[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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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=42845#42845

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[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

------------------
Read this topic online here:

http://forum.openscenegraph.org/viewtopic.php?p=42847#42847

[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

------------------
Read this topic online here:

http://forum.openscenegraph.org/viewtopic.php?p=42888#42888