Hi Cory, Have a look at the osgreflect example to see how you can set up stencil buffer usage in the OSG.
Robert. On Wed, Jul 20, 2011 at 7:27 PM, Cory Riddell <[email protected]> wrote: > Paul, thanks for the opinion. I think I'm getting close to the limits of > what I can do with OSG without knowing a thing about OpenGL (and I'm > pretty stoked about how much I was able to accomplish without really > knowing what I'm doing). > > Time to buckle down and learn some (modern) OpenGL. I'm going to start > with Joe Groff's tutorial > (http://duriansoftware.com/joe/An-intro-to-modern-OpenGL.-Table-of-Contents.html) > and build from there. > > Thanks, > Cory > > On 7/20/2011 12:00 PM, Paul Martz wrote: >> Using stencil for capping is an old trick and works well. I don't know >> of any example code for it, and it's been years, more than a decade, >> since I've done it myself. Your only other option would be some type >> of CSG approach, which would be computationally expensive, especially >> if the clip plane is dynamic. >> -Paul >> >> >> On 7/20/2011 9:48 AM, Cory Riddell wrote: >>> I've been thinking about using a ClipNode to cut my model in two to >>> expose the inside details like a cutaway drawing. Just sticking a >>> ClipNode at the root of my model graph does remove half of it, but the >>> model ends up looking hollow rather than solid. I want to cap the open >>> side. For example, if a sphere is cut in two, I would cap the open side >>> with a circle. >>> >>> A bit of searching for how to do this with OpenGL turned up this page >>> (http://glbook.gamedev.net/moglgp/advclip.asp) that caps the open side >>> using the stencil buffer. Does the technique outlined in the article >>> look like a reasonable OSG-friendly approach? Any advice or pointers to >>> other examples? Grepping the example code turns up a bunch of stencil >>> code, but I'm still a little lost (OpenGL newbie). >>> >>> Thanks, >>> Cory >> _______________________________________________ >> osg-users mailing list >> [email protected] >> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >> > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
