Re: [osg-users] EXTERNAL: Re: voxelization using offscreen rendering
Thanks, that sounds much better than the way I was attempting to do it. Alex -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield Sent: Thursday, June 07, 2012 8:44 PM To: OpenSceneGraph Users Subject: EXTERNAL: Re: [osg-users] voxelization using offscreen rendering Hi Alex, To use the same view point for LOD calculations for nested Camera's the osg::Camera class has a support for setting the ReferenceFrame of the nested Camera to ABSOLUTE_RF_INHERIT_VIEWPOINT which allows them to have independent view matrices but use the same viewpoint and the parent Camera for LOD calcs. The osgShadow NodeKit uses this in it's implementations so have a look the source code entries for setReferenceFrame in it for examples. Robert. On 7 June 2012 22:09, Pecoraro, Alexander N alexander.n.pecor...@lmco.com wrote: Hi, I'm wondering if someone can suggest an elegant solution to the problem of trying to voxelize some triangle based geometry. The general algorithm is to render the scene from multiple different camera view points and then use the resulting color and depth buffer from each render pass to construct a voxel data set. However, the problem is that the geometry that I'm attempting to voxelize has multiple levels of detail so each camera view sees a slightly different level of detail which ends up generating a fuzzy voxel data set. What I need is for the first render pass using the top down overhead camera be the determining factor in the level of detail selection and then all the other camera's should use the same level of detail (i.e. same list of osg::Geometry nodes) when they render. How can I do this using the osg::Camera class? Thanks. Alex ___ 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 mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] 139.com Spam
Hi Rui, On 8 June 2012 05:03, Wang Rui wangra...@gmail.com wrote: I also received the email and fortunately I can speak Chinese. The mail is sent from the 139.com administer and it said that a registered user with the address 13488874...@139.com here is not active, but we still sent mail to him (I think this is because the mail list server automatically send every mail to him), so the 139.com server automatically replied with the notice. A best way to solve it is to remove the inactive user from our mail list. Robert if you couldn't find him, I'll try to contact with their manager to explain the situation. There isn't anyone subscribed to osg-users and osg-submissions with a 139.com domain, let alone this specific address. Could it be another address that is subscribed is forwarding to the 13488874...@139.com address? Thanks for looking into it, Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] 139.com Spam
Hi Robert, I've already wrote a mail to t...@139.com but I don't think they will reply quickly enough, as 139.com in fact belongs to a huge state-owned company (China Mobile) who always ignores others' feelings ;-( Is it possible that this address is registered to the forum and the mail is forwarded from there? Wang Rui 2012/6/8 Robert Osfield robert.osfi...@gmail.com Hi Rui, On 8 June 2012 05:03, Wang Rui wangra...@gmail.com wrote: I also received the email and fortunately I can speak Chinese. The mail is sent from the 139.com administer and it said that a registered user with the address 13488874...@139.com here is not active, but we still sent mail to him (I think this is because the mail list server automatically send every mail to him), so the 139.com server automatically replied with the notice. A best way to solve it is to remove the inactive user from our mail list. Robert if you couldn't find him, I'll try to contact with their manager to explain the situation. There isn't anyone subscribed to osg-users and osg-submissions with a 139.com domain, let alone this specific address. Could it be another address that is subscribed is forwarding to the 13488874...@139.com address? Thanks for looking into it, Robert. ___ 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] Multiple Qt windows showing different nodes without performance loss?
Hi, I am sorry, I do not understand this. Could you expand on this? Which code are you referring to? I'm reffering to ViewerBase::run(). And managing frames. Calling ViewerBase::frame renders one frame. Run() function handles frame rate and on demand rendering, etc. In Qt I'm referering to class HeartBeat localy defined in GraphicsWindowQt.cpp which in fucntion timerEvent handles rendering of frames. Main idea in this is rendering frames in Qt event loop with timer. Timer event is called whenever Qt is not busy with handling other events. Thus you don't have to create custom QTimer for rendering nor custom run() function (or frame() function) with something like HandleQtEvents() call inside. osgQt::setViewer is sufficient, but if you want to render in different thread, you will have to create custom thread loop with exec() call. CompositeViewer: It's very simple, just use osgviewerQt example, but instead of defining timer for updating(), call osgQt::setViewer() in main function (warning: setViewer() uses observer_ptr and locks it, so you will have to create reference pointer of widget instead of normal one) Thank you! Cheers, Filip[/quote] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=48135#48135 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Using the notification API with multi-threading - heap corruption errors
Hi, Beyond mutexes, I am less skilled with thread synchronisation. But in other libraries like Qt sometimes the concept of thread local storage is used to separate resource access from parallel threads. Do you think this concept would be applicable to provide every thread with its own stream? Would this concept be more efficient compared to mutexes? I could imagine that every thread writes to an own stream which then calls the *same* osg::NotifyHandler subclass. This way, the notify handler would be responsible for thread-safeness again (as it is now). It's always problem of standard library. Creating output streams for every thread is overkill and not safe either. What if internal implementation of new streams will call some static internal write() function that won't be threadsafe ? I agree with the argument not to add extra mutexes. But what do you mean with assumption that stream are thread safe? Obviously neither the stream implementation of the Visual compiler under Windows nor the one of the GNU compiler under Lubuntu are thread-safe by nature. Do you know any such implementations or platforms or maybe compiler flags which fulfill this assumption? I agree with that too. Solution using custom osg::NotifyHandler with mutexes is easy and it dont have to be in osg core library, what about using NotifyHandler with mutexes if OSG_NOTIFY_LEVEL is set ? Ok the problem will always persist, if someone use std::out directly, but that is not OSG problem Cheers, Filip -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=48136#48136 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] problem with seams while drawing quads and quad strips
You're right, the normals were the problem. My mistake was using the QUAD_STRIPS and setting the normals for the shared vertices to the combined normals of the adjacent faces. I changed everything to QUADS and used the face's normal as each vertex's normal, and then it looked correct. Thanks! Cheers, Michael -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=48137#48137 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Depth test and RenderBin details
Hi guys, I've been implementing my own dragger (from scratch, I didn't use the osg draggers for specific reasons) and I have some problem with the render order. Basically my dragger is composed of four sub-draggers : - 3 axis dragger (each one composed of a line and a cone) - 1 sphere dragger The 3 axis dragger and the sphere have the same origin. The thing is that I want my whole dragger (the 3 axis and the sphere) to always be rendered on top of the rest of the scene. But when I deactivate the depth test and set the RenderBinDetails on my main dragger (node that contains the four sub-draggers), the sphere (which is the last node to be added to my main dragger) always appears on top of the axis. Is there a way to render my dragger with the depth test between the axis and the sphere, and then to display the whole dragger on top of the rest of the scene ? Thank you! Cheers, Bob -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=48138#48138 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] 139.com Spam
Hi all, Interestingly I don't have any, junk mail or anywhere? I guess this could be filtered out before it reaches me by my ISP(virgin media). Good luck. Martin From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Wang Rui Sent: 08 June 2012 09:51 To: OpenSceneGraph Users Subject: Re: [osg-users] 139.com Spam Hi Robert, I've already wrote a mail to t...@139.com but I don't think they will reply quickly enough, as 139.com in fact belongs to a huge state-owned company (China Mobile) who always ignores others' feelings ;-( Is it possible that this address is registered to the forum and the mail is forwarded from there? Wang Rui 2012/6/8 Robert Osfield robert.osfi...@gmail.com Hi Rui, On 8 June 2012 05:03, Wang Rui wangra...@gmail.com wrote: I also received the email and fortunately I can speak Chinese. The mail is sent from the 139.com administer and it said that a registered user with the address 13488874...@139.com here is not active, but we still sent mail to him (I think this is because the mail list server automatically send every mail to him), so the 139.com server automatically replied with the notice. A best way to solve it is to remove the inactive user from our mail list. Robert if you couldn't find him, I'll try to contact with their manager to explain the situation. There isn't anyone subscribed to osg-users and osg-submissions with a 139.com domain, let alone this specific address. Could it be another address that is subscribed is forwarding to the 13488874...@139.com address? Thanks for looking into it, Robert. ___ 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] Custom Camera and Multi-stage Rendering (RenderStage)
I'm a little confused here … I’m working on an application and I think I’m close to completing it but I have come to a point where I need some help. First some background : The application requires anti-aliasing of a scene and the subsequent creation of floating point color and depth textures that can be sampled and used like any ordinary texture. Specifically I need to do the following: 1) Render the scene to an offscreen FBO that has float color and depth render buffers attached to it and is configured for AA 2) Automatically blit the color and depth buffers in the FBO to another FBO that has attached float color and depth textures. 3) Query/sample the depth texture and map the color texture onto a quad I have successfully got this to work in standard OpenGL. Now I am trying to understand how to do this in an OpenSceneGraph context. I see that RenderStage has what I need in terms of the render buffer and resolve buffer blit … good so far … So … I suspect that what I need to do is to get a pointer to a RenderStage and configure that instance. I have a custom camera class (class IRCamera : public osg::Camera) that I am using for offscreen rendering. Currently it just has a color texture attached to it and I am using that rendered texture successfully. I want to rework this custom camera class to use the multi-stage approach so that I can take advantage of AA and still have the rendered results in a texture. Is there a way for me to get a pointer to a RenderStage instance associated with my custom camera? Is this the proper approach for what I want to do? Thanks in advance, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=48142#48142 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom Camera and Multi-stage Rendering (RenderStage)
I'm fairly certain you can access the RenderStage in a Camera callback, but I'm not sure you're approaching the problem correctly. It seems like the multipass rendering you describe below could be accomplished by using a series of Cameras. In OSG these must be arranged hierarchically, but you set the Cameras as pre- or post-render to specify the sequential rendering order. There's an osgprerender example that uses multiple Cameras, which you might find helpful. -Paul On 6/8/2012 9:30 AM, Paul Leopard wrote: I'm a little confused here … I’m working on an application and I think I’m close to completing it but I have come to a point where I need some help. First some background : The application requires anti-aliasing of a scene and the subsequent creation of floating point color and depth textures that can be sampled and used like any ordinary texture. Specifically I need to do the following: 1) Render the scene to an offscreen FBO that has float color and depth render buffers attached to it and is configured for AA 2) Automatically blit the color and depth buffers in the FBO to another FBO that has attached float color and depth textures. 3) Query/sample the depth texture and map the color texture onto a quad I have successfully got this to work in standard OpenGL. Now I am trying to understand how to do this in an OpenSceneGraph context. I see that RenderStage has what I need in terms of the render buffer and resolve buffer blit … good so far … So … I suspect that what I need to do is to get a pointer to a RenderStage and configure that instance. I have a custom camera class (class IRCamera : public osg::Camera) that I am using for offscreen rendering. Currently it just has a color texture attached to it and I am using that rendered texture successfully. I want to rework this custom camera class to use the multi-stage approach so that I can take advantage of AA and still have the rendered results in a texture. Is there a way for me to get a pointer to a RenderStage instance associated with my custom camera? Is this the proper approach for what I want to do? Thanks in advance, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=48142#48142 ___ 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] Custom Camera and Multi-stage Rendering (RenderStage)
There's also the osgfpdepth example, which does render to an FBO with a floating point depth buffer and then renders the image to the window color buffer. Tim On Fri, Jun 8, 2012 at 6:25 PM, Paul Martz pma...@skew-matrix.com wrote: I'm fairly certain you can access the RenderStage in a Camera callback, but I'm not sure you're approaching the problem correctly. It seems like the multipass rendering you describe below could be accomplished by using a series of Cameras. In OSG these must be arranged hierarchically, but you set the Cameras as pre- or post-render to specify the sequential rendering order. There's an osgprerender example that uses multiple Cameras, which you might find helpful. -Paul On 6/8/2012 9:30 AM, Paul Leopard wrote: I'm a little confused here … I’m working on an application and I think I’m close to completing it but I have come to a point where I need some help. First some background : The application requires anti-aliasing of a scene and the subsequent creation of floating point color and depth textures that can be sampled and used like any ordinary texture. Specifically I need to do the following: 1) Render the scene to an offscreen FBO that has float color and depth render buffers attached to it and is configured for AA 2) Automatically blit the color and depth buffers in the FBO to another FBO that has attached float color and depth textures. 3) Query/sample the depth texture and map the color texture onto a quad I have successfully got this to work in standard OpenGL. Now I am trying to understand how to do this in an OpenSceneGraph context. I see that RenderStage has what I need in terms of the render buffer and resolve buffer blit … good so far … So … I suspect that what I need to do is to get a pointer to a RenderStage and configure that instance. I have a custom camera class (class IRCamera : public osg::Camera) that I am using for offscreen rendering. Currently it just has a color texture attached to it and I am using that rendered texture successfully. I want to rework this custom camera class to use the multi-stage approach so that I can take advantage of AA and still have the rendered results in a texture. Is there a way for me to get a pointer to a RenderStage instance associated with my custom camera? Is this the proper approach for what I want to do? Thanks in advance, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=48142#48142 ___ 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 mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Custom Camera and Multi-stage Rendering (RenderStage)
Thanks for your help, I'll check into the Camera callback. I've dissected the
the osgfpdepth example already ... that's where I learned to do the floating
point depth buffer and the anti-aliasing setup for a frame buffer object. I'll
look into it again to see if I've missed something ...
I'm fairly certain that I'm approaching it the correct way as RenderStage calls
glBlitFramebuffer(...) to blit from a buffer to a texture according to a buffer
attachment map owned by its resolve FBO :
Code:
GLbitfield blitMask = 0;
//find which buffer types should be copied
for (FrameBufferObject::AttachmentMap::const_iterator
it = _resolveFbo-getAttachmentMap().begin(),
end =_resolveFbo-getAttachmentMap().end(); it != end; ++it)
{
switch (it-first)
{
case Camera::DEPTH_BUFFER:
blitMask |= GL_DEPTH_BUFFER_BIT;
break;
case Camera::STENCIL_BUFFER:
blitMask |= GL_STENCIL_BUFFER_BIT;
break;
case Camera::PACKED_DEPTH_STENCIL_BUFFER:
blitMask |= GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT;
break;
case Camera::COLOR_BUFFER:
blitMask |= GL_COLOR_BUFFER_BIT;
break;
default: ...
}
}
// Bind the resolve framebuffer to blit into.
_fbo-apply(state, FrameBufferObject::READ_FRAMEBUFFER);
_resolveFbo-apply(state, FrameBufferObject::DRAW_FRAMEBUFFER);
if (blitMask)
{
// Blit to the resolve framebuffer.
fbo_ext-glBlitFramebuffer(
0, 0, static_castGLint(_viewport-width()),
static_castGLint(_viewport-height()),
0, 0, static_castGLint(_viewport-width()),
static_castGLint(_viewport-height()),
blitMask, GL_NEAREST);
}
[/code]
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[osg-users] The cow is alive! .... with Necessitas
Hi, after many days i have been succesfull to display that hell of cow on my Archos 80 G9, using OSG 3.0.1 compiled for Android under Ubuntu 11, and Necessitas (QT for Android) using OGLES1.1 [Image: http://img17.imageshack.us/img17/7555/p6082164.jpg ] Probably i have made some mistakes, but i have been forced to recompile Necessitas QT Framework to debug some libEGL errors, and i have modified two lines of code: In qandroideglplatformcontext.ccp //m_eglContext = eglCreateContext(m_eglDisplay,config, EGL_NO_CONTEXT, attribList); - m_eglContext = eglCreateContext(m_eglDisplay,config, EGL_NO_CONTEXT, 0); In qeglconvenience.cpp EGLConfig cfg = 0; QVectorEGLint configureAttributes = q_createConfigAttributesFromFormat(format); [...] configureAttributes.append(EGL_OPENGL_ES2_BIT); configureAttributes.append(EGL_NONE); - EGLConfig cfg = 0; QVectorEGLint configureAttributes = q_createConfigAttributesFromFormat(format); [...] configureAttributes.append(EGL_OPENGL_ES_BIT); configureAttributes.append(EGL_NONE); I have not enough skills to fully understand this code, but i guess that QT was initializing EGL for OGLES 2.0 and not for OGLES 1.1, while i was using the following defines in QT Creator DEFINES += \ QT_OPENGL_ES \ QT_OPENGL_ES_1 \ EGL_OPENGL_ES_API \ OSG_GLES1_AVAILABLE \ OSG_GL_MATRICES_AVAILABLE \ OSG_GL_VERTEX_FUNCS_AVAILABLE \ OSG_GL_VERTEX_ARRAY_FUNCS_AVAILABLE \ OSG_GL_FIXED_FUNCTION_AVAILABLE \ OSG_BUILD_PLATFORM_ANDROID \ OSG_LIBRARY_STATIC The cow.osg file ha been reduced removing the texture, to avoid errors with OGLES 1.1 Cheers, Massimo[/img] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=48146#48146 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] 8 Weeks till the Openscenegraph BOF at SIGGRAPH
Hello, Delurking. 8 August 2012. 10AM - 11AM. Commence making those videos and slides. Be the first geek in your neighborhood to reserve a slot:) John F. Richardson smime.p7s Description: S/MIME cryptographic signature ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osggis_build
Hi, all! when i use osggis_build tool to create the boston-sample example.the cmd is C:\Documents and Settings\Administratorosggis_buildd --threads 1 -f E:\Program Files\osg_3_0_0VS9SP1\osgGIS\GISDATA\boston-sample\project.xml, but no data output and there is a warn[osgGIS] WARN: Unable to load data for terrain default. [osgGIS] Done, total build time = 1.15577s Closing DynamicLibrary osgPlugins-3.0.0/osgdb_ived.dll. why? And how do i? thank you. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
