Hello,
I came back with this problem of first/third view person.
Paul, following is what I did, and it doesn't give me what I was expecting.
So, can you be more precise regarding "the inverse of the cow's
transformation"?
cViewer = new osgViewer::CompositeViewer();
osg::ref_ptr<osg::Group> root = new osg::Group;
root->addChild(makeFrustumFromCamera(NULL));
root->addChild(mscene->getScene());
// Create View 0 -- Just the loaded model.
{
osg::ref_ptr<osgViewer::View> view = new osgViewer::View;
cViewer->addView(view.get());
view->setUpViewInWindow(10, 10, 640, 480);
view->setSceneData(_root.get());
view->setCameraManipulator(new osgGA::TrackballManipulator);
/*******************/
//take the inverse of the model's transformation and set it as the
view matrix to see what the model see
osg::Matrixd proj =
cViewer->getView(0)->getCamera()->getProjectionMatrix();
osg::Matrixd mv = cViewer->getView(0)->getCamera()->getViewMatrix();
osg::MatrixTransform* mt = new osg::MatrixTransform;
mt->setMatrix(osg::Matrixd::inverse(mv));
view->setSceneData(mt);
//this step inverts the wireframe on the view 1!
}
// Create view 1 -- Contains the loaded moel, as well as a wireframe frustum
derived from View 0's Camera.
{
osg::ref_ptr<osgViewer::View> view = new osgViewer::View;
cViewer->addView(view.get());
view->setUpViewInWindow(10, 510, 640, 480);
view->setSceneData(root.get());
view->setCameraManipulator(new osgGA::TrackballManipulator);
}
// Update the wireframe frustum, we need to find a way to adapt the
mainwindow and not create other instance
while (!cViewer->done()){
root->removeChild(0, 1);
root->insertChild(0,
makeFrustumFromCamera(cViewer->getView(0)->getCamera()));
cViewer->frame();
}
I want to see what the cow see in the view 0.
The view 1 contains a wireframe which starts on the eyes of the model and
shows us the view 0 (view 1 = the third view person)
So, from the view 0, I can see the scene (since the eye of the model) but
not the model (view 0 = the first view person).
Thanks in advance for your help.
Jon
_____
For a view of what the cow is seeing, take the inverse of the cow's
transformation and set it as the view matrix.
Hope that helps,
-Paul
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