EvaluateLocalTransform but based on an FBXAnimLayer

[Anonymous]

I have an FBX file with a lot of skeletal animations in it, and I needed to be able to get local transforms for each node to use in my game engine.

However, FbxNode::EvaluateLocalTransform seems to not have any arguments that allow you to specify which animation layer you're trying to get the transform for - what do I have to do to get the matrix from EvaluateLocalTransform manually?

I seem to be able to get translation/rotation/scaling values by time for an animation layer with something like "node->LclRotation.GetCurve(animlayer, FBXSDK_CURVENODE_COMPONENT_Z);" but I have no idea how to convert those to the results that EvaluateLocalTransform would give..

Please help me, I am pulling my hair out over this.

[regalir · Accepted solution]

The EvaluateLocalTransform will use all the AnimLayers defined for the current AninStack. The AnimationLayers are like Photoshop layers, they are used to "blend" different animations curves to produce a final one.

Each animLayer can be muted so, I guess, you could mute all the AnimLayers except the one you are interested in and evaluate as normal. The code may look like this:

lScene->SetCurrentAnimationStack(lStackOfInterest);
for (int i=0; i < lStackOfInterest->GetMemberCount(); i++)
{
    FbxAnimLayer* layer = FbxCast<FbxAnimLayer>(lStackOfInterest->GetMember(i);
    if (layer)
       layer->Mute.Set(true);
}

 Alternatively, to encapsulate this even more, you can consider implementing your own Evaluator and replace the default one.