Get Camera Matrix From An Existing Camera In The Scene

[daviddoria]

I am trying to get the camera1.matrix attribute from an existing camera in a scene.
I thought this would do it (although it seems like a ridiculous amount of code to get that), but it just keeps giving me back an identity matrix (I'm assuming the default return?). Anything blatantly wrong here?

MFnDagNode dagNodCam;
args.get(1,strCamera);
MObject CamObjectParent, CamObjectChild;
MSelectionList activeListCam;
activeListCam.add(strCamera);
MFnCamera fnCamera;
MItSelectionList iterCam(activeListCam);
iterCam.getDependNode(CamObjectParent);
dagNodCam.setObject(CamObjectParent);
CamObjectChild = dagNodCam.child(0);
MDagPath pathToCamera;
MDagPath::getAPathTo(CamObjectChild, pathToCamera);
fnCamera.setObject(pathToCamera);
MMatrix CameraMatrix = fnCamera.transformationMatrix();
MObject MatrixObject = fnCamera.attribute( "matrix" );
MFnMatrixData worldMatrixData(MatrixObject);
MMatrix worldMatrix = worldMatrixData.matrix();

fout_Info << worldMatrix << endl;

Thanks!

David

[rob-bateman]

CODE
//...

MPlug MatrixPlug = fnCamera.findPlug( "matrix" );
MObject MatrixObject;
MatrixPlug.getValue(MatrixObject);

//...

[daviddoria]

I found the problem, but I'm not sure how to fix it.

MFnTransform CameraTransform(CamObjectParent);
fout\_Info << "Parent type: " << CamObjectParent.apiTypeStr() << endl;
CamObjectChild = CameraTransform.child(0);
fout\_Info << "Child type: " << CamObjectChild.apiTypeStr() << endl;

CamObjectParent is type kTransform
CamObjectChild is type kCamera
so far so good.

MFnCamera fnCamera(CamObjectChild);
fout\_Info << "Camera Name: " << fnCamera.name() << endl;

the name is cameraShape1!!! This has much different attributes than camera1

Why is it giving me cameraShape1??

Thanks,

Dave

[daviddoria]

bahhh scratch that... the kTransform IS the camera1 that i'm looking for!!

[heron3d]

lol