Hi Neil,
I can't follow your email, so can't comment specifically. I can say
that I did a refactor of osgManipulator a couple of months back that
is now available in the 2.9.6 dev release, and svn/trunk. This
refactor makes it easier to use so I would recommend using this.
I'm not the original author of osgManipulator so prior to my refactor
the code base was a bit of uknown, but since the refactor it is a bit
more familiar, which means I have a better chance of understanding
issues/code so moving this the latest OSG would help with support as
well.
Robert.
On Fri, Dec 11, 2009 at 12:34 AM, Neil Clayton <n...@shinywhitebox.com> wrote:
> Hi,
>
> I'm fairly new to OSG, and am wondering if my understanding of Draggers is
> correct.
>
> I've a scene with a graph like so: ClearNode -> Black box -> Group ( { Pat
> -> Geode}, { Dragger} ). The real graph is a touch more complex, but it's
> pretty simple. A few geometry objects only at the moment. I'm missing a
> matrix transform for the dragger in the above - but it gives the idea.
>
> I'm manipulating planes of data. So while it's in perspective, everything
> sits on the y=0 plane.
> When I click, sometimes the dragger is selected, sometimes not.
>
> Printing out the objects intersected within Dragger::handle, it seems like
> it's either random or based (maybe?) on z order. If the nodepath containing
> the TranslatePaneDragger happens to be the first it works. Otherwise it
> doesn't.
>
> Dragger seems to assume that the first intersection will always contain the
> dragger node. Which I'm not finding to be the case. I modified dragger so
> that it examines all intersections (and remembers the correct iterator,
> passing that to ::handle() for ::DRAG and ::RELEASE events), and now it works
> fine.
>
> Have I misunderstood how draggers work though? I'm worried that I've
> modified code because of my own lack of understanding of OSG.
>
> Cheers,
> Neil
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=21292#21292
>
>
>
>
>
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