Nunchuk Yaw data problems

I need help about enabling the ir tracking for the nunchuk I have tried
// wiiuse_set_nunchuk_orient_threshold(WPAD_CHAN_0, 1.0f);
but no luck.
Many thanks in advance

"ir tracking for the nunchuk"?

The nunchuk has an accelerometer, joystick and buttons. What are you trying to do?

I am trying to use the orient.yaw, orient.pitch and orient.roll data from the nunchuk to track the movements of the nunchuk but have two problems pitch and roll both work but by default the yaw data is always set to 0
The second issue is that I need to set a threshold so that not every change in the angles is an event.
So I am after the orientation data of the nunchuk
Hope that is clearer
Cheers
Violino

The nunchuk doesn't have a yaw. The nunchuck 'senses' gravity, and from that it can calculate yaw/pitch.

OK but how do I enable the Ir Tracking of the Nunchuk so that the orient.yaw is not always giving me 0

Look at the nunchuk, notice that it's missing an IR sensor.

So:
1) Grab your favorite soldering iron, add it yourself, hack everything else around it to use it.
or:
2) You're out of luck. PERIOD.

(I want the Wii to bake me apple pie! And a pony)



Edited 1 time(s). Last edit at 11/24/2010 02:56PM by Daid.

I am aware that it does not have any infra red sensor but what I need to get is the orientation angle for yaw I am able to get values for orient.pitch and values for orient.roll but the orient.yaw value is always 0 is it ever possible to get a value for the orient.yaw and if so how?

orient.yaw = rand();

orient.yaw is read only and the problem is that when I look at the data by using the code below I am getting values for orient.pitch and orient.roll but nothing for orient.yaw

      WPAD_Orientation(WPAD_CHAN_0, &orient);
	struct expansion_t data;
     WPAD_Expansion(WPAD_CHAN_0, &data);
     data.nunchuk.orient_threshold = 0.5f;
      rquadnunchuklateral = data.nunchuk.orient.yaw * 180 / PI ;
	rquadnunchukvertical = data.nunchuk.orient.pitch * 180.0 / PI;
	rquadnunchukroll = data.nunchuk.orient.roll * 180.0 / PI;

U can try.

yaw= atan2(gforce.x, gforce.z);

but I think Daid's solution is better.

I tried yaw= atan2(gforce.x, gforce.z); and got no values for yaw
also have no values for gforce.x
the code I used is as follows

WPAD_Orientation(WPAD_CHAN_0, &orient);
	struct expansion_t data;
     WPAD_Expansion(WPAD_CHAN_0, &data);
     data.nunchuk.orient_threshold = 0.5f;
      rquadnunchuklateral= atan2(data.nunchuk.gforce.x,data.nunchuk.gforce.z);

also tried

rquadnunchuklateral=data.nunchuk.gforce.x;

it seems my nunchuk is not reporting gforce data how do I make it do this

take a look here - [wiibrew.org]

probably needs init()


WPAD_Orientation(WPAD_CHAN_0, &(data.orient));//get rotation data
WPAD_GForce(WPAD_CHAN_0, &(data.gforce));//get "speed" data
WPAD_Accel(WPAD_CHAN_0, &(data.accel));//get accelerometer data
WPAD_Expansion(WPAD_CHAN_0, &(data.exp));//get expansion data



Edited 1 time(s). Last edit at 11/25/2010 01:48AM by scanff.

Thanks I am now getting all the data
is it possible to smooth the data as it still has a lot of noise

The data is raw so you'll have to do your own smoothing.

IR smoothing is done here [devkitpro.svn.sourceforge.net]


Maybe you can do something similar.

Thanks I will have a look at it