[osg-users] antialiased lines
Hi OSG developers! I'm trying to draw antialiased lines with OSG ver .2.2, but I'm having problems. This is my code: osg::ref_ptrosg::Hint antialiasHint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_NICEST); StateSet-setAttributeAndModes(antialiasHint.get(), osg::StateAttribute::ON); Obviously I've also set a blending function. Is there something wrong in my code, or a well-known bug in OSG 2.2? Note that in OSG ver. 1.2 I obtained the same effect just by calling: StateSet-setMode(GL_LINE_SMOOTH, osg::StateAttribute::ON); This still does work in OSG ver 2.2, but I wanted to update my code to the correct use of glHint under OSG. Thank you in advance. Gianluca Natale ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] antialiased lines
Hi Gianluca, The OSG just passes state along to the OpenGL, the glHint support is just another means to setting OpenGL state. How the OpenGL driver responds to the that State is down to the driver/hardware. In the case of line smoothing I believe that you still need to enable GL_LINE_SMOOTH even when using the hints, the mode simply enables the use of filtering that the hints specify. Robert. On Thu, Apr 24, 2008 at 11:20 AM, Gianluca Natale [EMAIL PROTECTED] wrote: Hi OSG developers! I'm trying to draw antialiased lines with OSG ver .2.2, but I'm having problems. This is my code: osg::ref_ptrosg::Hint antialiasHint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_NICEST); StateSet-setAttributeAndModes(antialiasHint.get(), osg::StateAttribute::ON); Obviously I've also set a blending function. Is there something wrong in my code, or a well-known bug in OSG 2.2? Note that in OSG ver. 1.2 I obtained the same effect just by calling: StateSet-setMode(GL_LINE_SMOOTH, osg::StateAttribute::ON); This still does work in OSG ver 2.2, but I wanted to update my code to the correct use of glHint under OSG. Thank you in advance. Gianluca Natale ___ 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] antialiased lines
Ciao Gialluca, you absolutely need to enable GL_LINE_SMOOTH and GL_BLEND and to setup a blending function like for example osg::BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA). The same goes for GL_POINT_SMOOTH. Michele On Thu, Apr 24, 2008 at 12:20 PM, Gianluca Natale [EMAIL PROTECTED] wrote: Hi OSG developers! I'm trying to draw antialiased lines with OSG ver .2.2, but I'm having problems. This is my code: osg::ref_ptrosg::Hint antialiasHint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_NICEST); StateSet-setAttributeAndModes(antialiasHint.get(), osg::StateAttribute::ON); Obviously I've also set a blending function. Is there something wrong in my code, or a well-known bug in OSG 2.2? Note that in OSG ver. 1.2 I obtained the same effect just by calling: StateSet-setMode(GL_LINE_SMOOTH, osg::StateAttribute::ON); This still does work in OSG ver 2.2, but I wanted to update my code to the correct use of glHint under OSG. Thank you in advance. Gianluca Natale ___ 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] antialiased lines
Thank you. So, the filter specified via osg::Hint can be set only from OSG ver. 2.0, isn't it? Gianluca -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: Thursday, April 24, 2008 12:35 PM To: OpenSceneGraph Users Subject: Re: [osg-users] antialiased lines Hi Gianluca, The OSG just passes state along to the OpenGL, the glHint support is just another means to setting OpenGL state. How the OpenGL driver responds to the that State is down to the driver/hardware. In the case of line smoothing I believe that you still need to enable GL_LINE_SMOOTH even when using the hints, the mode simply enables the use of filtering that the hints specify. Robert. On Thu, Apr 24, 2008 at 11:20 AM, Gianluca Natale [EMAIL PROTECTED] wrote: Hi OSG developers! I'm trying to draw antialiased lines with OSG ver .2.2, but I'm having problems. This is my code: osg::ref_ptrosg::Hint antialiasHint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_NICEST); StateSet-setAttributeAndModes(antialiasHint.get(), osg::StateAttribute::ON); Obviously I've also set a blending function. Is there something wrong in my code, or a well-known bug in OSG 2.2? Note that in OSG ver. 1.2 I obtained the same effect just by calling: StateSet-setMode(GL_LINE_SMOOTH, osg::StateAttribute::ON); This still does work in OSG ver 2.2, but I wanted to update my code to the correct use of glHint under OSG. Thank you in advance. Gianluca Natale ___ 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 -- No virus found in this incoming message. Checked by AVG. Version: 7.5.524 / Virus Database: 269.23.4/1394 - Release Date: 23/04/2008 19.16 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
