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  #1  
Old 09-21-2015, 01:43 AM
hzhao hzhao is offline
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Join Date: Sep 2012
Posts: 16
Question how to reduce motion sickness with Oculus rift+logitech driving force

Hi,

I am setting up my Oculus rift DK2 with Logitech driving force GT. To use these two, I combined the two demo codes for Oculus and joy stick control (attached below). It works. But I don't feel well when I use this setup because of the very strong motion sickness. I used the position tracking from Oculus. Could anyone give me some help to improve it? reduce the motion sickness? Thanks.

the code I used:

hmd = oculus.Rift()

# Get list of joystick device information
dinput = viz.add('DirectInput.dle')
devices = dinput.getJoystickDevices()
joy = dinput.addJoystick(devices[selected])
joy.setDeadZone(0.05)


# Check if HMD supports position tracking
supportPositionTracking = hmd.getSensor().getSrcMask() & viz.LINK_POS
if supportPositionTracking:

# Add camera bounds model
camera_bounds = hmd.addCameraBounds()
camera_bounds.visible(False)

# Change color of bounds to reflect whether position was tracked
def CheckPositionTracked():
if hmd.getSensor().getStatus() & oculus.STATUS_POSITION_TRACKED:
camera_bounds.color(viz.GREEN)
else:
camera_bounds.color(viz.RED)
vizact.onupdate(0, CheckPositionTracked)

# Setup navigation node and link to main view
navigationNode = viz.addGroup()
HMDviewLink = viz.link(navigationNode, viz.MainView)
HMDviewLink.preMultLinkable(hmd.getSensor())

# Apply user profile eye height to view
profile = hmd.getProfile()
if profile:
HMDviewLink.setOffset([0,profile.eyeHeight,0])
else:
HMDviewLink.setOffset([0,1.8,0])


########################### joystick turn and move speed###############
joy_MOVE_SPEED = 2.0
joy_TURN_SPEED = 60.0
################################################## #############

def UpdateView():

########for joy control############
e = viz.elapsed()
x,y,z = joy.getPosition()

navigationNode.setEuler([x * joy_TURN_SPEED * e, 0, 0], viz.REL_LOCAL)
navigationNode.setPosition([0, 0, (y+1) * joy_MOVE_SPEED * viz.getFrameElapsed()], viz.REL_LOCAL)
#################################



vizact.ontimer(0,UpdateView)
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  #2  
Old 09-21-2015, 04:11 PM
Jeff Jeff is offline
WorldViz Team Member
 
Join Date: Aug 2008
Posts: 2,457
I would suggest looking online for best practices to reduce motion sickness in VR. Make sure you're simulation is running at 75 fps and use Direct HMD mode to reduce latency. Latency and virtual movements that don't match physical movements can cause motion sickness. You might see if gradual acceleration rather than instantaneous changes to the car speed helps. Also, see if adding a dashboard as a fixed reference in the scene helps.
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  #3  
Old 09-23-2015, 06:34 AM
hzhao hzhao is offline
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Join Date: Sep 2012
Posts: 16
Thanks, Jeff,

I tried adding a dashboard, but it helped little. I'll try your other suggestions. Thanks again.
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controller, driving force, motion sickness, oculus rift

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