Get the key frame values

[goliveira]

Following my previous question I keep hacking in the quest of finding out how to get the keyframe info from the joints.

Yet, I found a sample animImportExport that retrieves this info. However, it copies the info to a clipboard and then access the data.

I am quite confused as I step through the code. Do I really need to copy the data to the clipboard to get the key frame info? It sounds like I am asking if I really need to stop at New York, if going from Los Angeles to San Diego

Anyhow, what I really don't get it is how to initialize the class

MFnAnimCurve

My guess is if i intialize this class correctly I can retrieve key frames and values from it.

Any help how I can do that? I tried many things but the constructor always fails when creating it.

thanks!

tchau,
Gustavo.

[ferreel]

Gustavo,

I'm pretty sure that MFnAnimCurve will do what you want. I haven't worked with joints at all, but i would expect that keyframes are stored the same way throughout Maya. If not, ignore this thread.

Anyhow...

First remember that keyframes are stored in a dependency node. This is what MFnAnimCurve wants as an argument in the constructor. Get this by finding the input connection to the attribute you're looking for, travel up the graph from this to the animCurve node. Use this node as your object in the MFnAnimCurve constructor.

MPlug works very well for finding the animcurve dependency node. Simply set it to the plug you have keyframed and get the input connection to it:

MPlug::connectedTo ( MPlugArray & array , bool asDst (true), bool asSrc (false), MStatus * ReturnStatus = NULL )

Then use

MFnAnimCurve fnAnim(array[0].node());

You should now be able to check out the keyframes using the function set.

Hope this was of some help.

ferreel

[mmiranda]

Hello Gustavo

Im trying to do the same as you. I want to extract the information of an animated character. It has joints and one mesh. The character is animated with several keyframes and it is supossed that I need to extract the information about the changes of the joints and the mesh polygons in each keyframe. I have been working with the MFnAnimCurve class and I am obtaining some frames and the times they occurs, but I am getting more than one curve and of course lots of frames that I dont want. I would like to know how do you solve your problem of getting the key frames values.

Thanks a lot for your help,
Margarita