Re: [osg-users] osgvolume multipass (hybrid geometric/volumic) bug...?

Hi Julian, I have just had a bash at recreating issues and have found a volume model that works in close enough dimensional space to the cessna.osg that I start seeing problems with the rendering of the volume occluding the cessna at times when it shouldn't and at certain angles the parts of the

Re: [osg-users] osgvolume multipass (hybrid geometric/volumic) bug...?

I...have achieve something... I removed line 394 in VolumeScene.cpp Code: viewData->_backdropSubgraph->accept(*cv); and it works for me but I can't tell if it's good A few doc on the underlying osgvolume design would be cool... mp3butcher wrote: > Hi Robert et al > > It's been a while

[osg-users] osgvolume multipass (hybrid geometric/volumic) bug...?

Hi Robert et al It's been a while I use a customized osgVolume::MultipassTechnique and experienced a bug I think was coming from my code but in fact it affect osgvolume application too. It seams there a bug in texgen (or somerhing like that) when writing back Pre rendered scene FB to the main

Re: [osg-users] osgVolume intro

...And what's your question? You should try playing with options of the osgvolume example . Further it's good to know that the ive format is well fitted to store custom Image3D.. Cheers Trajce Nikolov NICK wrote: > Hi Community, > > I am entering osgVolume for first time. Someone with some

[osg-users] osgVolume intro

Hi Community, I am entering osgVolume for first time. Someone with some hints for this core feature? Anything is welcome And thanks a bunch as always! Cheers, Nick -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org

Re: [osg-users] osgVolume::MultipassTechnique use

Robert, The issue was I was setting a tileLocator, but I wasn't setting a layerLocator. That was problematic in the following block of code: Locator* layerLocator = _volumeTile->getLayer()->getLocator(); if (tileLocator==layerLocator) {

Re: [osg-users] osgVolume::MultipassTechnique use

Hi Alex, I haven't heard of the invert throwing a seg fault before. The stack trace doesn't have any info about line numbers so we can't say what specifically was amiss. The only code in MultipassTechnique.cpp that calls Matrixd::invert() is: Locator* tileLocator =

Re: [osg-users] osgVolume::MultipassTechnique use

Also, If it helps, I went and looked at the MultipassTechnique::cull method for the use of invert, there is only one instance: if (vs) { MultipassTileData* tileData = dynamic_cast(vs->getTileData(cv, getVolumeTile())); if (tileData)

Re: [osg-users] osgVolume::MultipassTechnique use

Robert, Here is a better looking stack trace on Linux. (I believe this stack trace has gdb debug symbols enabled, it was a bit tricky to create and integrate a build with DEBUG symbols in my environment here, apologies if I got it wrong). My guess is that the Matrixd object being inverted after

Re: [osg-users] osgVolume::MultipassTechnique use

Hi Alex, A stack trace with debugging info would be far more useful and should be able to pinpoint the cause of the crash, or at least give some clues of where to look. Also, does the osgvolume example crash when you use the MultiPassTechnique? Robert. On 26 April 2016 at 21:35, Alex Taylor

[osg-users] osgVolume::MultipassTechnique use

Hey all, I'm running into a segmentation violation when I attempt to use osgVolume::MultipassTechnique more or less as a drop in replacement for RayTracedTechnique using OSG 3.4. My use of RayTracedTechnique works and renders fine. Here is an partial code listing demonstrating my use of

Re: [osg-users] osgvolume: Swap technique in a VolumeScene fails

Thanks for your answer I have already change my original post with an attached example but this update doesnt appear in the mailing list So i repost it for the mailing list robertosfield wrote: Hi Julien, I have done a quick code review of MultipassTechnique and the computeRenderingMode()

Re: [osg-users] osgvolume: Swap technique in a VolumeScene fails

Hi Julien, I have done a quick code review of MultipassTechnique and the computeRenderingMode() could easily be changed to check for whether the _volumeTile is set to avoid this specific crash, but I suspect the root cause of the problem is elsewhere - a technique should have a valid _volumeTile

Re: [osg-users] osgvolume: Swap technique in a VolumeScene fails

Thanks for your answer I have already change my original post with an attached example but this update doesnt appear in the mailing list So i repost it for the mailing list robertosfield wrote: Hi Julien, I have done a quick code review of MultipassTechnique and the computeRenderingMode()

[osg-users] osgvolume: Swap technique in a VolumeScene fails

Hi, First, excuse the lack of details of the further, i haven't been able to debug enough to understand where the bug is... So, I tried a simple scenario with the osgvolume::MultipassTechnique: I initialize the volume rendering with MultipassTechnique (as in the example) And at runtime I change

Re: [osg-users] OsgVolume. Rendering of multiple intersected volumes

HI Jesus, osgVolume doesn't yet support multiple over-lapping volumes. To handle multiple intersecting volumes one will have to have the osgVolume rendering back end and shaders handle both volumes at the same time where the volumes overlap and separately handle the areas where only one volume

Re: [osg-users] OsgVolume. Rendering of multiple intersected volumes

Hello Robert. Thanks for your quick reply! We´ll try to solve this problem ourselves then. Regards. Jesús. 2014-09-22 11:37 GMT+02:00 Robert Osfield robert.osfi...@gmail.com: HI Jesus, osgVolume doesn't yet support multiple over-lapping volumes. To handle multiple intersecting volumes

Re: [osg-users] osgVolume intersected by geode

Hi Jorden, This behaviour is an artefact of the ray tracing implementation used in osgVolume::RayTracedTechnique - the rays are generated from the back face of the volume and if these fragments are culled by the z test nothing appears, even if the complete ray would be in front of the z value in

[osg-users] osgVolume intersected by geode problem about sequence of intersection points using osgUtil::PlaneIntersector

Hi, I am trying to get the intersection points between an intersection plane and a terrain using osgUtil::PlaneIntersector。 The code is listed as following: osg::Plane planeLeft( osg::Vec3(1,0,0), osg::Vec3(0+1,0,0) );//define an intersetion plane osg::Polytope polytopeLeft;//define the

[osg-users] osgVolume should never use a predefined border color

In openscenegraph-3.0.0/OpenSceneGraph/src/osgVolume/RayTracedTechnique.cpp the 3D texture is being clamped to a border color of (0,0,0,0). It seems to me this should be CLAMP_TO_EDGE rather than CLAMP_TO_BORDER, since using a border color not in the actual texture is completely arbitrary. I'm

Re: [osg-users] osgVolume should never use a predefined border color

Hi Robert, CLAMP_TO_BORDER is used so that if the shader lookup goes beyond the bounds of the texture it doesn't get inappropriate data i.e back with an alpha of zero at least will be culled by most shaders so will allow the volume data to stand on it's own. I can also see value in CLAMP_TO_EDGE

Re: [osg-users] osgVolume::SwitchProperty working?

Hi Clement, On 27 July 2012 15:40, clement@csiro.au wrote: I tried osgVolume::SwitchProperty on testing code, but how to do to switch property during runtime? I added keyboard event. When 1 is pressed, it will call sp-setActiveProperty(1). I cannot see any change. Anyone know how

Re: [osg-users] osgvolume brightness and sample density

Hi Clement, On 8 May 2012 08:44, clement@csiro.au wrote:  Thanks for your help.  The colour map in the osgvolume.cpp example contains specific colour.  I would like to implement full range of colours as possible supported by osg.  Any idea what I can do to create a colour map of full

Re: [osg-users] osgvolume brightness and sample density

:07 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume brightness and sample density Hi Clement, On 8 May 2012 08:44, clement@csiro.au wrote: Thanks for your help. The colour map in the osgvolume.cpp example contains specific colour. I would like to implement full range

Re: [osg-users] osgvolume brightness and sample density

From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Monday, 14 May 2012 9:07 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume brightness and sample density

Re: [osg-users] osgvolume brightness and sample density

-users] osgvolume brightness and sample density Hi Clement, This really isn't an OSG question, or at least answering isn't an OSG question, it's really one of how to teach you how to program. You have a for loop with a constant r,g,b value and varying i value and you are stuck on how to vary r,g,b

Re: [osg-users] osgvolume brightness and sample density

Hi Clement, On 14 May 2012 17:47, clement@csiro.au wrote:   I am not new in programming but I am new in doing 3D work.  I tried to generate a hugh colour map as 65535 colours and assign into osg::TransferFunction1D::ColorMap, but the colour display is not much better than I don't

Re: [osg-users] osgvolume brightness and sample density

From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Saturday, 5 May 2012 5:01 AM To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume brightness and sample

Re: [osg-users] osgvolume brightness and sample density

: [osg-users] osgvolume brightness and sample density Hi Clement, You simply need to attach a TransferFunctionProperty to the Layer assigned VolumeTile and set up this to map floating point intensity value to the colour/alpha value required. The osgvolume has example of it's setup. Robert. On 12

Re: [osg-users] osgvolume brightness and sample density

Hi Clement, On 4 May 2012 08:46, clement@csiro.au wrote: Hi Robert,    Sorry, I just saw your reply.  Is TransferFunctionProperty used for defined colour map?        osg::ref_ptrosg::TransferFunction1D transferFunction = new osg::TransferFunction1D;        

Re: [osg-users] osgvolume brightness and sample density

...@gmail.com] Sent: Friday, 4 May 2012 7:09 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume brightness and sample density Hi Clement, On 4 May 2012 08:46, clement@csiro.au wrote: Hi Robert, Sorry, I just saw your reply. Is TransferFunctionProperty used for defined colour

Re: [osg-users] osgvolume brightness and sample density

HI Clement, On 4 May 2012 19:30, clement@csiro.au wrote:   Thanks again for your reply.  I am a bit confused on using color map.  I would like my program to support at least 8 bit color, so how should I create the color map?  Where can I find more information?  osgvolume.cpp does not

Re: [osg-users] osgVolume not working with latest ATI Radeon drivers on Windows

To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] osgVolume not working with latest ATI Radeon drivers on Windows Hello OSG users, osgvolume does not work for me with an ati card and found the following thread in the archives which sounds like the same issue but unfortunately without

Re: [osg-users] osgvolume brightness and sample density

Hi Clement, You simply need to attach a TransferFunctionProperty to the Layer assigned VolumeTile and set up this to map floating point intensity value to the colour/alpha value required. The osgvolume has example of it's setup. Robert. On 12 April 2012 03:52, clement@csiro.au wrote: Hi,

Re: [osg-users] osgVolume not working with latest ATI Radeon drivers on Windows

Hello OSG users, osgvolume does not work for me with an ati card and found the following thread in the archives which sounds like the same issue but unfortunately without a solution: http://forum.openscenegraph.org/viewtopic.php?t=8913start=0postdays=0postorder=aschighlight= I am using Windows

[osg-users] osgvolume brightness and sample density

Hi, I am using osgVolume to display my CT data. If I set the value of SampleDensityProperty lower, I can get more details, but the brightness will become darker or dull. Does any method that allow to use smaller value of SampleDensityProperty and keep image colour brighter. I tried to use

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

Re: [osg-users] osgVolume RayTracedTechnique problem

...@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

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

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

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

Re: [osg-users] osgVolume RayTracedTechnique problem

-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

Re: [osg-users] osgVolume RayTracedTechnique problem

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

Re: [osg-users] osgVolume RayTracedTechnique problem

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

Re: [osg-users] osgVolume RayTracedTechnique problem

] 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

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

Re: [osg-users] osgVolume RayTracedTechnique problem

-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

Re: [osg-users] osgVolume RayTracedTechnique problem

-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

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

Re: [osg-users] osgVolume RayTracedTechnique problem

[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

[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

Re: [osg-users] osgvolume performance

-users] osgvolume performance Hi Clement, On 17 February 2012 01:53,  clement@csiro.au wrote:   I am using MFC to display osg volume data.  If the sample data is 30 * 30 * 20 voxel, it is quite smooth on rotating the image on viewer.  If the sample data is 350 * 350 * 60 voxel, I can't

Re: [osg-users] osgvolume performance

To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume performance Hi Clement, On 17 February 2012 01:53, clement@csiro.au wrote: I am using MFC to display osg volume data. If the sample data is 30 * 30 * 20 voxel, it is quite smooth on rotating the image on viewer. If the sample data

Re: [osg-users] osgvolume performance

Hi Clement, On 17 February 2012 01:53, clement@csiro.au wrote:   I am using MFC to display osg volume data.  If the sample data is 30 * 30 * 20 voxel, it is quite smooth on rotating the image on viewer.  If the sample data is 350 * 350 * 60 voxel, I can't rotate the image as smooth as

[osg-users] osgvolume performance

Hi, I am using MFC to display osg volume data. If the sample data is 30 * 30 * 20 voxel, it is quite smooth on rotating the image on viewer. If the sample data is 350 * 350 * 60 voxel, I can't rotate the image as smooth as before. If I used higher voxel data, the rotation become very

Re: [osg-users] osgvolume opacity settings

Osfield [robert.osfi...@gmail.com] Sent: Tuesday, 14 February 2012 11:41 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume opacity settings Hi Clement, It could be a driver issue. It could be something else going. I really can't tell. I know way too little about the specifics of your

Re: [osg-users] osgvolume opacity settings

To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume opacity settings Hi Clement, The pictures and your description don't provide sufficient information to have any idea what might be wrong. Robert. On 10 February 2012 03:01,  clement@csiro.au wrote: Hi Robert,   I captured

Re: [osg-users] osgvolume opacity settings

From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Thursday, 19 January 2012 8:05 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume

Re: [osg-users] osgvolume opacity settings

Hi Clement, On 18 January 2012 23:37, clement@csiro.au wrote:                osgImage-setImage(nx, ny, nz, GL_RGB16F_ARB, GL_RGBA, GL_UNSIGNED_BYTE, (unsigned char*)data, osg::Image::NO_DELETE);      My question is about the 4th parameter GL_RGB16F_ARB.  It is very difficult to find

Re: [osg-users] osgvolume opacity settings

: [osg-users] osgvolume opacity settings Hi Clement, On 16 January 2012 06:21,  clement@csiro.au wrote:   My application is using osgvolume to display CT data.  There is class called CompositeProperty and there are three property classes (AlphaFuncProperty, SampleDensityProperty

Re: [osg-users] osgvolume opacity settings

...@gmail.com] Sent: Thursday, 19 January 2012 4:15 AM To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume opacity settings Hi Clement, I can't work out specifically what you are expecting to happen. What coin does is something I have no experience with so can't comment on how you might try

Re: [osg-users] osgvolume opacity settings

Subject: Re: [osg-users] osgvolume opacity settings Hi Clement, I can't work out specifically what you are expecting to happen.  What coin does is something I have no experience with so can't comment on how you might try to obtain a similar image. Robert. On 18 January 2012 15:14,  clement

Re: [osg-users] osgvolume opacity settings

-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Thursday, 19 January 2012 9:22 AM To: OpenSceneGraph Users Subject: Re: [osg-users] osgvolume opacity settings Hi Clement, I really don't know what is going on at your end, what you are expecting

Re: [osg-users] osgvolume opacity settings

Hi Clement, On 16 January 2012 06:21, clement@csiro.au wrote:   My application is using osgvolume to display CT data.  There is class called CompositeProperty and there are three property classes (AlphaFuncProperty, SampleDensityProperty and TransparencyProperty) as well.   I would

[osg-users] osgvolume opacity settings

Hi, My application is using osgvolume to display CT data. There is class called CompositeProperty and there are three property classes (AlphaFuncProperty, SampleDensityProperty and TransparencyProperty) as well. I would like to know more details of those classes and how to apply on

Re: [osg-users] osgVolume volume size limitation

Hi Clement, I can't really make much sense from your post so can't make any specific suggestions. General comments I would add are that different graphics hardware supports different Texture3D resolution, you have to keep within this to be able doing volume rendering. Also if you don't set up

Re: [osg-users] osgVolume volume size limitation

-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Tuesday, 13 September 2011 5:51 PM To: OpenSceneGraph Users Subject: Re: [osg-users] osgVolume volume size limitation Hi Clement, I can't

[osg-users] osgVolume volume size limitation

Hi, I got to display volume data problem on windows MFC before. I got an useful information in this forum and now I have fixed the problem. When I tried different test cases, I found the volume image cannot be shown probably if the volume is large such as 1000*1000*20. It cannot show the

Re: [osg-users] osgVolume not working with latest ATI Radeon drivers on Windows

Thanks for that information. I have bought a nVidia GTX550Ti and that works fine with 275.33 drivers in osgVolume. Both ATI cards remain an issue with Catalyst 11.7 drivers. Does the issue you linked to about array uniform naming apply to 3D Sampler uniforms as well? If so I could try it

[osg-users] osgVolume not working with latest ATI Radeon drivers on Windows

Hi all, This is one of those strange annoying ones, and I'm hoping some of you will have some insight or pointers or suggestions on what might be wrong. I've spent weeks on this myself, so I don't come to ask help from the forum lightly... I have been using osgVolume fine for years - Vista

Re: [osg-users] osgVolume not working with latest ATI Radeon drivers on Windows

This can be the same problem that exist with new Nvidia drivers, e.g. disucssed here: http://www.mail-archive.com/osg-users@lists.openscenegraph.org/msg50871.html John Ivar On Sat, Aug 6, 2011 at 2:36 AM, Mark Hodson mind.ran...@gmail.com wrote: Hi all, This is one of those strange

Re: [osg-users] osgVolume volume rendering ?

Hi Naimul, It looks to me that all the intensities from the source imagery are mapping to a large alpha value so little or no alpha blending is taking place. On the topic of normalization, the transfer function file is 5 fields, I R G B A, where I is the intennity that you wish to map, followed

Re: [osg-users] osgVolume volume rendering ?

Thanks Robert, I will try different options to see what I can come up with. Cheers, Naimul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=37629#37629 ___ osg-users mailing list

Re: [osg-users] osgVolume volume rendering ?

Hi Robert, Thanks for your quick reply, good to know it can be done with osgVolume. I will explain the problem I am facing in detail now: 1. I have tried to load some dicom images (provided by a doctor here) with the following command: osgvolume --images *.dcm The images load without any

Re: [osg-users] osgVolume volume rendering ?

This is the link to the tutorial from where I downloaded the color transfer functions: http://dlfresources.pbworks.com/w/page/17954901/How-to-:-build-a-volume (couldn't post links before 2 posts, so posting the link separately). -- Read this topic online here:

Re: [osg-users] osgVolume volume rendering ?

Hi everyone, Apologies for reviving an old thread. I have been playing around with osgvolume recently and have been able to volume render set of dicom images. But I am getting similar results as this thread's opener (i.e. the bounding box is still there). I tried to tweak the 1D transfer

Re: [osg-users] osgVolume volume rendering ?

Hi Niamul, I can't say anything abou the problems you having as you don't provide any details about the transfer function you are using, what volume rendering techniques and setings, or any screenshots you are using. The only thing I can qualify is that the screenshots on the DigitalLearning

Re: [osg-users] osgVolume

Hi all, See screenshot for the result in osgVolume. Pretty darn cool. :-) Oops, sorry, I hadn't realized that my screenshot was so big. J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com

Re: [osg-users] osgVolume volume rendering ?

Hi Emmanuel, If you are trying to create a stack of images as a single volume then use the --images filenames command line option. Robert. On Sat, Jul 17, 2010 at 1:50 PM, Emmanuel Roche roche.emman...@gmail.com wrote: One very interesting detail concerning those osgVolume tests (still on

Re: [osg-users] osgVolume volume rendering ?

Hi Manu, You data DICOM data rendering suggests that the air around the subject is returning a high intensity value rather than a low one. This is not something I've seen with the DICOM datasets I've tested, so try other data. A transfer function would certainly be one way to pick out the data

Re: [osg-users] osgVolume volume rendering ?

Hi, Hehe, now that you have succeeded at getting something, you start to get into the problematics of volume rendering. Namely, to get a nice visual representation, you have to provide a suitable transfer function. The example uses some hard-coded transfer function (osgVolume supports only 1D

Re: [osg-users] osgVolume volume rendering ?

Hello Dzenan! i've just tried the website you suggested, downloaded the baby.pvm, bonsai1.pvm and bunny.pvm datasets, and tried commands such as: osgvolume --window 50 50 600 400 --raw 256 256 98 1 1 big baby.pvm -- As I have no idea about the numberOfcomponents and endianness of those files I

Re: [osg-users] osgVolume volume rendering ?

Hi, I don't think osg's data folder has anything to do with it. I just took a look, and realized .pvm format is compressed. You can get gzipped datasets from volvis.org, for example this 256x256x256 dataset: http://www.gris.uni-tuebingen.de/edu/areas/scivis/volren/datasets/data/bonsai.raw.gz

Re: [osg-users] osgVolume volume rendering ?

Thanks for your help Dzenan, but unfortunetaly, this is still not working (still get a crash and no display), I used: *osgvolume --raw 256 256 256 1 3 big bonzai.raw* Note that I must specify the endianness and number of components (but I tried multiple tests again), here is the help for the

Re: [osg-users] osgVolume volume rendering ?

One very interesting detail concerning those osgVolume tests (still on Windows) by the way: I use a command like: *osgvolume --test2 --shader --zSize 100 --window 50 50 600 400 CEMRA_HIGHRES\IM-0001-0001.png CEMRA_HIGHRES\IM-0001-0002.png CEMRA_HIGHRES\IM-0001-0003.png ... [more files here] ...

Re: [osg-users] osgVolume volume rendering ?

Okay guys ! I've just tested this on linux, and the command: *osgvolume --raw 256 256 256 1 1 big bonzai.raw worked just fine !!! *So I guess this problem is only on Windows. The good news is, I also did: *osgvolume --raw 256 256 256 1 1 big bonzai.raw -o bonzai.dds [on linux] *then used

Re: [osg-users] osgVolume volume rendering ?

Hi, The command you used on linux should also work on windows. Don't have time to investigate that right now, but you manged to get it to work, in some way. Cheers, Dženan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30097#30097

Re: [osg-users] osgVolume volume rendering ?

Concerning the DICOM issue, I performed additional tests: - The error seems to be related to compressed DICOM datasets. - On the website http://pubimage.hcuge.ch:8080/, most dataset will generate errors (Invalid data value) when trying to read the dcm files as is). the PHENIX dataset works (it

Re: [osg-users] osgVolume volume rendering ?

Hi, I don't know which version of GDCM osg is using, or how well is it integrated. You could check out ITK library (http://itk.org), it has an example (called DicomReadImageWrite or similar) which can read dicom images and convert them to other formats - I recommend .mha, because its header

Re: [osg-users] osgVolume volume rendering ?

Hi, I have a working osgVolume used in my program - I use it as a preliminary visualization. Since it has only 1D transfer function support, and does not combine with polygonal models, in later stage I replace it with isosurface+polygonal model. My version is basically a simplified osgVolume

Re: [osg-users] osgVolume volume rendering ?

Hi Manu, It sounds like you aren't using osgVolume correctly. First up I would recommend using 2.9.2 or svn/trunk as this will contain the latests update to osgVolume. Second up you talk about DCMTK build problems, you'll need to be more precise that this for others to help. In general I would

[osg-users] osgVolume volume rendering ?

Hi everyone, I'm just starting to play with the osgVolume sample and I have a very beginner question about it: - Can you actually have any kind of volumetric rendering with this ??? I perform many tests with various arguments, but each time, all I get is a simple 2D image sequence of all the

Re: [osg-users] osgVolume write isosurface to mesh file

Hi, If you are looking for fast isosurface generation, take a look at this thread: http://forum.openscenegraph.org/viewtopic.php?t=5655 If that is what you need, I can give you the missing pieces of code (slightly modified HPMC library). Code is for nVidia GPUs (ATI's approach to Transform

[osg-users] osgVolume write isosurface to mesh file

Hi, I'd like to know if osgVolume can write an isosurface to a mesh file. cheers, bill ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

Re: [osg-users] osgVolume write isosurface to mesh file

Hi Bill, On Wed, May 12, 2010 at 3:54 PM, Poirier, Guillaume guillaume.poir...@nrc-cnrc.gc.ca wrote: I'd like to know if osgVolume can write an isosurface to a mesh file. The isosurface shader in osgVolume does the compute of the isosurface purely on the GPU for fragment, the only end result is

Re: [osg-users] osgvolume 2D image stack

I was not able to get wild cards to work under Windows Vista OSG 2.8.2. It did work with files listed on the command line explicitly. Also loading files from a director worked with a command line like osgvolume directoryName When ran from the parent directory. Jason Johannes van

[osg-users] osgvolume 2D image stack

Hi, I've been trying out the example application osgvolume. If I envoke the application via the following command ./osgvolume --images image1.jpg image2.jpg [up to including] image64.jpg --num-components 0 --r_maxTextureSize 512 --zMultiplier 1.0 -o volume.osg I get the following command line

Re: [osg-users] osgvolume 2D image stack

Hi Johannes, osgvolume suggesting that it can't find file but not specifying the filename so perhaps it's a blank filename for some reason. Try upping the verbosity of the information logging via: export OSG_NOTIFY_LEVEL=INFO And then run the app, this should output more information about

Re: [osg-users] osgvolume 2D image stack

Hi Robert, I downloaded the source to look at the code. I commented out the block of code starting from line 1068 directly after the comment // assume remaining arguments are file names of textures. up to line in osgvolume.cpp, and rebuilt the application. After that I was able to build

Re: [osg-users] osgvolume 2D image stack

Hi Johannes, Which version of the OSG are you using? Robert. On Tue, Sep 15, 2009 at 2:09 PM, Johannes van Jaarsveld jvjaarsv...@csir.co.za wrote: Hi Robert, I downloaded the source to look at the code. I commented out the block of code starting from line 1068 directly after the comment

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