MFnComponentListData::kComponentList

[nadia-hasan--2]

I have a plug in my custom mesh node called "input_cpList"("inputComponents"), which is dealing with data type, MFnComponentListData::kComponentList; where I am trying to assigne value from a mesh selected in Maya interface.

But i do not know which plug of Mesh ShapeNode should be connected to "input_cpList""("inputComponents"). I want to get all polygon IDs.

So far I have MFnMesh data inside compute function from the selected mesh in Maya. I am not sure which plug or attribute of Mesh shape node is dealing with polygon component data(specially Polygon IDs stored in), so I can directly connect that attribute, with "input_cpList" attribute of my custom node in MEL or API. Hope I could explain my question.

Many thanks in Advance. Please help.

inputMesh = typeAttr.create(

"inputMesh", "inMesh", MFnData::kMesh,&stat );

input_cpList = typeAttr.create(

"inputComponents", "ics",

MFnComponentListData::kComponentList);

[joojaa]

I am not sure which plug or attribute of Mesh shape node is dealing with polygon
component data(specially Polygon IDs stored in)

No such plug exists. Component data plugs represent a signal for need of some data, maya will give all data it has available within that dataset (you can ask for more maya just gives you all it has). Its not meant for signaling the state of the shape. If you want to know what ids them mesh has available youd read it form your inputMesh plug. Its simply just 0 to number of polygon faces. *

If however you need to signal in that this node need to operate on such and such subset of the node then what you do is in the command that creates the node you write in the selection data into the slot, OR use a set to convey the information. Maya does not care if the range is not valid as i said above.

Try not to guess how maya works. Try to actually look at how it does things instead.

• to elborate NO PLUG of kComponentList type exists, that tells what the entire mesh shapes entire list is. Does not mean you cant figure it out. Just no need to either you can jsut say the entire range between here and infinity and all operations would work correct anyway. But basically the node has little need for selections other than for set operations, and since it knows its internals it has no need to communicate this kind of info trough some connection, because for full set you communicate entire shape node.

[nadia-hasan--2]

Hi Joojaa,

Thanks for the reply. I could found my answer after leaving the post here. I forgot to delete the question.

I did found there is no such plug.

Many thanks for sharing knowledge.

Are you some one from Autodesk? Just from curiosity, asking you this question:)

Kind regards

Sama