private void setMeshData(MObject transform, MObject dataWrapper)
{
// Get the mesh node.
MFnDagNode dagFn = new MFnDagNode(transform);
MObject mesh = dagFn.child(0);
// The mesh node has two geometry inputs: 'inMesh' and 'cachedInMesh'.
// 'inMesh' is only used when it has an incoming connection, otherwise
// 'cachedInMesh' is used. Unfortunately, the docs say that 'cachedInMesh'
// is for internal use only and that changing it may render Maya
// unstable.
//
// To get around that, we do the little dance below...
// Use a temporary MDagModifier to create a temporary mesh attribute on
// the node.
MFnTypedAttribute tAttr = new MFnTypedAttribute();
MObject tempAttr = tAttr.create("tempMesh", "tmpm", MFnData.Type.kMesh);
MDagModifier tempMod = new MDagModifier();
tempMod.addAttribute(mesh, tempAttr);
tempMod.doIt();
// Set the geometry data onto the temp attribute.
dagFn.setObject(mesh);
MPlug tempPlug = dagFn.findPlug(tempAttr);
tempPlug.setValue(dataWrapper);
// Use the temporary MDagModifier to connect the temp attribute to the
// node's 'inMesh'.
MPlug inMeshPlug = dagFn.findPlug("inMesh");
tempMod.connect(tempPlug, inMeshPlug);
tempMod.doIt();
// Force the mesh to update by grabbing its output geometry.
dagFn.findPlug("outMesh").asMObject();
// Undo the temporary modifier.
tempMod.undoIt();
}
//
// Description
//
// Whenever a connection is made to this node, this method
// will get called.
//
public override bool connectionMade(MPlug plug, MPlug otherPlug, bool asSrc)
{
if ( plug.attribute.equalEqual(inputSurface) ) {
MObject thisObj = thisMObject();
MPlug historyPlug = new MPlug( thisObj, mHasHistoryOnCreate );
historyPlug.setValue( true );
}
return base.connectionMade( plug, otherPlug, asSrc );
}
//
// Description
//
// Transforms the given components. This method is used by
// the move, rotate, and scale tools in component mode.
// The bounding box has to be updated here, so do the normals and
// any other attributes that depend on vertex positions.
//
// Arguments
// mat - matrix to transform the components by
// componentList - list of components to be transformed,
// or an empty list to indicate the whole surface
// cachingMode - how to use the supplied pointCache
// pointCache - if non-null, save or restore points from this list base
// on the cachingMode
//
public override void transformUsing(MMatrix mat,
MObjectArray componentList,
MVertexCachingMode cachingMode,
MPointArray pointCache)
{
apiMeshGeom geomPtr = meshGeom();
bool savePoints = (cachingMode == MVertexCachingMode.kSavePoints);
int i = 0, j = 0;
uint len = componentList.length;
if (cachingMode == MVertexCachingMode.kRestorePoints) {
// restore the points based on the data provided in the pointCache attribute
//
uint cacheLen = pointCache.length;
if (len > 0) {
// traverse the component list
//
for ( i = 0; i < len && j < cacheLen; i++ )
{
MObject comp = componentList[i];
MFnSingleIndexedComponent fnComp = new MFnSingleIndexedComponent( comp );
int elemCount = fnComp.elementCount;
for ( int idx=0; idx<elemCount && j < cacheLen; idx++, ++j ) {
int elemIndex = fnComp.element( idx );
geomPtr.vertices[elemIndex] = pointCache[j];
}
}
} else {
// if the component list is of zero-length, it indicates that we
// should transform the entire surface
//
len = geomPtr.vertices.length;
for ( int idx = 0; idx < len && j < cacheLen; ++idx, ++j ) {
geomPtr.vertices[idx] = pointCache[j];
}
}
} else {
// Transform the surface vertices with the matrix.
// If savePoints is true, save the points to the pointCache.
//
if (len > 0) {
// Traverse the componentList
//
for ( i=0; i<len; i++ )
{
MObject comp = componentList[i];
MFnSingleIndexedComponent fnComp = new MFnSingleIndexedComponent( comp );
uint elemCount = (uint)fnComp.elementCount;
if (savePoints && 0 == i) {
pointCache.sizeIncrement = elemCount;
}
for ( int idx=0; idx<elemCount; idx++ )
{
int elemIndex = fnComp.element( (int)idx );
if (savePoints) {
pointCache.append(geomPtr.vertices[elemIndex]);
}
geomPtr.vertices[elemIndex].multiplyEqual( mat );
geomPtr.normals[idx] = geomPtr.normals[idx].transformAsNormal( mat );
}
}
} else {
// If the component list is of zero-length, it indicates that we
// should transform the entire surface
//
len = geomPtr.vertices.length;
if (savePoints) {
pointCache.sizeIncrement = len;
}
for ( int idx = 0; idx < len; ++idx ) {
if (savePoints) {
pointCache.append(geomPtr.vertices[idx]);
}
geomPtr.vertices[idx].multiplyEqual( mat );
geomPtr.normals[idx] = geomPtr.normals[idx].transformAsNormal( mat );
}
}
}
// Retrieve the value of the cached surface attribute.
// We will set the new geometry data into the cached surface attribute
//
// Access the datablock directly. This code has to be efficient
// and so we bypass the compute mechanism completely.
// NOTE: In general we should always go though compute for getting
// and setting attributes.
//
MDataBlock datablock = _forceCache();
MDataHandle cachedHandle = datablock.outputValue( cachedSurface );
apiMeshData cached = cachedHandle.asPluginData as apiMeshData;
MDataHandle dHandle = datablock.outputValue( mControlPoints );
// If there is history then calculate the tweaks necessary for
// setting the final positions of the vertices.
//
if ( hasHistory() && (null != cached) ) {
// Since the shape has history, we need to store the tweaks (deltas)
// between the input shape and the tweaked shape in the control points
// attribute.
//
buildControlPoints( datablock, (int)geomPtr.vertices.length );
MArrayDataHandle cpHandle = new MArrayDataHandle( dHandle );
// Loop through the component list and transform each vertex.
//
for ( i=0; i<len; i++ )
{
MObject comp = componentList[i];
MFnSingleIndexedComponent fnComp = new MFnSingleIndexedComponent( comp );
int elemCount = fnComp.elementCount;
for ( int idx=0; idx<elemCount; idx++ )
{
int elemIndex = fnComp.element( idx );
cpHandle.jumpToElement( (uint)elemIndex );
MDataHandle pntHandle = cpHandle.outputValue();
double[] pnt = pntHandle.Double3;
MPoint oldPnt = cached.fGeometry.vertices[elemIndex];
MPoint newPnt = geomPtr.vertices[elemIndex];
MVector offset = newPnt.minus( oldPnt );
pnt[0] += offset[0];
pnt[1] += offset[1];
pnt[2] += offset[2];
pntHandle.Double3 = pnt;
}
}
}
// Copy outputSurface to cachedSurface
//
if ( null == cached ) {
MGlobal.displayInfo("NULL cachedSurface data found");
}
else {
cached.fGeometry = geomPtr;
}
MPlug pCPs = new MPlug( thisMObject(), mControlPoints );
pCPs.setValue(dHandle);
// Moving vertices will likely change the bounding box.
//
computeBoundingBox( datablock );
// Tell Maya the bounding box for this object has changed
// and thus "boundingBox()" needs to be called.
//
childChanged( MChildChanged.kBoundingBoxChanged );
}
public override bool connectionBroken(MPlug plug, MPlug otherPlug, bool asSrc)
//
// Description
//
// Whenever a connection to this node is broken, this method
// will get called.
//
{
if ( plug.attribute.equalEqual(inputSurface) ) {
MObject thisObj = thisMObject();
MPlug historyPlug = new MPlug( thisObj, mHasHistoryOnCreate );
historyPlug.setValue( false );
}
return base.connectionBroken( plug, otherPlug, asSrc );
}
public override void redoIt()
{
MObject dependNode = new MObject();
MOStream stdoutstream = MStreamUtils.stdOutStream();
for (; !iter.isDone; iter.next())
{
// Get the selected dependency node and create
// a function set for it
//
try
{
iter.getDependNode(dependNode);
}
catch (System.Exception)
{
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "Error getting the dependency node");
continue;
}
MFnDependencyNode fnDN;
try
{
fnDN = new MFnDependencyNode(dependNode);
}
catch (System.Exception)
{
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "Error creating MFnDependencyNode");
continue;
}
MFnTypedAttribute fnAttr = new MFnTypedAttribute();
MObject newAttr = fnAttr.create("blindDoubleData", "BDD", blindDoubleData.tid);
try
{
fnDN.addAttribute(newAttr, MFnDependencyNode.MAttrClass.kLocalDynamicAttr);
}
catch (System.Exception)
{
// do nothing
// addAttribute only need call once, the redundant calls will return false (throw exception)
}
// Create a plug to set and retrieve value off the node.
//
MPlug plug = new MPlug(dependNode, newAttr);
// ----------------------------------- Attention ------------------------------------
// --------------------------------- Downcast Begin -----------------------------------
// the following codes are used to get the c# object
//
MFnPluginData pdFnCreator = new MFnPluginData();
// 1. you cannot gain blindDoubleData by the following code
// {code}
// blindDoubleData newData = new blindDoubleData()
// {code}
// As we need to keep the relationship between c# impl and c++ instance pointer
// We cannot use the above ctor codes, otherwise, the mandatory information used for down casting is omitted
// 2. you cannot use the tempData gained by the following code
// {code}
// MObject tempData = pdFnCreator.create(blindDoubleData.tid);
// {code}
// reason:
// tempData is useless, we cannot use tempData to do downcast
// the create function gains the tempData by the following code
//
// {code}
// newHandle = new MObject(mayaHandle);
// {code}
//
// the mayaHandle is the actual pointer, which we store. But we have no information about the newHandle
// the return object is useless. the data we needed is stored in pdFnCreator
pdFnCreator.create(blindDoubleData.tid);
// 3. get "the data" we needed
blindDoubleData newData = pdFnCreator.data() as blindDoubleData;
// ---------------------------------- Downcast End -----------------------------------
if (newData == null)
{
continue;
}
newData.value = 3.2;
plug.setValue(newData);
// Now try to retrieve the value of the plug as an MObject.
//
MObject sData = new MObject();
try
{
plug.getValue(sData);
}
catch (System.Exception)
{
continue;
}
// Convert the data back to MPxData.
//
MFnPluginData pdFn = new MFnPluginData(sData);
blindDoubleData data = pdFn.data() as blindDoubleData;
// Get the value.
//
if (null == data)
{
// error
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "error: failed to retrieve data.");
}
MStreamUtils.writeLine(stdoutstream);
MStreamUtils.writeCharBuffer(stdoutstream, ">>>>>>>>>>>>>>>>>>>>>>>> blindDoubleData binary >>>>>>>>>>>>>>>>>>>>");
MStreamUtils.writeLine(stdoutstream);
data.writeBinary(stdoutstream);
MStreamUtils.writeLine(stdoutstream);
MStreamUtils.writeCharBuffer(stdoutstream, ">>>>>>>>>>>>>>>>>>>>>>>> blindDoubleData ascii >>>>>>>>>>>>>>>>>>>>");
MStreamUtils.writeLine(stdoutstream);
data.writeASCII(stdoutstream);
}
return;
}
public override void redoIt()
{
MObject dependNode = new MObject();
MOStream stdoutstream = MStreamUtils.stdOutStream();
for(; !iter.isDone; iter.next())
{
// Get the selected dependency node and create
// a function set for it
//
try
{
iter.getDependNode(dependNode);
}
catch (System.Exception)
{
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "Error getting the dependency node");
continue;
}
MFnDependencyNode fnDN;
try
{
fnDN = new MFnDependencyNode(dependNode);
}
catch(System.Exception)
{
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "Error creating MFnDependencyNode");
continue;
}
MFnTypedAttribute fnAttr = new MFnTypedAttribute();
MObject newAttr = fnAttr.create("blindDoubleData", "BDD", blindDoubleData.tid);
try
{
fnDN.addAttribute(newAttr, MFnDependencyNode.MAttrClass.kLocalDynamicAttr);
}
catch (System.Exception)
{
// do nothing
// addAttribute only need call once, the redundant calls will return false (throw exception)
}
// Create a plug to set and retrieve value off the node.
//
MPlug plug = new MPlug(dependNode, newAttr);
// ----------------------------------- Attention ------------------------------------
// --------------------------------- Downcast Begin -----------------------------------
// the following codes are used to get the c# object
//
MFnPluginData pdFnCreator = new MFnPluginData();
// 1. you cannot gain blindDoubleData by the following code
// {code}
// blindDoubleData newData = new blindDoubleData()
// {code}
// As we need to keep the relationship between c# impl and c++ instance pointer
// We cannot use the above ctor codes, otherwise, the mandatory information used for down casting is omitted
// 2. you cannot use the tempData gained by the following code
// {code}
// MObject tempData = pdFnCreator.create(blindDoubleData.tid);
// {code}
// reason:
// tempData is useless, we cannot use tempData to do downcast
// the create function gains the tempData by the following code
//
// {code}
// newHandle = new MObject(mayaHandle);
// {code}
//
// the mayaHandle is the actual pointer, which we store. But we have no information about the newHandle
// the return object is useless. the data we needed is stored in pdFnCreator
pdFnCreator.create(blindDoubleData.tid);
// 3. get "the data" we needed
blindDoubleData newData = pdFnCreator.data() as blindDoubleData;
// ---------------------------------- Downcast End -----------------------------------
if (newData == null)
continue;
newData.value = 3.2;
plug.setValue(newData);
// Now try to retrieve the value of the plug as an MObject.
//
MObject sData = new MObject();
try
{
plug.getValue( sData );
}
catch (System.Exception)
{
continue;
}
// Convert the data back to MPxData.
//
MFnPluginData pdFn = new MFnPluginData( sData );
blindDoubleData data = pdFn.data() as blindDoubleData;
// Get the value.
//
if ( null == data ) {
// error
MStreamUtils.writeCharBuffer(MStreamUtils.stdErrorStream(), "error: failed to retrieve data.");
}
MStreamUtils.writeLine(stdoutstream);
MStreamUtils.writeCharBuffer(stdoutstream, ">>>>>>>>>>>>>>>>>>>>>>>> blindDoubleData binary >>>>>>>>>>>>>>>>>>>>");
MStreamUtils.writeLine(stdoutstream);
data.writeBinary(stdoutstream);
MStreamUtils.writeLine(stdoutstream);
MStreamUtils.writeCharBuffer(stdoutstream, ">>>>>>>>>>>>>>>>>>>>>>>> blindDoubleData ascii >>>>>>>>>>>>>>>>>>>>");
MStreamUtils.writeLine(stdoutstream);
data.writeASCII(stdoutstream);
}
return;
}
