Re: [osg-users] [vpb] Problems using SSI Cluster Example
Hi, Yes, I'm using vpbmaster program, but I have just fixed my error. The problem was --machine doesn't is showed by --help option, but even so it works fine. Thanks, Samuel -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21764#21764 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Precipitation Effect, Snow, bad rendering at slow speed
Hi Massimo, Thanks for the pictures. Moving slow is a walking pace, not at 360km/h.. that's pretty fast in my book. The streaks are motion blurr on the particles as when you are moving fast the particle moves relative to the eye point between frames will be stretched out. As the particle is stretched out the alpha value also gets reduced so it becomes more transparent particle to make sure the overall coverage of the background is the same. So the slow case it looks like things are working correctly to me. For the fast case the motion blur support in PrecipitationEffect is failing as the camera is moving so fast between the particle cells that their is no previous frame position recorded for it to compute the motion blur for. This is a limitation/bug in PreciptationEffect. I wrote this class originally for a driving sim so it works well for driving speeds, but at jet aircraft speeds this particle cell issue rears it's head. These cells are virtual cells, which are in fact a single osg::Geometry that is transformed many times in the view in front of you, these virtual cells are reassigned on the fly to give you the effect of having an infinite particle system. I can think of two solutions - to better compute the previous frame position of a virtual cell that is newly coming into the view, or the more hacky solution, increase the depth of cells further out from camera so that the first frame that they become in view are miss out on the motion blur is far away enough from the camera as to not be seen. The former of the two solution really has to be the right way to go. Now fixing this bug will lead to motion blur at both your slow and fast speeds, which I can't say how you'll react to, as you picked out the slow viz as the one in error, rather than the fast speed. One could possible offer the option of removing the motion blur effect or scaling it down, but this itself might lead to other artifacts such as strobe like effect as you will find it easier to spot patterns in the particles as you go from cell to cell. Robert. On Mon, Dec 21, 2009 at 8:12 PM, Massimo Tarantini subbi...@yahoo.it wrote: From your description it sounds like an issue that occurs when the camera moves very fast relative to the particle system, rather than very slow. My only guess is that you've model units that aren't in meters so the velocities are out. Now i have also posted the 3 images to imageshack: http://img189.imageshack.us/img189/5565/static594.jpg http://img189.imageshack.us/img189/9955/movingslow526.jpg http://img189.imageshack.us/img189/5372/movingfast976.jpg Anyway, the problem is in movingslow526.jpg at 360kmh, while movingfast976.jpg at 1800kmh is better, and static594.jpg (stopped) is perfect. My terrain is generated with osgdem (non Geogentric), and is in UTM33/WGS84. The Geographics coordinates are in meters. Thanks.[/list] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21746#21746 ___ 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] glActiveTexture is called many times
Hi Lilith, It sounds like the lazy state updating in osg::State isn't functioning in this case, either a bug or an oversight. Have you determined that this issue still occurs in svn/trunk? Robert. On Tue, Dec 22, 2009 at 12:54 AM, Lilith Bryant dark...@gmail.com wrote: Hi Robert, and the list, I have found a performance issue with multitexturing. Once a state has had texture attributes applied for units =1 then excessive calls to glActiveTexture are made forever more. In particular, State::apply() and applyTextureMode() and applyTextureAttribute() unconditionally change the active texture unit (with setActiveTextureUnit), even if they cause no actual state change. The GL trace ends up littered with glActiveTexture calls: glActiveTexture(GL_TEXTURE0) glBindTexture(GL_TEXTURE_2D,2) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_BORDER) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_BORDER) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR) glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAX_ANISOTROPY_EXT,1.00) glTexParameterfv(GL_TEXTURE_2D,GL_TEXTURE_BORDER_COLOR,0x4a8f8ac) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_COMPARE_MODE,GL_ZERO) glActiveTexture(GL_TEXTURE1) glActiveTexture(GL_TEXTURE2) glActiveTexture(GL_TEXTURE3) glCallList(4) All those glActiveTexture calls happen on every single call to State::apply() Note this is even after all the multitextured things are removed from the scene. It occur because the textureModeMapList and textureAttributeMapList are expanded, but never contracted. This itself isn't a problem, but the unconditional changing of the active texture unit in State::apply() etc, JUST IN CASE, is the problem. Back in v1.2 I implemented a fix for this, that I never got around to submitting. Essentially it moves the call to setActiveTextureUnit from State::apply etc down into the State::applyMode/applyAttribute/ applyGlobalDefault functions. This allows those functions to decide at the very last moment if the active texture unit really does need changing. This requires that applyMode/applyAttribute etc take an new optional TexUnit parameter (with -1 meaning DONT CARE WHICH, which is the value used for normal attributes/modes ) . The alternative to a parameter is a member variable in State, requiredStateChangeTexUnit or similar. This is clearly going to be quite an invasive patch to otherwise very old code, so before I port my patch to the SVN head and submit it, I thought I'd run it past you to see if: a) You'd be interested in receiving such a submission, and b) If you had a preference as to using a parameter vs member variable for the required tex unit. I have attached my changed v1.2 files for your reference. Regards, Lilith ___ 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] Simple water effects
Hi Dominic, On Mon, Dec 21, 2009 at 8:43 PM, Dominic Stalder dominic.stal...@bluewin.ch wrote: I know the amazing looking osgOcean, but for our game it uses to much CPU. Might I suggest you engage with the authors/contributors of osgOcean and find a way of avoiding this overhead. This almost certainly will take less time to realize a final solution and will be of benefit to all osgOcean users. Cheers, Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] glActiveTexture is called many times
Yes, this occurs in all of v1.2, v2.8.2, v2.9.6, and SVN head as of yesterday. setActiveTextureUnit does indeed call glActiveTexture only when the requested unit is different to the previous call to setActiveTextureUnit. So in this respect, it's state caching is working. However, State::apply runs through a loop calling setActiveTextureUnit for each texture unit that it has ever heard about. This loop nicely cycles through, passing setActiveTextureUnit a fresh unit number on each iteration, changing the GL texture unit every single time, regardless of whether applyModeMap/applyAttributeMap actually do anything. On 12/22/2009 10:32:24 PM, Robert Osfield wrote: Hi Lilith, It sounds like the lazy state updating in osg::State isn't functioning in this case, either a bug or an oversight. Have you determined that this issue still occurs in svn/trunk? Robert. On Tue, Dec 22, 2009 at 12:54 AM, Lilith Bryant dark...@gmail.com wrote: Hi Robert, and the list, I have found a performance issue with multitexturing. Once a state has had texture attributes applied for units =1 then excessive calls to glActiveTexture are made forever more. In particular, State::apply() and applyTextureMode() and applyTextureAttribute() unconditionally change the active texture unit (with setActiveTextureUnit), even if they cause no actual state change. The GL trace ends up littered with glActiveTexture calls: glActiveTexture(GL_TEXTURE0) glBindTexture(GL_TEXTURE_2D,2) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_BORDER) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_WRAP_T,GL_CLAMP_TO_BORDER) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR) glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_MAX_ANISOTROPY_EXT,1.00) glTexParameterfv(GL_TEXTURE_2D,GL_TEXTURE_BORDER_COLOR,0x4a8f8ac) glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_COMPARE_MODE,GL_ZERO) glActiveTexture(GL_TEXTURE1) glActiveTexture(GL_TEXTURE2) glActiveTexture(GL_TEXTURE3) glCallList(4) All those glActiveTexture calls happen on every single call to State::apply() Note this is even after all the multitextured things are removed from the scene. It occur because the textureModeMapList and textureAttributeMapList are expanded, but never contracted. This itself isn't a problem, but the unconditional changing of the active texture unit in State::apply() etc, JUST IN CASE, is the problem. Back in v1.2 I implemented a fix for this, that I never got around to submitting. Essentially it moves the call to setActiveTextureUnit from State::apply etc down into the State::applyMode/applyAttribute/ applyGlobalDefault functions. This allows those functions to decide at the very last moment if the active texture unit really does need changing. This requires that applyMode/applyAttribute etc take an new optional TexUnit parameter (with -1 meaning DONT CARE WHICH, which is the value used for normal attributes/modes ) . The alternative to a parameter is a member variable in State, requiredStateChangeTexUnit or similar. This is clearly going to be quite an invasive patch to otherwise very old code, so before I port my patch to the SVN head and submit it, I thought I'd run it past you to see if: a) You'd be interested in receiving such a submission, and b) If you had a preference as to using a parameter vs member variable for the required tex unit. I have attached my changed v1.2 files for your reference. Regards, Lilith ___ 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] Simple water effects
Hello All, Did somebody mention water effects?! I have recognised the CPU usage of osgOcean as a bit of a problem. This is due to the osgOcean using one huge vertex/normal array for all of the ocean tiles and then copying the vertices for each tile in on frame/position changes. It was a rather bad design decision which once I had committed to proved too time consuming to change. However, due to the tillable nature of the FFT ocean surface, this isn't necessary. A little while ago I wrote some test cases which removed this huge vertex array and replaced it with a single high resolution ocean tile which is then instanced for each tile in the ocean surface. The different resolution tiles are then supported simply by modifying the primitives and positioning the tiles using a vertex shader. Since all of the high resolution tiles are precomputed, updating the animation of the ocean surface is simply a matter of changing the pointer to the next frames vertex array for each of the tile primitives. This is a far more efficient method of updating the surface, particularly if you are using a very large surface. I have the code for all of this as a prototype, but I don't have the time to tidy it up and update library at the moment. If you are interested in making these modifications I would be more than happy to give you the code and walk you through it, otherwise it'll have to wait until I get some time to do it myself. Regards, Kim. 2009/12/22 Robert Osfield robert.osfi...@gmail.com Hi Dominic, On Mon, Dec 21, 2009 at 8:43 PM, Dominic Stalder dominic.stal...@bluewin.ch wrote: I know the amazing looking osgOcean, but for our game it uses to much CPU. Might I suggest you engage with the authors/contributors of osgOcean and find a way of avoiding this overhead. This almost certainly will take less time to realize a final solution and will be of benefit to all osgOcean users. Cheers, 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] volumetric fog
Hi Community, has anybody done some work with this? Could you share some ideas, hints? Thanks Nick http://www.linkedin.com/in/tnick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Way to Draw Lots of spheres
Hi,
I am new to OSG. I am trying to draw a lot of spheres into a scene. By lots I
mean on the order of a 100,000 or so. This really brings my simple test app to
its knees. Here is the current way I am drawing these spheres:
Code:
osg::Sphere *unitSphere = new osg::Sphere(osg::Vec3(0,0,0),5.0);
osg::ShapeDrawable* unitSphereDrawable = new osg::ShapeDrawable(unitSphere);
for(1...100,000)
{
osg::PositionAttitudeTransformation *shpereXForm = new
osg::PositionAttitudeTransformation();
sphereXForm-setPosition(position);
osg::Geode* unitShpereGeode = new osg::Geode();
sphereXForm-addChild(unitSphereGeode);
unitSphereGeode-addDrawable(draw);
GetScene()-AddDrawable(unitSphereGeode);
}
Our current product uses straight 2D OpenGL calls and uses points instead of
spheres to draw the dataset. We are currently porting everything to 3D using
OSG and found that we might have to do something unique when it comes to
displaying the dataset we are trying to display. The dataset we are trying to
draw doesn't persist over time. Its there one second and gone the next. I
need a quick way to draw lot of spheres very quickly. I have started looking
into overriding the Camera::DrawCallback and add raw OpenGL calls. Is this the
right path to look down or is there something easier?
I apologize in advance if there is a simple answer to this that a newb like me
should have seen or something I am doing completely wrong.
Thank you!
Cheers.
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=21774#21774
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[osg-users] Wiki Location for List of Plugins and Descriptions
All, Does the Wiki site have a list of all the osgXXX plugins that are available for use with a short discription of them. I know about osgOcean, osgCal, osgCluster and I'm sure there are alot of others and would like to have a central place to see what is availabe with descriptions/screen shots if available. Thanks Michael -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21776#21776 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Wiki Location for List of Plugins and Descriptions
Hi Michael, There is a page on the osg website that covers them: http://www.openscenegraph.org/projects/osg/wiki/Community http://www.openscenegraph.org/projects/osg/wiki/CommunityUnder the software header. But I agree it would be nice to have a more obvious place to list them and some attractive screenshots, after all it is all computer graphics :) I *think* this was raised a while ago but nothing came of it. Kim. 2009/12/22 Michael Hartman mike.hart...@us.army.mil All, Does the Wiki site have a list of all the osgXXX plugins that are available for use with a short discription of them. I know about osgOcean, osgCal, osgCluster and I'm sure there are alot of others and would like to have a central place to see what is availabe with descriptions/screen shots if available. Thanks Michael -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21776#21776 ___ 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] osgAnimation/Skinning Header
Hi here, I'm currently trying to get OpenSceneGraph and osgswig to work together on Mac OS X Snow Leopard through MacPorts (I'm a maintainer there). It seems the latest developer release (2.9.6) does not install osgAnimation/Skinning header, which is used by osgswig. Is it a bug, or should osgswig not use it? Regards. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Wiki Location for List of Plugins and Descriptions (UNCLASSIFIED)
Classification: UNCLASSIFIED Caveats: NONE Kim, Thank you for the information, after digging down some I saw the nodekit section that listed some of the projects that are available. Thanks again, Mike Michael Hartman Torch Technologies Huntsville, AL 35802 Supporting US Army Aviation Missile RDEC System Simulation and Development Directorate 256-876-0110 mike.hart...@us.army.mil mike.hart...@redstone.army.smil.mil www.torchtechnologies.com -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Kim Bale Sent: Tuesday, December 22, 2009 7:46 AM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] Wiki Location for List of Plugins and Descriptions Hi Michael, There is a page on the osg website that covers them: http://www.openscenegraph.org/projects/osg/wiki/Community blockedhttp://www.openscenegraph.org/projects/osg/wiki/Community blockedhttp://www.openscenegraph.org/projects/osg/wiki/Community Under the software header. But I agree it would be nice to have a more obvious place to list them and some attractive screenshots, after all it is all computer graphics :) I *think* this was raised a while ago but nothing came of it. Kim. 2009/12/22 Michael Hartman mike.hart...@us.army.mil All, Does the Wiki site have a list of all the osgXXX plugins that are available for use with a short discription of them. I know about osgOcean, osgCal, osgCluster and I'm sure there are alot of others and would like to have a central place to see what is availabe with descriptions/screen shots if available. Thanks Michael -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21776#21776 blockedhttp://forum.openscenegraph.org/viewtopic.php?p=21776#21776 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g blockedhttp://lists.openscenegraph.org/listinfo.cgi/osg-users-openscene graph.org Classification: UNCLASSIFIED Caveats: NONE ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgAnimation/Skinning Header
Hi, Skinning header is not used anymore, it has been replaced with RigTransformSoftware. Cheers, Cedric -- Provide OpenGL services around OpenSceneGraph and more +33 659 598 614 Cedric Pinson mailto:cedric.pin...@plopbyte.net http://www.plopbyte.net On Tue, 2009-12-22 at 14:57 +0100, nox wrote: Hi here, I'm currently trying to get OpenSceneGraph and osgswig to work together on Mac OS X Snow Leopard through MacPorts (I'm a maintainer there). It seems the latest developer release (2.9.6) does not install osgAnimation/Skinning header, which is used by osgswig. Is it a bug, or should osgswig not use it? Regards. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org signature.asc Description: This is a digitally signed message part ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osg-examples on google code
Hi Community, I came accross the osg examples hosted on google code http://code.google.com/p/osg-glsl-examples/source/checkout http://code.google.com/p/osg-glsl-examples/source/checkoutthe svn is down. Any info about this project? Thanks, Nick http://www.linkedin.com/in/tnick Sent from Devlet, Ankara, Turkey ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to integrate OSG with java (to make an applet)
Ok, i'll try installing OSGVirtualPlanets Manuel -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21781#21781 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Way to Draw Lots of spheres
Hi Clayton,
I remember a recent thread about this. In that case, the problem was the
tesselation level of the spheres. Try lowering it:
http://www.mail-archive.com/osg-users@lists.openscenegraph.org/msg33587.html
--
Alberto
Clayton Bluhm writes:
Hi,
I am new to OSG. I am trying to draw a lot of spheres into a scene. By lots
I mean on the order of a 100,000 or so. This really brings my simple test
app to its knees. Here is the current way I am drawing these spheres:
Code:
osg::Sphere *unitSphere = new osg::Sphere(osg::Vec3(0,0,0),5.0);
osg::ShapeDrawable* unitSphereDrawable = new osg::ShapeDrawable(unitSphere);
for(1...100,000)
{
osg::PositionAttitudeTransformation *shpereXForm = new
osg::PositionAttitudeTransformation();
sphereXForm-setPosition(position);
osg::Geode* unitShpereGeode = new osg::Geode();
sphereXForm-addChild(unitSphereGeode);
unitSphereGeode-addDrawable(draw);
GetScene()-AddDrawable(unitSphereGeode);
}
Our current product uses straight 2D OpenGL calls and uses points instead of
spheres to draw the dataset. We are currently porting everything to 3D using
OSG and found that we might have to do something unique when it comes to
displaying the dataset we are trying to display. The dataset we are trying
to draw doesn't persist over time. Its there one second and gone the next.
I need a quick way to draw lot of spheres very quickly. I have started
looking into overriding the Camera::DrawCallback and add raw OpenGL calls.
Is this the right path to look down or is there something easier?
I apologize in advance if there is a simple answer to this that a newb like
me should have seen or something I am doing completely wrong.
Thank you!
Cheers.
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=21774#21774
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Re: [osg-users] Transforming nodes
Dear Brendan, That was absolutely the problem!! Thanks so much for your help. Sincerely, Oren p.s. I wish there was some kind of heads-up in the header file for DOFTransform!! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21786#21786 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] curl Plugun + OSG
Hi Jean-Sebastien, Thank you for the reply. I've never used CMAKE on windows so this is kind of first try for me. I downloaded libcurl-7.15.1-msvc-win32-ssl-0.9.8a-zlib-1.2.3.zip file. It contains src lib include directory. As far as I understand, I need to add CURL_INCLUDE_DIR refers to libcurl\lib directory and CURL_LIBRAY refers to root of libcurl source directory? Is it correct? Thank you! Cheers, Danny -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21787#21787 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Hi, but for some reason the default scale for an osgSim::DOFTransform is (0,0,0) To me that seems a rather bad default to have for scaling on a DOF, I would have assumed the default would be 1,1,1 not 0,0,0 Is there a reason why its 0,0,0, and not 1,1,1 and should we change it BTW the default for MPI FLT DOF node is 1,1,1 Thank you! Cheers, GordonTomlinson -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21788#21788 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Way to Draw Lots of spheres
Hi Clayton,
On 22/12/09 2:30 PM, Clayton Bluhm wrote:
I am new to OSG. I am trying to draw a lot of spheres into a scene. By lots I
mean on
the order of a 100,000 or so. This really brings my simple test app to its
knees. Here is
the current way I am drawing these spheres:
osg::Sphere *unitSphere = new osg::Sphere(osg::Vec3(0,0,0),5.0);
osg::ShapeDrawable* unitSphereDrawable = new osg::ShapeDrawable(unitSphere);
for(1...100,000)
{
osg::PositionAttitudeTransformation *shpereXForm = new
osg::PositionAttitudeTransformation();
sphereXForm-setPosition(position);
osg::Geode* unitShpereGeode = new osg::Geode();
sphereXForm-addChild(unitSphereGeode);
unitSphereGeode-addDrawable(draw);
GetScene()-AddDrawable(unitSphereGeode);
}
Our current product uses straight 2D OpenGL calls and uses points instead of
spheres
to draw the dataset. We are currently porting everything to 3D using OSG and
found that we
might have to do something unique when it comes to displaying the dataset we
are trying to
display. The dataset we are trying to draw doesn't persist over time. Its
there one second
and gone the next. I need a quick way to draw lot of spheres very quickly. I
have started
looking into overriding the Camera::DrawCallback and add raw OpenGL calls. Is
this the
right path to look down or is there something easier?
Any particular reason why you're switching from points to spheres? Drawing
100,000
spheres (underneath a PAT, too, so a separate matrix for each!) with maybe ~100
vertices
will certainly perform worse than simply drawing 100,000 points.
Some ideas:
- stay away from ShapeDrawable if performance matters
- sphere tesselation is probably way to high (as mentioned)
- having a flat hierarchy of PAT/Geode is bad for culling
- share the Geode (like you are sharing the ShapeDrawable) by attaching it to
different
PATs (affects memory footprint)
- have a look at instancing to avoid getting bogged down in the cull traversal
- use point sprites instead?
/ulrich
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Re: [osg-users] Way to Draw Lots of spheres
HI Clayton? Bluhm? Could you sign with your first name so we know who to address, thanks. On Tue, Dec 22, 2009 at 1:30 PM, Clayton Bluhm nashi...@gmail.com wrote: I am new to OSG. I am trying to draw a lot of spheres into a scene. By lots I mean on the order of a 100,000 or so. This really brings my simple test app to its knees. Here is the current way I am drawing these spheres: I regret the day I wrote ShapeDrawable. It has to be the most abused class in the OSG's history. It's a quick and dirty convenience class for visualizing primitive shapes, but has ended getting used to do lots of tasks it really isn't suited for... drawing hundreds of thousands of sphere's is just another example. So my first bit of advice is drop ShapeDrawable and implement what you need using osg::Geometry that contains points, and use the osg::Point osg::PointSprite StateAttribute to control the visualization of the points. Have a look at the osgpointsprite example. If you absolutely have to use real geometry rather than point spites than using an osg::Geometry and build the geometry at the level of tessellation you need. see osggeometry for an example of geometry creation. Other potential developments would be to use geometry instancing, or a custom drawable. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] How to set up the PageLOD?
Hi everybody, I've got a problem - FPS falls down from 100 to 2-3 for 1-2 seconds during first load of more detailed level of PageLODs (when they're first seen). We suppose it's because of object compilation (there are messages about textures loading etc. on the console). FPS also falls down when we look at newly loaded objects. Is it possible to compile objects prior to their rendering? How to set up the PageLOD? Or maybe there are other ways to solve that? -- Maxim Gammer ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] volumetric fog
There are probably lots of ways to do volumetric fog. Here's one way that can be implemented in a shader with a 1D texture as input: http://mrl.nyu.edu/~perlin/experiments/gabor/ -- Terry Welsh / mogumbo 'at' gmail.com www.reallyslick.com / www.mogumbo.com Message: 10 Date: Tue, 22 Dec 2009 15:29:38 +0200 From: Trajce Nikolov nikolov.tra...@gmail.com To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Subject: [osg-users] volumetric fog Message-ID: 6861bc940912220529i6cd16fdaib94fe7a1db3a8...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 Hi Community, has anybody done some work with this? Could you share some ideas, hints? Thanks Nick http://www.linkedin.com/in/tnick -- next part -- An HTML attachment was scrubbed... URL: http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20091222/2cc92ec8/attachment-0001.htm ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to set up the PageLOD?
Hi Maxim First try : view-getDatabasePager()-setSchedulePriority(OpenThreads::Thread::THREAD_PRIORITY_LOW); Set the priority you prefer. Maybe this can help. Regard, Vincent. Maxim Gammer a écrit : Hi everybody, I've got a problem - FPS falls down from 100 to 2-3 for 1-2 seconds during first load of more detailed level of PageLODs (when they're first seen). We suppose it's because of object compilation (there are messages about textures loading etc. on the console). FPS also falls down when we look at newly loaded objects. Is it possible to compile objects prior to their rendering? How to set up the PageLOD? Or maybe there are other ways to solve that? -- Maxim Gammer ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org __ Information from ESET NOD32 Antivirus, version of virus signature database 4709 (20091222) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] volumetric fog
thanks Terry! Nick http://www.linkedin.com/in/tnick Sent from Ünalan, İstanbul, Turkey On Tue, Dec 22, 2009 at 6:38 PM, Terry Welsh mogu...@gmail.com wrote: There are probably lots of ways to do volumetric fog. Here's one way that can be implemented in a shader with a 1D texture as input: http://mrl.nyu.edu/~perlin/experiments/gabor/ -- Terry Welsh / mogumbo 'at' gmail.com www.reallyslick.com / www.mogumbo.com Message: 10 Date: Tue, 22 Dec 2009 15:29:38 +0200 From: Trajce Nikolov nikolov.tra...@gmail.com To: OpenSceneGraph Users osg-users@lists.openscenegraph.org Subject: [osg-users] volumetric fog Message-ID: 6861bc940912220529i6cd16fdaib94fe7a1db3a8...@mail.gmail.com Content-Type: text/plain; charset=iso-8859-1 Hi Community, has anybody done some work with this? Could you share some ideas, hints? Thanks Nick http://www.linkedin.com/in/tnick -- next part -- An HTML attachment was scrubbed... URL: http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20091222/2cc92ec8/attachment-0001.htm ___ 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] How to set up the PageLOD?
Hi Maxim, It sounds like the compilation of OpenGL objects is causing the frame drop. The new default for the DatabasePager is for the incremental pre compilation to be turned off, and for databases that are well balanced this doesn't cause problems with frame drops as the number of new objects per frame is kept modest so one doesn't get close to breaking frame when the new objects come in. For databases where there are lots of OpenGL objects that are introduced at once you can switch back on the incremental pre compile, the tells the DatabasePager to record all the OpenGL objects that need compiling and then on each frame compile as many as it can within specified time and number limits. The incremental compile reduces the overhead per frame so reduces the chances of breaking frame, however, it also increases the amount of time it takes to prepare a scene graph before it can be merged with the main databases - so there is higher latency between requesting a tile and when it's served up. To switch on the pre compile use: viewer.getDatabasePager()-setDoPreCompile(true); There is a whole suite of methods relating to the fine control of pre compile in the DatabasePager so have a look over the headers. The other thing you could do is improve the suitability of your databases so that it's better balanced - for instance switching between LOD levels shouldn't introduce so much geometry/textures at one time. Try to create a quad tree paged database where each tile is divided in four, and each child contains roughly the same amount of geometry and textures as it's parent. Such a well balanced database won't suddenly introduce lots of geometry and textures in one go. Robert. On Tue, Dec 22, 2009 at 4:20 PM, Maxim Gammer maxgam...@gmail.com wrote: Hi everybody, I've got a problem - FPS falls down from 100 to 2-3 for 1-2 seconds during first load of more detailed level of PageLODs (when they're first seen). We suppose it's because of object compilation (there are messages about textures loading etc. on the console). FPS also falls down when we look at newly loaded objects. Is it possible to compile objects prior to their rendering? How to set up the PageLOD? Or maybe there are other ways to solve that? -- Maxim Gammer ___ 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] volumetric fog
hi Paul, can you share this piece of code? Nick http://www.linkedin.com/in/tnick Sent from Ünalan, İstanbul, Turkey On Tue, Dec 22, 2009 at 7:25 PM, Paul Martz pma...@skew-matrix.com wrote: You should be able to subtract the front of the volume from the back (subtract the depth values, that is) and do an exp on the result to determine the alpha of the fog color to combine. I had some test code doing this several years ago, pre depth mapping in hardware, which produced promising results. One day I hope to port it to use modern hardware. Paul Martz Skew Matrix Software LLC _http://www.skew-matrix.com_ http://www.skew-matrix.com/ +1 303 859 9466 Trajce Nikolov wrote: Hi Community, has anybody done some work with this? Could you share some ideas, hints? Thanks Nick http://www.linkedin.com/in/tnick ___ 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] Simple water effects
Hi Dominic, I can't find the real worldz examples on the net, do you have the source? If that was part of the GLSL (orange) book, then check here: http://mew.cx/glsl/ Mike Weiblen (which is a member of this list) archived the 3DLabs GLSL stuff when it wasn't available from the 3DLabs site anymore... In particular I think you want this file: http://mew.cx/glsl/GLSL_Book_2nd_Ed_Examples.zip The source you're looking for will probably be in there somewhere. Hope this helps, J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Simple water effects
Hi Kim, I have the code for all of this as a prototype, but I don't have the time to tidy it up and update library at the moment. If you are interested in making these modifications I would be more than happy to give you the code and walk you through it, otherwise it'll have to wait until I get some time to do it myself. If no one gets to it anytime soon, I would be glad to do this work for you. Another option might be to create a branch in osgOcean's SVN (clearly marked as work in progress) and commit the code you have there, and from there I can checkout that branch and work on it to improve it. We can then merge that branch back into the trunk once we're happy with it. A few options for you. Honestly I prefer the branch as it gives us lots of freedom, but it's up to you. J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] curl Plugun + OSG
Hi Danny, src lib include directory. As far as I understand, I need to add CURL_INCLUDE_DIR refers to libcurl\lib directory and CURL_LIBRAY refers to root of libcurl source directory? Seems to me CURL_INCLUDE_DIR should point to libcurl\include, and CURL_LIBRAY should be the filename of the curl library, something like libcurl\lib\curllib.lib (CURL_INCLUDE_DIR needs a directory, but CURL_LIBRAY needs a file). Hope this helps, J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Hi Gordon,
To me that seems a rather bad default to have for scaling on a DOF, I would
have assumed the default would be 1,1,1 not 0,0,0
That's bitten me a few times too. Specifically when I create DOFs
programmatically instead of reading an FLT file.
Is there a reason why its 0,0,0, and not 1,1,1 and should we change it
I think we could change it. Just need to beat the inertia of making such
a simple change and sending the whole modified file...
U...
Ok! Did it!
Uh, there are lots more uninitialized variables there... What should
_minScale, _maxScale, _minHPR, _maxHPR, _minTranslate, _maxTranslate be
set to? Fine, _currentTranslate and _currentHPR can be left at (0,0,0),
but are there better defaults for the min and max? Does the OpenFlight
spec give some appropriate defaults? And now that _currentScale is set
to (1,1,1), does it bother that it's not between _minScale and _maxScale
- which are both still at the default-constructed value of (0,0,0)?
I knew I shouldn't have opened the file to do the modification... :-)
J-S
--
__
Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com
http://www.cm-labs.com/
http://whitestar02.webhop.org/
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#include osgSim/DOFTransform
using namespace osgSim;
using namespace osg;
static const unsigned int TRANSLATION_X_LIMIT_BIT = 0x8000u 0;
static const unsigned int TRANSLATION_Y_LIMIT_BIT = 0x8000u 1;
static const unsigned int TRANSLATION_Z_LIMIT_BIT = 0x8000u 2;
static const unsigned int ROTATION_PITCH_LIMIT_BIT = 0x8000u 3;
static const unsigned int ROTATION_ROLL_LIMIT_BIT = 0x8000u 4;
static const unsigned int ROTATION_YAW_LIMIT_BIT = 0x8000u 5;
static const unsigned int SCALE_X_LIMIT_BIT= 0x8000u 6;
static const unsigned int SCALE_Y_LIMIT_BIT= 0x8000u 7;
static const unsigned int SCALE_Z_LIMIT_BIT= 0x8000u 8;
DOFTransform::DOFTransform():
_previousTraversalNumber(-1),
_previousTime(0.0),
_limitationFlags(0),
_animationOn(false),
_increasingFlags(0x),
_multOrder(PRH),
_currentScale(1.0f,1.0f,1.0f)
{
}
DOFTransform::DOFTransform(const DOFTransform dof, const osg::CopyOp copyop):
osg::Transform(dof, copyop),
_previousTraversalNumber(dof._previousTraversalNumber),
_previousTime(dof._previousTime),
_minHPR(dof._minHPR),
_maxHPR(dof._maxHPR),
_currentHPR(dof._currentHPR),
_incrementHPR(dof._incrementHPR),
_minTranslate(dof._minTranslate),
_maxTranslate(dof._maxTranslate),
_currentTranslate(dof._currentTranslate),
_incrementTranslate(dof._incrementTranslate),
_minScale(dof._minScale),
_maxScale(dof._maxScale),
_currentScale(dof._currentScale),
_incrementScale(dof._incrementScale),
_Put(dof._Put),
_inversePut(dof._inversePut),
_limitationFlags(dof._limitationFlags),
_animationOn(dof._animationOn),
_increasingFlags(dof._increasingFlags),
_multOrder(dof._multOrder)
{
if (_animationOn)
setNumChildrenRequiringUpdateTraversal(getNumChildrenRequiringUpdateTraversal()+1);
}
void DOFTransform::traverse(osg::NodeVisitor nv)
{
if (nv.getVisitorType()==osg::NodeVisitor::UPDATE_VISITOR)
{
// ensure that we do not operate on this node more than
// once during this traversal. This is an issue since node
// can be shared between multiple parents.
if ((nv.getTraversalNumber()!=_previousTraversalNumber)
nv.getFrameStamp())
{
double newTime = nv.getFrameStamp()-getSimulationTime();
animate((float)(newTime-_previousTime));
_previousTraversalNumber = nv.getTraversalNumber();
_previousTime = newTime;
}
}
Transform::traverse(nv);
}
bool DOFTransform::computeLocalToWorldMatrix(osg::Matrix
matrix,osg::NodeVisitor*) const
{
//put the PUT matrix first:
osg::Matrix l2w(getPutMatrix());
//now the current matrix:
osg::Matrix current;
current.makeTranslate(getCurrentTranslate());
//now create the local rotation:
if(_multOrder == PRH)
{
current.preMult(osg::Matrix::rotate(getCurrentHPR()[1], 1.0, 0.0,
0.0));//pitch
current.preMult(osg::Matrix::rotate(getCurrentHPR()[2], 0.0, 1.0,
Re: [osg-users] How to integrate OSG with java (to make an applet)
If you are interested in just Firefox windows plugin, I' m currently reworking the plugin used in VirtualRome project (www.virtualrome.it). An example of current development can be found at www.tinyurl.com/muvi3d If you want to test, suggest to use a separate empty profile, by running your Firefox with --profile your empty dir The problem with the old style plugin, was that it had instability and problem running on low end machines. I' m currently experimenting with an architecture that keep OSG related stuff in a separate process, like Google Earth plugin does. It seems more stable and able to work on smaller machines, still lacks javascript access. The code is currently not in good shape, but I was planning to releasing under LGPL Anyway, if someone is interested, I can share the repo (Bazaar based). Manuel Garea wrote: Ok, i'll try installing OSGVirtualPlanets Manuel -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21781#21781 ___ 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] Transforming nodes
HI J-S In Creator/OpenFlight, the defaults for all the DOF min's and max's are all 0's and the step values are all 0's and of course the scale current is set to 1,1,1 Creator has a DOF Viewer and when min, max are zero its ignores them it only animates if you have a (Min or Max) and Step set to something other than zero __ Gordon Tomlinson gor...@gordontomlinson.com IM: gordon3db...@3dscenegraph.com www.vis-sim.com www.gordontomlinson.com www.PhotographyByGordon.com __ -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jean-Sébastien Guay Sent: Tuesday, December 22, 2009 6:09 PM To: osg-users@lists.openscenegraph.org Cc: OpenSceneGraph Submissions Subject: Re: [osg-users] Transforming nodes Hi Gordon, To me that seems a rather bad default to have for scaling on a DOF, I would have assumed the default would be 1,1,1 not 0,0,0 That's bitten me a few times too. Specifically when I create DOFs programmatically instead of reading an FLT file. Is there a reason why its 0,0,0, and not 1,1,1 and should we change it I think we could change it. Just need to beat the inertia of making such a simple change and sending the whole modified file... U... Ok! Did it! Uh, there are lots more uninitialized variables there... What should _minScale, _maxScale, _minHPR, _maxHPR, _minTranslate, _maxTranslate be set to? Fine, _currentTranslate and _currentHPR can be left at (0,0,0), but are there better defaults for the min and max? Does the OpenFlight spec give some appropriate defaults? And now that _currentScale is set to (1,1,1), does it bother that it's not between _minScale and _maxScale - which are both still at the default-constructed value of (0,0,0)? I knew I shouldn't have opened the file to do the modification... :-) J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Precipitation Effect, Snow, bad rendering at slow speed
robertosfield wrote: Hi Massimo, Thanks for the pictures. Moving slow is a walking pace, not at 360km/h.. that's pretty fast in my book. The streaks are motion blurr on the particles as when you are moving fast the particle moves relative to the eye point between frames will be stretched out. [...] Thanks for the long answer, and sorry for my lack of precision about slow speed. ... -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21806#21806 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transforming nodes
Hi Gordon, In Creator/OpenFlight, the defaults for all the DOF min's and max's are all 0's and the step values are all 0's and of course the scale current is set to 1,1,1 OK then the values that are now set should be correct (since the default ctor for Vec3 sets it to (0,0,0) ). J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to set up the PageLOD?
Thanks! 2009/12/22 Robert Osfield robert.osfi...@gmail.com Hi Maxim, It sounds like the compilation of OpenGL objects is causing the frame drop. The new default for the DatabasePager is for the incremental pre compilation to be turned off, and for databases that are well balanced this doesn't cause problems with frame drops as the number of new objects per frame is kept modest so one doesn't get close to breaking frame when the new objects come in. For databases where there are lots of OpenGL objects that are introduced at once you can switch back on the incremental pre compile, the tells the DatabasePager to record all the OpenGL objects that need compiling and then on each frame compile as many as it can within specified time and number limits. The incremental compile reduces the overhead per frame so reduces the chances of breaking frame, however, it also increases the amount of time it takes to prepare a scene graph before it can be merged with the main databases - so there is higher latency between requesting a tile and when it's served up. To switch on the pre compile use: viewer.getDatabasePager()-setDoPreCompile(true); There is a whole suite of methods relating to the fine control of pre compile in the DatabasePager so have a look over the headers. The other thing you could do is improve the suitability of your databases so that it's better balanced - for instance switching between LOD levels shouldn't introduce so much geometry/textures at one time. Try to create a quad tree paged database where each tile is divided in four, and each child contains roughly the same amount of geometry and textures as it's parent. Such a well balanced database won't suddenly introduce lots of geometry and textures in one go. Robert. On Tue, Dec 22, 2009 at 4:20 PM, Maxim Gammer maxgam...@gmail.com wrote: Hi everybody, I've got a problem - FPS falls down from 100 to 2-3 for 1-2 seconds during first load of more detailed level of PageLODs (when they're first seen). We suppose it's because of object compilation (there are messages about textures loading etc. on the console). FPS also falls down when we look at newly loaded objects. Is it possible to compile objects prior to their rendering? How to set up the PageLOD? Or maybe there are other ways to solve that? -- Maxim Gammer ___ 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 -- Maxim Gammer ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OSG Build error on Mac OS X
Hi, I am trying to build OSG on Mac OS X Snow leopard using Xcode. I ran into the following build errors and I have no idea where to start solving them. Can anyone help: Code: Ld build/OpenSceneGraph.build/Development/osgdb_bsp.build/Objects-normal/i386/osgdb_bsp.so normal i386 cd /Users/vijay/Downloads/softwareDownloads/osgSvn2.8.2/Xcode/OpenSceneGraph setenv MACOSX_DEPLOYMENT_TARGET 10.4 /Developer/usr/bin/g++-4.2 -arch i386 -bundle -isysroot /Developer/SDKs/MacOSX10.5.sdk -L/Users/vijay/Downloads/softwareDownloads/osgSvn2.8.2/Xcode/OpenSceneGraph/build/Development -F/Users/vijay/Downloads/softwareDownloads/osgSvn2.8.2/Xcode/OpenSceneGraph/build/Development -F/Users/vijay/Library/Frameworks -F/Developer/SDKs/MacOSX10.5.sdk/Library/Frameworks -filelist /Users/vijay/Downloads/softwareDownloads/osgSvn2.8.2/Xcode/OpenSceneGraph/build/OpenSceneGraph.build/Development/osgdb_bsp.build/Objects-normal/i386/osgdb_bsp.LinkFileList -mmacosx-version-min=10.4 -framework OpenThreads -framework osg -framework osgDB -o /Users/vijay/Downloads/softwareDownloads/osgSvn2.8.2/Xcode/OpenSceneGraph/build/OpenSceneGraph.build/Development/osgdb_bsp.build/Objects-normal/i386/osgdb_bsp.so Undefined symbols: osgUtil::TriStripVisitor::stripify(), referenced from: bsp::VBSPGeometry::createGeometry() in osgdb_bsp.so-i386-master.o vtable for osgUtil::TriStripVisitor, referenced from: __ZTVN7osgUtil15TriStripVisitorE$non_lazy_ptr in osgdb_bsp.so-i386-master.o VTT for osgUtil::TriStripVisitor, referenced from: __ZTTN7osgUtil15TriStripVisitorE$non_lazy_ptr in osgdb_bsp.so-i386-master.o ld: symbol(s) not found collect2: ld returned 1 exit status Thank you! Cheers, Vijay [/code] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21808#21808 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] HUD-Problem
Hi, I need to use osg for a project, so i tried to modify the example HudsAndText from osg tutorial to my original project, but this didn't work out. i saw the graphics (a triangle), but no HUD. so i went back to the roots I tried this basic example osghud.cpp from osg hp examples but i don't work out at all. and i just copied everything to the project. no compiler errors, just a black screen. i included all necessary libraries and ressources (as far as i know). can someone please help me? how do i get it to work? ... Thank you! Cheers, Carl -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21784#21784 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Way to Draw Lots of spheres
Thanks for your input. I tried sprites and they appear to do the job I need. Thanks again! Cheers, Clayton -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21800#21800 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Picking individual triangles from within a loaded model
Hi, I have loaded the cow.osg model into the OSG viewer with osgDB::readNodeFile( cow.osg ) and displayed it in wireframe mode. I want to delete or pick individual triangles from within the mesh of the wire framed cow. Does anyone have any examples that can do this? Thank you for any help. Cheers, JC -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=21708#21708 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Simple water effects
Hi Kim thanks for your feedback. First of all my time is rare at the moment, we are doing our thesis and on the other hand I think you need a pro for the integration of the changes into osgOcean ;-) Regards Dominic Kim Bale schrieb: Hello All, Did somebody mention water effects?! I have recognised the CPU usage of osgOcean as a bit of a problem. This is due to the osgOcean using one huge vertex/normal array for all of the ocean tiles and then copying the vertices for each tile in on frame/position changes. It was a rather bad design decision which once I had committed to proved too time consuming to change. However, due to the tillable nature of the FFT ocean surface, this isn't necessary. A little while ago I wrote some test cases which removed this huge vertex array and replaced it with a single high resolution ocean tile which is then instanced for each tile in the ocean surface. The different resolution tiles are then supported simply by modifying the primitives and positioning the tiles using a vertex shader. Since all of the high resolution tiles are precomputed, updating the animation of the ocean surface is simply a matter of changing the pointer to the next frames vertex array for each of the tile primitives. This is a far more efficient method of updating the surface, particularly if you are using a very large surface. I have the code for all of this as a prototype, but I don't have the time to tidy it up and update library at the moment. If you are interested in making these modifications I would be more than happy to give you the code and walk you through it, otherwise it'll have to wait until I get some time to do it myself. Regards, Kim. 2009/12/22 Robert Osfield robert.osfi...@gmail.com mailto:robert.osfi...@gmail.com Hi Dominic, On Mon, Dec 21, 2009 at 8:43 PM, Dominic Stalder dominic.stal...@bluewin.ch mailto:dominic.stal...@bluewin.ch wrote: I know the amazing looking osgOcean, but for our game it uses to much CPU. Might I suggest you engage with the authors/contributors of osgOcean and find a way of avoiding this overhead. This almost certainly will take less time to realize a final solution and will be of benefit to all osgOcean users. Cheers, Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org mailto: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] How to get average frame rate after some amount of running time?
Dear Robert,
Thank for your answer. One more question. Right now I have my code like this:
numOfFrame = 0;
startTime = time(NULL);
while (!viewer.done())
{
viewer.frame();
numOfFrame ++;
}
endTime = time(NULL);
frameRate = (double)numOfFrame/(endTime - startTime);
But it always gives me about 60fps. Did I make a mistake somehow?
(startTime and endTime are in seconds already)
Thanks,
Dat
On Mon, Dec 21, 2009 at 3:17 AM, Robert Osfield
robert.osfi...@gmail.com wrote:
Hi Dat,
On Sun, Dec 20, 2009 at 8:26 PM, Nguyen Tien Dat tienda...@gmail.com wrote:
Dear all,
Could you tell me a way to get the average frame rate after, for
example, 1 minute of running?
The OSG itself doesn't give you this but it gives you all the tools to
do it. You have an osg::Timer for the time, and your have control
over the frame loop so you can count the frames - so you can just do
it yourselves for all th timings. There is even an FrameStam
viewer.getFrameStamp() that gives you the ReferenceTime and
FrameNumber, see include/osg/FrameStamp for further details, if you
just want to use the OSG built in timing/frame counting.
All is left is a programming question... how do you computer averages
over a specified period. This is something I would expect most
computer graphics programmers to be able to do.
Robert.
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--
Dat Tien Nguyen
PhD student, Computer Science Department
The University of Iowa, IA 52242
http://cs.uiowa.edu/~tinguyen
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Re: [osg-users] HUD-Problem
2009/12/22 Carl Johnson uto...@gmx.net Hi, I need to use osg for a project, so i tried to modify the example HudsAndText from osg tutorial to my original project, but this didn't work out. i saw the graphics (a triangle), but no HUD. so i went back to the roots I tried this basic example osghud.cpp from osg hp examples but i don't work out at all. and i just copied everything to the project. no compiler errors, just a black screen. i included all necessary libraries and ressources (as far as i know). I've only seen a black screen when the initial window size is setup incorrectly. Check what sizes you are passing in to the window traits. If that doesn't work, you'll need to post your code; it's a bit hard to guess with so little information. -- http://www.ssTk.co.uk ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] HUD-Problem
I have seen the black screen on windows7 so I had to reactivate the window with CTRL-TAB Nick http://www.linkedin.com/in/tnick On Wed, Dec 23, 2009 at 2:00 AM, Simon Hammett s.d.hamm...@googlemail.comwrote: 2009/12/22 Carl Johnson uto...@gmx.net Hi, I need to use osg for a project, so i tried to modify the example HudsAndText from osg tutorial to my original project, but this didn't work out. i saw the graphics (a triangle), but no HUD. so i went back to the roots I tried this basic example osghud.cpp from osg hp examples but i don't work out at all. and i just copied everything to the project. no compiler errors, just a black screen. i included all necessary libraries and ressources (as far as i know). I've only seen a black screen when the initial window size is setup incorrectly. Check what sizes you are passing in to the window traits. If that doesn't work, you'll need to post your code; it's a bit hard to guess with so little information. -- http://www.ssTk.co.uk ___ 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
