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();
}
private void addSelectedButton_Click(object sender, EventArgs e)
{
if (currentInfo == null)
{
return;
}
MDagPath node;
MObject component = new MObject();
MFnDagNode nodeFn = new MFnDagNode();
MSelectionList selected = new MSelectionList();
MGlobal.getActiveSelectionList(selected);
for (uint index = 0; index < selected.length; index++)
{
node = selected.getDagPath(index, component);
nodeFn.setObject(node);
MGlobal.displayInfo($"{nodeFn.name} - {nodeFn.fullPathName} - {component.apiType}");
}
}
private void assignShadingGroup(MObject transform, string groupName)
{
// Get the name of the mesh node.
//
// We need to use an MFnDagNode rather than an MFnMesh because the mesh
// is not fully realized at this point and would be rejected by MFnMesh.
MFnDagNode dagFn = new MFnDagNode(transform);
dagFn.setObject(dagFn.child(0));
string meshName = dagFn.name;
// Use the DAG modifier to put the mesh into a shading group
string cmd = "sets -e -fe ";
cmd += groupName + " " + meshName;
dagMod.commandToExecute(cmd);
// Use the DAG modifier to select the new mesh.
cmd = "select " + meshName;
dagMod.commandToExecute(cmd);
}
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();
}
private void assignShadingGroup(MObject transform, string groupName)
{
// Get the name of the mesh node.
//
// We need to use an MFnDagNode rather than an MFnMesh because the mesh
// is not fully realized at this point and would be rejected by MFnMesh.
MFnDagNode dagFn = new MFnDagNode(transform);
dagFn.setObject(dagFn.child(0));
string meshName = dagFn.name;
// Use the DAG modifier to put the mesh into a shading group
string cmd = "sets -e -fe ";
cmd += groupName + " " + meshName;
dagMod.commandToExecute(cmd);
// Use the DAG modifier to select the new mesh.
cmd = "select " + meshName;
dagMod.commandToExecute(cmd);
}
