MFnMeshData and MFnMesh

[garion-mail]

Hi all!

I'm trying to get mesh data (i.e. vertices and polygons) from my kMesh input plug in my shape node. I'm doing this outside compute (i.e. drawing functions).

What I don't get is how MFnMeshData and MFnMesh relates. Can I get a MFnMesh from an MFnMeshData? How?

For example I've tried this:

MPlug plug( thisMObject(), output );
MDataBlock data = forceCache();
MDataHandle meshh = plug.constructHandle(data);
MObject obj = meshh.asMesh();
MFnMesh mesh(obj, &status);

But status reports "Argument is NULL pointer".

Is this even close?

Please help!

Cheers!
Garion

[garion-mail]

I got it working. I guess I was pretty close after all. This is what did the trick if anyone is interested.

MPlug plug( thisMObject(), output );

MStatus status;
MObject obj;
plug.getValue(obj);
MFnMeshData meshData(obj, &status);
if (!status)
{
	status.perror("Unable to get mesh data");
	return;
}

obj = meshData.object(&status);
if (!status)
{
	status.perror("Unable to get mesh object");
	return;
}

MFnMesh mesh(obj, &status);
if (!status)
{
	status.perror("Unable to get mesh");
	return;
}