date:20130918

Re: [osg-users] reflection / refraction clip plane

2013-09-18 Thread Daniel Schmid

Hi all

Here comes my follow up. As you can see in the code snipped above, the clipping 
plane of the refraction  camera is looking in the opposite direction. Since the 
clipping is done on the graphics card, and the primitives are still in world 
coordinates, the refraction clipping plane has to be multiplied with the 
transposed camera matrix.


Code:

// this is what happens in cull:
  osg::Matrixd l_ViewMatrix  = l_MainCamera-getViewMatrix();
  osg::Matrixd l_ProjMatrix  = l_MainCamera-getProjectionMatrix();

  osg::Vec4d l_PlaneNormalCoeff(0.0, 0.0, -1.0, -m_Height);

  osg::Matrixd l_CameraMatrix = l_ViewMatrix * l_ProjMatrix;
  osg::Matrixd l_InvCameraMatrix = osg::Matrixd::inverse(l_CameraMatrix);

  double* l_MV = l_InvCameraMatrix.ptr();

  osg::Matrixd l_InvCameraMatrixTransposed;
  l_InvCameraMatrixTransposed.set(
  l_MV[0], l_MV[4], l_MV[8], l_MV[12],
  l_MV[1], l_MV[5], l_MV[9], l_MV[13],
  l_MV[2], l_MV[5], l_MV[10], l_MV[14],
  l_MV[3], l_MV[6], l_MV[11], l_MV[15]
  );

  l_PlaneNormalCoeff = l_InvCameraMatrixTransposed * l_PlaneNormalCoeff;

  m_RefractionClipPlane-setClipPlane(l_PlaneNormalCoeff);




The problem I encounter is the following. All the stuff doesn't have any 
effect. The fact of setting a new Clip Plane in the RefractionClipPlane object 
doens't do anything.

So I end up having a clip plane for the reflection camera and a clip plane for 
the refraction camera with both show into opposite directions . According to 
the theory, this should work...

I read something about Positional State attribute and that there are issues 
when setting multiple clipping planes. I don't get the point there, and maybe 
need some more insight (say explanation). I thought by having two distinct 
render cameras, they should be able to have their own clipping planes?

Regards
Daniel

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Re: [osg-users] Crash when loading a model

2013-09-18 Thread Kevin Virmani


robertosfield wrote:
 
 
 You used Windows :-)
 


True but it is needed ;)
 


robertosfield wrote:
 
 Seriously, though it could well be a VisualStudio build and linkage issue, 
 check that you built your application with all the same settings as the OSG 
 was built as this is a very common gotcha with VisualStudio - it can't mix 
 different types of libs such as debug/release etc.
 


That was the problem. Compiled in Debug and used Release libs. Thanks everyone.

Kevin

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Re: [osg-users] question about CUDA with OSG

2013-09-18 Thread Sebastian Messerschmidt


Hi Kim,

Since you are not telling us what a Big Size of Terrain actually 
means, we cannot see where the problem lies.
Usually this is due to a poor structure of the scene graph, missing 
LODs, etc.
It also could be shader bound, e.g. your fragment shaders/tesselation 
shaders are simply doing too much.


CUDA can help with mathematically problems that can be solved using 
parallel algorithms. But usually it won't help with rendering performance.
There are some cases where it might help. For instance when your 
rendering is CPU bound in a way that you have to do a lot of 
computations before you can actually render the scene.
So improving the performance is a vague term, as you don't provide more 
information on where your bottleneck lies.


cheers
Sebastian


Hi,

First of all I am not familiar with Osg and CUDA

I implemented fIight simulation program with osg
but If I use big Size of Terrain, The performance(fame rate) of application is 
not good

So I wanna try to apply CUDA to my osg application for improving the performance

So what do u guys think about it?
Is it possible to improve the performance With Cuda?
and could u let me know How to implement to my osg application?

Thank you so much in advance  for any help :)

Cheers,
Kim

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Re: [osg-users] error happened when I use opengl in osg (Robert Osfield)

2013-09-18 Thread 小风子

thanks,I will have a try ,I want to use opengl in osg just because someone has 
impliment the function I need,if I can not do so ,I will try the convert the 
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Re: [osg-users] question about CUDA with OSG

2013-09-18 Thread Carlos Reig Matut

Hi Kim,

I agree with Sebastian. However, if you are still interested in use CUDA in
an OSG application, you can explore osgCompute library (
http://www.basementmaik.com/doc/osgcompute/html/). In addition, in the
osgCompute webpage you can find
http://www.cg.informatik.uni-siegen.de/data/Publications/2009/orthmann09osgcompute.pdf.
Maybe it is useful in order to give you a general idea.

Cheers,
Carlos

On 18 September 2013 08:43, Sebastian Messerschmidt
sebastian.messerschm...@gmx.de wrote:

Hi Kim,

Since you are not telling us what a Big Size of Terrain actually means,
we cannot see where the problem lies.
Usually this is due to a poor structure of the scene graph, missing LODs,
etc.
It also could be shader bound, e.g. your fragment shaders/tesselation
shaders are simply doing too much.

CUDA can help with mathematically problems that can be solved using
parallel algorithms. But usually it won't help with rendering performance.
There are some cases where it might help. For instance when your rendering
is CPU bound in a way that you have to do a lot of computations before you
can actually render the scene.
So improving the performance is a vague term, as you don't provide more
information on where your bottleneck lies.

cheers
Sebastian

Hi,

First of all I am not familiar with Osg and CUDA

I implemented fIight simulation program with osg
but If I use big Size of Terrain, The performance(fame rate) of
application is not good

So I wanna try to apply CUDA to my osg application for improving the
performance

So what do u guys think about it?
Is it possible to improve the performance With Cuda?
and could u let me know How to implement to my osg application?

Thank you so much in advance for any help :)

Cheers,
Kim

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Carlos Reig Matut
LSyM - Instituto IRTIC
Universidad de Valencia

Ph. +34 96 354 3639 -- ext. 43639
http://irtic.uv.es/lsym
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Re: [osg-users] reflection / refraction clip plane

2013-09-18 Thread Robert Osfield

Hi Daniel,

I'm afraid I don't have any ideas to what might be amiss.

In terms of clip plans/position state and how many clip planes you can have
active at any one time, I can provide some clarity.

For each osg::Camera that isn't set up as a nested render the OSG's
rendering backend sets up a RenderStage per Camera.  Each RenderStage has
it's own list of positional state (clip planes, eye linear texgen, lights)
that it applies with a single modelview matrix prior to the rendering the
main of the contents of the RenderStage.  This means each Camera can use
it's own GL_CLIP_PLANE0. GL_CLIP_PLANE1 etc without it's result interfering
with other Camera's RenderStage.

Robert.


On 18 September 2013 07:10, Daniel Schmid daniel.sch...@swiss-simtec.chwrote:

 Hi all

 Here comes my follow up. As you can see in the code snipped above, the
 clipping plane of the refraction  camera is looking in the opposite
 direction. Since the clipping is done on the graphics card, and the
 primitives are still in world coordinates, the refraction clipping plane
 has to be multiplied with the transposed camera matrix.


 Code:

 // this is what happens in cull:
   osg::Matrixd l_ViewMatrix  = l_MainCamera-getViewMatrix();
   osg::Matrixd l_ProjMatrix  = l_MainCamera-getProjectionMatrix();

   osg::Vec4d l_PlaneNormalCoeff(0.0, 0.0, -1.0, -m_Height);

   osg::Matrixd l_CameraMatrix = l_ViewMatrix * l_ProjMatrix;
   osg::Matrixd l_InvCameraMatrix = osg::Matrixd::inverse(l_CameraMatrix);

   double* l_MV = l_InvCameraMatrix.ptr();

   osg::Matrixd l_InvCameraMatrixTransposed;
   l_InvCameraMatrixTransposed.set(
   l_MV[0], l_MV[4], l_MV[8], l_MV[12],
   l_MV[1], l_MV[5], l_MV[9], l_MV[13],
   l_MV[2], l_MV[5], l_MV[10], l_MV[14],
   l_MV[3], l_MV[6], l_MV[11], l_MV[15]
   );

   l_PlaneNormalCoeff = l_InvCameraMatrixTransposed * l_PlaneNormalCoeff;

   m_RefractionClipPlane-setClipPlane(l_PlaneNormalCoeff);




 The problem I encounter is the following. All the stuff doesn't have any
 effect. The fact of setting a new Clip Plane in the RefractionClipPlane
 object doens't do anything.

 So I end up having a clip plane for the reflection camera and a clip plane
 for the refraction camera with both show into opposite directions .
 According to the theory, this should work...

 I read something about Positional State attribute and that there are
 issues when setting multiple clipping planes. I don't get the point there,
 and maybe need some more insight (say explanation). I thought by having two
 distinct render cameras, they should be able to have their own clipping
 planes?

 Regards
 Daniel

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Re: [osg-users] osg+osm

2013-09-18 Thread Jason Beverage

You should take a look at osgEarth (http://osgearth.org).  If you are just
looking to rasterize the OSM and overlay it on some terrain you can use
something like MapServer or GeoServer to do the rasterization and expose it
as a WMS service that osgEarth can access.  You can also use MapBox.com to
generate rasterized OSM maps and access them in osgEarth.

If you need access to the raw vector data from OSM you also might be able
to use the pbf files directly in osgEarth if you use GDAL 1.10, it looks
like it has an OGR driver for it (http://www.gdal.org/ogr/drv_osm.html).
 If that works then you can use the OGR driver for osgEarth and apply any
styling you want from simple vector rendering to extrusion of building
polygons.

Jason


On Tue, Sep 17, 2013 at 3:40 PM, Preet prismatic.proj...@gmail.com wrote:

 On Tue, Sep 17, 2013 at 11:09 AM, Айдар Ильдарович e...@inbox.ru wrote:
  Hello!
  I use OpenSceneGraph 3.0.1 in my research.
  Please, help me, how to use and to load files of OpenStreetMap (extension
  o5m, pbf, osm) in osgviewer.

 You can't do this directly. The files have to be opened and parsed
 using another library and then you need to decide how to set up your
 scene graph based on your needs. How would OpenSceneGraph know what
 you want to do with an OpenStreetMap node or way and other such
 elements?
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Re: [osg-users] reflection / refraction clip plane

2013-09-18 Thread Marcel Pursche

Hello Daniel,

what kind of graphics card are you using? ATI/AMD? And are you using a vertex 
shader for your terrain? I had a similiar problem with reflections in osgOcean.
The solution was to add the line gl_ClipVertex = gl_ModelViewMatrix * 
gl_Vertex; to my vertex shader. On nVidia cards this line seems to be added 
automatically if it is missing.

Thank you!

Cheers,
Marcel

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Re: [osg-users] reflection / refraction clip plane

2013-09-18 Thread Daniel Schmid

Hi all

I was unsuccesful with the ClipPlanes, so I decided to write a Vertex/Fragment 
Shader pair that handles the clipping by doing a fragment abort upon testing 
the vertex world height with a clipping height uniform.

Like this I was finally able get the control I wanted.

Thank you!

Cheers,
Daniel

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[osg-users] Flexibility of osgPango vs osgText

2013-09-18 Thread Eric Sokolowsky

Hello all,

Until now I have been using osgText for rendering text to the screen, which
has been working fairly well for the most part. However, I have found that
I need more sophisticated text rendering, such as having certain words in
bold or italicized that are in line with the regular text. Is this possible
to do with the baseline osgText? Will osgPango do this better/easier? I
want to be able to measure the pixel size of text rendering after I
generate it, so I can make it bigger or smaller to fit the area of the
screen I'm targeting. I'm using the SourceSansPro series of fonts in my
application, and there are different font files for each style (Italics,
Bold, etc.)

Thanks for any direction you can provide.

Eric
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[osg-users] Graphics Context and Window Handle

2013-09-18 Thread Sajjadul Islam

Hi forum, 

I think Graphics Context actually encapsulates information on the way in which 
scene objects are drawn and rendering states are applied. OSG uses the 
osg::GraphicsContext class to represent the abstract graphics context. 

In one of the functions that i am writing now, takes a osg::GraphicsContext 
class object as parameter and from this i need to derive a OS specific window 
handle and i am not sure how to do it. I did not find any example to it either. 

Right now i am doing it in the following manner and i think it is not correct. 


Code:


#ifdef _WIN32
#include osgViewer/api/Win32/GraphicsHandleWin32
#elif defined(__GNUC__)
#include osgViewer/api/X11/GraphicsHandleX11
#elif defined( __APPLE__)
#include osgViewer/api/Carbon/GraphicsHandleCarbon
#endif
..
..

bool Context::setupDeviceAndContext(osg::GraphicsContext ctx)
{
...
#ifdef defined(_WIN32)
  osgViewer::GraphicsHandleWin32 *windowsContext = NULL;
#elif defined( __GNUC__)
  osgViewer::GraphicsHandleX11 *linuxContext = NULL;
#elif defined( __APPLE__ )
  osgViewer::GraphicsHandleCarbon *osxContext = NULL;
#endif

  //platform dependent casting for the OpenCL context creation
#ifdef defined(_WIN32)
  windowsContext = dynamic_castosgViewer::GraphicsHandleWin32*(ctx);

  if(NULL == windowsContext)
  {
 osg::notify(osg::FATAL)  Win32 Graphics Context Casting is 
unsuccessful  std::endl;
 return false;
  }
#elif defined(__GNUC__)
  linuxContext = dynamic_castosgViewer::GraphicsHandleX11*(ctx);

  if(NULL == linuxContext)
  {
 osg::notify(osg::FATAL)  X11 Graphics Context Casting is unsuccessful 
 std::endl;
 return false;
  }
#elif defined(__APPLE__)
  osxContext = dynamic_castosgViewer::GraphicsHandleCarbon*(ctx);

  if(NULL == osxContext)
  {
 osg::notify(osg::FATAL)  MACOSX Graphics Context Casting is 
unsuccessful.   std::endl;
 return false;
  }
#endif

}




.
I need this OS specific Window Handle to create a context property for OpenCL 
device as follows:


Code:

 cl_context_properties contextProperties[] =
{
#ifdef defined(_WIN32)
   CL_CONTEXT_PLATFORM, (cl_context_properties) _m_clPlatform,
   CL_GL_CONTEXT_KHR, (cl_context_properties) 
windowsContext-getWGLContext(),
   CL_WGL_HDC_KHR, (cl_context_properties) windowsContext-getHDC(),
#elif defined(__GNUC__)
   CL_CONTEXT_PLATFORM, (cl_context_properties) _m_clPlatform,
   CL_GL_CONTEXT_KHR, (cl_context_properties) 
linuxContext-getContext(),
   CL_GLX_DISPLAY_KHR, (cl_context_properties) 
linuxContext-getDisplay(),
#elif defined(__APPLE__)
   CGLContextObj glContext = CGLGetCurrentContext(); // get the current 
GL context
   CGLShareGroupObj shareGroup = CGLGetShareGroup(glContext); // share 
group

   CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE,
   (cl_context_properties) shareGroup,
#endif
   0
};





You do not need to worry about the OpenCL stuff here. I just need to know how 
to derive OS specific window handles from osg::GraphicsContext ?

Is it the proper way to do it as i am doing right now ? I am having trouble in 
this manner because OpenCL context creation is giving me undefined behavior. 

If i  am correct , then i have to concentrate some where else in the code.

I really need your hint over this issue.
 

Cheers,
Sajjadul

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Re: [osg-users] reflection / refraction clip plane

Re: [osg-users] Crash when loading a model

Re: [osg-users] question about CUDA with OSG

Re: [osg-users] error happened when I use opengl in osg (Robert Osfield)

Re: [osg-users] question about CUDA with OSG

Re: [osg-users] reflection / refraction clip plane

Re: [osg-users] osg+osm

Re: [osg-users] reflection / refraction clip plane

Re: [osg-users] reflection / refraction clip plane

[osg-users] Flexibility of osgPango vs osgText

[osg-users] Graphics Context and Window Handle

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