<div dir="ltr"><div>Ah, right, now I see it!</div><div><br></div><div>Thank you both! It's working now.<br></div><br>On Thursday, May 21, 2020 at 5:48:32 AM UTC-3, OpenSceneGraph Users wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: 0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">
<div>
Hi Rodrigo,<br>
<br>
from my understanding the number of Billboards, each an individual
instance, is not<br>
the problem in OSG. The cull traversal has to handle it independant
of being an individual <br>
instance or being a single instance, reused after a transform. So
you can create them and give names to them.<br>
The important point is the resource of the icons. You should load
them externally and assign them to the billboards<br>
by using their pointers. This will ensure OSG will keep only one
instance of each kind of icon.<br>
<br>
- Werner -<br>
<br>
<div>Am 21.05.2020 um 10:11 schrieb
OpenSceneGraph Users:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Thank you for your reply, Robert, but one of us is not
understanding the other.</div>
<div><br>
</div>
<div>"if you are reuse the same subgraph the node above the
reused part like the osg::Billboard is what is unique so put
your unique name on that"</div>
<div><br>
</div>
<div>Actually, I have only one osg::Billboard
(geodeHidreletrica) for hundreds of hydroelectric dam icons
(thus hundreds of different names). Should I have hundreds of
billboards? Hundreds of quads/geometries? I don't quite get
how addDrawable copies the icons to different places using
(what seems to be) a single osg::Geometry. In which object
exactly should I put each different name?<br>
</div>
<div><br>
</div>
<div>Thanks again,</div>
<div>Rodrigo.<br>
</div>
<br>
On Thursday, May 21, 2020 at 3:30:32 AM UTC-3, OpenSceneGraph
Users wrote:
<blockquote class="gmail_quote" style="margin:0;margin-left:0.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>If the approach is producing good enough performance
then I'd stick with it. It's a long way from the most
optimal way you could do this type of task, but all the
alternatives are more complicated and require deeper
understanding of OSG/OpenGL/shaders. I'll not attempt to
make suggestions as you should only ever make solutions
more complicated if you really have to.</div>
<div><br>
</div>
<div>As for giving the objects different names, all objects
in the scene graph support setName/getName, if you are
reuse the same subgraph the node above the reused part
like the osg::Billboard is what is unique so put your
unique name on that nodes. The intersection traversal
will return the whole NodePath to the intersected drawable
so you just need to check the NodePath to find all the
associated names.</div>
<div><br>
</div>
<div>Robert.<br>
</div>
</div>
</blockquote>
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