public override void doIt(MArgList args)
{
// Command line argument specifies type of primitive to create
//
shapeFlag = 1;
if (args.length > 0)
{
shapeFlag = args.asInt(0);
}
// Create the mesh and its transform.
try
{
createNodes();
}
catch (System.Exception)
{
// If the creation failed, clean up any partial changes made.
dagMod.undoIt();
throw; //Rethrow the same exception
}
return;
}
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();
}
public override void undoIt()
{
modifier.undoIt();
return;
}
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();
}