Re: [osg-users] Implementing clone() on class derived from osg::Geometry and osg::MatrixTransform
Hi, clone method is virtual and should return osg::Object*. you can dynamic cast (or even static cast if you are sure) to PiGeometry*. How can I force the program to call PiFaceGeometry::clone() if this is only a child of object, on which I called clone()? I am sorry If this question is silly, I am not a good C++ programmer and I hate C++ Learn something about virtual functions and polymorphism. Virtual functions does the magic for you and calls appropriate functions, if it's called from parent class. About DEEP and SHALLOW copy: shalow copy makes memberwise clone, so every variable in original object copies to new one. Only problem there is pointer, new object have same value and points to same objects. For example with shalow copy MatrixTransform, new one will have shared children with original. But deep copy (there are several types - deep copy all, deep copy children etc.) copies them too. What this does mean for your: you can simply call osg::Geometry::clone() and then do your job: copy variables edges and surfType, according to copyop (share array in shalow copy). Cheers, Filip -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44332#44332 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Updated to OSG 3.0.0 - asGroup() returning zero.
Shawn Kennedy writes: Hi, We use OSG for one of our products, and I recently upgraded it from 2.6.0 to 3.0.0. We are now running into a problem where a Node-asGroup call which once returned non-zero is now returning zero. I'm having difficulty debugging the issue and I'm wondering if anyone can shed some light on why this may be happening. Little more detail: I have a Switch, which I add two children (Nodes) to using readNodeFile. I then try to add a child to one of those children using Node-asGroup-addChild, but asGroup is returning zero. Hi Shawn, could it be that the plugin you are using for loading your data has changed a little its behaviour and now it creates a slightly different graph? You can check this by loading the data in OSG and then exporting it to a format you can easily read. If the files are small, .osg will do. Otherwise, you can use osgconvert to do convert it to .dot file and then process it with the `dot' program in the Graphviz suite (http://www.graphviz.org/) in order to have a diagram for you to peruse. Once you solve this, you can go into more robust ways of locating elements in the graph. Usually the NodeVisitor pattern can locate specific nodes in it even when the graph suffered changes. -- Alberto ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Texture image memory leak issue
Hi, if you check your program on memory leaks (for example with visual leak detector) and don't find any leaks, it's probably fine. The problem is in memory management. There are many things that can cause increasing memory: 1) Creating any type of object or buffer on GPU is slow operation, so osg recyclates them. 2) Acquiring memory from OS is slow operation. c++ library is usually very hungry and call of delete doesn't have to return memory to OS. 3) fragmentation - you can only get whole memory pages. If you allocate something persistent in page, you cannot return it and this is something you can't solve without custom heap only for your 3D texture. 4) when you do huge allocation request, it's very likely that you can do it again, so OS or C++ library can optimalize next request. Cheers, Filip -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44334#44334 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Building
On Dec 10, 2011, at 23:01 PM, Michael W. Hall wrote: I have taken the OSGViewerQT example program and have tried to break it into a nice example for myself. I did something similar and put it here: https://github.com/kintel/QOsgWidget Since it's a Qt app, it uses qmake, but apart from that I assume it's similar to yours. Feel free to post links to code and error messages. Anything which is self-contained enough to just cmake . make is easy to give a quick spin. -Marius ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG and OpenGL rendering does not coincide
Hi IIRC osg by default tweaks projection matrix depending on window aspect ratio, you can set desired behavior with camera-setProjectionResizePolicy(...) Also you can check if viewport is actually same (there can be some difference because of window decoration or something) 01.12.2011, 23:33, Juan Herrera juan...@gmail.com: Hi, I'm reframing my AR question like this: Given same projection matrices and model view matrices in OpenGL and OSG, my rendering results do not coincide exactly. The OSG ones are slightly displaced, but the on-screen rotation coincide. There is no skewness in either. I think the OpenGL results are the correct ones. Where are the places this error could be? My windows size coincide, so I think the viewport is fine. (640x480). Thank you! Cheers, Juan PS: Note to moderator: replies to my posts are not being approved. See http://forum.openscenegraph.org/viewtopic.php?t=9485 . -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44172#44172 ___ 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
Re: [osg-users] (no subject)
Hi, Short answer: there are no simple way, You should get all drawables, grab all primitivesets and set instance count for them, write shaders that make use of instanceID to calculate vertex position. also with instanced drawing you should disable display lists, so for performance reasons make sure that your drawables have low primitivesets count (single primitiveset is good goal), i'd recommend to use osg optimizer with INDEX_MESH | VERTEX_PRETRANSFORM | VERTEX_POSSTRANSFORM on models you gonna draw instanced. 03.12.2011, 07:03, michael.a.bo...@l-3com.com: Hi Everyone, I'm trying to implement a fairly dense forested area and simply adding in a bunch of osg::MatrixTransform nodes predictably causes the cull to crash. I could try reorganizing the scene around an oct-tree as was suggested by a previous discussion on this topic, but for draw performance reasons, since each tree is the same model, I would like to use the new draw instanced arb. I see that osgdrawinstanced has been referenced in many similar threads, but osgdrawinstanced creates its geometry on the fly, and in doing so can quite easily use the command syntax for instancing. I am trying to apply the technique to a loaded model and there is no obvious easy method. My question is this, if I load a file using osgDB::readNodeFile(somefile.osg); How would I set it up for instanced drawing? My guess is that I would need to write a node-visitor that collects all of the geometry - drawables and sets them up to use the instanced call overload instead of the default. I have tried doing this, but my implementation has gotten pretty complex, and I want to make sure there isn't a more simple way I have overlooked. Thank you very much for your time. Michael A Bosse' ___ 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
Re: [osg-users] User clip planes and shaders
Hi If you need to get same result as opengl FFP, you should add following line in your vertex shader: gl_ClipVertex = gl_ModelViewMatrix * gl_Vertex; IIRC you need #version 120 to use this. Then all clip planes enabled via glEnable would work with shaders 07.12.2011, 22:36, Dave Jones dave_ita...@hotmail.com: Hi, I have some code that uses osg::ClipPlane to clip a hierarchy of meshes. All I do is create some plane equations relative to the root node's transform and set the planes as attributes that affect the entire tree. This works pretty well. When I look at the output in gDEBugger, I can see that the clip equations are invoked after glLoadMatrix is called on the root transform. glEnable is called on the clip planes before any of the geometry in the hierarchy is drawn. Currently, I need to port this functionality to a vertex shader for a project. Clipping in a shader is pretty straightforward, but I'm getting a little tripped up on what transformation space the clip planes should be in and how to transfer that to the vertex shader. According to the glClipPlane docs, the plane equations are transformed to view space. In my shader, I'm passing the plane equations in as uniforms. For this to work on all vertices, I need to ensure that the clip plane equations have been transformed by the inverse transpose of the model view matrix. The only way that I can think of doing that is creating a uniform update callback which always updates the plane equations based on the camera's current model view matrix. This seems a little clunky to me, but I wasn't sure how else to do it. Is there a simpler way that I'm overlooking? This fixed function pipeline model was convenient since it did a lot of this work for me, but it seems like I have to do on my own if I go the programmable pipeline route. Is this a correct assessment? Thanks! And sorry if this is a bit long-winded. -Dave -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44278#44278 ___ 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] Creating flare or shining star with osg
Hi all; After several tries to post this mail to the group, i dont take it long: I am developing a flight simulation. For some reason i have to create a chaff flare just like an F-16 throws. It should be too bright but doesnt has to lighten another objects in the scene. Smoke trail animation path etc. and other effects are easy to do but the flaring part that i just dont have any idea. How could i do this? thanks by now... -- Saygılarımla *Tolga Yılmaz* *Yazılım Geliştirici* ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] window position and size
you caj also use the environment variable OSG_WINDOW, e.g.: set OSG_WINDOW = 40 40 640 480 Note: space delimited. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44341#44341 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Texture image memory leak issue
Thanks for your input. I've upgraded from OSG 2.9.8 to 3.0.1 and the issue seems to be gone... -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Filip Arlet Sent: December-12-11 3:56 AM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] Texture image memory leak issue Hi, if you check your program on memory leaks (for example with visual leak detector) and don't find any leaks, it's probably fine. The problem is in memory management. There are many things that can cause increasing memory: 1) Creating any type of object or buffer on GPU is slow operation, so osg recyclates them. 2) Acquiring memory from OS is slow operation. c++ library is usually very hungry and call of delete doesn't have to return memory to OS. 3) fragmentation - you can only get whole memory pages. If you allocate something persistent in page, you cannot return it and this is something you can't solve without custom heap only for your 3D texture. 4) when you do huge allocation request, it's very likely that you can do it again, so OS or C++ library can optimalize next request. Cheers, Filip -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44334#44334 ___ 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
Re: [osg-users] [vpb] Placing an object on a UTM file generated with osgdem
Object rotation is the last piece of this puzzle. When on object is placed on a geocentric terrain using the methods outlined in this thread, the object always appears to be oriented correctly upwards with respect to the center of the earth. However I'm not sure how it is being oriented with respect to its rotation. Does anyone have any insight into this? For example if I know that my object's internal coordinate system specifies that positive x is north and positive y is west and I place that object on an arbitrary WGS84, geocentric terrain, how will I know how to rotate the object to line up the north orientation? -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44344#44344 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] attachMoveCallback memory leak?
Hi All, testing my code I realized the following code generates memory leaks. Code: osgWidget::Canvas w(test); w.attachMoveCallback(); BOOST_CHECK_EQUAL(true, false); If I remove the attachMoveCallback() line I don't have leaks. Lookig at OSG code it seems the callback object is insert into a: Code: typedef std::list osg::observer_ptr Callback CallbackList; So, can you explain me the leak please? Moreover I can't find a way to clean the _callbacks list. Is there any? Should I do it before che Canvas object goes out of scope? Regards, Gianni -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44345#44345 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Setting modelview matrix withviewer.getCamera()-setViewMatrix(modelViewMatrix) not working
Jaun, A couple of suggestions here... 1) look at the source code for setViewMatrixAsLookAt(...) to understand what it is doing with the input to create the view matrix. It calls a method makeLookAt(...) which creates an orthonormal basis in the rotation portion of the matrix from the eye,center,up input and then pre multiplies the result with the eye. 2) set the view matrix with setViewMatrixAsLookAt(...) and then get the resultant view matrix back out. Compare the returned result with your view matrix that you're passing into setViewMatrix(...) and see what is different. -Shayne -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Juan Herrera Sent: Monday, November 28, 2011 11:07 PM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] Setting modelview matrix withviewer.getCamera()-setViewMatrix(modelViewMatrix) not working I might add that viewer.getCamera()-setViewMatrixAsLookAt(eye, center, up) does work. Why is this different? Cheers, Juan Herrera -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44086#44086 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Bugs on Mac OS X (Lion)
Hello everyone, I've found three bugs while using OpenSceenGraph while running on Mac OS X Lion (10.7.2). I'm posting them all in this message. Hopefully this is ok. 1 - osgViewer::Viewer Setting up a viewer without calling 'setUpViewOnSingleScreen()' will display the current scene on all available screen. As far as I understand this is not a bug but a feature :). But doing so OpenSceenGraph does not respect the arrangement of the displays. I didn't test a lot (and only with two displays), but it seems that the main screen is always assumed to be the left one. 2 - osgGA::GUIEventAdapter::ScrollingMotion I'm trying to write my own camera manipulator. Overwriting handleMouseWheel of the class StandardManipulator did not work out so well. The problem is that I'm only getting 'SCROLL_2D' events. I found post about this earlier today saying it has been fixed (sorry lost the link). 3 - osgGA::GUIActionAdapter requestWarpPointer() I'm trying to keep the mouse cursor always in the middle of the screen which works as expected. But after doing so the input freezes for about quarter a second. I found this forum entry: http://forum.openscenegraph.org/viewtopic.php?t=3933 . Did anybody already find a solution for this? Thanks for any help ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [vpb] Placing an object on a UTM file generated with osgdem
On 12/12/2011 8:37 AM, Ethan Fahy wrote: Object rotation is the last piece of this puzzle. When on object is placed on a geocentric terrain using the methods outlined in this thread, the object always appears to be oriented correctly upwards with respect to the center of the earth. However I'm not sure how it is being oriented with respect to its rotation. Does anyone have any insight into this? For example if I know that my object's internal coordinate system specifies that positive x is north and positive y is west and I place that object on an arbitrary WGS84, geocentric terrain, how will I know how to rotate the object to line up the north orientation? Just try it. Make an object that points out the X Y and Z local axes graphically and stick it in using the EllispoidModel to orient it to the local ground's upvector and such. It will show you what the orientation ended up like, and then you can see what additional rotations might be needed to get what you expect. I can't recall off the top of my head which object local axis ends up pointed north. -- Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com http://www.alphapixel.com/ Digital Imaging. OpenGL. Scene Graphs. GIS. GPS. Training. Consulting. Contracting. There is no Truth. There is only Perception. To Perceive is to Exist. - Xen ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Reading osg files with images and xml files from archives on Android
Hi Again 2. I use osgDB XmlPasser quite a bit for simple meta data stuff. Is there a way to read an xml file from and archive? I usually read my xml files like so So I solved one of my problems, I used the present 3d plugin as inspiration to write a simple plugin to wrap loading xmlinput into an osg object wrapper. I now just have the issue that images referenced by .osg files are not loaded from the archive, anyone have any advice? The images are referenced relative to the .osg e.g. image\\diffuse.png Loading pngs directly is working fine. Cheers Tom -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44353#44353 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Reading osg files with images and xml files from archives on Android
Hi Tom, I now just have the issue that images referenced by .osg files are not loaded from the archive, anyone have any advice? The images are referenced relative to the .osg e.g. image\\diffuse.png Have you seen Terry Welsh's thread on developing a virtual file system plugin so that a zip file can act as a directory? I think that would work for you, it would mean you don't have any manual things to do to make this work. I suggest you coordinate with him to test his solution and then suggest improvements. That way when he submits the finished product to be included in OSG it will fit your needs. Other than that, I think you're probably left with implementing a ReadFileCallback to intercept the load requests for files referenced by your .osg files, and read them yourself from the zip archive. Hope this helps, J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.dyndns-web.com/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osg threading model
Hi, Excuse me for posting this question as I'm just a beginner in the computer graphics. Which threading model will give the best performance in a dual core computer with Nvidia Quadro graphics card. Also I have a doubt regarding the makeRotate for camera rotation. If I use pitch,roll, yaw order, camera rotation doesn't work. I have to use roll , pitch, yaw order only. Why this is required? Thank you! Cheers, Vijeesh -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=44355#44355 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
