Therapist UI: Make it possible to control motor space size

[bastianilso]

Currently we only provide Unity controls for the motor space, but this would in fact be interesting for therapists to use, to adjust difficulty of an exercise.

[bastianilso]

Currently we have the idea to implement this as a calibration step - it otherwise creates too many controls for the therapist (position X, Y, Z, width, height).

• we introduce a button next to the eye tracking, for calibrating the motor space.
• When you press the button, the VR instructions update and asks the patient to move his/her controller around in a circle, as far as he/she can. As he/she does, small spheres appear.
• The game then sizes and positions the motor space for the patient. A single slider allows the therapist to enlarge or shrink the motorspace.

[bastianilso]

Initial implementation of motor-calibration.

Todo:

• Add a UI slider which the therapist can use to control the size of the space relative to the calibration size.
• Load/Save Motor Space Size/Position Settings on a per profile basis.
• Log changes made to the motor space.

[bastianilso]

111 addresses UI slider and logging. I will close this issue for now and we will see whether remembering the motor space will be important later.