Yes I know. The magic is in the use of glAddSwapHintRectWIN which is a wgl function.
I've just tested this and it works, so you can update part of the window using plain GDI calls and do the rest with opengl. Mind you I wouldn't trust it work on all machines. It's probably less of head ache to just use separate windows... 2009/3/26 Robert Osfield <[email protected]>: > HI Simon, > > I'm afraid the OSG already uses the sissor test to make sure that the > viewport clear only affects the region of interest. It work, but the > problem Fredric has really all about the fact that the OpenGL context > affects the whole window it's assigned to. > > Robert. > > On Thu, Mar 26, 2009 at 8:59 AM, Simon Hammett <[email protected]> > wrote: >> >> This might be want you are looking for: >> >> http://factor-language.blogspot.com/2007_08_01_archive.html >> >> and >> >> >> http://factor-language.blogspot.com/2007/08/opengl-redraw-bug-on-windows.html >> >> Basically enable the scissor test, then tell OpenGl what part of the >> window to update when calling SwapBuffers. >> >> Not tried it myself though. >> >> 2009/3/26 Guy <[email protected]>: >> > Frederic, >> > I think you can't limit the OpenGL drawing to a limited region of a >> > window HANDLE. You could embed a window in the region you want to use OGL, >> > and just draw to it. Or you could first draw the OGL/OSG code, and then get >> > the window handle and draw all your other stuff using GDI or whatever. >> > >> > Guy. >> > >> > --------- >> > >> > >> > hum, the (black) color was not the problem in itself :) >> > >> > If I do this (update from my whole code): >> > gc->setClearColor( osg::Vec4f(1.2f, 0.2f, 0.6f, 1.0f) ); >> > gc->setClearMask( 0) ; >> > >> > camera->setClearColor( osg::Vec4f(0.2f, 0.2f, 1.6f, 1.0f) ); >> > camera->setClearMask( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT >> > ); >> > (that's to say: don't clear anything on gc, and fill background with >> > blue on camera), >> > >> > I have the camera successfully drawn at the right place, with blue >> > background. This is what I want for that camera. >> > BUT, the problem persists, i.e. all around the viewport, the whole >> > window is painted in black. (maybe mick jagger is singing too loud ?). >> > it is painted in pink if I enable the >> > gc->setClearMask(GL_COLOR_BUFFER_BIT). >> > >> > I can't manage to make OSG only impact the camera viewport (my blue >> > rectangle) and leave the window around unchanged... >> > Did anyone achieve to display an osgViewer::Viewer at some small place >> > in a window without overwrite window content around? >> > >> > Fred >> > >> > >> > >> > 2009/3/25 Robert Osfield <[email protected]>: >> >> On Wed, Mar 25, 2009 at 3:03 PM, Frederic Marmond <[email protected]> >> >> wrote: >> >>> >> >>> hum, it didn't work :( >> >>> >> >>> both >> >>> // gc->setClearColor( osg::Vec4f(1.2f, 0.2f, 0.6f, 1.0f) ); >> >>> // gc->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); >> >>> and >> >>> gc->setClearColor( osg::Vec4f(1.2f, 0.2f, 0.6f, 1.0f) ); >> >>> gc->setClearMask( 0 ); >> >>> >> >>> do the same: instead of the shiny pink color, the window is filled >> >>> with >> >>> black >> >>> >> >>> any other suggestion ? >> >> >> >> Well you disable the clear colour in the camera's ClearMask so perhaps >> >> this >> >> is why it's just black. >> >> >> >> Robert. >> >> >> >> _______________________________________________ >> >> 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 >> > >> >> >> >> -- >> http://www.ssTk.co.uk >> _______________________________________________ >> 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 > > -- http://www.ssTk.co.uk _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
