Vive: trouble setting node as a child of the head

[performlabrit]

Thanks jeff! The following code worked...

	import vizshape
	r = vizshape.addSphere(0.05, color = viz.RED)
	r.setReferenceFrame(viz.RF_VIEW)
	r.setPosition([0,0,1])

[performlabrit]

Sadly, my attempts to place a sphere along the gaze vector are still not behaving as expected. None of the parenting functions work, and viz.setRefrenceFrame is producing unpredictable results.

Here are two new attempts dropped into my vizconfig main function that uses the standard VIVE template. Neither work. Any advice from the peanut gallery?

############# Attempt 1, what I thought would work...

	import vizshape
	
	IPD = viz.MainWindow.getIPD()

# It does seem that the right eye base is in the correct position and updates with head position
	rightEyeBase = vizshape.addSphere(0.05, color = viz.BLUE)
	rightEyeBase.setReferenceFrame(viz.RF_VIEW)
	rightEyeBase.setPosition([IPD/2,0,0])
	rightEyeBase.alpha(0.00)

link = viz.link(viz.MainView,rightEyeBase,viz.PRIORITY_SCENEGRAPH) # I tried with and without the link here
	link.setMask(viz.LINK_ORI)

	rightGazePoint = vizshape.addSphere(0.05, color = viz.YELLOW)
rightGazePoint.setReferenceFrame(rightEyeBase)
	
	smi = viz.add('smi_vive.dle')
	eyeTracker = smi.addEyeTracker()

	def updateGazeNode(vecLength = 3.0):
		
rDir = eyeTracker.getRightGazeDirection() 
rightGazePoint.setPosition(rDir[0]*vecLength,rDir[1]*vecLength,rDir[2]*vecLength)   
		
	vizact.onupdate(viz.PRIORITY_LAST_UPDATE,updateGazeNode)

###########



############# Attempt 2, based on the example provided by Worldviz (smiViveExample.py)
## Note that this doesn't accoutn for the right eye offset.

	import vizshape
	
	IPD = viz.MainWindow.getIPD()
	rightEyeBase = vizshape.addSphere(0.05, color = viz.BLUE)
	rightEyeBase.setReferenceFrame(viz.RF_VIEW)
	rightEyeBase.setPosition([IPD/2,0,0])
	rightEyeBase.alpha(0.00)

	rightGazePoint = vizshape.addSphere(0.05, color = viz.YELLOW)
	#rightGazePoint.setReferenceFrame(rightEyeBase)
	
	
	smi = viz.add('smi_vive.dle')
	eyeTracker = smi.addEyeTracker()

	def updateGazeNode(vecLength = 3.0):
		
		gazeMat = eyeTracker.getMatrix()
		gazeMat.postMult(viz.MainView.getMatrix())
		rightGazePoint.setMatrix(gazeMat)
		
	vizact.onupdate(viz.PRIORITY_LAST_UPDATE,updateGazeNode)
###########