Re: [osg-users] custom vertex attribut, using BIND_OVERALL
Hi, I've posted a submission which should solve this issue : http://forum.openscenegraph.org/viewtopic.php?p=52849#52849 The problem was in the ArrayDispatcher.cpp file : some kind of array types (like ArrayInt you use here) where not registered with associated dispatchers. It solves my issue, could you test if it solve yours ? Thank you! Cheers, Aurelien -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=52850#52850 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] custom vertex attribut, using BIND_OVERALL
Hi, Does anyone have a solution for this issue ? Thank you! Cheers, Aurelien -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51227#51227 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] custom vertex attribut, using BIND_OVERALL
I tried everything, it only worked with bind per VERTEX. It must be an opengl issue... -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51228#51228 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] custom vertex attribut, using BIND_OVERALL
Hi all
I want to pass a custom vertex attribute (lets say a material code) to my
vertex shader.
For the moment I use BIND_PER_VERTEX:
Code:
int l_SMC = 1027; // some material code
for (unsigned int i=0; ia_geode.getNumDrawables(); ++i)
{
osg::Geometry* l_Geom = a_geode.getDrawable(i)-asGeometry();
if (l_Geom)
{
osg::Array* l_VertexArray = l_Geom-getVertexArray();
if (l_VertexArray)
{
unsigned int vertex_count = l_VertexArray-getNumElements();
osg::IntArray* l_Array = new osg::IntArray;
for (int v=0; vvertex_count; v++)
{
l_Array-push_back(l_SMC);
}
l_Geom-setVertexAttribArray(6, l_Array);
l_Geom-setVertexAttribNormalize(6, false);
l_Geom-setVertexAttribBinding(6, osg::Geometry::BIND_PER_VERTEX);
}
}
}
Since the material code is unique within geometries, so actually I would need
to transfer it only once per Geometry. If I change to BIND_OVERALL, the data is
no longer transferred, or at least my shader cannot detect it anymore. I
thought i should maybe reduce the VertexAttribArray (l_Array) to one single
entry, but this doesn't work either.
What is the correct way of passing general or common data, on a per geometry
(and not vertex) basis?
Regards
Daniel
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http://forum.openscenegraph.org/viewtopic.php?p=50745#50745
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[osg-users] custom vertex attribut, using BIND_OVERALL
Hi all
I want to pass a custom vertex attribute (lets say a material code) to my
vertex shader.
For the moment I use BIND_PER_VERTEX:
[code]
int l_SMC = 1027; // some material code
for (unsigned int i=0; ia_geode.getNumDrawables(); ++i)
{
osg::Geometry* l_Geom = a_geode.getDrawable(i)-asGeometry();
if (l_Geom)
{
osg::Array* l_VertexArray = l_Geom-getVertexArray();
if (l_VertexArray)
{
unsigned int vertex_count = l_VertexArray-getNumElements();
osg::IntArray* l_Array = new osg::IntArray;
for (int v=0; vvertex_count; v++)
{
l_Array-push_back(l_SMC);
}
l_Geom-setVertexAttribArray(6, l_Array);
l_Geom-setVertexAttribNormalize(6, false);
l_Geom-setVertexAttribBinding(6, osg::Geometry::BIND_PER_VERTEX);
}
}
}
[/code]
Since the material code is unique within geometries, so actually I would need
to transfer it only once per Geometry. If I change to BIND_OVERALL, the data is
no longer transferred, or at least my shader cannot detect it anymore. I
thought i should maybe reduce the VertexAttribArray (l_Array) to one single
entry, but this doesn't work either.
What is the correct way of passing general or common data, on a per geometry
(and not vertex) basis?
Regards
Daniel
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Re: [osg-users] custom vertex attribut, using BIND_OVERALL
Hi wouldnt it be better to use uniform in this case? Cheers. 24.10.2012, 13:28, "Daniel Schmid" daniel.sch...@swiss-simtec.ch:Hi all I want to pass a custom vertex attribute (lets say a material code) to my vertex shader. For the moment I use BIND_PER_VERTEX: [code]int l_SMC = 1027; // some material code for (unsigned int i=0; ia_geode.getNumDrawables(); ++i){ osg::Geometry* l_Geom = a_geode.getDrawable(i)-asGeometry(); if (l_Geom) { osg::Array* l_VertexArray = l_Geom-getVertexArray(); if (l_VertexArray) { unsigned int vertex_count = l_VertexArray-getNumElements(); osg::IntArray* l_Array = new osg::IntArray; for (int v=0; vvertex_count; v++) { l_Array-push_back(l_SMC); } l_Geom-setVertexAttribArray(6, l_Array); l_Geom-setVertexAttribNormalize(6, false); l_Geom-setVertexAttribBinding(6, osg::Geometry::BIND_PER_VERTEX); } }}[/code] Since the material code is unique within geometries, so actually I would need to transfer it only once per Geometry. If I change to BIND_OVERALL, the data is no longer transferred, or at least my shader cannot detect it anymore. I thought i should maybe reduce the VertexAttribArray (l_Array) to one single entry, but this doesn't work either. What is the correct way of passing general or common data, on a per geometry (and not vertex) basis? RegardsDaniel,___osg-users mailing listosg-users@lists.openscenegraph.orghttp://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org___
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Re: [osg-users] custom vertex attribut, using BIND_OVERALL
When I would use uniforms, I cannot set different values for different geometries. Uniforms are global for a particular stateset. So I HAVE to use vertex attributes, since in my shader I want to treat some particular surface in a special way, but without the need of separate stateset. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50748#50748 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] custom vertex attribut, using BIND_OVERALL
Hi Daniel, you are right, with BIND_OVERALL and just one element in the array, OSG should apply the single attribute to all vertices of the geometry. You can check this behavior in Geometry.cpp searching for BIND_OVERALL. Also there is the createTexturedQuadGeometry() function which does setup a geometry like you want, so check it out if you do it the same way. If it does not work, try to put a breakpoint into Geometry.cpp and debug to see what happens. As you say, setting Uniforms requires a state change, while with an attribute the rendering is done at the GPU completely. Thank you! Cheers, Tassilo -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50751#50751 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] custom vertex attribut, using BIND_OVERALL
Hi As you say, setting Uniforms requires a state change, while with an attribute the rendering is done at the GPU completely. it is kind of same both ways... here you need glUniform* call, there you need to bind vertex attrib and call glVertexAttribPointer* and rendering is done at the GPU completely no matter what way you choose. Cheers. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] custom vertex attribut, using BIND_OVERALL
Hi, I think OpenGL specs doesn't allow to share a vertex attribute values between multiple vertices. Aurelien -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50753#50753 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] custom vertex attribut, using BIND_OVERALL
On 10/24/2012 05:28 AM, Daniel Schmid wrote: Since the material code is unique within geometries, so actually I would need to transfer it only once per Geometry. If I change to BIND_OVERALL, the data is no longer transferred, or at least my shader cannot detect it anymore. I thought i should maybe reduce the VertexAttribArray (l_Array) to one single entry, but this doesn't work either. What is the correct way of passing general or common data, on a per geometry (and not vertex) basis? I don't think BIND_OVERALL is valid for generic attributes. Sergey's right, use a Uniform. --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] custom vertex attribut, using BIND_OVERALL
Hi, sorry, I was wrong. It really seems the same in terms of state changes. A use case for a BIND_OVERALL attribute is probably that you have different types of geometry with and without individual attributes (for example color) in your scene that you want to render using the same shader. Thank you! Cheers, Tassilo -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50759#50759 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] custom vertex attribut, using BIND_OVERALL
On Wed, Oct 24, 2012 at 12:37 PM, Sergey Polischuk pol...@yandex.ru wrote: Hi As you say, setting Uniforms requires a state change, while with an attribute the rendering is done at the GPU completely. it is kind of same both ways... here you need glUniform* call, there you need to bind vertex attrib and call glVertexAttribPointer* and rendering is done at the GPU completely no matter what way you choose. Actually, OSG could use one of the glVertexAttrib calls without binding anything. This is reputed to be a fast way to get per object data to a vertex shader. Tim Cheers. ___ 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] custom vertex attribut, using BIND_OVERALL
On 10/24/2012 11:35 AM, Jason Daly wrote: On 10/24/2012 05:28 AM, Daniel Schmid wrote: Since the material code is unique within geometries, so actually I would need to transfer it only once per Geometry. If I change to BIND_OVERALL, the data is no longer transferred, or at least my shader cannot detect it anymore. I thought i should maybe reduce the VertexAttribArray (l_Array) to one single entry, but this doesn't work either. What is the correct way of passing general or common data, on a per geometry (and not vertex) basis? I don't think BIND_OVERALL is valid for generic attributes. Sergey's right, use a Uniform. Scratch that, I'm wrong... From the man page for glVertexAttrib: If a generic vertex attribute bound to an attribute variable in a vertex shader is not updated while the vertex shader is executing, the vertex shader will repeatedly use the current value for the generic vertex attribute. So it seems that BIND_OVERALL should be working just fine. --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
