Re: [osg-users] How to make OSG support very large Pixels images(For Map Texture)?
2011/8/29 xyc508 > Hi,osger all, > > Who can tell how much Pixel most for .jpg can OSG support? > I have a 5405X5634 Pixel .JPG File,but OSG can't read it(For Map Texture), > How to make OSG support very large Pixels images? > Thanks ahead. > > Hello, I am quite sure that you wouldn't be able to use such large texture anyway - most hardware allows textures 4096x4096 maximum. You have to split it up and use some paging approach, loading only tiles as they are needed. Jan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Who can tell how much Pixel most for .jpg can OSG support?
Hi Donlin, > Who can tell how much Pixel most for .jpg can OSG support? it depends on your graphics card see http://vterrain.org/LargeTextures/ ( btw vterrain uses OSG ) note - while OSG can resize large textures - textures ( not texture rectangles ) are of power of 2, so be sureto resize it before hand Regards Sergey > > Cheers, > Donlin > > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Uniform array naming problem
Hi,
Instead of trimming [0] from the name, as previously suggested, we should
detect if a uniform name has it, but add BOTH 'name[0]' and 'name' into
Program::_uniformInfoMap, so that when the osg::Uniform are applied, there will
be a name match for whatever the driver returns... Both are actually valid.
The fix I have applied in my osg version, in
void Program::PerContextProgram::linkProgram(osg::State& state)
// For some drivers, active uniform array names are returned as 'name', and for
others, 'name[0]'
// The way OSG works is to lookup into the program's active uniforms to see if
a uniform set in a StateSet
// is present, and apply it only in that case. But that mechanic fails if the
active uniform name
// includes the backets, but not the other, and vice-versa. So add both into
the _uniformInfoMap
// to fix this, as both names are valid and allowed by OpenGL specifications
std::string strName(name);
if(strName.length() > 3 && strName.substr(strName.length()-3, 3) ==
std::string("[0]"))
_uniformInfoMap[strName.substr(0, strName.length()-3)] =
ActiveVarInfo(loc,type,size);
Thank you!
Cheers,
Philippe
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Re: [osg-users] Who can tell how much Pixel most for .jpg can OSG support?
On Mon, Aug 29, 2011 at 3:14 PM, Sergey Kurdakov wrote: > note - while OSG can resize large textures - textures ( not texture > rectangles ) are of power of 2, so be sureto resize it before hand Small note, the osg::Texture2D will resize non power of two textures by default, but you can disable this where your hardware + drivers support non power of two textures. Just set do: texture->setResizeNonPowerOfTwoHint(false); Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Drawing a simple sphere...
Hi Yann, I have tried your code with osg trunk under Windows 7 32bit and can report that it does not crash. All I can suggest is to replace use of native pointers with osg::ref_ptr. So for example: Code: osg::Geode * geode = new osg::Geode(); becomes Code: osg::ref_ptr< Geode > geode = new osg::Geode(); Cheers, -Tony -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=42293#42293 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] How to force reloading the texture in the shader
Hello to All,
I'm having a very specific issue using OpenSceneGraph. While using a texture
shader I developped, I need to attach a texture to my object. But my texture
need to be changed at each frame. However, I noticed that my texture is not
updated in the next viewer.update() if my computer is very fast. If I slow down
my computer it is correctly synchronized.
In other word, I'm looking for a way to way for a texture object to be
propagated in the gpu buffer before rendering the frame.
As I'm using OpenSceneGraph for simulation purpose even 1 frame offset is not
acceptable for me.
Basically the code can be summed up this way:
Code:
osg::Image IMAGE;
IMAGE->setImage(..., imageData, osg::Image::AllocationMode::NO_DELETE);
osg::StateSet *mystate = new osg::StateSet();
osg::Texture2D *texture = new osg::Texture2D();
texture->setImage(IMAGE);
(...)
for(int i=0;idone();++i)
{
IMAGE->setImage(..., ImageData[i], osg::Image::AllocationMode::NO_DELETE);
viewer->frame(ctime);
}
In this example when rendering the scene OSG sometimes uses the ImageData of
index i-1 instead of index i
If anyone can help me I would be very happy.
Regards.
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Re: [osg-users] Autoshadow aliasing in shadow maps
Hi, Justo All shadowmapping techniques have problems with such aliasing problems. You can try use shadow volumes technique as it dont suffer from this problem and generates correct shadows in any case, but it have other drawbacks. IIRC this algo also implemented in osgShadows. Cheers, Sergey. 25.08.2011, 22:12, "Justo Ureña" : > Hi, > > I´m testing diferent shadows techniques for my scene, and after some adjusts, > I got them working fine... Except for very big aliasing that appears in some > surfaces that are parallel to the light direction. It happens in all the > shadow maps techniques (ShadowMap, StandardShadowMap, LISPSM)... and I´ve > tried all the things that I could imagine to get rid of them without > success... Please, anyone can help me with that? > > From my investigation I got that the problem is that the depth map calculated > by the shadow camera does not fit exactly with the curved shape in the scene. > In the attachment you can see a render of the scene (that only includes the > cessna and a vertical directional light that produces the shadow) coloured > with the depth map. As you can see, in the laterals of the cessna appear > these withe stiches that means that the depth calculated in these texels of > the map is infinite, what is obviously wrong. There is any way to avoid this > annoying effect? > > Thank you very much! > > Cheers, > Justo > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=42241#42241 > > ___ > 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 force reloading the texture in the shader
Hi, Fred
Try setting singlethreaded threading model to viewer
(viewer->setThreadingModel(osgViewer::ViewerBase::SingleThreaded)) or setting
texture data variance to dynamic
(texture->setDataVariance(osg::Object::DYNAMIC))
Cheers,
Sergey.
30.08.2011, 01:32, "Fred Maulir" :
> Hello to All,
>
> I'm having a very specific issue using OpenSceneGraph. While using a texture
> shader I developped, I need to attach a texture to my object. But my texture
> need to be changed at each frame. However, I noticed that my texture is not
> updated in the next viewer.update() if my computer is very fast. If I slow
> down my computer it is correctly synchronized.
>
> In other word, I'm looking for a way to way for a texture object to be
> propagated in the gpu buffer before rendering the frame.
>
> As I'm using OpenSceneGraph for simulation purpose even 1 frame offset is not
> acceptable for me.
>
> Basically the code can be summed up this way:
>
> Code:
>
> osg::Image IMAGE;
> IMAGE->setImage(..., imageData, osg::Image::AllocationMode::NO_DELETE);
>
> osg::StateSet *mystate = new osg::StateSet();
> osg::Texture2D *texture = new osg::Texture2D();
> texture->setImage(IMAGE);
>
> (...)
>
> for(int i=0;idone();++i)
> {
> IMAGE->setImage(..., ImageData[i], osg::Image::AllocationMode::NO_DELETE);
>
> viewer->frame(ctime);
> }
>
> In this example when rendering the scene OSG sometimes uses the ImageData of
> index i-1 instead of index i
>
> If anyone can help me I would be very happy.
> Regards.
>
> --
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=42294#42294
>
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[osg-users] How can I get the vertices of an .obj or how can I draw a geometry in OSG with a vertices array?
Hi, I am new on all this stuff. So, I apologize if my questions are so simple. I am working in visual studio 2008 and OSG. In my scene, I load some .obj files and I want to detect collision between them. I want to retrieve the vertices of my .obj geometry to star working with them. does anybody know how can I do this? or have an advice? Thank you! Cheers, Jose -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=42297#42297 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] When ref_ptrs get deleted
Hi, I was having memory issues with my OSG scene. I was calling removeChild() but didn't appear to be getting my memory back. In my application, I frequently add and remove large texture mapped geometries. In particular, after one operation I might remove about 125 geometries with 3 vertices and a similar number of TRIANGLES, and replace them with new ones. I was running out of memory when doing this, even though I can easily add more than 300 such objects from scratch. My solution was Code: _gw = new osgViewer::GraphicsWindowEmbedded(...); osg::DeleteHandler* dh = new osg::DeleteHandler; _gw->setDeleteHandler(dh); // ... later after adding and removing objects... dh->flush() First, is this a standard way to force objects to be deleted? Second, is there a better way? Third, hopefully this will be useful to someone in the future faced with the same issue. Cheers, Doug -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=42266#42266 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How can I get the vertices of an .obj or how can I draw a geometry in OSG with a vertices array?
Hi Jose, Use node visitor to find all child geodes of the newly loaded node. And they convert the drawables of each geode to osg::Geometry object with a dynamic_cast<>. If the conversion successes, you may obtain the vertices and primitive sets simply from Geometry's APIs. Cheers, Wang Rui 2011/8/30 Jose Navarro : > Hi, > > I am new on all this stuff. So, I apologize if my questions are so simple. > > I am working in visual studio 2008 and OSG. In my scene, I load some .obj > files and I want to detect collision between them. I want to retrieve the > vertices of my .obj geometry to star working with them. does anybody know how > can I do this? or have an advice? > > > Thank you! > > Cheers, > Jose > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=42297#42297 > > > > > > ___ > 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] When ref_ptrs get deleted
On 8/26/2011 11:18 AM, David Benoit wrote: Hi, I was having memory issues with my OSG scene. I was calling removeChild() but didn't appear to be getting my memory back. When you call removeChild(), Referenced::unref() should get called. You should be able to set a breakpoint there to see whether the reference count dropped to zero (I suspect it didn't, indicating the memory was either referenced by another ref_ptr somewhere, or you had explicitly called ref() ). Also note that some memory management systems don't free memory back to the system, they free it back to the process. If memory is being freed to the process, process size doesn't shrink when memory is deallocated. This is not an OSG issue, but I mention it here because your post doesn't say how you reached the conclusion that your app was leaking memory. There have been countless threads discussing OSG memory usage in this mailing list over the years. I imagine a good search of the archives might shed some light on the issue you encountered. -Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How can I get the vertices of an .obj or how can I draw a geometry in OSG with a vertices array?
On 8/29/2011 4:28 PM, Jose Navarro wrote: Hi, I am new on all this stuff. So, I apologize if my questions are so simple. I am working in visual studio 2008 and OSG. In my scene, I load some .obj files and I want to detect collision between them. I want to retrieve the vertices of my .obj geometry to star working with them. does anybody know how can I do this? or have an advice? If you use osgBullet.googlecode.com, you can convert your scene graph directly to a Bullet collision shape and use Bullet to perform collision detection. In this case, you wouldn't need to access the vertices directly. Even if you don't want to use Bullet for collision detection, the osgBullet project contains the CollectVerticesVisitor, which collects a set of transformed vertices from a scene graph. You might find this code useful. -Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to force reloading the texture in the shader
Sergey. Thanks really A LOT for your fast and VERY EFFICIENT help. This problem drove me crazy for a while. The setting texture->setDataVariance(osg::Object::DYNAMIC) did not help but the viewer->setThreadingModel(osgViewer::ViewerBase::SingleThreaded) worked very well. Thanks again for your help. Regards. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=42301#42301 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
