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Old 03-14-2010, 07:26 PM
hahaho hahaho is offline
Join Date: Mar 2010
Posts: 6
sensors confused

I want to use the sensor of the three.
these sensors want to fixed number[A,B,C], (no value[x,y,z])

for example)

sensorA(fixed number) = (10,10,10) <-x,y,z (receive(change) value)
sensorB(fixed number) = (20,20,20) <-x,y,z (receive(change) value)
sensorC(fixed number) = (30,30,30) <-x,y,z (receive(change) value)

so, i am used this code.

vrpn = viz.add('vrpn7.dle')
sensorA = vrpn.addTracker('PPT0@',0)
sensorB = vrpn.addTracker('PPT0@',1)
sensorC = vrpn.addTracker('PPT0@',2)

def update(): 
      position1 = sensorA.getPosition()
      position2 = sensorB.getPosition()
      position3 = sensorC.getPosition()
      a =  position1[0]
      a1 = position1[1]
      a2 = position1[2]
      b = position2[0]
      b1 = position2[1]
      b2 = position2[2]  

      c = position3[0] 
      c1 = position3[1]
      c2 = position3[2]
      A = [a,0,a2]
      B = [b,0,b2]
      C = [c,0,c2]
      # vector
      v1 = vizmat.VectorToPoint(A,B)
      v2 = vizmat.VectorToPoint(A,C)
      v = vizmat.AngleBetweenVector(v1,v2)
      UpperArm.setEuler([0, -30, -80]) 

      print v
but , the sensor's number is frequently change.

for example)

sensorB = (10,10,10)
sensorA = (20,20,20)
sensorC = (30,30,30)
sensorC = (10,10,10)
sensorA = (20,20,20)
sensorB = (30,30,30)

How do i receive the fixed sensor's number?
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Old 03-15-2010, 07:42 AM
mspusch mspusch is offline
WorldViz Team Member
Join Date: Feb 2003
Posts: 223
If you are using marker-ID markers, you should contact about this, if there is marker swapping.

if you use non-marker-ID markers, then you should have a look here for algorithsm that help to distinguish which marker is which for a 2-hands / head setup:
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Old 03-15-2010, 04:17 PM
Jeff Jeff is offline
WorldViz Team Member
Join Date: Aug 2008
Posts: 2,471
If you are using non-marker ID markers another way of ditinguishing head and hands is to use the Mocap post-process plug-in within PPT Studio.
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