Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Clement, On 5 March 2012 03:04, clement@csiro.au wrote: My program was using coin3D for volume rendering before. Now it is replaced with osg, but I still want the existing machine is able to run osg version. Last time you mentioned it is possible to implement a crude 3D volume rendering based on 2D textures. Can you tell me more in details how to do? Do you mean the current osg doesn't have this feature? Is it required to modify the source code and recompile again? Thanks. I am not about to complicate osgVolume with backwards compatibility to hardware that can't do volume rendering properly so this will be something you'll have to implement at your end. The way to do volume rendering with 2D textures is very limited but possible - you need to create a stack of 2D images that build up the volume, and then render a each of images as a 2D texture assigned to an axis aligned quad, building up the image from back to front. To handle viewing from all angles you'll need to create three sets of 2D images, one for each axis so as you rotate around the volume you can select the most closely aligned axis. This will use more memory than using proper 3D textures, and it'll be far less flexible as you won't be able to compute normal on the GPU or do any decent shader operations. The final product of you work will be compatibility but on as far as the lowest common denominator - i..e. really crude low res volumes. Alternatively you could spend a small amount of money on a graphics card for your systems that is capable of doing volume rendering. Even a low end ATI or NVidia card will be able to do volume rendering - it'll be slow, but still way faster than the Intel graphics and way higher visual quality. You'll save lots of time - you'll only need to save a couple of hours work to break even on the purchase of the graphics card - in fact I have little doubt that you've already wasted far more time and money trying to get by with crappy hardware that isn't up to the job. As for Coin3D doing it, well it's implementation of volume rendering is not too advanced - it's stuck at the lowest common denominator level that you really should be expecting to exceed these days. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Robert, My program was using coin3D for volume rendering before. Now it is replaced with osg, but I still want the existing machine is able to run osg version. Last time you mentioned it is possible to implement a crude 3D volume rendering based on 2D textures. Can you tell me more in details how to do? Do you mean the current osg doesn't have this feature? Is it required to modify the source code and recompile again? Thanks. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Friday, 2 March 2012 8:24 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgVolume RayTracedTechnique problem Hi Clement, On 2 March 2012 04:12, clement@csiro.au wrote: The graphic details of this machine is Intel Q35 Express Chipset. Is osgVolume not support this chipset? I'm rather surprised that you'd even attempt volume rendering on such in capble hardware. Volume rendering is one of most challenging tasks for any graphics card to handle, it tougher than *any* game available, it pushes the memory bandwidth and capacity to the limit, it can brings high end hardware to it knees. Yet you are trying to get things working on crappy Intel embedded graphics and virtual machine. You really need to reset your expectations. Volume rendering requires decent graphics hardware. Is not the osgVolume doesn't support crappy graphics, it's that crappy graphics doesn't support volume rendering. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Clement, On 2 March 2012 00:47, clement@csiro.au wrote: I have updated the driver on one of machines. The 3D texture message is gone, but I got other message. Warning: Could not find plugin to read objects from file shaders/volume.vert. Warning: Could not find plugin to read objects from file shaders/volume.frag. This would suggest that you plugins aren't on the search path that your application is using. Locator::computeLocalBounds Scaling image from (350,350) to (128,128) Error Image::scaleImage() do not succeed : scaling of volumes not implemented. Scaling image from (350,350) to (128,128) Error Image::scaleImage() do not succeed : scaling of volumes not implemented. Any idea what is it? Thank you for your help again. I would seem that the max 3D texture size is just 128x128 which is pretty hopeless. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Clement, On 2 March 2012 04:12, clement@csiro.au wrote: The graphic details of this machine is Intel Q35 Express Chipset. Is osgVolume not support this chipset? I'm rather surprised that you'd even attempt volume rendering on such in capble hardware. Volume rendering is one of most challenging tasks for any graphics card to handle, it tougher than *any* game available, it pushes the memory bandwidth and capacity to the limit, it can brings high end hardware to it knees. Yet you are trying to get things working on crappy Intel embedded graphics and virtual machine. You really need to reset your expectations. Volume rendering requires decent graphics hardware. Is not the osgVolume doesn't support crappy graphics, it's that crappy graphics doesn't support volume rendering. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Clement, On 29 February 2012 14:26, clement@csiro.au wrote: My program is set to use RayTracedTechnique for display voxel. I tested the same program on windows XP and windows 7 machines. Only windows 7 machine can display the image properly. In windows XP, it shows the cube filled with white colour. I found out the problem is related to RayTracedTechnique. Any one got similar problem? How to fix this? Many thanks. This is most likely to be an error in the OpenGL driver, unless your hardware is dramatically different and can't handle the shaders. As how to fix it... well you don't provide any information about any OpenGL errors being reported, what hardware you are using, what size of volume - you say voxel which is means one single data value which can't be right... Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Robert, There is no any error message popup. I tested on three machines which are running windows xp. They also have the same problem. I guess the problem may be related to opengl32.dll file which is at c:\windows\system32. The version of this file is 5.1 in Windows XP and 6.1 in windows 7. I tried to run the program with opengl32 5.1 version in Windows 7. It also comes out the same problem (volume filled with white). If I replaced with the 6.1 version, the problem is gone. But I cannot use the 6.1 opengl32 in windows xp since this file is linking to mscvrt.dll file and it cannot be replaced. My test code is very simple. Even the size of voxel is small, the problem is still existed. int nx = 20; int ny = 20; int nz = 10; unsigned char *pdisp_ptr; pdisp_ptr = (unsigned char*)malloc(nx * ny *nz * 4 *(sizeof(unsigned char))); osg::ref_ptrosgVolume::Volume osgVolume = new osgVolume::Volume; osg::ref_ptrosgVolume::VolumeTile tile = new osgVolume::VolumeTile; osgVolume-addChild(tile.get()); osg::ref_ptrosg::Image osgImage = new osg::Image; osg::ref_ptrosgVolume::ImageLayer layer = new osgVolume::ImageLayer(osgImage.get()); tile-setLayer(layer.get()); tile-setVolumeTechnique(new osgVolume::RayTracedTechnique()); osgImage-setImage(nx, ny, nz, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, pdisp_ptr, osg::Image::NO_DELETE); osg::ref_ptrosg::RefMatrix matrix = new osg::RefMatrix; osg::ref_ptrosgVolume::Locator locator = new osgVolume::Locator(*matrix.get()); layer-setLocator(locator.get()); tile-setLocator(locator.get()); locator-setTransformAsExtents(-nx/2.0, -ny/2.0, nx/2.0, ny/2.0, -nz/2.0, nz/2.0); osg::ref_ptrosgVolume::CompositeProperty cp = new osgVolume::CompositeProperty; layer-addProperty(cp.get()); osg::ref_ptrosgVolume::AlphaFuncProperty ap = new osgVolume::AlphaFuncProperty(0.1f); osg::ref_ptrosgVolume::SampleDensityProperty sdProperty = new osgVolume::SampleDensityProperty(0.005); osg::ref_ptrosgVolume::TransparencyProperty tp = new osgVolume::TransparencyProperty(1.0f); cp-addProperty(ap.get()); cp-addProperty(sdProperty.get()); cp-addProperty(tp.get()); osgViewer-setSceneData(osgVolume .get()); osgViewer-realize(); All machines in windows XP can run 3D program such as coin3D. If it is hardware or driver problem, they should have the problem to run others 3D program. Let me know if you need any information. Thanks. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Thursday, 1 March 2012 7:59 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgVolume RayTracedTechnique problem Hi Clement, On 29 February 2012 14:26, clement@csiro.au wrote: My program is set to use RayTracedTechnique for display voxel. I tested the same program on windows XP and windows 7 machines. Only windows 7 machine can display the image properly. In windows XP, it shows the cube filled with white colour. I found out the problem is related to RayTracedTechnique. Any one got similar problem? How to fix this? Many thanks. This is most likely to be an error in the OpenGL driver, unless your hardware is dramatically different and can't handle the shaders. As how to fix it... well you don't provide any information about any OpenGL errors being reported, what hardware you are using, what size of volume - you say voxel which is means one single data value which can't be right... Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Clement, Check the console output from the OSG for errors, the OSG itself doesn't create pop up for error reporting as it's a scene graph not a user interface tool. As for other OpenGL applications not having problems on the system, as they may well not be using 3D texture and shaders it's pretty likely that they don't test the OpenGL driver and hardware anywhere close to what the osgVolume will be doing so is of little relevance. If you want to avoid using shaders try the FixedFunctionTechnique instead of RayTracedTechnique. Robert. On 1 March 2012 09:44, clement@csiro.au wrote: Hi Robert, There is no any error message popup. I tested on three machines which are running windows xp. They also have the same problem. I guess the problem may be related to opengl32.dll file which is at c:\windows\system32. The version of this file is 5.1 in Windows XP and 6.1 in windows 7. I tried to run the program with opengl32 5.1 version in Windows 7. It also comes out the same problem (volume filled with white). If I replaced with the 6.1 version, the problem is gone. But I cannot use the 6.1 opengl32 in windows xp since this file is linking to mscvrt.dll file and it cannot be replaced. My test code is very simple. Even the size of voxel is small, the problem is still existed. int nx = 20; int ny = 20; int nz = 10; unsigned char *pdisp_ptr; pdisp_ptr = (unsigned char*)malloc(nx * ny *nz * 4 *(sizeof(unsigned char))); osg::ref_ptrosgVolume::Volume osgVolume = new osgVolume::Volume; osg::ref_ptrosgVolume::VolumeTile tile = new osgVolume::VolumeTile; osgVolume-addChild(tile.get()); osg::ref_ptrosg::Image osgImage = new osg::Image; osg::ref_ptrosgVolume::ImageLayer layer = new osgVolume::ImageLayer(osgImage.get()); tile-setLayer(layer.get()); tile-setVolumeTechnique(new osgVolume::RayTracedTechnique()); osgImage-setImage(nx, ny, nz, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, pdisp_ptr, osg::Image::NO_DELETE); osg::ref_ptrosg::RefMatrix matrix = new osg::RefMatrix; osg::ref_ptrosgVolume::Locator locator = new osgVolume::Locator(*matrix.get()); layer-setLocator(locator.get()); tile-setLocator(locator.get()); locator-setTransformAsExtents(-nx/2.0, -ny/2.0, nx/2.0, ny/2.0, -nz/2.0, nz/2.0); osg::ref_ptrosgVolume::CompositeProperty cp = new osgVolume::CompositeProperty; layer-addProperty(cp.get()); osg::ref_ptrosgVolume::AlphaFuncProperty ap = new osgVolume::AlphaFuncProperty(0.1f); osg::ref_ptrosgVolume::SampleDensityProperty sdProperty = new osgVolume::SampleDensityProperty(0.005); osg::ref_ptrosgVolume::TransparencyProperty tp = new osgVolume::TransparencyProperty(1.0f); cp-addProperty(ap.get()); cp-addProperty(sdProperty.get()); cp-addProperty(tp.get()); osgViewer-setSceneData(osgVolume .get()); osgViewer-realize(); All machines in windows XP can run 3D program such as coin3D. If it is hardware or driver problem, they should have the problem to run others 3D program. Let me know if you need any information. Thanks. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Thursday, 1 March 2012 7:59 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgVolume RayTracedTechnique problem Hi Clement, On 29 February 2012 14:26, clement@csiro.au wrote: My program is set to use RayTracedTechnique for display voxel. I tested the same program on windows XP and windows 7 machines. Only windows 7 machine can display the image properly. In windows XP, it shows the cube filled with white colour. I found out the problem is related to RayTracedTechnique. Any one got similar problem? How to fix this? Many thanks. This is most likely to be an error in the OpenGL driver, unless your hardware is dramatically different and can't handle the shaders. As how to fix it... well you don't provide any information about any OpenGL errors being reported, what hardware you are using, what size of volume - you say voxel which is means one single data value which can't be right... 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 mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Robert,
If I set to use RayTracedTechnique, the output message shows below:
Windows Error #127: [Screen #0] ChooseMatchingPixelFormat() -
wglChoosePixelFormatARB extension not found, trying GDI. R
eason: The specified procedure could not be found.
Rendering in software: pixelFormatIndex 3
Locator::computeLocalBounds
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..)
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..)
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
If I set to use FixedFunctionTechnique, the output message shows below:
Matrix = {
350 0 0 0
0 350 0 0
0 0 60 0
-175 -175 -30 1
}
Windows Error #127: [Screen #0] ChooseMatchingPixelFormat() -
wglChoosePixelFormatARB extension not found, trying GDI. R
eason: The specified procedure could not be found.
Rendering in software: pixelFormatIndex 3
Locator::computeLocalBounds
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..)
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..)
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Is it my hardware problem? It cannot support texturing?
Regards,
Clement
From: osg-users-boun...@lists.openscenegraph.org
[osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield
[robert.osfi...@gmail.com]
Sent: Thursday, 1 March 2012 9:30 PM
To: OpenSceneGraph Users
Subject: Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Clement,
Check the console output from the OSG for errors, the OSG itself
doesn't create pop up for error reporting as it's a scene graph not a
user interface tool.
As for other OpenGL applications not having problems on the system, as
they may well not be using 3D texture and shaders it's pretty likely
that they don't test the OpenGL driver and hardware anywhere close to
what the osgVolume will be doing so is of little relevance. If you
want to avoid using shaders try the FixedFunctionTechnique instead of
RayTracedTechnique.
Robert.
On 1 March 2012 09:44, clement@csiro.au wrote:
Hi Robert,
There is no any error message popup. I tested on three machines which are
running windows xp. They also have the same problem. I guess the problem
may be related to opengl32.dll file which is at c:\windows\system32. The
version of this file is 5.1 in Windows XP and 6.1 in windows 7. I tried to
run the program with opengl32 5.1 version in Windows 7. It also comes out
the same problem (volume filled with white). If I replaced with the 6.1
version, the problem is gone. But I cannot use the 6.1 opengl32 in windows
xp since this file is linking to mscvrt.dll file and it cannot be replaced.
My test code is very simple. Even the size of voxel is small, the problem is
still existed.
int nx = 20;
int ny = 20;
int nz = 10;
unsigned char *pdisp_ptr;
pdisp_ptr = (unsigned char*)malloc(nx * ny *nz * 4 *(sizeof(unsigned
char)));
osg::ref_ptrosgVolume::Volume osgVolume = new osgVolume::Volume;
osg::ref_ptrosgVolume::VolumeTile tile = new osgVolume::VolumeTile;
osgVolume-addChild(tile.get());
osg::ref_ptrosg::Image osgImage = new osg::Image;
osg::ref_ptrosgVolume::ImageLayer layer = new
osgVolume::ImageLayer(osgImage.get());
tile-setLayer(layer.get());
tile-setVolumeTechnique(new osgVolume::RayTracedTechnique());
osgImage-setImage(nx, ny, nz, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE,
pdisp_ptr, osg::Image::NO_DELETE);
osg::ref_ptrosg::RefMatrix matrix = new osg::RefMatrix;
osg::ref_ptrosgVolume::Locator locator = new
osgVolume::Locator(*matrix.get());
layer-setLocator(locator.get());
tile-setLocator(locator.get());
locator-setTransformAsExtents(-nx/2.0, -ny/2.0, nx/2.0, ny/2.0,
-nz/2.0, nz/2.0);
osg::ref_ptrosgVolume::CompositeProperty cp = new
osgVolume::CompositeProperty;
layer-addProperty
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Robert,
I think all my windows xp machines cannot support 3D texture. Is possible
to force osg to use 2D texture on osgVolume? Thanks.
Regards,
Clement
From: osg-users-boun...@lists.openscenegraph.org
[osg-users-boun...@lists.openscenegraph.org] On Behalf Of clement@csiro.au
[clement@csiro.au]
Sent: Thursday, 1 March 2012 11:32 PM
To: osg-users@lists.openscenegraph.org
Subject: [ExternalEmail] Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Robert,
If I set to use RayTracedTechnique, the output message shows below:
Windows Error #127: [Screen #0] ChooseMatchingPixelFormat() -
wglChoosePixelFormatARB extension not found, trying GDI. R
eason: The specified procedure could not be found.
Rendering in software: pixelFormatIndex 3
Locator::computeLocalBounds
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..)
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..)
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
If I set to use FixedFunctionTechnique, the output message shows below:
Matrix = {
350 0 0 0
0 350 0 0
0 0 60 0
-175 -175 -30 1
}
Windows Error #127: [Screen #0] ChooseMatchingPixelFormat() -
wglChoosePixelFormatARB extension not found, trying GDI. R
eason: The specified procedure could not be found.
Rendering in software: pixelFormatIndex 3
Locator::computeLocalBounds
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..)
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..)
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Warning: Texture3D::apply(..) failed, 3D texturing is not support by OpenGL
driver.
Is it my hardware problem? It cannot support texturing?
Regards,
Clement
From: osg-users-boun...@lists.openscenegraph.org
[osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield
[robert.osfi...@gmail.com]
Sent: Thursday, 1 March 2012 9:30 PM
To: OpenSceneGraph Users
Subject: Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Clement,
Check the console output from the OSG for errors, the OSG itself
doesn't create pop up for error reporting as it's a scene graph not a
user interface tool.
As for other OpenGL applications not having problems on the system, as
they may well not be using 3D texture and shaders it's pretty likely
that they don't test the OpenGL driver and hardware anywhere close to
what the osgVolume will be doing so is of little relevance. If you
want to avoid using shaders try the FixedFunctionTechnique instead of
RayTracedTechnique.
Robert.
On 1 March 2012 09:44, clement@csiro.au wrote:
Hi Robert,
There is no any error message popup. I tested on three machines which are
running windows xp. They also have the same problem. I guess the problem
may be related to opengl32.dll file which is at c:\windows\system32. The
version of this file is 5.1 in Windows XP and 6.1 in windows 7. I tried to
run the program with opengl32 5.1 version in Windows 7. It also comes out
the same problem (volume filled with white). If I replaced with the 6.1
version, the problem is gone. But I cannot use the 6.1 opengl32 in windows
xp since this file is linking to mscvrt.dll file and it cannot be replaced.
My test code is very simple. Even the size of voxel is small, the problem is
still existed.
int nx = 20;
int ny = 20;
int nz = 10;
unsigned char *pdisp_ptr;
pdisp_ptr = (unsigned char*)malloc(nx * ny *nz * 4 *(sizeof(unsigned
char)));
osg::ref_ptrosgVolume::Volume osgVolume = new osgVolume::Volume;
osg::ref_ptrosgVolume::VolumeTile tile = new osgVolume::VolumeTile;
osgVolume-addChild(tile.get());
osg::ref_ptrosg::Image osgImage = new osg::Image;
osg::ref_ptrosgVolume::ImageLayer layer = new
osgVolume::ImageLayer(osgImage.get());
tile-setLayer(layer.get());
tile-setVolumeTechnique(new osgVolume::RayTracedTechnique());
osgImage-setImage(nx, ny, nz
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Clement, On 1 March 2012 12:47, clement@csiro.au wrote: I think all my windows xp machines cannot support 3D texture. Is possible to force osg to use 2D texture on osgVolume? Thanks. osgVolume is designed around 3D texturing, both the fixed function and shader techniques use 3D textures. It would be possible to implement a crude 3D volume rendering based on 2D textures but it would be very limited in what it could do. 3D texturing has been a standard feature for graphics cards for quite a few years now so if one is doing volume rendering it's normally a reasonable requirement to have the hardware that is capable of handling the task. It also begs the question about just what hardware is in those WindowsXP machines, I asked this earlier but you haven't yet mentioned. Could it be some old intel hardware? Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Robert, One of the machines is using Intel E8300 Du e core 2.83 cpu with using on board graphic. Another XP machine I created by virtual machine. I am not sure the spec of last machine and I will confirm later. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Friday, 2 March 2012 2:02 AM To: OpenSceneGraph Users Subject: Re: [osg-users] osgVolume RayTracedTechnique problem Hi Clement, On 1 March 2012 12:47, clement@csiro.au wrote: I think all my windows xp machines cannot support 3D texture. Is possible to force osg to use 2D texture on osgVolume? Thanks. osgVolume is designed around 3D texturing, both the fixed function and shader techniques use 3D textures. It would be possible to implement a crude 3D volume rendering based on 2D textures but it would be very limited in what it could do. 3D texturing has been a standard feature for graphics cards for quite a few years now so if one is doing volume rendering it's normally a reasonable requirement to have the hardware that is capable of handling the task. It also begs the question about just what hardware is in those WindowsXP machines, I asked this earlier but you haven't yet mentioned. Could it be some old intel hardware? Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hi Robert, I have updated the driver on one of machines. The 3D texture message is gone, but I got other message. Warning: Could not find plugin to read objects from file shaders/volume.vert. Warning: Could not find plugin to read objects from file shaders/volume.frag. Locator::computeLocalBounds Scaling image from (350,350) to (128,128) Error Image::scaleImage() do not succeed : scaling of volumes not implemented. Scaling image from (350,350) to (128,128) Error Image::scaleImage() do not succeed : scaling of volumes not implemented. Any idea what is it? Thank you for your help again. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Friday, 2 March 2012 2:02 AM To: OpenSceneGraph Users Subject: Re: [osg-users] osgVolume RayTracedTechnique problem Hi Clement, On 1 March 2012 12:47, clement@csiro.au wrote: I think all my windows xp machines cannot support 3D texture. Is possible to force osg to use 2D texture on osgVolume? Thanks. osgVolume is designed around 3D texturing, both the fixed function and shader techniques use 3D textures. It would be possible to implement a crude 3D volume rendering based on 2D textures but it would be very limited in what it could do. 3D texturing has been a standard feature for graphics cards for quite a few years now so if one is doing volume rendering it's normally a reasonable requirement to have the hardware that is capable of handling the task. It also begs the question about just what hardware is in those WindowsXP machines, I asked this earlier but you haven't yet mentioned. Could it be some old intel hardware? Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
Hello Clement, One of the machines is using Intel E8300 Du e core 2.83 cpu with using on board graphic. Another XP machine I created by virtual machine. You're kind of setting yourself up for problems trying to get an advanced technique like GPU ray tracing working on onboard graphics or the emulation in a virtual machine. IIRC recent versions of VirtualBox and maybe others can route OpenGL calls to the driver on the host machine, but last I checked there were still bugs and most complex apps I tried (complex being defined as more than simple GL test programs) had some problem or other. As soon as you get into shaders and recent graphics features, try to have the prerequisites (a good video card, recent drivers) and you'll have much less problems. Hope this helps, J-S -- __ Jean-Sebastien Guay jean_...@videotron.ca http://whitestar02.dyndns-web.com/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgVolume RayTracedTechnique problem
The graphic details of this machine is Intel Q35 Express Chipset. Is osgVolume not support this chipset? Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of clement@csiro.au [clement@csiro.au] Sent: Friday, 2 March 2012 11:47 AM To: osg-users@lists.openscenegraph.org Subject: [ExternalEmail] Re: [osg-users] osgVolume RayTracedTechnique problem Hi Robert, I have updated the driver on one of machines. The 3D texture message is gone, but I got other message. Warning: Could not find plugin to read objects from file shaders/volume.vert. Warning: Could not find plugin to read objects from file shaders/volume.frag. Locator::computeLocalBounds Scaling image from (350,350) to (128,128) Error Image::scaleImage() do not succeed : scaling of volumes not implemented. Scaling image from (350,350) to (128,128) Error Image::scaleImage() do not succeed : scaling of volumes not implemented. Any idea what is it? Thank you for your help again. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Friday, 2 March 2012 2:02 AM To: OpenSceneGraph Users Subject: Re: [osg-users] osgVolume RayTracedTechnique problem Hi Clement, On 1 March 2012 12:47, clement@csiro.au wrote: I think all my windows xp machines cannot support 3D texture. Is possible to force osg to use 2D texture on osgVolume? Thanks. osgVolume is designed around 3D texturing, both the fixed function and shader techniques use 3D textures. It would be possible to implement a crude 3D volume rendering based on 2D textures but it would be very limited in what it could do. 3D texturing has been a standard feature for graphics cards for quite a few years now so if one is doing volume rendering it's normally a reasonable requirement to have the hardware that is capable of handling the task. It also begs the question about just what hardware is in those WindowsXP machines, I asked this earlier but you haven't yet mentioned. Could it be some old intel hardware? 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 mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] osgVolume RayTracedTechnique problem
Hi, My program is set to use RayTracedTechnique for display voxel. I tested the same program on windows XP and windows 7 machines. Only windows 7 machine can display the image properly. In windows XP, it shows the cube filled with white colour. I found out the problem is related to RayTracedTechnique. Any one got similar problem? How to fix this? Many thanks. Regards, Clement ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
