Sample Skeletal API Driver

[BenWoodford]

Something as simple as an "idle animation" driver that provides slowly moving data of an idle hand moving fingers to a fist and back would be more than sufficient, especially if it had splay data too. Or a driver that uses Leap Motion inputs and translates them to the skeletal API.

We can't encourage hardware manufacturers to build drivers for this if they have nothing to use as point of reference after all

[Lhun]

https://github.com/spayne/soft_knuckles Is something I came across a while back, I know it's not exactly what you're looking for but it may help.

[spayne]

https://github.com/spayne/soft_knuckles Is something I came across a while back, I know it's not exactly what you're looking for but it may help.

I wrote that soft_knuckles last year. I just now updated it to change the hand skeletons to pop between open hand and fist. This video clip shows telnet which triggers the fake controller on the left and then in the background you can see the hand popping from closed to open. https://www.youtube.com/watch?v=1ukGHi0VkGs&feature=youtu.be

This is only a low level API demonstration though. It just calls IVRDriverInput::UpdateSkeletonComponent, alternating between two arrays of bone transforms).https://github.com/spayne/soft_knuckles/blob/06e12804b7bc83700ba3e5e312754fad32582afa/soft_knuckles_device.cpp#L291

Like @Lhun said - it's not exactly what you are looking for...

The harder part. To do the hand skeleton aspect of a controller driver whether or not it is a real or example, one would need to consider the following:

• how are you sensing hand positions and possibly sensing hand sizes. If directly you will do forward kinematics, if indirect inverse kinematics.
• what coordinate space your sensing data is vs Valve's. You'll have to map.
• what bone model you are using vs Valve's. You'll have to map.
• what is the geometry of your controller. Affects hand IK.
• do the components on your controller move? Affects hand IK.
• how are you doing overall controller positional tracking (ie using vive trackers?), Affect root bone.
• are you going to animate between positions. If you aren't popping, then you'll need some animation system.

[SDraw]

Indeed. This could help a lot, especially with initial transformations for right hand that has disabled mirroring in applications by default. P.s. Figured it out, but it can be a total nightmare for a lot of new developers.