Re: [osg-users] OSG and WPF Questions
Hi Martin, I replied to your message earlier, but I thought I would post my experience here for the benefits of those reading this thread down the line: What I did was create a WinForms Control that hosts the OSG window. Look for examples (theres a good one on CodeProject I think) of integrating WPF and OpenGL. OSG will be the same. This is necessary because WPF uses HWNDs only for the top-level window - everything below is DirectX. But a WinForms control has an HWND, and WPF has an interoperability feature where it can host WinForms controls. There are limitations however - principally that transparent WPF popup windows (used for messages, menus, etc) do not show up properly over the OSG window under XP on most NVIDIA graphics cards (non-Quadro cards), according to NVIDIA. One possible workaround would be to have OSG render to a texture and then blit that to a WPF canvas. I have been intending to do this - but have not gotten around to it yet. Currently I just structured my menus to avoid the overlap. I should also mention that it is useful to crank up the OSG render loop during the initialization of the control - not at construction, IIRC. There are a few other hurdles, like having to use the dispatcher to update WPF UI widgets, when the update originates from OSG - but these type of threading issues are to be expected in this type of app anyway. A lot of my daily pain comes from having to drill a piece of information down through several layers of code (abstraction layers for threading and for the managed/native transition) to get from the UI to the OSG render loop, which is again, to be expected. I have found a couple of issues with events, such as WPF not passing drag events (that originated from outside the app) down to OSG - which I dealt with by handling the events at the WinForms level, and then drilling down the mouse drag info to my OSG render loop. Best of luck, Brian -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=15651#15651 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Custom EventHandlers and Manipulator problem
Hi, I am using a combination of osg manipulators (fly, drive, etc.) with a KeySwitchManipulator. After these are set up, I have several tools which can be loaded at runtime, and each of them can register event handler callbacks for things like mouse up and mouse down. These handlers are working correctly, except the motion model manipulators furnished by osg are still getting the events, despite the fact that the handlers return true indicating the event was handled. So when you click and drag a building, for example, the view will rotate and spin in an undesirable fashion. I ran across a thread (http://forum.openscenegraph.org/viewtopic.php?t=2544highlight=return+manipulator) from back in May 2009 where Robert said: In OSG-1.x events were not passed on if handled. In OSG-2.x events are passed on to all manipulators/event handlers and it's the event handlers responsibility to decide whether they want to ignore handled events or not. This approach is more flexible and robust once you now about if (handled) trick. So what I am wondering is, what is the correct way to keep the built-in manipulators from responding to these handled events? I know about using the following code in custom maniuplators: Code: if (ea.getHandled()) return false; But what about with the built-in ones? And does the order in which the event handlers are registered affect anything? I am using OSG 2.6.1 with MS Visual Studio 2008 on Vista-64. Thank you! Cheers, Brian -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=14712#14712 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] MatrixManipulator::home(double) doesn't seem to work
Hi, I am trying to reset my viewer's position in response to an external UI event using the home(double) function on MatrixManipulator, but to no avail. The call to setHomePosition() is working correctly, as I can hit the spacebar, and it takes me to the proper location. The online page for MatrixManipulator does not say what the double parameter does, but a comment in the code says it is the current time. I tried passing in viewer-elapsedTime() and then I tried 0.0 - and neither seemed to work. On digging through the code, it appears that KeyswitchMatrixManipulator does not actually implement this function (at least in my version of OSG - 2.6.1). I then tried getting the current MatrixManipulator from it and calling home(double) directly on that - still with no effect. Am I doing something wrong? Is there a better way to set the view to a desired location and orientation? Is this a bug that's been fixed in a more recent version? Thank you! Cheers, Brian -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=13969#13969 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Outline Effect traversal crash
Hi Maciej, Thank you for the example. It seems to be a lot faster than what I was doing earlier. Before when a node was selected, I removed it from its parent, created an osgFX::Scribe effect and placed it under the parent, and then reattached my node under that. But there was a slight delay between when the node disappeared, and when it reappeared selected. Because the nodes are buildings placed on geo-specific high-resolution imagery, this had the curious effect of make the building appear to be push into the terrain temporarily, and then spring back into position with the Scribe effect applied. Thanks for the links to the post and to the cel-shading article - those helped a lot! I did have one question about the new selection method you demonstrated. It makes the building appear to be all white, since the texture is turned off. Is this correct? I tried disabling that part of the code, but now the backfaced outlines are not enough to make the object stand out. What I would really like to do is outline the object in a striking color (say bright yellow, or something) and then render the textured object with a slight cast if the same color. Is this possible in OSG? I have searched though the archives, but without a lot of success yet. Just a pointer to some techniques that might work, or to a forum thread I missed would be a great help! Thank you! Cheers, Brian -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=12792#12792 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Outline Effect traversal crash
Hi Robert, Thanks for that clarification, as my understanding of where nodes should be added and removed was exactly backwards. I did paraphrase my code extensively, because there was a lot of unrelated code - but I guess I didn't include enough. I went to create a simpler example using osgcompositeviewer as a starting point, when I noticed that it is doing exactly the same thing that I am trying to, only in the handle() function of osgaGA::GUIEventHandler, which is called during the event traversal of frame(). When you said it's best to avoid modifying the scenegraph during a traversal, did that specifically mean the Update Traversal, when NodeCallbacks are called, and that modifications in event callbacks are OK? Thank you! Cheers, Brian -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=12675#12675 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Outline Effect traversal crash
Hi, I switched my code around to where the model was being added from the main loop rather than the update traversal, and it was still crashing. On closer examination I noticed that the crashes were occurring during the render traversal, so I began to suspect the effect itself. When I replaced the effect with an instance of osgFX::Scribe, then everything worked correctly. So something was amiss in the Outline effect itself. I was using it only because I did not know about the Scribe effect, which is better for my purposes anyway. Thank you! Brian -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=12692#12692 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Outline Effect traversal crash
Hi,
I am trying to implement a mechanism by which selected objects in my scene are
highlighted. Searching the forum I found a reference to the Outline effect (an
implementation of osgFX::Effect) on Ulrich Hertlein's web site
(http://www.sandbox.de/osg/), and I have attempted to integrate it into our app
- however, most of the time, whenever the object which is outlined first comes
into view, the app crashes in osg::NodeCallback::traverse, because the
_nestedCallback member is corrupted. This is on Windows Vista-64, running OSG
2.6.1 built with Visual Studio 2008, in Debug mode. We are running OSG
multithreaded, and all my code setting up the effect is called from
osg::NodeCallback::operator() on the render thread. The general flow is as
follows:
Code:
osg::NodeCallback::operator()
{
osg::PositionAttitudeTransform* modelTransform; // local transform to
position the model in the world
osg::Node* someChild; // some model
osg::ref_ptrosgFX::Effect fxNode = new osgFX::Outline();
fxNode-addChild( someChild );
modelTransform-addChild( fxNode.get() );
}
Am I missing something obvious? If not, ideas or debugging strategies would
also be greatly appreciated!
Thank you!
Brian
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Re: [osg-users] What is everyone doing for GUIs?
Hi, We are using WPF, which is Windows-only, of course. We have a thin layer written in C++/CLI that wraps our code that uses OSG. Brian Stewart -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=12433#12433 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] SGI declares bankruptcy (UNCLASSIFIED)
So sad. I had the first Indigo that would digitize video back in '92, and later on I had an Onyx in my house for about a year. It did use a lot of electricity though... This certainly wasn't a surprise, but I will miss them. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=9683#9683 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Blue Marble Map
Hi Albert, I just did a project with the Blue Marble Next Generation data (BMNG), and I just loaded the jpg tiles and used them to texture polygons. The BMNG data set goes from -180,-90 to 180,90, and there are 5 rows by 10 columns in the base set, and each set beyond that doubles the rows and columns, making for pretty easy math. Brian On Tue, Mar 10, 2009 at 1:06 PM, Albert osgfo...@tevs.eu wrote: Hello all, I was curious if anyone out there knows a site where I can download a geo-referenced version of the blue marble map. I was looking for the preprocessed version (not yet converted to an OSGA file). Best Regards, Albert -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=8165#8165 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] WPF and OpenGL popup window problem
Hi, I have developed an application where I have an OSG window embedded in a windows application built with WPF. On certain Geforce cards there seems to be a bug where WPF popup windows (like menus) that have AllowTransparency set to true do not draw correctly over my OSG window. Basically whenever the OSG/OpenGL window updates, it overwrites all overlapping pixels, even if the popup is higher in the window manager's Z-order. I have isolated it to an issue with the OpenGL driver. It only occurs on Geforce cards, not Quadro cards (which is not surprising, since I've read the Geforce cards were optimized for DirectX). I'm not so much looking for a fix (though one would be welcome) - I'm just wondering if anyone else has encountered this. I have already filed a bug report with nvidia, and it might help if I could report that others are having issues with it too (or maybe I really am the only person out there foolish enough to try this). If anyone is interested, I can supply a small test project that uses WPF and OpenGL together to demonstrate the problem. Thanks! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=7967#7967 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] msvc90 dependencies
Hi Mattias, I have been meaning to do exactly what you have done, but have not gotten around to it. According to Microsoft, if your libraries have only plain C interfaces, and don't use STL internally, then you can get away with mixing libraries from different versions of their compiler. When I quickly looked over the third party libs for OSG they all seemed to be C (but I could have easily missed something), except for maybe the input device one, which we don't use, so we just used the VS8 third party libs while building OSG for VS9. But I have been meaning to get around to building everything for VS9, just to be safe. Are your binaries built with _SCL_SECURE=0 and _HAS_ITERATOR_DEBUGIING=0? This would only apply to C++ third party libs, but as J-S pointed out, it does cause binary incompatibilities, similar to those caused by mixing /MT and /MD binaries. We turn these two features off for performance reasons, and we recently discovered that boost 1.36.0 now hardwires them to off - so anyone linking with this version (or I assume a later version as well) of boost would need to build OSG and their own code with these two features disabled as well. On Mon, Dec 1, 2008 at 7:33 PM, Mattias Helsing [EMAIL PROTECTED] wrote: Hi all, I have seen in recent posts that people aren't aware of my set of prebuilt binaries for vc90. It is here: http://www.openscenegraph.org/projects/osg/wiki/Community/People/MattiasHelsing It has been there since early sept. A few people have requested that it be linked to from the win32 dependencies wiki page but I have refrained from poking Robert about this since I know that Mike has a plan for msvc90. Until then the link may be a good idea. cheers Mattias ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Exception invalid lock sequence thrown from OSG App
I have an application that is built against OpenSceneGraph (2.6.1). The application initializes and begins to run, but then I get the following exception attempt was made to execute an invalid lock sequence in OpenGL32.dll. When I re-run it, I sometimes get this exception, and sometimes an exception about a privileged instruction. The call stack looks like it is corrupted, so I can't really tell exactly where the exception is being thrown from. I ran the app quite a bit a couple of days ago and never saw this behavior. Since then I have added an else clause to a couple of ifs, and that is all. My app is a console application, is built with Visual Studio 2008, and it sets OpenScenGraph to SingleThreaded mode. Anybody seen this before? Any debugging tips? Thanks Brian Stewart ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
