[osg-users] Frustum specialists look here.

Adrian Egli 3dhelp at gmail.com
Thu Oct 18 00:47:38 PDT 2007


is the appliction based on the osgViewer? or producer ?

sorry i still not understand what are the differents, same code used for
both version (i guess)

2007/10/18, Johan Johnsson <johanj at autosim.no>:
>
>          double left   = ((ch.frustum.left)   * ch.frustum.nearClipping /
> abs( ch.frustum.distance));
>          double right  = ((ch.frustum.right)  * ch.frustum.nearClipping /
> abs( ch.frustum.distance));
>          double top    = ((ch.frustum.top)    * ch.frustum.nearClipping /
> abs( ch.frustum.distance));
>          double bottom = ((ch.frustum.bottom) * ch.frustum.nearClipping /
> abs( ch.frustum.distance));
>
>          camera->setGraphicsContext(gc.get());
>          camera->setProjectionMatrixAsFrustum(left, right, bottom, top,
> ch.frustum.nearClipping,                        ch.frustum.farClipping);
>
> // offset comes further down.
>
>
>
> On Thu, 18 Oct 2007 09:39:53 +0200, Adrian Egli <3dhelp at gmail.com> wrote:
>
> > Hi Johan,
> >
> > quite hard to estimate what's going wrong, how do calc the projection
> > matrix, near far clipp, viewmatrix, and so on.
> >
> > /adegli
> >
> > 2007/10/18, Johan Johnsson <eslave at gmail.com>:
> >>
> >> Hei !
> >>
> >> I dont know if its actually possible to tell exactly where the
> >> difference
> >> is when comparing two viewfrustums.
> >> We did get another frustum after the migration from osg1x to osg2x.
> >> I attach 2 pictures showing them. (they get exactly the same values,
> >> from
> >> a config file)
> >>
> >> --
> >> Mr. Johan Johnsson
> >> AutoSim AS, Strandveien 106, 9006 Tromsø
> >> Visit us at http://www.autosim.no
> >> _______________________________________________
> >> osg-users mailing list
> >> osg-users at lists.openscenegraph.org
> >>
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
> >>
> >>
> >>
> >
> >
>
>
>
> --
> Mr. Johan Johnsson
> AutoSim AS, Strandveien 106, 9006 Tromsø
> Visit us at http://www.autosim.no
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>



-- 
********************************************
Adrian Egli
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