Hello at all,
I'm currently working on frustum-culling for a roam-algorithm-implemetation.
Maybe someone can give me a hint what I'm missing to nail my problem down.
I want to calculate the x,y-coordinates for a vertex on the screen. My
approach (only for testing, to nail down the problem):
<code>
osg::Matrixd mv = osg::Matrixd::identity();
osg::Matrixd mp = osg::Matrixd::identity();
osg::Matrixd mw = osg::Matrixd::identity();
while( !viewer.done() )
{
viewer.frame();
if (viewer.getCameraWithFocus())
{
mv = viewer.getCameraWithFocus()->getViewMatrix();
mp = viewer.getCameraWithFocus()->getProjectionMatrix();
mw = viewer.getCameraWithFocus()->getViewport()->computeWindowMatrix();
}
}
osg::Vec4d v = osg::Vec4d(0, 0, 0, 1.0);
v = v * mv;
v.normalize();
v = v * mp * mw;
</code>
Schould this give me the last-coordinates of v on the screen, when pressing
"ESC" so the viewer terminates? I know this code only works, if the window has
the focus at termination-time, this is not the problem why I'm asking.
Best regards,
Oli
--
Oliver Burtchen, Berlin
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