Re: [osg-users] Passing multiple textures in glsl
Hi,
I tried add these lines into my code:
osg::Texture2DArray* tileImgLay;
tileImgLay = new osg::Texture2DArray;
tileImgLay->setTextureSize(128, 128, 2);
tileImgLay->setUseHardwareMipMapGeneration(false);
tileImgLay->setImage(0, osgDB::readImageFile("test1.bmp"));
tileImgLay->setImage(1, osgDB::readImageFile("est1.bmp"));
ss->setTextureAttribute(1, tileImgLay);
tileImgLay->setFilter( osg::Texture2DArray::MIN_FILTER,
osg::Texture2DArray::NEAREST);
tileImgLay->setFilter( osg::Texture2DArray::MAG_FILTER,
osg::Texture2DArray::NEAREST);
ss->addUniform( new osg::Uniform("test", 1) );
and in the fragment shader:
uniform sampler2DArray test;
and access it using:
gl_FragColor = texture2DArray(test, vec3(0, 0, 0));
However, it fail to work.
Any ideal why?
Thank you!
Cheers,
Linda
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Re: [osg-users] Passing multiple textures in glsl
Hi, Am 11.06.11 10:47, schrieb Linda Lee: > and in the fragment shader: > > uniform sampler2DArray test; > > > and access it using: > > gl_FragColor = texture2DArray(test, vec3(0, 0, 0)); Do you get any compile-error for your shader? I had to add these lines to get texure2DArrays working in my shader: #version 120 #extension GL_EXT_gpu_shader4 : enable #extension GL_EXT_texture_array : enable hth, Stephan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Passing multiple textures in glsl
Hi, I did not get any compiler error. The application runs successfully. However, the texture did not seem to be loaded into the shader code. The image rendered as black in color. As the lines, Where should I add them? #version 120 #extension GL_EXT_gpu_shader4 : enable #extension GL_EXT_texture_array : enable I gotten error msg when I add them into the main .cpp file. Thank you! Cheers, Linda -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=40372#40372 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Passing multiple textures in glsl
Linda,
Any chance of a typo??
Looks like you intended the second image file to be the same as the first -
test1.bmp - except that the first letter is missing.
PhilT
-Original Message-
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Linda Lee
Sent: 11 June 2011 09:48
To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] Passing multiple textures in glsl
Hi,
I tried add these lines into my code:
osg::Texture2DArray* tileImgLay;
tileImgLay = new osg::Texture2DArray;
tileImgLay->setTextureSize(128, 128, 2);
tileImgLay->setUseHardwareMipMapGeneration(false);
tileImgLay->setImage(0, osgDB::readImageFile("test1.bmp"));
tileImgLay->setImage(1, osgDB::readImageFile("est1.bmp"));
ss->setTextureAttribute(1, tileImgLay);
tileImgLay->setFilter( osg::Texture2DArray::MIN_FILTER,
osg::Texture2DArray::NEAREST);
tileImgLay->setFilter( osg::Texture2DArray::MAG_FILTER,
osg::Texture2DArray::NEAREST);
ss->addUniform( new osg::Uniform("test", 1) );
and in the fragment shader:
uniform sampler2DArray test;
and access it using:
gl_FragColor = texture2DArray(test, vec3(0, 0, 0));
However, it fail to work.
Any ideal why?
Thank you!
Cheers,
Linda
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=40370#40370
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
___
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Re: [osg-users] Passing multiple textures in glsl
Hi, Nope. The typo is caused when I cut and paste into the posting textbox. I am quite sure the textures were loaded correctly. Any idea what is causing the problem? :( Thank you! Cheers, Linda -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=40374#40374 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Passing multiple textures in glsl
Hi, Forgot to mention to I have this msg when I run the application. Warning: detected OpenGL error 'invalid enumerant' after RenderBin::draw(,) Thank you! Cheers, Linda -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=40375#40375 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Passing multiple textures in glsl
Hi Linda, Your code looks correct to me. Your shader does the texture lookup at 0,0,0 coord is there a chance that your test1.bmp picture is black in the corner ? Or its res differs than 128x128 so loading them does not work or leaves some empty space ?. You may try to run the example code from the following message: http://www.mail-archive.com/osg-users@lists.openscenegraph.org/msg32539.html It used to work for me. Just change the wrap mode to other than CLAMP_TO_BORDER if you have ati graphics. Wojtek -Oryginalna wiadomość- From: Linda Lee Sent: Saturday, June 11, 2011 11:42 AM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] Passing multiple textures in glsl Hi, Forgot to mention to I have this msg when I run the application. Warning: detected OpenGL error 'invalid enumerant' after RenderBin::draw(,) Thank you! Cheers, Linda -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=40375#40375 ___ 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] Passing multiple textures in glsl
On 6/10/2011 11:04 PM, Linda Lee wrote: > Hi, > I need to handle multiple textures in glsl. Any suggestions how do I do it? > Should I use sampler2DArray? How do I use it? Any links I could take > reference from? Don't use 2DArray unless the textures really are related. Just use multiple sampler2Ds. > Also, is there a limit to the amount of textures I could load into GPU. I > tried loading 25 4096by4096 textures and it crashes when I tried to load > more. Is there any ways to increase the amount that I could load? It's just limited by memory. What are your 25 textures? Usually one doesn't need 25 4k textures unless you're doing volumetric work or something. -- Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com http://www.alphapixel.com/ Digital Imaging. OpenGL. Scene Graphs. GIS. GPS. Training. Consulting. Contracting. "There is no Truth. There is only Perception. To Perceive is to Exist." - Xen ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Passing multiple textures in glsl
On 6/11/2011 8:14 AM, Chris 'Xenon' Hanson wrote: Also, is there a limit to the amount of textures I could load into GPU. I tried loading 25 4096by4096 textures and it crashes when I tried to load more. Is there any ways to increase the amount that I could load? It's just limited by memory. What are your 25 textures? Usually one doesn't need 25 4k textures unless you're doing volumetric work or something. Chris is right. For uncompressed rgba (four byte per texel) data, a 4kx4k texture consumes 4k * 4k * 4bytes = 64MB. Times 25 textures = 1.6GB. If this is a 32-bit app, chances are it's your application that is exhausting per-process host RAM and crashing, rather than a GPU RAM / OpenGL issue, but you'd have to check the call stack. You might try your app on a 64-bit system. But, using that many textures will likely cause OpenGL to swap textures in and out of GPU RAM, which will kill performance, so you should look at using fewer/smaller textures or using a compressed texture format. You can set OSG_MAX_TEXTURE_SIZE in your environment to restrict the maximum size of texture objects that OSG creates. For example: OSG_MAX_TEXTURE_SIZE=1024 means if the texture you load from disk is larger than 1kx1k, OSG will reduce it to 1kx1k before sending it to the GPU. This can be a handy tool for digging in to texture memory or performance issues. -- -Paul Martz Skew Matrix Software http://www.skew-matrix.com/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [build] LNK1181 fatal error ONLY for libpng.lib
Hi, Since I have been mislead between the 32-bit and 64-bit... assuming it is the same case for a lot of people, I've translated the article, which I found interesting, Enabling 64-bit Support in Visual Studio 2008 (https://programmersnotebook.wordpress.com/2010/01/23/enabling-64-bit-support-in-visual-studio-2008/) from the Programmer's Notebook to french, and publish it La prise en charge du 64-bit sous Visual Studio 2008 (http://aljilogy.wordpress.com/2011/06/11/64-bit-visual-studio-2008/). Have a nice day Mohamed ALJI -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=40379#40379 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG 2.8.4 - CMake with GDAL (VS9-32bit)
Hi, the OSG 3rd Party Package for VS9 provides CURL and GDAL. So download that package, point your folders to the correct subfolder (x86/lib|include or x64/lib|include) and it should work. Thank you! Cheers, Torben -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=40380#40380 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG based aplication nominated in CG Architect Awards
Thanks Alberto for spending time to answer my questions, your answers and your work are really inspiring. Looking forward to seeing other works like that. Alessandro On Fri, Jun 10, 2011 at 7:59 PM, Alberto Jaspe wrote: > Hi, > > Thanks Alsessandro and Ulrich for your feedback :) > > Asking questions... > >> >> 1) how do you cap holes when performing dynamic clipping? >> > Every poly behind the holes is viewed by its back face. You only have to > fill any back face with an uniform color in a fragment program. > > >> >> 2) is global illumination calculated in real-time as well? >> > No. It's a precalculated radiosity solution, with some optimizations in > the scenegraph and lighting info per vertex. > >> >> 3) how did you integrated panoramas in OSG? >> > Well, we had two ways doing that. At one hand, we developed our own > panorama library, that textures any panoramic image in the inside face of a > sphere, taking care of projections, texture load, movement control, etc. > This is a good choose if you need to integrate in any way the panorama in > your 3D scene. > By the other side and in the last times we had integrated web browsing > inside our own GI system, via awesomium. So most times it were faster and > more effective using a page with a flash panorama viewer, like kr-pano. > > Bye and thanks again! > Alberto. > > -- > *Alberto Jaspe* > *Computer Graphics R&D Guy* > > http://albertojaspe.net > > > ___ > 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] [build] How to compile OSG examples with OSX 10.5 / XCode 3.0 binaries?
Hi raw, I downloaded the OpenSceneGraph-2.9.X and using CMake I generated the .xcodeproject. I compiled the Build_All and then Install. Everything seem to work fine. I am using OSX 5 Leopard with XCode 3. can you give more details please ? Mohamed ALJI -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=40382#40382 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
