vert to another. The verts are part of the same mesh. We have a character with a dress, and its a thick garment, two sided, so many verts are only a fraction of a unit away from each other from outside to inside. If I paint weights on the outer to make it look good, the inner verts still pass through horribly. I don't want to have to paint weights twice, or tweak them by hand. Any ideas on how to start?

[doug-hines]

CODE
/*
Written by Doug Hines on 10/15/2007
Tool used to move vertex weights of a skin cluster from one joint to another.
Joints must be in same skin cluster.
Script does not support multiple skinned objects.

Select one vertex at a time
*/

global proc string jointSelection_fromScrollList()
{
        // Get Selected Item (Joint Name) from textScrollList "jointLIST"
        string $listSelection[] = textScrollList -q -si jointLIST;
        print ($listSelection[0] + "\n");
        string $destinedJoint = $listSelection[0];
        return $destinedJoint;
}

global proc transferWeights(string $weightDestination)
{
    string $selectedVertices[] = ls -sl -fl;
    if(size($selectedVertices) == 0)
    {
        error ("Found 0 vertices selected.  Expected minimum size: 1 \n");
    }
            int $index = 0;
            string $componentParentList[0];
            for($vert in $selectedVertices)
            {
                string $componentParent = match "^[^\.]*" $vert;
                $componentParentList[$index] = $componentParent;
    //    print ($componentParentList[$index] + "\n");
                if($index > 0)
                {
                    if(gmatch $componentParentList[$index] $componentParentList[$index - 1] == 0)
                    {
                        error("Component parent objects do not match.");
                    }
                }
                $index++;
            }
    print ("Selected Vertex Count: "+ size($componentParentList) + "\n");

    string $vertParentskinCluster = findRelatedSkinCluster $componentParentList[0];
    print ("Selected Vertices belong to Skin Cluster : " + $vertParentskinCluster + "\n");

    // Get the skin weight and copy it to the new joint influence.  Set old influence to 0;
    for($vert in $selectedVertices)
    {
        string $oldVertInfluence[] = skinPercent -ib .001 -q -t $vertParentskinCluster;
        float $skinWeight[] = skinPercent -ib .001 -q -v $vertParentskinCluster;
        print $skinWeight;
        print $weightDestination;
        skinPercent -tv $weightDestination $skinWeight[0] $vertParentskinCluster $vert;
        skinPercent -tv $oldVertInfluence[0] 0.0 $vertParentskinCluster $vert;
    }
}

global proc dhU_transferVertexWeightsWindow()
{
    if(window -exists jointWinGUI)
    {
        deleteUI jointWinGUI;
    }
    string $jointDestination;
    string $jointListWin = window -mxb 0 -mnb 0 -t "Joints" jointWinGUI;
        columnLayout;
        textScrollList -ams 0 -sc "$jointDestination = jointSelection\_fromScrollList" jointLIST;
            string $sceneJoints[] = ls -type joint;
            for($joint in $sceneJoints)
            {
                textScrollList -e -append $joint jointLIST;
            }
        button -w 250 -h 25 -l "Move Vertex Weights" -c ("transferWeights($jointDestination)");
        textScrollList -e -h 500 jointLIST;
        window -e -wh 300 600 jointWinGUI;
    showWindow $jointListWin;
}

dhU_transferVertexWeightsWindow

I wrote this for similiar purposes on one of my characters. It only works for 1 vert at a time, but can be easily modified to do sets of verts.

[molemansd7]

Thanks Kuro...I'm gonna look into how it runs. What's the general process for making this work? just select a joint and click the button? I'm trying to take, say vtx[500]'s weight and copy it to vtx[501]. This will do that?

[doug-hines]

its based off of a selected vertex in the maya viewport. Then select the joint from the list. Transfer weights.