WorldViz User Forum  

Go Back   WorldViz User Forum > Precision Position Tracker (PPT)

Thread Tools Rate Thread Display Modes
Old 07-20-2011, 01:59 PM
willemsn willemsn is offline
Join Date: Jul 2011
Posts: 1
VRPN quaternion conversion from PPT from Intersense InertiaCube

In our application, we've used VRPN and our PPT computer to communicate the position of our tracked points. For orientation, we've mostly accessed our Intersense InertiaCube orientation information directly via a serial port on our Linux box. This has worked fine, and when we've done this, we pulled Euler angles off the Intersense device.

We finally re-arranged the lab space and connected the Intersense device to our PPT system. It recognized the device and we've added the post-processing Intersense module. Our tracked point is now sending out position and a quaternion over the VRPN network to our workstations.

So far so good... however, when we used VRPN's API and specifically, the q_to_euler conversion function to do a sanity check between the yaw, pitch, and roll as seen on our rendering system and that of PPT, we get different values.

Shouldn't we get the same values for yaw, pitch, and roll if these values as seen by PPT are being packaged up correctly into VRPN's quaternions?

We're puzzled by this behavior and thought we 'd ask if anyone has an idea about what is happening on the PPT side for packaging up Yaw, Pitch, and Roll of intersense devices into a VRPN quaternion.

Many thanks!

Reply With Quote

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Properly aligning the intersense with the PPT Systems Z Axis shivanangel Precision Position Tracker (PPT) 0 11-10-2009 11:35 AM
world is tilting - intersense or code problem? billjarrold Vizard 2 11-06-2009 08:03 AM
Intersense InertiaCube Vic Precision Position Tracker (PPT) 2 06-15-2009 09:36 AM
intersense with 5DT glove sjp Vizard 2 04-06-2009 07:22 AM
Problem with newer Intersense Inertiacube 2 esmith4 Vizard 3 03-18-2005 08:13 AM

All times are GMT -7. The time now is 08:00 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright 2002-2023 WorldViz LLC