Re: [osg-users] Does OSG support ES2.0?
Hi Preet, that worked a treat! I now have the statistics text workong on ES2 for my app! Thank you! Cheers, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51998#51998 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Does OSG support ES2.0?
Hi Paul, On Tue, Jan 8, 2013 at 8:20 AM, Paul Heraty heratyp...@eircom.net wrote: Hi Preet, Do you have a copy of the shaders in that code that you can share please: shaders/NoShading_vert.glsl shaders/NoShading_frag.glsl They are in the same repo: https://github.com/preet/scratch/tree/master/openscenegraph/osg_text_geometry/shaders Preet ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Does OSG support ES2.0?
Hi Preet, Do you have a copy of the shaders in that code that you can share please: shaders/NoShading_vert.glsl shaders/NoShading_frag.glsl Thank you! Cheers, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51841#51841 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Does OSG support ES2.0?
Hi,
According to the 3.0 release notes, OSG introduces support for OpenGL ES 1.1,
OpenGL ES 2.0.
I'm using OSG 3.1.1, and I have built an application which works fine when I
compile OSG to use OpenGL. It's a pretty simple app that reads in a textured
3DS model and displays it.
However, when I recompile OSG to use OpenGL ES2.0, the same application doesn't
work so well. For example, the statistics text that appears from the
osgViewer::StatsHandler does not appear at all, and I get lots of messages such
as:
Warning: detected OpenGL error 'invalid enumerant' after applying GLMode 0x4000
Warning: Light::apply(State) - not supported
Warning: Material::apply(State) - not supported
Warning: TexEnvCombine::apply(State) - not supported
Warning: TexGen::apply(State) - not supported
Warning: TexMat::apply(State) - not supported
I've tried using the default OSG shaders and my own custom ones, but I get the
same issues.
For reference, my (simple) shaders are:
Code:
varying mediump vec4 col;
varying mediump vec2 texcoord;
uniform mat4 osg_ModelViewProjectionMatrix;
attribute vec4 osg_MultiTexCoord0;
attribute vec4 osg_Color;
attribute vec4 osg_Vertex;
void main() {
gl_Position = osg_ModelViewProjectionMatrix * osg_Vertex;
texcoord = osg_MultiTexCoord0.st;
col = osg_Color;
}
and
Code:
varying mediump vec4 col;
varying mediump vec2 texcoord;
uniform sampler2D diffuseMap;
void main()
{
vec4 base = texture2D(diffuseMap, texcoord);
vec4 color = base;
color *= col;
gl_FragColor = color;
}
When I search the forums, I see lots of posts where people faced similar
problems. But it's unclear how many of these problems have been 'fixed' in the
main OSG code now.
So my question is: does the latest OSG (3.1.1) work with GLES2.0 or not?
If it doesn't work 'out of the box', is there a document or example anywhere
that shows how to display a 3ds model in ES2.0?
Thank you!
Cheers,
Paul
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Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=51768#51768
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Re: [osg-users] Does OSG support ES2.0?
OSG core works from the box what doesn't work from the box is osgText and other things that require the user to include his own shader to make work things. I have code that replaces the estandard stats handler with one 100% compatible with GLES 2.0 BUT it's not something that we can include in OSG because a more general solution is needed. If you want to use those features simply include a shader that complies with GLSL/gles2 standard. 3ds can be rendered en GLES 1.0 and 2.0. Either you haven't included the plugin and used the static initializer (if you are in Iphone or Android) of the plugin or you have a model that uses some caracteristics not presented in gles 2.0 like DXT compressed textures (something that we can't do a thing) So... first check if the model is even loaded and if OSG complains about it. 2013/1/4 Paul Heraty heratyp...@eircom.net en I search the forums, I see lots of posts where people faced similar problems. But it's unclear how many of these problems have been 'fixed' in the main OSG code now. So my question is: does the latest OSG (3.1.1) work with GLES2.0 or not? If it doesn't work 'out of the box', is there a document or example anywhere that shows how to display a 3ds model in ES2.0? Thank you! ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Does OSG support ES2.0?
Hi Jorge, first off, thanks for the quick reply! My model is being read in correctly. In fact, I can display it using the shaders I've attached above. What I'm concerned about are two things: 1/ Why all the warnings appear that I posted above? I attached the shader program to the root node, so I would not expect any other shaders to be used other than what I provide. Looking through the LogFileHandler text, I can see the model being read, my shaders being compiled etc. So where are all the other Light/Material/Tex*::apply(State) coming from? How can I remove them? I'm guessing there's still some default states being set by OSG? 2/ The stats handler text does not work. Would you be willing to share the code you have for this please? Thank you! Cheers, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51770#51770 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Does OSG support ES2.0?
Hi, after removing everything from my SG except the node with the 3DS model, I now see only a few warnings in the logfile. After the shaders are compiled and textures loaded, I get Code: Warning: detected OpenGL error 'invalid enumerant' at After Renderer::compile openGL extension '' is not supported. Setting up osg::Camera::FRAME_BUFFER ShaderComposer::~ShaderComposer() 0x8c34ff0 Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..) openGL extension '' is not supported. Setting up osg::Camera::FRAME_BUFFER Then I seem to get one of the RenderBin::draw(..) warnings per frame from then on. Also, the text is still not working, so I'd really appreciate that if possible :) Thank you! Cheers, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51772#51772 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Does OSG support ES2.0?
osg Text is really easy to make it work with ogl, you have to use a shaders that is inherited by the osgText node that can read from texture and that's pretty much all. The other errors... well openGL extension is not supported will be probably because it needs some qualifier that it's not included. Which extension is? I don't know... when i've had those things i had to recompile several times OSG until I knew from where it comes and then fix it. If you have a graphical debugger then you'll probalby find the invalid enumerant by searching the operation code. 2013/1/4 Paul Heraty heratyp...@eircom.net Hi, after removing everything from my SG except the node with the 3DS model, I now see only a few warnings in the logfile. After the shaders are compiled and textures loaded, I get Code: Warning: detected OpenGL error 'invalid enumerant' at After Renderer::compile openGL extension '' is not supported. Setting up osg::Camera::FRAME_BUFFER ShaderComposer::~ShaderComposer() 0x8c34ff0 Warning: detected OpenGL error 'invalid enumerant' at after RenderBin::draw(..) openGL extension '' is not supported. Setting up osg::Camera::FRAME_BUFFER Then I seem to get one of the RenderBin::draw(..) warnings per frame from then on. Also, the text is still not working, so I'd really appreciate that if possible :) Thank you! Cheers, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51772#51772 ___ 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] Does OSG support ES2.0?
To follow up on Jorge's reply:
Here's an example of how you can use shaders for osgText:
https://github.com/preet/scratch/blob/master/openscenegraph/osg_text_geometry/main_old.cpp
If you're still having issues, increase the OSG debugging output:
(osg::setDebugNotify(...)) and
osgViewer::getCamera()-getGraphicsContext()-getState()-
setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE)
to try and get a bit more info on the error. Something like APITrace (
https://github.com/apitrace/apitrace) might help too if you can get it
running on the target platform.
To get textures working properly on my platform I had to make a couple of
changes to the source. Unfortunately, for some stupid reason I accidentally
scrubbed the git history so I don't really have diffs of all the changes I
made. One specific thing I remember was having to set _glMaxTextureCoords =
1 in /src/osg/State.cpp to get textures working on my device.
Replace the if clause on line 900 with:
if ( osg::getGLVersionNumber() = 2.0 ||
osg::isGLExtensionSupported(_contextID,GL_ARB_vertex_shader) ||
OSG_GLES2_FEATURES)
{
glGetIntegerv(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS,_glMaxTextureUnits);
#ifdef OSG_GLES2_AVAILABLE
_glMaxTextureCoords = 1;
#else
glGetIntegerv(GL_MAX_TEXTURE_COORDS,_glMaxTextureCoords);
#endif
}
Preet
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