Hi Lv, osgText::Text implementation is very pretty old now, with a design driven by the needs of very old hardware. If I were to rewrite osgText I would not implement it the has been. I would not recommend adding OpenGL coding into osgText::Text as this breaks OSG's ability to do lazy state updating.
Robert. On 27 October 2015 at 16:48, Lv Qing <[email protected]> wrote: > Thx!Robert! > > The situation is,we have modified the text.cpp to create some other > styles rather than boundingbox. > > Like a BoundingLine,one end to one of the corner of a BoundingBox,the > other end linked to a osg::Node. > > So if a text have a BoundingLine and a BoundingBox,I just want draw the > BoundingBox as normal,but draw the BoundingLine with LineStipple .So I > think one osg::StateSet may not solve this problem. > > I am not quiet familiar with the openGL programming since I use osg at > first.I search the web found people use this code to set > Linewidth and Stipple > > glLineWidth (2.0); > glLineStipple (1, 0x0F0F); > > And I look into text.cpp,found lots of code like use openGL directly,such > as : > > //glClear(GL_STENCIL_BUFFER_BIT); > > // enable stencil buffer > glEnable(GL_STENCIL_TEST); > > // write a one to the stencil buffer everywhere we are about to draw > glStencilFunc(GL_ALWAYS, 1, 1); > > // write only to the stencil buffer if we pass the depth test > glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE); > > // Disable writing to the color buffer so we only write to the stencil > // buffer and the depth buffer > glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); > > // make sure the depth buffer is enabled > // glEnable(GL_DEPTH_TEST); > // glDepthMask(GL_TRUE); > // glDepthFunc(GL_LESS); > > // Arrrgh! Why does the code only seem to work correctly if I call > this? > glDepthMask(GL_FALSE); > > > > So I think use the openGL code to draw different style may be the qucik > way. > > > > > ... > > Thank you! > > Cheers, > Lv > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=65462#65462 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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