WorldViz User Forum  

Go Back   WorldViz User Forum > Vizard

Reply
 
Thread Tools Rate Thread Display Modes
  #1  
Old 05-23-2007, 11:23 AM
TunTun TunTun is offline
Member
 
Join Date: May 2007
Posts: 16
question about yaw, pitch, roll

Hello

I have a question about the command <viewpoint>.rotate(x,y,z,angle). It's said x specifies yaw, y specifies pitch, and z specifies roll. Also viz.get(viz.HEAD_EULER) returns the same order.

my code is:
view = viz.get(viz.MAIN_VIEWPOINT)
view.rotate(1,0,0, 90)
pe = viz.get(viz.HEAD_EULER)
print 'orientation of viewpoint is at: ', pe[0], ', ', pe[1], ', ', pe[2]

It's supposed to change orientation in yaw (vertical axis), and get result (90.0, 0.0, 0.0). But my result is (0.0, 90.0, 0.0).

Then I tried other two directions:

If: view.rotate(0,1,0, 90)
then result is: (90.0, 0.0, 0.0)

If: view.rotate(0,0,1 90)
then result is: (0.0, 0.0, 90.0)

It seems the yaw and pitch values somehow switch each other. Only roll value is what I expected. Can anybody tell me what happened?

Thanks a lot.
Reply With Quote
  #2  
Old 05-23-2007, 11:30 AM
farshizzo farshizzo is offline
WorldViz Team Member
 
Join Date: Mar 2003
Posts: 2,849
Those values are correct. The command view.rotate(1,0,0, 90) will rotate the view 90 degrees along the x-axis, which represents the pitch in euler angles.
Reply With Quote
  #3  
Old 05-23-2007, 01:46 PM
Jerry Jerry is offline
Member
 
Join Date: Jun 2004
Posts: 105
That's always bothered me too. Yaw is rotation about the y axis.

If you do it this way:

view.rotate(1,0,0,90)

the Eulers come back 0,90,0

but if you do it this way:

view.rotate(90,0,0)

the Eulers are 90,0,0
Reply With Quote
Reply

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


All times are GMT -7. The time now is 01:26 AM.


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