[PD] gimbal lock solution?

[Roman Haefeli]

I believe it is (unfortunately) not as simple as that. When you rotate
with [rotateXYZ], the three axis are not always perpendicular to each
other. For instance, if you set Y to 90, the X and the Z rotate around
the same axis. 

However, the gyroscope (at least the one from Wiimote MotionPlus and
most likely also the one from your phone) consists of three separate
sensor which are perpendicular to each other at any time. 

If I understand Fero correctly, he would like to use the sensors so he
can control an object in Gem that follows exactly the orientation of his
phone. I also tried that once with a Wiimote and Gem but I couldn't wrap
my head around the two concepts of [rotateXYZ] and the gyro sensors.

Anyone enlightened might be able to shed some light on this confusion?

Roman


 

On Sam, 2013-02-09 at 15:18 +0100, Cyrille Henry wrote:
> hello,
> 
> rotateXYZ is doing : rotation X then  rotation Y then rotation Z
> 
> this is not the same than :
> rotation Z
> rotation Y
> rotation X
> 
> So, depending on how works your orientation sensors, you could have to change the rotation order.
> 
> you can try, using 3 rotateXYZ object.
> 
> cheers
> c
> 
> 
> 
> Le 09/02/2013 14:45, Fero Kiraly a écrit :
> > I have 3 axis accelerometer and 3 axis orientation sensor in my device.
> > So i can get 0 - 360 deg on X, Y and Z.
> >
> >
> > When I draw in GEM a rectangle, I am able to rotate it with each of 3 axes, but only separately. When I try it  with all three axes together
> > it has strange movements, so I guess it has something with gimbal lock.
> >
> >
> >
> >
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