Re: [osg-users] VBO and vertex attribute data
Hi Janna, can you provide the bits of your code where you setup the attributes in the c++ code and the GLSL part where you access it? I've been using this feature for tangent-space attributes like forever and it simply works. The only thing to keep in mind is the slot numbers and names you are using. Hi, I've tried to use gl_MultiTexCoord1 and do geometry-setTexCoordArray(1, secondTexCoords); instead of custom vertex attributes to pass my data and it seems to be working. Does anyone know if there is some kind of problem with using custom vertex attributes ( using methods like setVertexAttribArray ) and VBOs? Cheers, Janna -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50390#50390 ___ 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] VBO and vertex attribute data
Hi Sebastian, I set the vertex attribute array this way: Code: geometry-setVertexAttribArray(s_attributeIndex, m_vertexAttributes.get()); geometry-setVertexAttribBinding(s_attributeIndex, osg::Geometry::BIND_PER_VERTEX); geometry-setVertexAttribNormalize(s_attributeIndex, GL_FALSE); and then set up VBO Code: geometry-setUseVertexBufferObjects(true); binding attribute Code: program-addBindAttribLocation(vxOSG_HeightFieldParams, VxOSG::VxHeightFieldDisplayNode::s_attributeIndex); and in the update Code: // set dirty on arrays for VBO update vertices-dirty(); normals-dirty(); geometry-dirtyBound(); also I update custom attributes like this Code: (*m_vertexAttributes)[index][inEntryID] = inEntryValue; s_attributeIndex = 15 maybe I am missing something? I've tried to use tex coord array 2 and it seems to be working. But I would like to understand why custom vertex attribute is not working with vbo. I have a feeling that I need to set custom attribute array to dirty somehow. Thank you! Janna -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50411#50411 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VBO and vertex attribute data
Btw I am using osg 2.8.3-4, not sure if it could make any difference -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50412#50412 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VBO and vertex attribute data
Ok I think it is working now with eometry-getVertexAttribArray(s_attributeIndex)-dirty(); Thank you :) -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50413#50413 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VBO and vertex attribute data
Hello Janna, If you use a shader program you'll have to bind the attributes to the program: const std::string name=v_tangent program-addBindAttribLocation(name, index); Then in the vertex shader you can access the attribute via: attribute vec3 v_tangent; hth Sebastian Hi, I am working on optimizing existing code for height field. I've enabled VBO for height field geometry which seems to make draw time faster however it seems can not retrieve vertex attribute data in the vertex shader anymore. Is there a special way of using VBO with geometry which has additional vertex attribute data set up? Data is set up on vertex attribute array with the index 15. Thank you! Cheers, Janna -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50382#50382 ___ 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] VBO and vertex attribute data
This is being done and as I mention it works fine unless I try to use vertex buffer object. so lets say code like this works: Code: geometry-setVertexAttribArray(s_attributeIndex, m_vertexAttributes.get()); geometry-setVertexAttribBinding(s_attributeIndex, osg::Geometry::BIND_PER_VERTEX); geometry-setVertexAttribNormalize(s_attributeIndex, GL_FALSE); but I can not access custom attribute in the shader anymore with the code like this: Code: geometry-setUseVertexBufferObjects(true); geometry-setVertexAttribArray(s_attributeIndex, m_vertexAttributes.get()); geometry-setVertexAttribBinding(s_attributeIndex, osg::Geometry::BIND_PER_VERTEX); geometry-setVertexAttribNormalize(s_attributeIndex, GL_FALSE); s_attributeIndex is 15. Cheers, Janna -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50388#50388 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] VBO and vertex attribute data
Hi, I've tried to use gl_MultiTexCoord1 and do geometry-setTexCoordArray(1, secondTexCoords); instead of custom vertex attributes to pass my data and it seems to be working. Does anyone know if there is some kind of problem with using custom vertex attributes ( using methods like setVertexAttribArray ) and VBOs? Cheers, Janna -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50390#50390 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
