Hi Jeremy, Looking great so far, keep the cool NodeKits coming:)
Jason On Fri, Sep 12, 2008 at 12:34 PM, Jeremy Moles <[EMAIL PROTECTED]>wrote: > Hello folks! > > I'd like to quickly post a message here about (another! yikes!) NodeKit > I'm working on that ties closely with osgWidget and my original > intentions a year ago when I started working on osgWidget in my free > time. :) > > I've created a NodeKit that harnesses the power of the Pango engine > (it's used widely in Linux and works in Windows and Mac, leveraging the > power of Clearfont and ATSUI, respectively) for creating 2D text in > OpenGL. It caches glyphs internally using the osgCairo nodekit (another > one of mine) so that it can quickly create groups of quads to form a > string of UTF-8 text on the fly. > > Furthermore, I plan on creating two objects in osgPango: > > osgPango::Label > osgPango::Input > > ...that can be optionally built and will inherit from osgWidget::Widget, > so as to be used interchangeably with osgWidget (and adhering to the > existing API so that all that is required is a simple typedef). > > > > -------------------------------------------------------------------- > > The main purposes of this NodeKit are: > > 1. To provide nothing less than superb 2D font support for OSG > applications that need to use lots of text in an orthographic > perspective. > > 2. To caches all glyphs internally in OSG textures so that only the > first creation of a glyph requires any significant CPU time; all > subsequent use of the character is simply texturing a quad. > > 3. To support all layout options provided by Pango (text justify, > etc.) > > 4. To ensure that all quads are pixel-aligned, for maximum clarity. > > 5. Pad all glyphs iternally with one pixel of blank space so that > scaled text in OpenGL blends properly without unsightly anomalies. > > 6. Finally, to provide a clean and simple API for accessing every > piece > of information necessary to create complicated objects such as input > widgets and the like. > > -------------------------------------------------------------------- > > > > Keep in mind that just because osgPango is optimized for 2D display > constraints, this doesn't mean you can't throw an osgPango::Text object > (which is just a Geode) into a normal perspective projection (a-la > nameplates above character's names, etc.) > > I'm mainly posting this to solicit feedback and generate interest from > others who need high-quality font support in OSG. This isn't intended as > a replacement for osgText, but perhaps will demonstrate what is > "possible" to one day do with osgText. > > http://osgpango.googlecode.com > > I've got some screenshots there on the Googlecode site, so don't be > shy. :) I'm particularly proud of the outline support, which you'll see > is very high-quality. It's currently implemented as TexEnvCombine > (thanks Cedric!), but I will have a GLSL implementation soon. Check out > the justify screenshot, too... > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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