Re: [osg-users] Increasing line width
Chris Hanson wrote: On Wed, Oct 17, 2012 at 9:18 AM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC () wrote: Take a look at the createAxis() in the osgbillboard.cpp file for the osgbillboard example. There's code in there to set linewidth... Rather than altering the model (which break displaylists or other compiled geometry representations and requires DYNAMIC datavariance) I recommend re-drawing the highlighted part one more time, after the rest of the model has drawn itself. You can usually use a nodemask to perform this trick. You may wish to clone the original entity, set the line width wider, and draw that clone, so you don't disrupt the state of the original. Set your Z-buffer depth test to GL_LEQUAL so that re-drawing the same part actually draws it again, over top of the copy already represented in the Z-buffer. -- Chris 'Xenon' Hanson, omo sanza lettere. http://www.alphapixel.com/ (http://www.alphapixel.com/) Training • Consulting • Contracting 3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 • GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL Digital Imaging • GIS • GPS • Telemetry • Cryptography • Digital Audio • LIDAR • Kinect • Embedded • Mobile • iPhone/iPad/iOS • Android -- Post generated by Mail2Forum Yes, cloning entity and setting linewidth to higher number works, only problem is with cloning big entity, its slow operation for realtime highlighting. I was wondering if this can be achieved without cloning entire entity. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50708#50708 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Increasing line width
Yes, cloning entity and setting linewidth to higher number works, only problem is with cloning big entity, its slow operation for realtime highlighting. I was wondering if this can be achieved without cloning entire entity. Well, if you can use shaders or stencil buffers, you could write to a separate mask channel (multiple render targets) during the original render pass, and then do some sort of post-processing operation afterward. But it's probably just as easy to stick a stateset with an osg::LineWidth ( http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a00391.html ) above the selected model, with the stateset set to OVERRIDE. -- Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com http://www.alphapixel.com/ Training • Consulting • Contracting 3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 • GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL Digital Imaging • GIS • GPS • Telemetry • Cryptography • Digital Audio • LIDAR • Kinect • Embedded • Mobile • iPhone/iPad/iOS • Android ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Increasing line width
Hi, I want to highlight part of CAD model. I have big symbol with lines, that have different line width. Now I want to render that lines with +4.0f linewidth according to original width of every line. What is the best approach? Thank you! Cheers, Filip -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50642#50642 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Increasing line width
Take a look at the createAxis() in the osgbillboard.cpp file for the osgbillboard example. There's code in there to set linewidth... -Shayne -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Filip Arlet Sent: Wednesday, October 17, 2012 3:55 AM To: osg-users@lists.openscenegraph.org Subject: [osg-users] Increasing line width Hi, I want to highlight part of CAD model. I have big symbol with lines, that have different line width. Now I want to render that lines with +4.0f linewidth according to original width of every line. What is the best approach? Thank you! Cheers, Filip -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50642#50642 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.or g ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Increasing line width
On Wed, Oct 17, 2012 at 9:18 AM, Tueller, Shayne R Civ USAF AFMC 519 SMXS/MXDEC shayne.tuel...@hill.af.mil wrote: Take a look at the createAxis() in the osgbillboard.cpp file for the osgbillboard example. There's code in there to set linewidth... Rather than altering the model (which break displaylists or other compiled geometry representations and requires DYNAMIC datavariance) I recommend re-drawing the highlighted part one more time, after the rest of the model has drawn itself. You can usually use a nodemask to perform this trick. You may wish to clone the original entity, set the line width wider, and draw that clone, so you don't disrupt the state of the original. Set your Z-buffer depth test to GL_LEQUAL so that re-drawing the same part actually draws it again, over top of the copy already represented in the Z-buffer. -- Chris 'Xenon' Hanson, omo sanza lettere. xe...@alphapixel.com http://www.alphapixel.com/ Training • Consulting • Contracting 3D • Scene Graphs (Open Scene Graph/OSG) • OpenGL 2 • OpenGL 3 • OpenGL 4 • GLSL • OpenGL ES 1 • OpenGL ES 2 • OpenCL Digital Imaging • GIS • GPS • Telemetry • Cryptography • Digital Audio • LIDAR • Kinect • Embedded • Mobile • iPhone/iPad/iOS • Android ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
