I cant picture how he is able to use the design you posted. Maybe Im missing something.
When I think of only having one foot to try to play.. I would think that you would want the toes to lock the stick.. and the heel to hit buttons. The heel would have large buttons on both left and right of his heel.. as well as underneath it. The bottom button requiring more resistance so you can rest on it without activation.. or could be an analog pedal.
Now that I think of it.. the heel can swing in a pretty decent arc of angles. So you could make a semi-circle of buttons below the heel. If he can raise the heel.. that means his knee is able to be used to push a button as well.
X, dearest X. I don't usually reply to you, last 2 years or so if you haven't noticed, but this is something I'll address.
No, you're wrong. Not in the design, I'm sure that for someone who doesn't have CP or maybe somebody whose CP has afflicted them differently that design could work, but in this case you're wrong. I think its interesting that while I spent hours watching M play, and talking to him about his needs, you have a "better" design after having done none of that.
I could explain how the foot has more mechanoreceptors in the toes than in the heel, how M has already adapted to using his toe thereby increasing tactile acuity through repetition, how his heal doesn't even touch the pad or anchor to anything because his CP has curled his foot, how ankle actuation is difficult to control, how we looked at knee switches discarded them due to inutility and the and any other number of reason but that would do little to convince you of anything I'm sure so I only mention it as a PSA to others reading this.
So to sum up, yes you are missing a lot.
I understand about the foot controller, but can he keep his eyes and head stable during play?
Somewhat. I found this searching for CP applications:
You can see about half way through how long it takes to activate a selection due to all the movement, this is similar to M. Similar but not the same, all CP is different I guess. M is really fortunate that he's cultivated the control of his foot in the manner that he has. It speaks to his fortitude.
About a week and a half in and the report from M is that the controller works great and no changes to the design required as of now. We will wait a few more weeks and check back in.
Clearly you and M are both wrong, Xuoche says so. Tell him you're going to design it to X's specs and he's going to have to adjust. The gull of M to not learn to use X's controller scheme. I am disappointment.
Clearly.
I'll check with the family again about those games, they didn't get back to me last time.