Hi James, You should be able to go directly to the Font to get the Glyph's directly. osgText::Text itself will use the Glyph values to position and size it's quads for rendering. osgText supports Kerning so this affects the position of text characters as well.
Robert. On 2 May 2012 17:13, James Turner <[email protected]> wrote: > Hi, > > I'm trying to port some existing code to use osgText instead of a previous > font-rendering library, and hitting up against the osgText API. In > particular, I'm struggling to measure text without setting it on a > osgText::Text instance. > > I guess this is because the font-size and pixel size (and even transformation > matrix?) must be known to compute a size, but the code I'm coming from > frequently does things like: > > double width = widthOfString("lorum ipsum etc"); > // or indeed, height of the string > > if (width > blah) { > ... take some action > } else { > ... take some radically different action > } > > The problem is if start setting line-wrapping or a maximum width on the > osgText::Text, it seems as if the computed bounding box is going to respect > those values. I think I need a way to measure the glyph bounds as if line > wrapping / maximum sizes were ignored. (Without saving / resetting / > restoring them) > > (There's also the issue of needed to create the text-node to perform the > measurement at all, but I guess I can't escape that) > > Am I missing some API features, or is this simply not possible? > > BTW, all this text will be drawn with no scaling / rotation, in screen-space, > with orthographic projection. I realise osgText can't assume that in the > general case, of course. So, for example, if I could abuse the Font API to > measure glyph bounds, that might work quite well for me. > > James > > > > _______________________________________________ > 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
