/// <summary>
/// Get for each vertex the weights for all influence objects, including zero weights.
/// </summary>
/// <param name="vertexWeights"></param>
/// <param name="influenceObjects"></param>
/// <param name="meshPath"></param>
private static void GetMeshWeightData(List <MDoubleArray> vertexWeights, MDagPathArray influenceObjects, MDagPath meshPath)
{
var fnMesh = new MFnMesh(meshPath);
// Get any attached skin cluster
var hasSkinCluster = false;
// Search the skin cluster affecting this geometry
var kDepNodeIt = new MItDependencyNodes(MFn.Type.kSkinClusterFilter);
// Go through each skin cluster in the scene until we find the one connected to this mesh
while (!kDepNodeIt.isDone && !hasSkinCluster)
{
MGlobal.displayInfo("Processing skin cluster...");
var kObject = kDepNodeIt.thisNode;
var kSkinClusterFn = new MFnSkinCluster(kObject);
var uiNumGeometries = kSkinClusterFn.numOutputConnections;
kSkinClusterFn.influenceObjects(influenceObjects);
MGlobal.displayInfo("\t uiNumGeometries : " + uiNumGeometries);
MGlobal.displayInfo("\t influenceOBjects number : " + influenceObjects.Count);
// Go through each connection on the skin cluster until we get the one connecting to this mesh
MGlobal.displayInfo("Mesh we are looking for : " + fnMesh.fullPathName);
for (uint uiGeometry = 0; uiGeometry < uiNumGeometries && !hasSkinCluster; uiGeometry++)
{
var uiIndex = kSkinClusterFn.indexForOutputConnection(uiGeometry);
var kInputObject = kSkinClusterFn.inputShapeAtIndex(uiIndex);
var kOutputObject = kSkinClusterFn.outputShapeAtIndex(uiIndex);
if (!kOutputObject.hasFn(MFn.Type.kMesh))
{
continue;
}
var fnOutput = new MFnMesh(MDagPath.getAPathTo(kOutputObject));
MGlobal.displayInfo("Output object : " + fnOutput.fullPathName);
if (fnOutput.fullPathName != fnMesh.fullPathName)
{
continue;
}
hasSkinCluster = true;
MGlobal.displayInfo("\t==> A connected skin cluster has been found.");
// Go through each vertex (== each component) and save the weights for each one
var kGeometryIt = new MItGeometry(kInputObject);
while (!kGeometryIt.isDone)
{
var kComponent = kGeometryIt.currentItem;
var kWeightArray = new MDoubleArray();
uint uiNumInfluences = 0;
kSkinClusterFn.getWeights(meshPath, kComponent, kWeightArray, ref uiNumInfluences);
vertexWeights.Add(kWeightArray);
kGeometryIt.next();
}
}
kDepNodeIt.next();
}
}
public override void doIt(MArgList args)
{
// parse args to get the file name from the command-line
//
parseArgs(args);
uint count = 0;
// Iterate through graph and search for skinCluster nodes
//
MItDependencyNodes iter = new MItDependencyNodes( MFn.Type.kInvalid);
for ( ; !iter.isDone; iter.next() )
{
MObject obj = iter.item;
if (obj.apiType == MFn.Type.kSkinClusterFilter)
{
count++;
// For each skinCluster node, get the list of influence objects
//
MFnSkinCluster skinCluster = new MFnSkinCluster(obj);
MDagPathArray infs = new MDagPathArray();
uint nInfs;
try
{
nInfs = skinCluster.influenceObjects(infs);
}
catch (Exception)
{
MGlobal.displayInfo("Error getting influence objects.");
continue;
}
if (0 == nInfs)
{
MGlobal.displayInfo("Error: No influence objects found.");
continue;
}
// loop through the geometries affected by this cluster
//
uint nGeoms = skinCluster.numOutputConnections;
for (uint ii = 0; ii < nGeoms; ++ii)
{
uint index;
try
{
index = skinCluster.indexForOutputConnection(ii);
}
catch (Exception)
{
MGlobal.displayInfo("Error getting geometry index.");
continue;
}
// get the dag path of the ii'th geometry
//
MDagPath skinPath = new MDagPath();
try{
skinCluster.getPathAtIndex(index,skinPath);
}
catch (Exception)
{
MGlobal.displayInfo("Error getting geometry path.");
continue;
}
// iterate through the components of this geometry
//
MItGeometry gIter = new MItGeometry(skinPath);
// print out the path name of the skin, vertexCount & influenceCount
//
UnicodeEncoding uniEncoding = new UnicodeEncoding();
string res = String.Format("{0} {1} {2}\n",skinPath.partialPathName,gIter.count,nInfs);
file.Write(uniEncoding.GetBytes(res),0,uniEncoding.GetByteCount(res));
// print out the influence objects
//
for (int kk = 0; kk < nInfs; ++kk)
{
res = String.Format("{0} ", infs[kk].partialPathName);
file.Write(uniEncoding.GetBytes(res),0,uniEncoding.GetByteCount(res));
}
res = "\n";
file.Write(uniEncoding.GetBytes(res), 0, uniEncoding.GetByteCount(res));
for ( /* nothing */ ; !gIter.isDone; gIter.next() ) {
MObject comp;
try
{
comp = gIter.component;
}
catch (Exception)
{
MGlobal.displayInfo("Error getting geometry path.");
continue;
}
// Get the weights for this vertex (one per influence object)
//
MDoubleArray wts = new MDoubleArray();
uint infCount = 0;
try
{
skinCluster.getWeights(skinPath, comp, wts, ref infCount);
}
catch (Exception)
{
displayError("Error getting weights.");
continue;
}
if (0 == infCount)
{
displayError("Error: 0 influence objects.");
}
// Output the weight data for this vertex
//
res = String.Format("{0} ",gIter.index);
file.Write(uniEncoding.GetBytes(res), 0, uniEncoding.GetByteCount(res));
for (int jj = 0; jj < infCount ; ++jj )
{
res = String.Format("{0} ", wts[jj]);
file.Write(uniEncoding.GetBytes(res), 0, uniEncoding.GetByteCount(res));
}
file.Write(uniEncoding.GetBytes("\n"), 0, uniEncoding.GetByteCount("\n"));
}
}
}
}
if (0 == count)
{
displayError("No skinClusters found in this scene.");
}
file.Close();
return;
}
public override void doIt(MArgList args)
{
// parse args to get the file name from the command-line
//
parseArgs(args);
uint count = 0;
// Iterate through graph and search for skinCluster nodes
//
MItDependencyNodes iter = new MItDependencyNodes(MFn.Type.kInvalid);
for ( ; !iter.isDone; iter.next())
{
MObject obj = iter.item;
if (obj.apiType == MFn.Type.kSkinClusterFilter)
{
count++;
// For each skinCluster node, get the list of influence objects
//
MFnSkinCluster skinCluster = new MFnSkinCluster(obj);
MDagPathArray infs = new MDagPathArray();
uint nInfs;
try
{
nInfs = skinCluster.influenceObjects(infs);
}
catch (Exception)
{
MGlobal.displayInfo("Error getting influence objects.");
continue;
}
if (0 == nInfs)
{
MGlobal.displayInfo("Error: No influence objects found.");
continue;
}
// loop through the geometries affected by this cluster
//
uint nGeoms = skinCluster.numOutputConnections;
for (uint ii = 0; ii < nGeoms; ++ii)
{
uint index;
try
{
index = skinCluster.indexForOutputConnection(ii);
}
catch (Exception)
{
MGlobal.displayInfo("Error getting geometry index.");
continue;
}
// get the dag path of the ii'th geometry
//
MDagPath skinPath = new MDagPath();
try{
skinCluster.getPathAtIndex(index, skinPath);
}
catch (Exception)
{
MGlobal.displayInfo("Error getting geometry path.");
continue;
}
// iterate through the components of this geometry
//
MItGeometry gIter = new MItGeometry(skinPath);
// print out the path name of the skin, vertexCount & influenceCount
//
UnicodeEncoding uniEncoding = new UnicodeEncoding();
string res = String.Format("{0} {1} {2}\n", skinPath.partialPathName, gIter.count, nInfs);
file.Write(uniEncoding.GetBytes(res), 0, uniEncoding.GetByteCount(res));
// print out the influence objects
//
for (int kk = 0; kk < nInfs; ++kk)
{
res = String.Format("{0} ", infs[kk].partialPathName);
file.Write(uniEncoding.GetBytes(res), 0, uniEncoding.GetByteCount(res));
}
res = "\n";
file.Write(uniEncoding.GetBytes(res), 0, uniEncoding.GetByteCount(res));
for (/* nothing */; !gIter.isDone; gIter.next())
{
MObject comp;
try
{
comp = gIter.component;
}
catch (Exception)
{
MGlobal.displayInfo("Error getting geometry path.");
continue;
}
// Get the weights for this vertex (one per influence object)
//
MDoubleArray wts = new MDoubleArray();
uint infCount = 0;
try
{
skinCluster.getWeights(skinPath, comp, wts, ref infCount);
}
catch (Exception)
{
displayError("Error getting weights.");
continue;
}
if (0 == infCount)
{
displayError("Error: 0 influence objects.");
}
// Output the weight data for this vertex
//
res = String.Format("{0} ", gIter.index);
file.Write(uniEncoding.GetBytes(res), 0, uniEncoding.GetByteCount(res));
for (int jj = 0; jj < infCount; ++jj)
{
res = String.Format("{0} ", wts[jj]);
file.Write(uniEncoding.GetBytes(res), 0, uniEncoding.GetByteCount(res));
}
file.Write(uniEncoding.GetBytes("\n"), 0, uniEncoding.GetByteCount("\n"));
}
}
}
}
if (0 == count)
{
displayError("No skinClusters found in this scene.");
}
file.Close();
return;
}