Hi All,
I've tried several things, without achieving any improvement. The modified
geode always disappear from the rendered scene, but if I load it with
osgViewer.exe, it's properly rendered.
I'm sure I miss something related to the viewer frame loop and I have 2
questions:
1. Do we always need
Hi JP,
it's impossible to show exactly my code, but what I basically do with the
geode is:
1. Remove all drawables:
geode-removeDrawables((unsigned int)0, geode-getNumDrawables());
2. Create new ones:
osg::ref_ptr osg::Geometry geom;
geom = createGeom(parameters);
..
3. Add them to the geode:
Hi,
fausto wrote:
Hi JP,
it's impossible to show exactly my code, but what I basically do with
the geode is:
1. Remove all drawables:
geode-removeDrawables((unsigned int)0, geode-getNumDrawables());
2. Create new ones:
osg::ref_ptr osg::Geometry geom;
geom = createGeom(parameters);
..
3.
Hi JP,
Does createGeom reuse any old osg data (arrays)?
No.
where in your frame loop do you do this?
Well, now that you tell me, I think the problem is here. I have no loop. I
thought that the rendering refresh was done automatically when a node in the
scene was modified.
Sorry for my
No, may be the problem is not there yet, unless I miss something.
Never mind the following, I've been able to make it appear.
I've tried to call viewer-frame() when I know that the scene has been
modified, but nothing appears now in the viewer.
However the problem is still the same, even when
Hi Fausto,
Dynamically modifying the scene graph shouldn't be that hard.
Removing drawables and adding news ones should perfect safe and
shouldn't require and extra steps from you, no need to dirty bounding
volumes or display lists, it should all just work.
As to why your new drawables aren't
Hi Fausto and Robert,
If the simple modification is due to some specific user event (button
press, file dialog, etc.), I might recommend refactoring the code to
add/remove nodes instead of drawables. It sounds like you have no
trouble initially getting the geometry into the scene; it is the
Thank you both for your inputs.
To Robert:
Try writing the subgraph they are in out to a file then load this file
into osgviewer to see if can view them.
Yes, as I mentioned the new scene data is OK, I can see it while debugging
and after saving-loading it with osgViewer.exe all new drawables
Fausto,
My project uses Qt widgets as well, so if this is the problem, I'd be
interested in the solution so that I can proof read our code.
Fortunately/unfortunately, it appears to work for me.
As to the nodes and drawables, all I can say is that there are nodes,
and then, there are nodes.
In
Hi,
can you give more detail on what you are adding/removing? Do you use the
same vertex lists, but with new drawables. Do you change vertices, but
keep the drawables? To get more help you'd probably need to make a very
small example that shows the problem...
jp
fausto wrote:
Thank you
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