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jebber
07-07-2004, 03:27 PM
In the code below, what do lines 4 and 5 mean? What are the significance of the numbers and the positions of those numbers? Why is it (4.002) and why (5,",5)? How/why do they affect the last line (12), viz.eyesight(1.7)?

1 if viz.get(viz.TRACKER):
4 pos.command(4.002)
5 pos.command(5,'',5)
6 viz.tracker()
7 v.reset()
8 tracking = 1
9 else:
10 tracking = 0
11
12 viz.eyeheight(1.7)

Jeb

farshizzo
07-07-2004, 03:55 PM
Hi Jeb,

Line 4 is telling the ppt to scale the incoming position values by 2
Line 5 is telling the ppt to average the position values over the last 5 samples.

Line 4 will affect line 12 because the y value of the ppt will be scaled by a factor of 2, so the height of the viewer will be taller. Here's a list of all the available ppt commands. Let me know if you have any more questions.

PPT Commands

3 - Set the scale factor for each axis.
ppt.command(3,'',2,1,2) #Scale x and z axis by 2, but leave y axis alone

4 - Set the scale factor for all axis.
ppt.command(4.002) #Scale position value by 2

5 - Average position value by given number of samples
ppt.command(5,'',3) #Average position over previous 3 samples

6 - Set the reset mask for each axis
ppt.command(6,'',0,1,0) #Reseting ppt will only reset the y axis

7 - Manually set the offset for the ppt
ppt.command(7,'',2,0,3) #Set the virtual center of the ppt at (2,0,3)