Re: [osg-users] bounding box issue
http://www.vis-sim.com/osg/osg_faq_1.htm#f22 http://www.vis-sim.com/osg/osg_faq_1.htm#f17 __ Gordon Tomlinson [EMAIL PROTECTED] IM: [EMAIL PROTECTED] www.vis-sim.com www.gordontomlinson.com __ -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gianluca Natale Sent: Thursday, September 25, 2008 5:19 AM To: 'OpenSceneGraph Users' Subject: Re: [osg-users] bounding box issue Actually I'm using the old Producer::camera, and I cannot find such a way to disable the SMALL FEATURE CULLING. Is there a way to do that with Producer, or the default cannot be changed at all! Thanks, Gianluca -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gianluca Natale Sent: mercoledì 24 settembre 2008 16.28 To: 'OpenSceneGraph Users' Subject: Re: [osg-users] bounding box issue Thank you Robert, I will try. Gianluca. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: mercoledì 24 settembre 2008 16.02 To: OpenSceneGraph Users Subject: Re: [osg-users] bounding box issue Hi Gianluca, The OSG by defaults has small feature culling enabled, try disabling this: viewer.getCamera()-setCullingMode( viewer.getCamera()-getCullingMode() ~ osg::CullSettings::SMALL_FEATURE_CULLING); Robert. On Wed, Sep 24, 2008 at 2:52 PM, Gianluca Natale [EMAIL PROTECTED] wrote: Hi All. I have this very strange issue related to bounding boxes. I derived a class MyDrawable, from osg::Drawable. And I'm trying to make some experiments with it. I have a model containing two objects: - a cylinder, made by a bunch of points, defined as an instance of MyDrawable; - an object made by just one vertex, defined as an instance of MyDrawable. When I try to draw the model, just the cylinder is shown. I implemented the method GetBoundingBox()in MyDrawable. So, obviously, it returns a void BB for the second drawable. Does it depend on the void BB? I mean, does OSG check the dimension of the BB of an object before drawing it, and discard the object if its BB, in screen coords, becomes less than some threshold (expressed in pixels)? I suspect this behavior because, if I try to artificially enlarge the BB of the second drawable, once I zoom in I can see it on the screen. And disappear when I zoom out again. Thank you in advance. Regards, Gianluca Natale ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus Database: 270.7.1/1687 - Release Date: 9/23/2008 6:32 PM ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus Database: 270.7.1/1687 - Release Date: 9/23/2008 6:32 PM ___ 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] bounding box issue
Thank you Robert, it does work! Gianluca P.S.=I will pass to newer OSG version ASAP. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: giovedì 25 settembre 2008 13.11 To: OpenSceneGraph Users Subject: Re: [osg-users] bounding box issue Hi Gianluca, I don't recall the exact details, but you'll need to get the OsgSceneHandler form the Producer::Camera, then from this get it's osgUtil::SceneView and then CullingMode on this SceneView. It's a bit convoluted but it's possible. You other route would be to just port to osgViewer, there are other examples like this one that you'll find more straight forward when using osgViewer than Producer as osgViewer doesn't need an abstraction layer ontop the OSG to integrate it - it's all native OSG code. Robert. On Thu, Sep 25, 2008 at 10:18 AM, Gianluca Natale [EMAIL PROTECTED] wrote: Actually I'm using the old Producer::camera, and I cannot find such a way to disable the SMALL FEATURE CULLING. Is there a way to do that with Producer, or the default cannot be changed at all! Thanks, Gianluca -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gianluca Natale Sent: mercoledì 24 settembre 2008 16.28 To: 'OpenSceneGraph Users' Subject: Re: [osg-users] bounding box issue Thank you Robert, I will try. Gianluca. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: mercoledì 24 settembre 2008 16.02 To: OpenSceneGraph Users Subject: Re: [osg-users] bounding box issue Hi Gianluca, The OSG by defaults has small feature culling enabled, try disabling this: viewer.getCamera()-setCullingMode( viewer.getCamera()-getCullingMode() ~ osg::CullSettings::SMALL_FEATURE_CULLING); Robert. On Wed, Sep 24, 2008 at 2:52 PM, Gianluca Natale [EMAIL PROTECTED] wrote: Hi All. I have this very strange issue related to bounding boxes. I derived a class MyDrawable, from osg::Drawable. And I'm trying to make some experiments with it. I have a model containing two objects: - a cylinder, made by a bunch of points, defined as an instance of MyDrawable; - an object made by just one vertex, defined as an instance of MyDrawable. When I try to draw the model, just the cylinder is shown. I implemented the method GetBoundingBox()in MyDrawable. So, obviously, it returns a void BB for the second drawable. Does it depend on the void BB? I mean, does OSG check the dimension of the BB of an object before drawing it, and discard the object if its BB, in screen coords, becomes less than some threshold (expressed in pixels)? I suspect this behavior because, if I try to artificially enlarge the BB of the second drawable, once I zoom in I can see it on the screen. And disappear when I zoom out again. Thank you in advance. Regards, Gianluca Natale ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus Database: 270.7.1/1687 - Release Date: 9/23/2008 6:32 PM ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus Database: 270.7.1/1687 - Release Date: 9/23/2008 6:32 PM ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus Database: 270.7.2/1689 - Release Date: 9/24/2008 6:51 PM ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] bounding box issue
Hi All. I have this very strange issue related to bounding boxes. I derived a class MyDrawable, from osg::Drawable. And I'm trying to make some experiments with it. I have a model containing two objects: - a cylinder, made by a bunch of points, defined as an instance of MyDrawable; - an object made by just one vertex, defined as an instance of MyDrawable. When I try to draw the model, just the cylinder is shown. I implemented the method GetBoundingBox()in MyDrawable. So, obviously, it returns a void BB for the second drawable. Does it depend on the void BB? I mean, does OSG check the dimension of the BB of an object before drawing it, and discard the object if its BB, in screen coords, becomes less than some threshold (expressed in pixels)? I suspect this behavior because, if I try to artificially enlarge the BB of the second drawable, once I zoom in I can see it on the screen. And disappear when I zoom out again. Thank you in advance. Regards, Gianluca Natale ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] bounding box issue
Hi Gianluca, The OSG by defaults has small feature culling enabled, try disabling this: viewer.getCamera()-setCullingMode( viewer.getCamera()-getCullingMode() ~ osg::CullSettings::SMALL_FEATURE_CULLING); Robert. On Wed, Sep 24, 2008 at 2:52 PM, Gianluca Natale [EMAIL PROTECTED] wrote: Hi All. I have this very strange issue related to bounding boxes. I derived a class MyDrawable, from osg::Drawable. And I'm trying to make some experiments with it. I have a model containing two objects: - a cylinder, made by a bunch of points, defined as an instance of MyDrawable; - an object made by just one vertex, defined as an instance of MyDrawable. When I try to draw the model, just the cylinder is shown. I implemented the method GetBoundingBox()in MyDrawable. So, obviously, it returns a void BB for the second drawable. Does it depend on the void BB? I mean, does OSG check the dimension of the BB of an object before drawing it, and discard the object if its BB, in screen coords, becomes less than some threshold (expressed in pixels)? I suspect this behavior because, if I try to artificially enlarge the BB of the second drawable, once I zoom in I can see it on the screen. And disappear when I zoom out again. Thank you in advance. Regards, Gianluca Natale ___ 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] bounding box issue
Thank you Robert, I will try. Gianluca. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert Osfield Sent: mercoledì 24 settembre 2008 16.02 To: OpenSceneGraph Users Subject: Re: [osg-users] bounding box issue Hi Gianluca, The OSG by defaults has small feature culling enabled, try disabling this: viewer.getCamera()-setCullingMode( viewer.getCamera()-getCullingMode() ~ osg::CullSettings::SMALL_FEATURE_CULLING); Robert. On Wed, Sep 24, 2008 at 2:52 PM, Gianluca Natale [EMAIL PROTECTED] wrote: Hi All. I have this very strange issue related to bounding boxes. I derived a class MyDrawable, from osg::Drawable. And I'm trying to make some experiments with it. I have a model containing two objects: - a cylinder, made by a bunch of points, defined as an instance of MyDrawable; - an object made by just one vertex, defined as an instance of MyDrawable. When I try to draw the model, just the cylinder is shown. I implemented the method GetBoundingBox()in MyDrawable. So, obviously, it returns a void BB for the second drawable. Does it depend on the void BB? I mean, does OSG check the dimension of the BB of an object before drawing it, and discard the object if its BB, in screen coords, becomes less than some threshold (expressed in pixels)? I suspect this behavior because, if I try to artificially enlarge the BB of the second drawable, once I zoom in I can see it on the screen. And disappear when I zoom out again. Thank you in advance. Regards, Gianluca Natale ___ 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 No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus Database: 270.7.1/1687 - Release Date: 9/23/2008 6:32 PM ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
