Re: [osg-users] Understanding how osg::switch node works?

[Sanat Talmaki]

Hi dewey,

The problem was that I had more than a single switch node and only one 
attribute was getting  turned on/off which I only noticed after zooming into my 
scene.

I corrected it by writing a visitor accumulating all the switches and turning 
each of them on/off.

Thanks,
Sanat

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[osg-users] Understanding how osg::switch node works?

[Sanat Talmaki]

Hi,

I am trying to use an osg::Switch node in my scene to toggle on/off certain 
sub-graphs. 

the way I have my subgraph set up is:

I have a geode (textGeode) which is placed under a switch node and the switch 
is then place below an LOD node. 


Code:

annotationsSwitch-addChild(textGeode, true);
  annotationsLod-addChild(annotationsSwitch, 0, 700);




When I try using the following to turn the switch On/Off, my geometry is still 
visible. 

Code:
setChildValue(
 getSearchedNode(QString(textGeode)), false);



OR


Code:
setAllChildrenOff ()



I was under the impression that turning the geode off would ensure that the 
geometry placed below the geode would also be off. 

Do I need to use node masks to achieve this?

Thanks!

Sincerely,
Sanat.

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Re: [osg-users] Understanding how osg::switch node works?

[Eric Heft]

Hi Nerazzuri?, 

I suspect that your code to find the switch node is not working. 

As a quick and dirty example try saving a pointer to the switch node as a 
global and in your main loop try turning it on and off.


Code:


int n = 0
while( !viewer.done() )
{
annotationsSwitch-setValue(0, (++n) % 2 );
viewer.frame();
}





Assuming you only have the one child your text should flash on/off. 

That would help you narrow down if the problem is with setting the switch value 
or if the problem is in getSearchedNode.

Cheers!
Eric

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