How to get The transform Matrix of a Node In a Specify Time

[andrestronic12]

Hi.

People in this moment I have a big problem, I have a simple animation using Maya CubeMan, I can get the Fps values and the time of the animation but, When I get the Matrix in a specify time from a node is always the same is a Identity Matrix But my Node is Rotating in the animation here my code.

myTakeCount = importer.GetTakeInfo(0)
print(myTakeCount.mName, 'Name Of the animation take')#Imprimo el nombre de la toma
start = myTakeCount.mLocalTimeSpan.GetStart()
end = myTakeCount.mLocalTimeSpan.GetStop()


b = scene.GetNode(2)
print(b.GetName(), 'Name of de Node')





CurrenTime = FbxTime()
for i in range(start.GetFrameCount(FbxTime.eFrames24), end.GetFrameCount(FbxTime.eFrames24)):

    CurrenTime.SetFramePrecise(i, FbxTime.eFrames24)
    TransforMatrix = b.EvaluateGlobalTransform(CurrenTime, FbxNode.eSourcePivot, False, False)
    print("imprimiendo Matrix De Transformacion")
    print(*TransforMatrix[0])
    print(*TransforMatrix[1])
    print(*TransforMatrix[2])
    print(*TransforMatrix[3])

print("Finalizar")

Thanks

[ilan.keshet · Accepted solution]

I had a look at your FBX file -- you have all your animation keys directly on the mesh itself -- which is not something I handle.  -- Usually you have animations on joints that deform the mesh, -- but in your case you don't have deformation, -- but in terms for scalability it's still much better to have skinned animation, but more time consuming to implement.

I'm not super familar with python fbx handling -- but for me, I walk the entire hierarchy of the fbx scene, and then grab out animation keys on the node. 

I'm assuming your line of code taking the take from "GetTakeInfo(0)" -- is breaking your stuff. 

Each FbxNode has it's own list of takes, and yours is probably returning empty because it is just the take on the first root node. -- Which in your scene has no animation keys. 

[andrestronic12]

Hey Thank you.

Yes My fbx File has two takes, In the first take there is no animation, In the other Yes, My animation is on the mesh beceause I just only need an example to take Matrix Transformation for the Nodes animation.

my next Objetive is to get the mesh deformations and play the animation

Thank you so Much.

[ilan.keshet]

If you want mesh deformations to work, -- you need to pretty much change everything with your scene. 

Also requires somebody with experience with generating a rigged model, though I suppose anyone can learn it

[andrestronic12]

Hi. 

Thanks, In this model I don't need to change anything, I only need one Example to Get the transformation Matrix in a specify time "I'm not  3D artist" I just need to play simple animations in the program, Other person will make the animatios, Thanks