Hi Robert,
Unfortuenetly I can't use a switch node. But you are telling me to do
this outside update. Can you please be a bit more precise where its safe
to remove
stuff. My main loop looks like this.
while(renderSurface->isRealized())
{
...
// do the update traversal the scene graph - such as updating animations
sceneView->update();
/**************************/
// do the cull traversal, collect all objects in the view
frustum into a sorted set of rendering bins
sceneView->cull();
// draw the rendering bins.
sceneView->draw();
// Swap Buffers
renderSurface->swapBuffers();
...
}
I really appreciate your support
Martin
Robert Osfield schrieb:
Hi Martin,
Adding and removing nodes/drawables during any traversal can
invalidate iterators held by calling functions so its recommend, its
best to do this outside an update callback.
W.r.t adding/removing nodes, perhaps you can just switch nodes on/off
using Node masks or a Switch node.
Robert.
On 5/21/07, Martin Weier <[EMAIL PROTECTED]> wrote:
Since I am new to OSG I need some help for my program and some hints on
where to start. The application needs to be able to add and remove
geodes from the scenegraph dynamically each frame. For this I want to
provide a queue of textures and primitives. that is update each frame
based on the current camera-/view-frustrum position. To do so the queue
will be entirely removed and than refilled. Than all old geodes should
be remove and the new ones should be added. In my first version I tried
creating a group node and attached a update callback to it. During the
callback step I tried to remove all nodes from the scenegraph but this
call causes the program to crash. Since I am assuming that I can remove
all elements of this group node during update and add new ones, I think
that this crash is based on some pointer-/memory issues in my code. The
Debugger outputs free(): invalid pointer. Even though everything seems
to work fine when I remove everything expect the first.
However I am not sure if this is an efficient and the right way to do
this. So a basic description, websites, example source code or a short
statement on how to to all of the above would be very helpful
I would really appreciate some help..
Martin
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