Forum Discussion
What is proper sensitivity for 1:1 hydra movement?
I'm trying to get 1:1 movement for hydra controllers in Unity. So far, I've been eyeballing it, and I've settled for 0.00066 sensitivity for XYZ. But what is the "proper" sensitivity? How do I even...
Hydra units are reported in millimeters, so your multiplier will depend on what scale you use for building content in Unity. It's recommended to use 1 unit = 1 meter (which is what physics are tuned for) which would require you to multiply the units reported by the Hydra by 0.001 (1/1000) like drash already said.
But as COZ already mentioned, the Hydra's magnetic field is easily distorted by your environment, and starts to get noticeably off beyond 3 or so feet from the base unit - I usually leave my base off to one side, and find that with both arms extended out to my sides, the farther arm can report up to a foot longer than the other!
A fun experiment is to take a meter length of PVC pipe (don't use anything metallic) and duct tape a controller at each end, then visualize the over/under distance reported from the Hydra as you move the controllers around the space. Also note how the distance/positions changes just by changing the rotations of the controllers.
You can get a sense for how Clang's Hydra calibration works in this video:
https://docs.google.com/file/d/0Bz1TkfNuGaNjT3cxX1U1NzI3Yzg/edit?usp=sharing
The separate blue and green lines represent the values reported by Hydra vs the in-game model (which also accounts for users of different sizes / proportions / sitting vs standing / etc. than the in-game avatar).
But as COZ already mentioned, the Hydra's magnetic field is easily distorted by your environment, and starts to get noticeably off beyond 3 or so feet from the base unit - I usually leave my base off to one side, and find that with both arms extended out to my sides, the farther arm can report up to a foot longer than the other!
A fun experiment is to take a meter length of PVC pipe (don't use anything metallic) and duct tape a controller at each end, then visualize the over/under distance reported from the Hydra as you move the controllers around the space. Also note how the distance/positions changes just by changing the rotations of the controllers.
You can get a sense for how Clang's Hydra calibration works in this video:
https://docs.google.com/file/d/0Bz1TkfNuGaNjT3cxX1U1NzI3Yzg/edit?usp=sharing
The separate blue and green lines represent the values reported by Hydra vs the in-game model (which also accounts for users of different sizes / proportions / sitting vs standing / etc. than the in-game avatar).