Re: [osg-users] why dynamic modification are so difficult?
Hi All, I've tried several things, without achieving any improvement. The modified geode always disappear from the rendered scene, but if I load it with osgViewer.exe, it's properly rendered. I'm sure I miss something related to the viewer frame loop and I have 2 questions: 1. Do we always need to call the update/rendering traversals in a scene when we remove drawables from a geode and add new ones? Shouldn't this be automatically taken in the scene rendering thread (if any)? 2. If the above answer is yes (i.e. we always need to create and manage a viewer frame loop), how could I have the frame loop updating the scene if my geodes are modified before the scene update can be called, i.e. how can I first modify the geode and afterword update the scene by calling the viewer update/rendering traversals. This is because I'm implementing a node/link editor that allows to create, link and modify nodes and at any time I shall be able to update/refresh the resulting scene viewer. Thanks. Fausto On Fri, Jan 22, 2010 at 10:44 AM, fausto f4us...@gmail.com wrote: No, may be the problem is not there yet, unless I miss something. Never mind the following, I've been able to make it appear. I've tried to call viewer-frame() when I know that the scene has been modified, but nothing appears now in the viewer. However the problem is still the same, even when I call viewer-frame() after having removed/added drawables from the geode. The new drawables don't appear in the viewer, while the old ones have properly disappeared. Fausto On Fri, Jan 22, 2010 at 10:25 AM, fausto f4us...@gmail.com wrote: Hi JP, Does createGeom reuse any old osg data (arrays)? No. where in your frame loop do you do this? Well, now that you tell me, I think the problem is here. I have no loop. I thought that the rendering refresh was done automatically when a node in the scene was modified. Sorry for my ignorance, this might seem stupid, but since I have very few dynamic modifications in my scene, how can I simply refresh the viewer frame without being obliged to have a loop. I've tried to call viewer-frame() when I know that the scene has been modified, but nothing appears now in the viewer. Cheers. Fausto On Fri, Jan 22, 2010 at 9:44 AM, J.P. Delport jpdelp...@csir.co.zawrote: Hi, fausto wrote: Hi JP, it's impossible to show exactly my code, but what I basically do with the geode is: 1. Remove all drawables: geode-removeDrawables((unsigned int)0, geode-getNumDrawables()); 2. Create new ones: osg::ref_ptr osg::Geometry geom; geom = createGeom(parameters); .. 3. Add them to the geode: if( geom.valid() ) geode-addDrawable( geom.get() ); I don't see anything strange. Does createGeom reuse any old osg data (arrays)? where in your frame loop do you do this? In between rendering calls (frame)? What happens if you just delete the geode and add a new one? jp I'm not sure the problem is there, because as I mentioned the new scene is properly shown if I load it with osgViewer.exe. I think the problem is more with some missing settings, either to the drawables/nodes, or to the viewer (the original one, which doesn't get updated). I tried to set the drawables data variance to DYNAMIC, and other things but nothing worked. However, as Robert said, it seems this should work without any additional action. The strange thing is, why the old drawables are properly deleted from the original viewer, but the new ones are not added? I would have preferred that the viewer didn't do anything, than just 1 part of the job. Thank you all for your prompt replies, I really appreciate it. Fausto On Fri, Jan 22, 2010 at 7:55 AM, J.P. Delport jpdelp...@csir.co.zamailto: jpdelp...@csir.co.za wrote: Hi, can you give more detail on what you are adding/removing? Do you use the same vertex lists, but with new drawables. Do you change vertices, but keep the drawables? To get more help you'd probably need to make a very small example that shows the problem... jp fausto wrote: Thank you both for your inputs. To Robert: Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. Yes, as I mentioned the new scene data is OK, I can see it while debugging and after saving-loading it with osgViewer.exe all new drawables appear in the scene, and previous ones are removed. So, the scene is OK, the problem is really with the original viewer. It renders OK, but doesn't update properly when drawables are added. I'm rendering in Qt widgets, could that be the problem? To D.J. I might recommend refactoring the code to add/remove nodes instead of drawables. Unfortunately, I need nodes to be the same. I keep searching and testing. Thanks again for your help.
Re: [osg-users] why dynamic modification are so difficult?
Hi JP, it's impossible to show exactly my code, but what I basically do with the geode is: 1. Remove all drawables: geode-removeDrawables((unsigned int)0, geode-getNumDrawables()); 2. Create new ones: osg::ref_ptr osg::Geometry geom; geom = createGeom(parameters); .. 3. Add them to the geode: if( geom.valid() ) geode-addDrawable( geom.get() ); I'm not sure the problem is there, because as I mentioned the new scene is properly shown if I load it with osgViewer.exe. I think the problem is more with some missing settings, either to the drawables/nodes, or to the viewer (the original one, which doesn't get updated). I tried to set the drawables data variance to DYNAMIC, and other things but nothing worked. However, as Robert said, it seems this should work without any additional action. The strange thing is, why the old drawables are properly deleted from the original viewer, but the new ones are not added? I would have preferred that the viewer didn't do anything, than just 1 part of the job. Thank you all for your prompt replies, I really appreciate it. Fausto On Fri, Jan 22, 2010 at 7:55 AM, J.P. Delport jpdelp...@csir.co.za wrote: Hi, can you give more detail on what you are adding/removing? Do you use the same vertex lists, but with new drawables. Do you change vertices, but keep the drawables? To get more help you'd probably need to make a very small example that shows the problem... jp fausto wrote: Thank you both for your inputs. To Robert: Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. Yes, as I mentioned the new scene data is OK, I can see it while debugging and after saving-loading it with osgViewer.exe all new drawables appear in the scene, and previous ones are removed. So, the scene is OK, the problem is really with the original viewer. It renders OK, but doesn't update properly when drawables are added. I'm rendering in Qt widgets, could that be the problem? To D.J. I might recommend refactoring the code to add/remove nodes instead of drawables. Unfortunately, I need nodes to be the same. I keep searching and testing. Thanks again for your help. Cheers. Fausto On Thu, Jan 21, 2010 at 6:42 PM, D.J. Caldwell dlcaldwel...@gmail.commailto: dlcaldwel...@gmail.com wrote: Hi Fausto and Robert, If the simple modification is due to some specific user event (button press, file dialog, etc.), I might recommend refactoring the code to add/remove nodes instead of drawables. It sounds like you have no trouble initially getting the geometry into the scene; it is the simple modification that is the problem. What I am suggesting here is a work-around, and not a fix (on my system, it appears that there is no bug to fix). Other than this, I believe the issue may be familiarity with the available patterns; that is, using the right tool for the right job. No insult intended, but the only fix for that is research, time, and patience. The project I am part of uses visitors and/or swapping out vertices for time based changes, and adding/removing nodes for user based inputs. Fausto, as Robert said, you are the only one who can know what is appropriate for your project. Just some things to consider; I hope this helps... D.J. On Thu, Jan 21, 2010 at 12:12 PM, Robert Osfield robert.osfi...@gmail.com mailto:robert.osfi...@gmail.com wrote: Hi Fausto, Dynamically modifying the scene graph shouldn't be that hard. Removing drawables and adding news ones should perfect safe and shouldn't require and extra steps from you, no need to dirty bounding volumes or display lists, it should all just work. As to why your new drawables aren't appearing I can't say. Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. It could be simply that there is something wrong with the geometry data you've set up. Only you has your app and your data so you're the only one that can investigate. Robert. On Thu, Jan 21, 2010 at 4:41 PM, fausto f4us...@gmail.com mailto:f4us...@gmail.com wrote: Hi All, I'm struggling to have a simple modification of an osg scene working. I simply need to remove all drawables from a geode and add new drawables to the same geode. In the viewer, the geode just disappears after removing the drawables, but I can see that the scene contains the geode with the new drawables. So, it seems a rendering problem. I see that many people have similar problems with dynamic modifications. I've read plenty of posts about setting display list to false, using callbacks, dirtyBound(), etc But I hope there is a clearer and easier way to achieve this.
Re: [osg-users] why dynamic modification are so difficult?
Hi, fausto wrote: Hi JP, it's impossible to show exactly my code, but what I basically do with the geode is: 1. Remove all drawables: geode-removeDrawables((unsigned int)0, geode-getNumDrawables()); 2. Create new ones: osg::ref_ptr osg::Geometry geom; geom = createGeom(parameters); .. 3. Add them to the geode: if( geom.valid() ) geode-addDrawable( geom.get() ); I don't see anything strange. Does createGeom reuse any old osg data (arrays)? where in your frame loop do you do this? In between rendering calls (frame)? What happens if you just delete the geode and add a new one? jp I'm not sure the problem is there, because as I mentioned the new scene is properly shown if I load it with osgViewer.exe. I think the problem is more with some missing settings, either to the drawables/nodes, or to the viewer (the original one, which doesn't get updated). I tried to set the drawables data variance to DYNAMIC, and other things but nothing worked. However, as Robert said, it seems this should work without any additional action. The strange thing is, why the old drawables are properly deleted from the original viewer, but the new ones are not added? I would have preferred that the viewer didn't do anything, than just 1 part of the job. Thank you all for your prompt replies, I really appreciate it. Fausto On Fri, Jan 22, 2010 at 7:55 AM, J.P. Delport jpdelp...@csir.co.za mailto:jpdelp...@csir.co.za wrote: Hi, can you give more detail on what you are adding/removing? Do you use the same vertex lists, but with new drawables. Do you change vertices, but keep the drawables? To get more help you'd probably need to make a very small example that shows the problem... jp fausto wrote: Thank you both for your inputs. To Robert: Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. Yes, as I mentioned the new scene data is OK, I can see it while debugging and after saving-loading it with osgViewer.exe all new drawables appear in the scene, and previous ones are removed. So, the scene is OK, the problem is really with the original viewer. It renders OK, but doesn't update properly when drawables are added. I'm rendering in Qt widgets, could that be the problem? To D.J. I might recommend refactoring the code to add/remove nodes instead of drawables. Unfortunately, I need nodes to be the same. I keep searching and testing. Thanks again for your help. Cheers. Fausto On Thu, Jan 21, 2010 at 6:42 PM, D.J. Caldwell dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com wrote: Hi Fausto and Robert, If the simple modification is due to some specific user event (button press, file dialog, etc.), I might recommend refactoring the code to add/remove nodes instead of drawables. It sounds like you have no trouble initially getting the geometry into the scene; it is the simple modification that is the problem. What I am suggesting here is a work-around, and not a fix (on my system, it appears that there is no bug to fix). Other than this, I believe the issue may be familiarity with the available patterns; that is, using the right tool for the right job. No insult intended, but the only fix for that is research, time, and patience. The project I am part of uses visitors and/or swapping out vertices for time based changes, and adding/removing nodes for user based inputs. Fausto, as Robert said, you are the only one who can know what is appropriate for your project. Just some things to consider; I hope this helps... D.J. On Thu, Jan 21, 2010 at 12:12 PM, Robert Osfield robert.osfi...@gmail.com mailto:robert.osfi...@gmail.com mailto:robert.osfi...@gmail.com mailto:robert.osfi...@gmail.com wrote: Hi Fausto, Dynamically modifying the scene graph shouldn't be that hard. Removing drawables and adding news ones should perfect safe and shouldn't require and extra steps from you, no need to dirty bounding volumes or display lists, it should all just work. As to why your new drawables aren't appearing I can't say. Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. It could be simply that there
Re: [osg-users] why dynamic modification are so difficult?
Hi JP, Does createGeom reuse any old osg data (arrays)? No. where in your frame loop do you do this? Well, now that you tell me, I think the problem is here. I have no loop. I thought that the rendering refresh was done automatically when a node in the scene was modified. Sorry for my ignorance, this might seem stupid, but since I have very few dynamic modifications in my scene, how can I simply refresh the viewer frame without being obliged to have a loop. I've tried to call viewer-frame() when I know that the scene has been modified, but nothing appears now in the viewer. Cheers. Fausto On Fri, Jan 22, 2010 at 9:44 AM, J.P. Delport jpdelp...@csir.co.za wrote: Hi, fausto wrote: Hi JP, it's impossible to show exactly my code, but what I basically do with the geode is: 1. Remove all drawables: geode-removeDrawables((unsigned int)0, geode-getNumDrawables()); 2. Create new ones: osg::ref_ptr osg::Geometry geom; geom = createGeom(parameters); .. 3. Add them to the geode: if( geom.valid() ) geode-addDrawable( geom.get() ); I don't see anything strange. Does createGeom reuse any old osg data (arrays)? where in your frame loop do you do this? In between rendering calls (frame)? What happens if you just delete the geode and add a new one? jp I'm not sure the problem is there, because as I mentioned the new scene is properly shown if I load it with osgViewer.exe. I think the problem is more with some missing settings, either to the drawables/nodes, or to the viewer (the original one, which doesn't get updated). I tried to set the drawables data variance to DYNAMIC, and other things but nothing worked. However, as Robert said, it seems this should work without any additional action. The strange thing is, why the old drawables are properly deleted from the original viewer, but the new ones are not added? I would have preferred that the viewer didn't do anything, than just 1 part of the job. Thank you all for your prompt replies, I really appreciate it. Fausto On Fri, Jan 22, 2010 at 7:55 AM, J.P. Delport jpdelp...@csir.co.zamailto: jpdelp...@csir.co.za wrote: Hi, can you give more detail on what you are adding/removing? Do you use the same vertex lists, but with new drawables. Do you change vertices, but keep the drawables? To get more help you'd probably need to make a very small example that shows the problem... jp fausto wrote: Thank you both for your inputs. To Robert: Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. Yes, as I mentioned the new scene data is OK, I can see it while debugging and after saving-loading it with osgViewer.exe all new drawables appear in the scene, and previous ones are removed. So, the scene is OK, the problem is really with the original viewer. It renders OK, but doesn't update properly when drawables are added. I'm rendering in Qt widgets, could that be the problem? To D.J. I might recommend refactoring the code to add/remove nodes instead of drawables. Unfortunately, I need nodes to be the same. I keep searching and testing. Thanks again for your help. Cheers. Fausto On Thu, Jan 21, 2010 at 6:42 PM, D.J. Caldwell dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com wrote: Hi Fausto and Robert, If the simple modification is due to some specific user event (button press, file dialog, etc.), I might recommend refactoring the code to add/remove nodes instead of drawables. It sounds like you have no trouble initially getting the geometry into the scene; it is the simple modification that is the problem. What I am suggesting here is a work-around, and not a fix (on my system, it appears that there is no bug to fix). Other than this, I believe the issue may be familiarity with the available patterns; that is, using the right tool for the right job. No insult intended, but the only fix for that is research, time, and patience. The project I am part of uses visitors and/or swapping out vertices for time based changes, and adding/removing nodes for user based inputs. Fausto, as Robert said, you are the only one who can know what is appropriate for your project. Just some things to consider; I hope this helps... D.J. On Thu, Jan 21, 2010 at 12:12 PM, Robert Osfield robert.osfi...@gmail.com mailto:robert.osfi...@gmail.com mailto:robert.osfi...@gmail.com
Re: [osg-users] why dynamic modification are so difficult?
No, may be the problem is not there yet, unless I miss something. Never mind the following, I've been able to make it appear. I've tried to call viewer-frame() when I know that the scene has been modified, but nothing appears now in the viewer. However the problem is still the same, even when I call viewer-frame() after having removed/added drawables from the geode. The new drawables don't appear in the viewer, while the old ones have properly disappeared. Fausto On Fri, Jan 22, 2010 at 10:25 AM, fausto f4us...@gmail.com wrote: Hi JP, Does createGeom reuse any old osg data (arrays)? No. where in your frame loop do you do this? Well, now that you tell me, I think the problem is here. I have no loop. I thought that the rendering refresh was done automatically when a node in the scene was modified. Sorry for my ignorance, this might seem stupid, but since I have very few dynamic modifications in my scene, how can I simply refresh the viewer frame without being obliged to have a loop. I've tried to call viewer-frame() when I know that the scene has been modified, but nothing appears now in the viewer. Cheers. Fausto On Fri, Jan 22, 2010 at 9:44 AM, J.P. Delport jpdelp...@csir.co.zawrote: Hi, fausto wrote: Hi JP, it's impossible to show exactly my code, but what I basically do with the geode is: 1. Remove all drawables: geode-removeDrawables((unsigned int)0, geode-getNumDrawables()); 2. Create new ones: osg::ref_ptr osg::Geometry geom; geom = createGeom(parameters); .. 3. Add them to the geode: if( geom.valid() ) geode-addDrawable( geom.get() ); I don't see anything strange. Does createGeom reuse any old osg data (arrays)? where in your frame loop do you do this? In between rendering calls (frame)? What happens if you just delete the geode and add a new one? jp I'm not sure the problem is there, because as I mentioned the new scene is properly shown if I load it with osgViewer.exe. I think the problem is more with some missing settings, either to the drawables/nodes, or to the viewer (the original one, which doesn't get updated). I tried to set the drawables data variance to DYNAMIC, and other things but nothing worked. However, as Robert said, it seems this should work without any additional action. The strange thing is, why the old drawables are properly deleted from the original viewer, but the new ones are not added? I would have preferred that the viewer didn't do anything, than just 1 part of the job. Thank you all for your prompt replies, I really appreciate it. Fausto On Fri, Jan 22, 2010 at 7:55 AM, J.P. Delport jpdelp...@csir.co.zamailto: jpdelp...@csir.co.za wrote: Hi, can you give more detail on what you are adding/removing? Do you use the same vertex lists, but with new drawables. Do you change vertices, but keep the drawables? To get more help you'd probably need to make a very small example that shows the problem... jp fausto wrote: Thank you both for your inputs. To Robert: Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. Yes, as I mentioned the new scene data is OK, I can see it while debugging and after saving-loading it with osgViewer.exe all new drawables appear in the scene, and previous ones are removed. So, the scene is OK, the problem is really with the original viewer. It renders OK, but doesn't update properly when drawables are added. I'm rendering in Qt widgets, could that be the problem? To D.J. I might recommend refactoring the code to add/remove nodes instead of drawables. Unfortunately, I need nodes to be the same. I keep searching and testing. Thanks again for your help. Cheers. Fausto On Thu, Jan 21, 2010 at 6:42 PM, D.J. Caldwell dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com wrote: Hi Fausto and Robert, If the simple modification is due to some specific user event (button press, file dialog, etc.), I might recommend refactoring the code to add/remove nodes instead of drawables. It sounds like you have no trouble initially getting the geometry into the scene; it is the simple modification that is the problem. What I am suggesting here is a work-around, and not a fix (on my system, it appears that there is no bug to fix). Other than this, I believe the issue may be familiarity with the available patterns; that is, using the right tool for the right job. No insult intended, but the only fix for that is research, time, and patience. The
[osg-users] why dynamic modification are so difficult?
Hi All, I'm struggling to have a simple modification of an osg scene working. I simply need to remove all drawables from a geode and add new drawables to the same geode. In the viewer, the geode just disappears after removing the drawables, but I can see that the scene contains the geode with the new drawables. So, it seems a rendering problem. I see that many people have similar problems with dynamic modifications. I've read plenty of posts about setting display list to false, using callbacks, dirtyBound(), etc But I hope there is a clearer and easier way to achieve this. Please let me know. Thanks for any help. Fausto ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] why dynamic modification are so difficult?
Hi Fausto, Dynamically modifying the scene graph shouldn't be that hard. Removing drawables and adding news ones should perfect safe and shouldn't require and extra steps from you, no need to dirty bounding volumes or display lists, it should all just work. As to why your new drawables aren't appearing I can't say. Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. It could be simply that there is something wrong with the geometry data you've set up. Only you has your app and your data so you're the only one that can investigate. Robert. On Thu, Jan 21, 2010 at 4:41 PM, fausto f4us...@gmail.com wrote: Hi All, I'm struggling to have a simple modification of an osg scene working. I simply need to remove all drawables from a geode and add new drawables to the same geode. In the viewer, the geode just disappears after removing the drawables, but I can see that the scene contains the geode with the new drawables. So, it seems a rendering problem. I see that many people have similar problems with dynamic modifications. I've read plenty of posts about setting display list to false, using callbacks, dirtyBound(), etc But I hope there is a clearer and easier way to achieve this. Please let me know. Thanks for any help. Fausto ___ 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] why dynamic modification are so difficult?
Hi Fausto and Robert, If the simple modification is due to some specific user event (button press, file dialog, etc.), I might recommend refactoring the code to add/remove nodes instead of drawables. It sounds like you have no trouble initially getting the geometry into the scene; it is the simple modification that is the problem. What I am suggesting here is a work-around, and not a fix (on my system, it appears that there is no bug to fix). Other than this, I believe the issue may be familiarity with the available patterns; that is, using the right tool for the right job. No insult intended, but the only fix for that is research, time, and patience. The project I am part of uses visitors and/or swapping out vertices for time based changes, and adding/removing nodes for user based inputs. Fausto, as Robert said, you are the only one who can know what is appropriate for your project. Just some things to consider; I hope this helps... D.J. On Thu, Jan 21, 2010 at 12:12 PM, Robert Osfield robert.osfi...@gmail.com wrote: Hi Fausto, Dynamically modifying the scene graph shouldn't be that hard. Removing drawables and adding news ones should perfect safe and shouldn't require and extra steps from you, no need to dirty bounding volumes or display lists, it should all just work. As to why your new drawables aren't appearing I can't say. Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. It could be simply that there is something wrong with the geometry data you've set up. Only you has your app and your data so you're the only one that can investigate. Robert. On Thu, Jan 21, 2010 at 4:41 PM, fausto f4us...@gmail.com wrote: Hi All, I'm struggling to have a simple modification of an osg scene working. I simply need to remove all drawables from a geode and add new drawables to the same geode. In the viewer, the geode just disappears after removing the drawables, but I can see that the scene contains the geode with the new drawables. So, it seems a rendering problem. I see that many people have similar problems with dynamic modifications. I've read plenty of posts about setting display list to false, using callbacks, dirtyBound(), etc But I hope there is a clearer and easier way to achieve this. Please let me know. Thanks for any help. Fausto ___ 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 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] why dynamic modification are so difficult?
Thank you both for your inputs. To Robert: Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. Yes, as I mentioned the new scene data is OK, I can see it while debugging and after saving-loading it with osgViewer.exe all new drawables appear in the scene, and previous ones are removed. So, the scene is OK, the problem is really with the original viewer. It renders OK, but doesn't update properly when drawables are added. I'm rendering in Qt widgets, could that be the problem? To D.J. I might recommend refactoring the code to add/remove nodes instead of drawables. Unfortunately, I need nodes to be the same. I keep searching and testing. Thanks again for your help. Cheers. Fausto On Thu, Jan 21, 2010 at 6:42 PM, D.J. Caldwell dlcaldwel...@gmail.comwrote: Hi Fausto and Robert, If the simple modification is due to some specific user event (button press, file dialog, etc.), I might recommend refactoring the code to add/remove nodes instead of drawables. It sounds like you have no trouble initially getting the geometry into the scene; it is the simple modification that is the problem. What I am suggesting here is a work-around, and not a fix (on my system, it appears that there is no bug to fix). Other than this, I believe the issue may be familiarity with the available patterns; that is, using the right tool for the right job. No insult intended, but the only fix for that is research, time, and patience. The project I am part of uses visitors and/or swapping out vertices for time based changes, and adding/removing nodes for user based inputs. Fausto, as Robert said, you are the only one who can know what is appropriate for your project. Just some things to consider; I hope this helps... D.J. On Thu, Jan 21, 2010 at 12:12 PM, Robert Osfield robert.osfi...@gmail.com wrote: Hi Fausto, Dynamically modifying the scene graph shouldn't be that hard. Removing drawables and adding news ones should perfect safe and shouldn't require and extra steps from you, no need to dirty bounding volumes or display lists, it should all just work. As to why your new drawables aren't appearing I can't say. Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. It could be simply that there is something wrong with the geometry data you've set up. Only you has your app and your data so you're the only one that can investigate. Robert. On Thu, Jan 21, 2010 at 4:41 PM, fausto f4us...@gmail.com wrote: Hi All, I'm struggling to have a simple modification of an osg scene working. I simply need to remove all drawables from a geode and add new drawables to the same geode. In the viewer, the geode just disappears after removing the drawables, but I can see that the scene contains the geode with the new drawables. So, it seems a rendering problem. I see that many people have similar problems with dynamic modifications. I've read plenty of posts about setting display list to false, using callbacks, dirtyBound(), etc But I hope there is a clearer and easier way to achieve this. Please let me know. Thanks for any help. Fausto ___ 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 ___ 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] why dynamic modification are so difficult?
Fausto, My project uses Qt widgets as well, so if this is the problem, I'd be interested in the solution so that I can proof read our code. Fortunately/unfortunately, it appears to work for me. As to the nodes and drawables, all I can say is that there are nodes, and then, there are nodes. In any event, happy hunting... D.J. On Thu, Jan 21, 2010 at 1:14 PM, fausto f4us...@gmail.com wrote: Thank you both for your inputs. To Robert: Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. Yes, as I mentioned the new scene data is OK, I can see it while debugging and after saving-loading it with osgViewer.exe all new drawables appear in the scene, and previous ones are removed. So, the scene is OK, the problem is really with the original viewer. It renders OK, but doesn't update properly when drawables are added. I'm rendering in Qt widgets, could that be the problem? To D.J. I might recommend refactoring the code to add/remove nodes instead of drawables. Unfortunately, I need nodes to be the same. I keep searching and testing. Thanks again for your help. Cheers. Fausto On Thu, Jan 21, 2010 at 6:42 PM, D.J. Caldwell dlcaldwel...@gmail.com wrote: Hi Fausto and Robert, If the simple modification is due to some specific user event (button press, file dialog, etc.), I might recommend refactoring the code to add/remove nodes instead of drawables. It sounds like you have no trouble initially getting the geometry into the scene; it is the simple modification that is the problem. What I am suggesting here is a work-around, and not a fix (on my system, it appears that there is no bug to fix). Other than this, I believe the issue may be familiarity with the available patterns; that is, using the right tool for the right job. No insult intended, but the only fix for that is research, time, and patience. The project I am part of uses visitors and/or swapping out vertices for time based changes, and adding/removing nodes for user based inputs. Fausto, as Robert said, you are the only one who can know what is appropriate for your project. Just some things to consider; I hope this helps... D.J. On Thu, Jan 21, 2010 at 12:12 PM, Robert Osfield robert.osfi...@gmail.com wrote: Hi Fausto, Dynamically modifying the scene graph shouldn't be that hard. Removing drawables and adding news ones should perfect safe and shouldn't require and extra steps from you, no need to dirty bounding volumes or display lists, it should all just work. As to why your new drawables aren't appearing I can't say. Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. It could be simply that there is something wrong with the geometry data you've set up. Only you has your app and your data so you're the only one that can investigate. Robert. On Thu, Jan 21, 2010 at 4:41 PM, fausto f4us...@gmail.com wrote: Hi All, I'm struggling to have a simple modification of an osg scene working. I simply need to remove all drawables from a geode and add new drawables to the same geode. In the viewer, the geode just disappears after removing the drawables, but I can see that the scene contains the geode with the new drawables. So, it seems a rendering problem. I see that many people have similar problems with dynamic modifications. I've read plenty of posts about setting display list to false, using callbacks, dirtyBound(), etc But I hope there is a clearer and easier way to achieve this. Please let me know. Thanks for any help. Fausto ___ 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 ___ 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 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] why dynamic modification are so difficult?
Hi, can you give more detail on what you are adding/removing? Do you use the same vertex lists, but with new drawables. Do you change vertices, but keep the drawables? To get more help you'd probably need to make a very small example that shows the problem... jp fausto wrote: Thank you both for your inputs. To Robert: Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. Yes, as I mentioned the new scene data is OK, I can see it while debugging and after saving-loading it with osgViewer.exe all new drawables appear in the scene, and previous ones are removed. So, the scene is OK, the problem is really with the original viewer. It renders OK, but doesn't update properly when drawables are added. I'm rendering in Qt widgets, could that be the problem? To D.J. I might recommend refactoring the code to add/remove nodes instead of drawables. Unfortunately, I need nodes to be the same. I keep searching and testing. Thanks again for your help. Cheers. Fausto On Thu, Jan 21, 2010 at 6:42 PM, D.J. Caldwell dlcaldwel...@gmail.com mailto:dlcaldwel...@gmail.com wrote: Hi Fausto and Robert, If the simple modification is due to some specific user event (button press, file dialog, etc.), I might recommend refactoring the code to add/remove nodes instead of drawables. It sounds like you have no trouble initially getting the geometry into the scene; it is the simple modification that is the problem. What I am suggesting here is a work-around, and not a fix (on my system, it appears that there is no bug to fix). Other than this, I believe the issue may be familiarity with the available patterns; that is, using the right tool for the right job. No insult intended, but the only fix for that is research, time, and patience. The project I am part of uses visitors and/or swapping out vertices for time based changes, and adding/removing nodes for user based inputs. Fausto, as Robert said, you are the only one who can know what is appropriate for your project. Just some things to consider; I hope this helps... D.J. On Thu, Jan 21, 2010 at 12:12 PM, Robert Osfield robert.osfi...@gmail.com mailto:robert.osfi...@gmail.com wrote: Hi Fausto, Dynamically modifying the scene graph shouldn't be that hard. Removing drawables and adding news ones should perfect safe and shouldn't require and extra steps from you, no need to dirty bounding volumes or display lists, it should all just work. As to why your new drawables aren't appearing I can't say. Try writing the subgraph they are in out to a file then load this file into osgviewer to see if can view them. It could be simply that there is something wrong with the geometry data you've set up. Only you has your app and your data so you're the only one that can investigate. Robert. On Thu, Jan 21, 2010 at 4:41 PM, fausto f4us...@gmail.com mailto:f4us...@gmail.com wrote: Hi All, I'm struggling to have a simple modification of an osg scene working. I simply need to remove all drawables from a geode and add new drawables to the same geode. In the viewer, the geode just disappears after removing the drawables, but I can see that the scene contains the geode with the new drawables. So, it seems a rendering problem. I see that many people have similar problems with dynamic modifications. I've read plenty of posts about setting display list to false, using callbacks, dirtyBound(), etc But I hope there is a clearer and easier way to achieve this. Please let me know. Thanks for any help. Fausto ___ osg-users mailing list osg-users@lists.openscenegraph.org mailto:osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org mailto:osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org mailto: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 -- This message is subject to the CSIR's copyright terms and
