creating custom motion file

[saisubramaniam147]

If I want to create my own motion file, is there a code or package I can use? The documentation mentions '3D rotations for spherical joints are specified as quaternions ', may I know how you are obtaining the keyframes and then converting them to quaternions?

[xbpeng]

Most formats like bvh and fbx store the keyframes are joint rotations, so you can just convert those to quaternions and copy them over into the specified format.

[zhouzhq7]

Hi, I know how to transfer 3D Euler spatial rotation into quaternion. But I am wondering how to transfer 3d joint rotation into 1D rotation, since each joint has 3D rotation info in most of bvh files, such as the ones from CMU mocap dataset. May I know how you get the 1D rotation from the raw MOCAP data?

[Somedaywilldo]

Hello, I'm trying to create my own motion file, too. All I get is the 3D position(i.e. (x,y,z) ) of each joint. Also want to know if there exists packages converting these to rotations.

[xbpeng]

If you just have 3D joint positions, you can use inverse kinematics to calculate the corresponding joint rotations. There's probably some library out there that implements IK already.

[Somedaywilldo]

Thank you! I'll try later.

[EnricoBeltramo]

@Somedaywilldo did you find something? I need to do same thing.

[angelaslin]

How did you convert from the AMC/ASF files in the CMU motion capture database to the data files used in this project?

[sloganking]

@zhouzhq7 regarding converting 3D rotations to 1D, Isn't only one dimension of those three dimensions changed for knee and elbow joint rotation? It is in Unity which uses Euler rotations

[cangcui]

In my .bvh file, all of the joint(including the root and other joints) has 6 channels(xposition, yposition, zposition, zrotation, yrotation, xrotation) in the frame data, I converted the [zrotaion, yrotation, xroation] to the quaternion, but how to keep the [xposition, yposition, zposition] data in the motion file? Where should I adapt some code in Deepmimic project to support this specified format of motion file?

[skylbc]

@zhouzhq7 I want to create my own motion file use bvh file，if you have solved this problem,can you told me import bvh file?

[sloganking]

I've been working on converting .fbx file animations to mimic motion files in my own repository. If anyone has the same goal and would like to help, contributions are welcome. Here's my progress so far:

[sloganking]

I am now also working on converting .bvh files as I noticed the file format appears much easier to work with than .fbx files. Project repo found here. All contributions are welcome.

[xbpeng]

awesome, thanks! This could be very helpful.

[sxhzju]

I've been working on converting .fbx file animations to mimic motion files in my own repository. If anyone has the same goal and would like to help, contributions are welcome. Here's my progress so far:

Yes I need to achieve the same goal, (especially motion from SFV). So what's your newest progress?

[BartMoyaers]

@SleepingFox88 and myself have been working on the .bvh to DeepMimic conversion.
You can find the current state of affairs in this repository.

Check it out, and help is always appreciated.

Here are some example conversions from this database: