[R] rgl plot rotation with device other than mouse

[santiago gil]

Well, I haven't built the device yet, I'm trying to figure out what my
options will be. In the case of plugging in a simple USB trackball, I
suppose it can work with the HID Manager in Mac to customize the signal
from it.

In general, would it be possible to manipulate the plot, say for example,
with a standard joystick? Is there something "deeper" in the code that I
could look towards to make this possible? Or any other library that might
support something like this?

2015-10-27 14:17 GMT-04:00 Duncan Murdoch <murdoch.duncan at gmail.com>:

> On 27/10/2015 1:38 PM, santiago gil wrote:
>
>> Hello R,
>>
>> I'm trying to figure out if it would be possible use a device (maybe
>> simply
>> a trackball) separate from the mouse that would have the ability to rotate
>> a 3D plot made with rgl without any buttons. This is to build an
>> interactive "demo"-like piece for which a mouse or trackpad is an
>> unsatisfactory manipulation tool. The worse solution would be to make the
>> trackpad button "sticky" so that it works as a rotation on/off toggle.
>> Anything that is less intrusive with the computer's operability is even
>> better. I couldn't find the right way in par3d or anything of the sort.
>> Any
>> tips anybody? Or any other libraries to would use to do something like
>> this?
>>
>
> Do you know how to get input from that device?  If so, you can explicitly
> set par3d("userMatrix") to a rotation
> matrix based on the input.
>
> rgl itself has no support for getting input from anything other than the
> mouse and keyboard.
>
> Duncan Murdoch
>



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