Re: [osg-users] Light Position Behavior
HI Ryan, It's the CameraManipulator that will be setting the view matrix per frame, and it is what is using the bounding volume of the scene graph to set it's initial position. If you have a camera manipulator attached to the viewer on end of each update traversal the view matrix from the camera manipulator will be copied to the camera's view matrix overwritting what you are setting manually, unless you do it after the updateTraversal() (note frame() encompasses advance(); eventTraversal();updateTraversal();renderinTraversals()); If you want to use Camera::setViewerMatrix*() methods then you to need to create your viewer without attached a CameraManipulator, and by default this is what the viewer does unless you call viewer.run() as viewer.run() has a fallback of attaching a TrackballManipulator is nothing else is setting the camera viewer matrix. If you call viewer.realize() and run the frame loop yourself then you won't get this auto added camera manipulator. My guess is that you still might be happy using the CameraManipulator if only it didn't use the whole bounding sphere. For this you can just use: viewer.getCameraManipualtor()->setHomePosition(eye, look, up); But you'll need to call this after the setSceneData() as this it'll be the setSceneData() that is prompting the camera manipulator to do it's stuff. You follow up email about setUpViewerAsEmbeded() is just a distraction, it's not related to the problem in hand. Robert. On Thu, Dec 18, 2008 at 1:01 AM, Ryan Morris wrote: > I understand that positioning the camera SHOULD fix my problem, but it > isn't. I have the light positioned at (0,0,100,1) and even after i set my > camera with setViewMatrixAsLookAt it is still trying to view the entire > bounding box of the scene. This is the fix i was looking for when i started > the post =) Looking forward to some guidance! Thanks! > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Light Position Behavior
it seems that by using setUpViewerAsEmbeddedInwindow() it does not reposition based on the world's bounding sphere. interesting for those who didn't already know that. Anyway hope this helps someone else! -Rusty On Wed, Dec 17, 2008 at 5:01 PM, Ryan Morris wrote: > I understand that positioning the camera SHOULD fix my problem, but it > isn't. I have the light positioned at (0,0,100,1) and even after i set my > camera with setViewMatrixAsLookAt it is still trying to view the entire > bounding box of the scene. This is the fix i was looking for when i started > the post =) Looking forward to some guidance! Thanks! > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Light Position Behavior
I understand that positioning the camera SHOULD fix my problem, but it isn't. I have the light positioned at (0,0,100,1) and even after i set my camera with setViewMatrixAsLookAt it is still trying to view the entire bounding box of the scene. This is the fix i was looking for when i started the post =) Looking forward to some guidance! Thanks! ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Light Position Behavior
HI Ryan, This problem will be down to the camera manipulators setting their default mode position based on the total bounding sphere that encloses your whole scene including lights. Setting the home position of the camera manipulators directly would be one way of tackling this problem. Robert. On Tue, Dec 16, 2008 at 3:08 AM, Ryan Morris wrote: > OSG Community, > I'm experiencing a strange behavior when I do a setPosition on my > osg::Light. For one, I'm trying to create a sun like light and it doesn't > seem to work. but the real problem I'm having is that my viewer zooms way > out when I give my light a position like (0.0,0.0,100.0,1.0). Just an > example, but if any of the coordinates are larger than 50 or so the viewer > adjusts itself, even though i'm manually setting the camera. Any help would > be great! > -Rusty > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Light Position Behavior
Hi Ryan, If you want to create lighting model like sun, that's not important how far away your sun model. I think you are creating a sphere for representing sun model and you use same coordinate position for sun model and light source position. You can prefer allocate light source position far away from your scene and allocate sun model closer for your scene. That's not change your sun models lightening operation if you want to see sun model when you look above the sky :) Or with simple changing on manipulator home position setting, you can set your asked viewing frustum. HTH.Best Regards. 2008/12/16 Ryan Morris > OSG Community, > I'm experiencing a strange behavior when I do a setPosition on my > osg::Light. For one, I'm trying to create a sun like light and it doesn't > seem to work. but the real problem I'm having is that my viewer zooms way > out when I give my light a position like (0.0,0.0,100.0,1.0). Just an > example, but if any of the coordinates are larger than 50 or so the viewer > adjusts itself, even though i'm manually setting the camera. Any help would > be great! > -Rusty > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- Ümit Uzun ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Light Position Behavior
OSG Community, I'm experiencing a strange behavior when I do a setPosition on my osg::Light. For one, I'm trying to create a sun like light and it doesn't seem to work. but the real problem I'm having is that my viewer zooms way out when I give my light a position like (0.0,0.0,100.0,1.0). Just an example, but if any of the coordinates are larger than 50 or so the viewer adjusts itself, even though i'm manually setting the camera. Any help would be great! -Rusty ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
