[osg-users] Confused by rendering loop
Hi, I'm using some profiling tools to try to understand how to optimize an OSG application built on osgviewer. In fact, for the purpose of this question, I am just running osgview cow.osg. When I look at the rendering calls, I can see that glDrawArrays get's called around 4000 times at application startup, but this quickly drops down to 0 calls after about 1 second. I can see that there are ~1500 vertices reported, but this number also drops off to zero after 1 second. However, I can see that the GPU cores are kept busy constantly, and I achieve a frame rate of 120fps after an initial ramp of about 1s also (corresponds to the drop off in dlDraw calls). What confuses me most is that I would expect the nmuber of glDrawArray calls to remain relatively constant throughout the application lifetime, as the cow data model is not changing. Am I missing something? Thank you! Cheers, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53542#53542 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgviewer render loop profiling
Hi, I think I see why. It seems that osgviewer is using display lists for drawing. Thank you! Cheers, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53543#53543 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgviewer render loop profiling
Thanks Robert - that explains what I'm seeing, -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=53545#53545 ___ 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, 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 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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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
[osg-users] Skybox blocks out other model data
Hi, I have an OSG app setup where I load in a relatively large model. The bounding sphere is centered at 0,0,0 with a radius of 5. I have copied the skybox code from the osgvertexprogram, and set the radius of the sphere to 100,000. However, when I run the app now, All I see is the skybox. If I change the state to see un-filled polygons, I can see the model data as well as the sky box, so it seems the skybox is over-writing the model data. The stats 's' also shows that all of the model data polygons are being processed and drawn. So my question is, why is my skybox overwriting my model pixels? I've followed the code exactly as per the osgvertexprogram. Any ideas please? Thank you! Cheers, Paul -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51267#51267 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Skybox blocks out other model data
Found the answer. The code in the example resets the depth buffer to 1.0 before drawing the skybox. This means that all depth info is effectively cleared from the z buffer, and the skybox overwrites everything then. Not sure how this code worked in the example, but removed the z-clear from my code made the skybox work perfectly. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51419#51419 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
