WorldViz User Forum  

Go Back   WorldViz User Forum > Vizard

 
 
Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
  #1  
Old 10-27-2009, 12:36 PM
GiudiceLab GiudiceLab is offline
Member
 
Join Date: May 2009
Location: Orono, ME
Posts: 49
Trouble with listener updating position?

We have a script that toggles an object to play a sound whenever the viewpoint orientation is within a certain threshold (so when the person is looking at the object). It works very well until the viewpoint translates--If the person moves, then turns in place and looks at an object, the sound will trigger, but it will be spatialized as though the person was still in their original position. The stranger part is that if they move at all from their current position, the sound jumps to the correct location.

We are using keyboard commands to emulate orientation and position tracking. I have code snippets that cover the basics of this issue, but I am not sure if I included everything pertinent.
Code:
(in a separate module, called onupdate)

if viz.iskeydown(viz.KEY_LEFT):
   VIEW.rotate(0,1,0,-TURN_SPEED*viz.elapsed(),viz.HEAD_ORI,viz.REL_PARENT)
elif viz.iskeydown(viz.KEY_RIGHT):
   VIEW.rotate(0,1,0,TURN_SPEED*viz.elapsed(),viz.HEAD_ORI,viz.REL_PARENT)

if viz.iskeydown('w'):
   VIEW.translate(0,0,MOVE_SPEED*viz.elapsed(),viz.REL_LOCAL)
elif viz.iskeydown('s'):
   VIEW.translate(0,0,-MOVE_SPEED*viz.elapsed(),viz.REL_LOCAL)
elif viz.iskeydown('a'):
   VIEW.translate(-MOVE_SPEED*viz.elapsed(),0,0,viz.REL_LOCAL)
elif viz.iskeydown('d'):
   VIEW.translate(MOVE_SPEED*viz.elapsed(),0,0,viz.REL_LOCAL)

(in the experimental module, called onupdate)
def monitorOri(e):
	global objplay
	# the purpose of this function is to determine whether the viewpoint
	# is facing an object (within a certain threshold)
	# then have that object play its tone until the viewpoint moves outside
	# the threshold
	view_yaw = view.getEuler()
	view_pos = view.getPosition()

	for item in range(len(objects)):

		object_pos = objects[item].getPosition()
		target_angle = utilities.genTargetAngle(object_pos,view_pos)
		relative_angle = abs(vizmat.AngleDiff(target_angle,view_yaw[0]))
		
		if  (relative_angle <= threshold_angle) and objplay[item] == False:
			toggleTone(item,viz.ON)
			objplay[item] = True
		elif (relative_angle > threshold_angle) and objplay[item] == True:
			toggleTone(item,viz.OFF)
			objplay[item] = False
		else:
			pass
I use vizact onupdate to call the keystroke monitoring in the module, but use viz.callback(viz.UPDATE_EVENT, monitorOri) for monitoring the orientation with respect to each object. Maybe that is causing some sort of interference?

Any suggestions are appreciated, thanks.
__________________
Virtual Environments and Multimodal Interaction (VEMI) Lab

This time, it should work...
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
updating positional data Saz Vizard 8 01-12-2009 05:23 AM
writing joystick position to a data file Saz Vizard 3 12-17-2008 06:18 AM
default start position erchrastil Vizard 2 06-23-2008 09:15 AM
position of html-file on screen active_world Vizard 1 05-16-2008 08:24 PM
Avatar always returns in initial position pattie Vizard 2 08-31-2006 09:15 PM


All times are GMT -7. The time now is 06:12 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright 2002-2018 WorldViz LLC