Hi Jeff, Is there a reason for using 1.0? 2.2 is better alround, and it far easier for us to support your usage of as 1.0 is almost 2 years past.
As for your particular problem, wanting the eye point in world coordinates can be derived from the CullVisitor's current ModelViewMatrix * Inverse(ViewMatrix). Also please note that the multiplication order in the OSG is: v' = v * M; Robert. On 10/17/07, Jeffrey M Short <[EMAIL PROTECTED]> wrote: > > Hello > > First off I'm using OSG 1.0. > > I am deriving a class from osg::Drawable::CullCallback. I'm overloading > the cull function [virtual bool cull(osg::NodeVisitor* nv, osg::Drawable* > drawable, osg::State*) const]. I am trying to get the eye location in > World Coordinates. It seems as though CullVisitor::getEyePoint() returns > the eye location in Local Coords. I've tried tried multiplying by > osg::computeLocalToWorld(nv->getNodePath()) and > osg::computeWorldToLocal(nv->getNodePath()), but I've had no success. > > In some cases, I already know that my drawable has one MatrixTransform > above it so I calculate the following: > osg::Matrixd::inverse(xfrom->getMatrix()) * osg::Vec4d(nv->getEyePoint(), > 1). This works. But it won't work for cases when there's more than 1 > Transfrom on the nodepath. That's why I was trying > osg::computeLocalToWorld. The best thing would be to get the eye point in > world coordinates directly without having to calculate it repeatedly from > local coordinates in each drawable's CullCallback. Any suggestions? > > > Also I want to reply to some response made to other questions I have > submitted. How do I do that? > > Thank you, > Jeff > > Computer Sciences Corporation > Registered Office: 2100 East Grand Avenue, El Segundo California 90245, USA > Registered in USA No: C-489-59 > > ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > This is a PRIVATE message. If you are not the intended recipient, please > delete without copying and kindly advise us by e-mail of the mistake in > delivery. > NOTE: Regardless of content, this e-mail shall not operate to bind CSC to > any order or other contract unless pursuant to explicit written agreement > or government initiative expressly permitting the use of e-mail for such > purpose. > ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > > > _______________________________________________ > 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
