Re: [osg-users] How to detect rotating image
Hi Clement, On 27 February 2012 06:26, clement@csiro.au wrote: I would like to know how to detect the image is rotating. For example, we can use the mouse to rotate the image on viewer. If we drag on the viewer, the image will automatically rotate. Any event I can get the image is rotating by itself? Thanks. It's not possible to know precisely what you mean given the above. What exactly do you mean by image? A texture on a quad? The whole framebuffer? Are we talking about an object in the scene graph being rotated by a transform, or simply an object moving because the camera is moving. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to detect rotating image
Hi Clement, The osgViewer::ViewerBase (base class for Viewer) has a FrameScheme hint for the run() method which enables ON_DEMAND or CONTINUOUS, ON_DEMAND is the approach you'd want. You'll be calling frame() yourself rather than run() so won't be able to utilize this feature, but you should be able to learn from it. Have a look at the ViewerBase::run() method in OpenSceneGraph/src/osgViewer/ViewerBase.cpp, in particular the use of checkNeedToDoFrame() which is used to decide whether a frame is needed or not. Robert. On 27 February 2012 09:57, clement@csiro.au wrote: Hi Robert, I mentioned before I got much cpu usage on MFC window. In osgMFC example, it uses a thread and for loop to keep calling _osgViewer-frame(). It is a reason why the cpu keeps loading and it also depended on how large of volume data loaded. Now I have changed to call frame() on MFC OnPaint event. It can decrease much cpu usage. I also added to call frame() on mouse move, mouse wheel and size events for zooming and rotating the image. But all MFC events cannot be fired if the image is rotating by itself. Thus, I am thinking whether osg has an event to detect the image is rotating. I just found a solution to add MFC mouse button up and down to detect whether the user wants to rotate the image. Then I can do it all on MFC event. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Monday, 27 February 2012 8:17 PM To: OpenSceneGraph Users Subject: Re: [osg-users] How to detect rotating image Hi Clement, On 27 February 2012 06:26, clement@csiro.au wrote: I would like to know how to detect the image is rotating. For example, we can use the mouse to rotate the image on viewer. If we drag on the viewer, the image will automatically rotate. Any event I can get the image is rotating by itself? Thanks. It's not possible to know precisely what you mean given the above. What exactly do you mean by image? A texture on a quad? The whole framebuffer? Are we talking about an object in the scene graph being rotated by a transform, or simply an object moving because the camera is moving. Robert. ___ 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] How to detect rotating image
Hi Robert, Thanks for your suggestion. I checked the source code viewerbase.cpp. There is attribute called _runFrameScheme, but the value is assigned by getenv(OSG_RUN_FRAME_SCHEME). Except to set the environment variable, any method I can assign the value to _runFrameScheme? Thanks. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Monday, 27 February 2012 9:55 PM To: OpenSceneGraph Users Subject: Re: [osg-users] How to detect rotating image Hi Clement, The osgViewer::ViewerBase (base class for Viewer) has a FrameScheme hint for the run() method which enables ON_DEMAND or CONTINUOUS, ON_DEMAND is the approach you'd want. You'll be calling frame() yourself rather than run() so won't be able to utilize this feature, but you should be able to learn from it. Have a look at the ViewerBase::run() method in OpenSceneGraph/src/osgViewer/ViewerBase.cpp, in particular the use of checkNeedToDoFrame() which is used to decide whether a frame is needed or not. Robert. On 27 February 2012 09:57, clement@csiro.au wrote: Hi Robert, I mentioned before I got much cpu usage on MFC window. In osgMFC example, it uses a thread and for loop to keep calling _osgViewer-frame(). It is a reason why the cpu keeps loading and it also depended on how large of volume data loaded. Now I have changed to call frame() on MFC OnPaint event. It can decrease much cpu usage. I also added to call frame() on mouse move, mouse wheel and size events for zooming and rotating the image. But all MFC events cannot be fired if the image is rotating by itself. Thus, I am thinking whether osg has an event to detect the image is rotating. I just found a solution to add MFC mouse button up and down to detect whether the user wants to rotate the image. Then I can do it all on MFC event. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Monday, 27 February 2012 8:17 PM To: OpenSceneGraph Users Subject: Re: [osg-users] How to detect rotating image Hi Clement, On 27 February 2012 06:26, clement@csiro.au wrote: I would like to know how to detect the image is rotating. For example, we can use the mouse to rotate the image on viewer. If we drag on the viewer, the image will automatically rotate. Any event I can get the image is rotating by itself? Thanks. It's not possible to know precisely what you mean given the above. What exactly do you mean by image? A texture on a quad? The whole framebuffer? Are we talking about an object in the scene graph being rotated by a transform, or simply an object moving because the camera is moving. Robert. ___ 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] How to detect rotating image
On 27 February 2012 11:26, clement@csiro.au wrote: Hi Robert, Thanks for your suggestion. I checked the source code viewerbase.cpp. There is attribute called _runFrameScheme, but the value is assigned by getenv(OSG_RUN_FRAME_SCHEME). Except to set the environment variable, any method I can assign the value to _runFrameScheme? Thanks. You have the source code, your hopefully are a programmer so should be capable of looking at the API and reading what the methods are. Please try it before asking lots of low level questions that could be answered with a quick look with an editor. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to detect rotating image
Hi Clement,
If you want to find out what is going on use a debugger. A modicum of
self reliance is key element of being a successful programmer. You
can't expect others to keep hand walking your through every little
feature one by one.
Robert.
On 27 February 2012 13:11, clement@csiro.au wrote:
Hi Robert,
Do you know how to test the osgViewer is using ON_DEMAND flag? Here is my
code:
void cOSG::Render(void* ptr)
{
cOSG* osg = (cOSG*)ptr;
osgViewer::Viewer* viewer = osg-getViewer();
viewer-run();
}
void cOSG::initOSGViewer()
{
putenv(OSG_RUN_FRAME_SCHEME=ON_DEMAND);
osgViewer::Viewer* osgViewer = new osgViewer::Viewer();
...
...
}
Before I create osgViewer, I added environment variable. But I can't see
any different compare without environment variable setting. I am not sure
whether osg viewer is using ON_DEMAND.
Regards,
Clement
From: osg-users-boun...@lists.openscenegraph.org
[osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield
[robert.osfi...@gmail.com]
Sent: Monday, 27 February 2012 10:35 PM
To: OpenSceneGraph Users
Subject: Re: [osg-users] How to detect rotating image
On 27 February 2012 11:26, clement@csiro.au wrote:
Hi Robert,
Thanks for your suggestion. I checked the source code viewerbase.cpp.
There is attribute called _runFrameScheme, but the value is assigned by
getenv(OSG_RUN_FRAME_SCHEME). Except to set the environment variable, any
method I can assign the value to _runFrameScheme? Thanks.
You have the source code, your hopefully are a programmer so should be
capable of looking at the API and reading what the methods are.
Please try it before asking lots of low level questions that could be
answered with a quick look with an editor.
Robert.
___
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http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
___
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Re: [osg-users] How to detect rotating image
You could do a setenv(..), in you code on startup Gordon Tomlinson Chief Engineer(Remoteview) Overwatch An Operating Unit of Textron Systems __ -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of clement@csiro.au Sent: Monday, February 27, 2012 6:27 AM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] How to detect rotating image Hi Robert, Thanks for your suggestion. I checked the source code viewerbase.cpp. There is attribute called _runFrameScheme, but the value is assigned by getenv(OSG_RUN_FRAME_SCHEME). Except to set the environment variable, any method I can assign the value to _runFrameScheme? Thanks. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Monday, 27 February 2012 9:55 PM To: OpenSceneGraph Users Subject: Re: [osg-users] How to detect rotating image Hi Clement, The osgViewer::ViewerBase (base class for Viewer) has a FrameScheme hint for the run() method which enables ON_DEMAND or CONTINUOUS, ON_DEMAND is the approach you'd want. You'll be calling frame() yourself rather than run() so won't be able to utilize this feature, but you should be able to learn from it. Have a look at the ViewerBase::run() method in OpenSceneGraph/src/osgViewer/ViewerBase.cpp, in particular the use of checkNeedToDoFrame() which is used to decide whether a frame is needed or not. Robert. On 27 February 2012 09:57, clement@csiro.au wrote: Hi Robert, I mentioned before I got much cpu usage on MFC window. In osgMFC example, it uses a thread and for loop to keep calling _osgViewer-frame(). It is a reason why the cpu keeps loading and it also depended on how large of volume data loaded. Now I have changed to call frame() on MFC OnPaint event. It can decrease much cpu usage. I also added to call frame() on mouse move, mouse wheel and size events for zooming and rotating the image. But all MFC events cannot be fired if the image is rotating by itself. Thus, I am thinking whether osg has an event to detect the image is rotating. I just found a solution to add MFC mouse button up and down to detect whether the user wants to rotate the image. Then I can do it all on MFC event. Regards, Clement From: osg-users-boun...@lists.openscenegraph.org [osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield [robert.osfi...@gmail.com] Sent: Monday, 27 February 2012 8:17 PM To: OpenSceneGraph Users Subject: Re: [osg-users] How to detect rotating image Hi Clement, On 27 February 2012 06:26, clement@csiro.au wrote: I would like to know how to detect the image is rotating. For example, we can use the mouse to rotate the image on viewer. If we drag on the viewer, the image will automatically rotate. Any event I can get the image is rotating by itself? Thanks. It's not possible to know precisely what you mean given the above. What exactly do you mean by image? A texture on a quad? The whole framebuffer? Are we talking about an object in the scene graph being rotated by a transform, or simply an object moving because the camera is moving. Robert. ___ 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] How to detect rotating image
Hi Robert,
Sorry for the mass email. I have debugged the program and I am sure
ON_DEMAND is set to OSG_RUN_FRAME_SCHEME, but I can't see any different. The
cpu usage is still used 25% on idle.
Regards,
Clement
From: osg-users-boun...@lists.openscenegraph.org
[osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield
[robert.osfi...@gmail.com]
Sent: Tuesday, 28 February 2012 12:41 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] How to detect rotating image
Hi Clement,
If you want to find out what is going on use a debugger. A modicum of
self reliance is key element of being a successful programmer. You
can't expect others to keep hand walking your through every little
feature one by one.
Robert.
On 27 February 2012 13:11, clement@csiro.au wrote:
Hi Robert,
Do you know how to test the osgViewer is using ON_DEMAND flag? Here is my
code:
void cOSG::Render(void* ptr)
{
cOSG* osg = (cOSG*)ptr;
osgViewer::Viewer* viewer = osg-getViewer();
viewer-run();
}
void cOSG::initOSGViewer()
{
putenv(OSG_RUN_FRAME_SCHEME=ON_DEMAND);
osgViewer::Viewer* osgViewer = new osgViewer::Viewer();
...
...
}
Before I create osgViewer, I added environment variable. But I can't see
any different compare without environment variable setting. I am not sure
whether osg viewer is using ON_DEMAND.
Regards,
Clement
From: osg-users-boun...@lists.openscenegraph.org
[osg-users-boun...@lists.openscenegraph.org] On Behalf Of Robert Osfield
[robert.osfi...@gmail.com]
Sent: Monday, 27 February 2012 10:35 PM
To: OpenSceneGraph Users
Subject: Re: [osg-users] How to detect rotating image
On 27 February 2012 11:26, clement@csiro.au wrote:
Hi Robert,
Thanks for your suggestion. I checked the source code viewerbase.cpp.
There is attribute called _runFrameScheme, but the value is assigned by
getenv(OSG_RUN_FRAME_SCHEME). Except to set the environment variable, any
method I can assign the value to _runFrameScheme? Thanks.
You have the source code, your hopefully are a programmer so should be
capable of looking at the API and reading what the methods are.
Please try it before asking lots of low level questions that could be
answered with a quick look with an editor.
Robert.
___
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osg-users@lists.openscenegraph.org
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