WorldViz User Forum - Vizlink problem

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- - Vizlink problem (https://forum.worldviz.com/showthread.php?t=768)

Below is a sample piece of code (numbered lines for clarity) that I play around with in order to make sure I understand the linking process.
1: import viz
2: viz.go()
3: block = viz.add('box.wrl')
4: block.translate(0,1.8,3)
5: marker = viz.add('marker.wrl')
6: marker.scale(0.1,0.1,0.1)
7: marker.translate(0,1.8,0)
8: link = viz.link(marker,block)
9: print "marker pos is: ", marker.getPosition()
10: print "block pos is: ", block.getPosition()
11: marker.translate(0,11,24)
12: print "marker pos is, after translation: ", marker.getPosition()
13: print "block pos is, after translation: ", block.getPosition()
14: link.remove()
15: marker.translate(0,1.8,41)
16: print "marker pos is, after remove: ", marker.getPosition()
17: print "block pos is, after remove: ", block.getPosition()

If I run this program, I notice that the block position (line 13), (the node being linked to the marker on line 8) is is not updated after the marker is translated (line11). I do not understand why. Shouldn't the block position be applied the translation too?

Furthermore, If I understand correctly, the remove() function is like an unlink command. Is that correct?

Thanks for your reply
Patrick

The link object only updates the position of the destination objects every update-cycle/frame so you have wait a frame before the block takes on a new position.

Code:

import viz

viz.go()

block = viz.add('box.wrl')

block.translate(0,1.8,3)

marker = viz.add('marker.wrl')

marker.scale(0.1,0.1,0.1)

marker.translate(0,1.8,0)

link = viz.link(marker,block)

print "marker pos is: ", marker.getPosition()

print "block pos is: ", block.getPosition()

marker.translate(0,11,24)



counter = 0

def onTimer(num):

        global counter

        if counter == 0:

                print "marker pos is, after translation: ", marker.getPosition()

                print "block pos is, after translation: ", block.getPosition()

                link.remove()

        if counter == 1:

                #marker.translate(0,1.8,41)

                print "marker pos is, after remove: ", marker.getPosition()

                print "block pos is, after remove: ", block.getPosition()

        counter += 1



viz.callback( viz.TIMER_EVENT, onTimer )

viz.starttimer( 0, .01667, viz.FOREVER )

Thanks, Paul

Maybe it should be added in the help file, unless I missed it there.

Thanks for the help anyways
Patrick