Re: [osg-users] setViewMatrixAsLookAt not working to set the initial camera position
Hi Rodrigo,
are you sure about the values of your eye point. As you say your map is
georeferenced but it is certanly projected. So you should check the
projection system used by your map (maybe have a look at
https://epsg.io/?q=Brazil%20kind%3APROJCRS). I think the main problem
may be there. Have you tried maybe by opening your map with an modified
osgviewer and check what the eye position is by default ?
Cheers,
Christian
Le 2020-05-12 11:04, OpenSceneGraph Users a écrit :
Back at it again...
I'm using a Brazil georeferenced map, so I know what coordinates are good enough to be above the country, high enough to see it all, looking down:
(...)
osgViewer::Viewer viewer;
viewer.setSceneData( root.get() );
osg::ref_ptr controller = new OVNIController(); // my
own WASD flying controller
viewer.setCameraManipulator(controller);
viewer.getCamera()->setViewMatrixAsLookAt( osg::Vec3(-55.0f,-15.0f,50.0f),
osg::Vec3(), osg::Y_AXIS ); // eye (lon, lat, alt), center, up
viewer.getCameraManipulator()->home(1);
viewer.realize();
while ( !viewer.done() ) { viewer.frame(); }
return 0;
I don't know if setViewMatrixAsLookAt() and home() should go before or after realize(). Played with the axis as 3rd parameter for setViewMatrixAsLookAt, but the camera just won't move! Any help, please?
On Tuesday, January 8, 2019 at 1:39:53 AM UTC-2, sam wrote:
After you set the home position try: viewer.getCameraManipulator()->home(1);
Sorry I'm not right in front of my computer right now.
On Mon, Jan 7, 2019 at 7:26 PM Rodrigo Dias wrote: Hi
Sam,
By "home" I think you mean
Code:
viewer.getCameraManipulator()->setHomePosition( eye, center, up );
This really changed camera's position, though it's totally freaking out now
(I'm still fiddling with the values in eye, center and up).
But I have no idea what you meant by "delta time", something to go inside the
loop?
Thank you!
Cheers,
Rodrigo
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Re: [osg-users] setViewMatrixAsLookAt not working to set the initial camera position
Back at it again...
I'm using a Brazil georeferenced map, so I know what coordinates are good
enough to be above the country, high enough to see it all, looking down:
(...)
osgViewer::Viewer viewer;
viewer.setSceneData( root.get() );
osg::ref_ptr controller = new OVNIController();
// my own WASD flying controller
viewer.setCameraManipulator(controller);
viewer.getCamera()->setViewMatrixAsLookAt(
osg::Vec3(-55.0f,-15.0f,50.0f), osg::Vec3(), osg::Y_AXIS ); // eye (lon,
lat, alt), center, up
viewer.getCameraManipulator()->home(1);
viewer.realize();
while ( !viewer.done() ) { viewer.frame(); }
return 0;
I don't know if setViewMatrixAsLookAt() and home() should go before or
after realize(). Played with the axis as 3rd parameter for
setViewMatrixAsLookAt, but the camera just won't move! Any help, please?
On Tuesday, January 8, 2019 at 1:39:53 AM UTC-2, sam wrote:
>
> After you set the home position try:
> viewer.getCameraManipulator()->home(1);
>
> Sorry I'm not right in front of my computer right now.
>
> On Mon, Jan 7, 2019 at 7:26 PM Rodrigo Dias > wrote:
>
>> Hi Sam,
>>
>> By "home" I think you mean
>>
>>
>> Code:
>> viewer.getCameraManipulator()->setHomePosition( eye, center, up );
>>
>>
>>
>>
>> This really changed camera's position, though it's totally freaking out
>> now (I'm still fiddling with the values in eye, center and up).
>>
>> But I have no idea what you meant by "delta time", something to go inside
>> the loop?
>>
>> Thank you!
>>
>> Cheers,
>> Rodrigo
>>
>> --
>> Read this topic online here:
>> http://forum.openscenegraph.org/viewtopic.php?p=75413#75413
>>
>>
>>
>>
>>
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>> osg-users mailing list
>> osg-...@lists.openscenegraph.org
>> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>>
>
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Re: [osg-users] setViewMatrixAsLookAt not working to set the initial camera position
I just tried it, but still the camera is messed up. No matter which numbers I choose to eye, center and up, it never behaves as default. I have not even a clue about the difference between 10, 100 and 1000, which one should I use? (I'm using osgEarth's Map and MapNode, btw, which are displaying a whole flat white Earth, with only the desired country drawn with a texture) I tried using getViewMatrixAsLookAt with the default values, but it's still a mess. I've looked at many questions here, and in some of the source code, but nothing clears this up. Thank you! Cheers, Rodrigo -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75415#75415 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] setViewMatrixAsLookAt not working to set the initial camera position
After you set the home position try: viewer.getCameraManipulator()->home(1); Sorry I'm not right in front of my computer right now. On Mon, Jan 7, 2019 at 7:26 PM Rodrigo Dias wrote: > Hi Sam, > > By "home" I think you mean > > > Code: > viewer.getCameraManipulator()->setHomePosition( eye, center, up ); > > > > > This really changed camera's position, though it's totally freaking out > now (I'm still fiddling with the values in eye, center and up). > > But I have no idea what you meant by "delta time", something to go inside > the loop? > > Thank you! > > Cheers, > Rodrigo > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=75413#75413 > > > > > > ___ > 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] setViewMatrixAsLookAt not working to set the initial camera position
Hi Sam, By "home" I think you mean Code: viewer.getCameraManipulator()->setHomePosition( eye, center, up ); This really changed camera's position, though it's totally freaking out now (I'm still fiddling with the values in eye, center and up). But I have no idea what you meant by "delta time", something to go inside the loop? Thank you! Cheers, Rodrigo -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=75413#75413 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] setViewMatrixAsLookAt not working to set the initial camera position
Hey Rodrigo,
You have to set the home position of your camera manipulator and make a
call to home(1). You can force the delta time with a 1.
Sam
On Mon, Jan 7, 2019 at 6:48 PM Rodrigo Dias wrote:
> Hi,
>
> I'm able to change the camera's position with TrackballManipulator.
> However, I'd like to change the camera's initial position, but all the
> examples I've found just won't work. My source code is:
>
>
> Code:
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
> #include
>
> using namespace std;
> using namespace osg;
> using namespace osgEarth;
> using namespace osgEarth::Drivers;
>
> int main (int argc, char** argv) {
> MapOptions mapOpt;
> mapOpt.coordSysType() = MapOptions::CSTYPE_PROJECTED;
> mapOpt.profile() = ProfileOptions("plate-carre");
> osg::ref_ptr map = new Map(mapOpt);
> {
> GDALOptions gdal;
> gdal.url() = "br_modified.tif";
> osg::ref_ptr layer = new ImageLayer( "BR",
> gdal );
> map->addLayer( layer );
> }
> {
> GDALOptions gdal;
> gdal.url() = "BRalt.tif";
> osg::ref_ptr layer = new ElevationLayer(
> "SRTM", gdal );
> map->addLayer( layer );
> }
> osg::ref_ptr mapNode = new MapNode( map );
> osgViewer::Viewer viewer;
> viewer.setSceneData( mapNode.get() );
> viewer.setCameraManipulator( new osgGA::TrackballManipulator );
>
> Vec3 eye( 1.0, 5.0, 10.0 ); // The position of your
> camera
> Vec3 center( 0.0, 0.0, 0.0 ); // The point your camera is looking
> at
> Vec3 up( 0.0, 1.0, 0.0 ); // The up-vector of your camera - this
> controls how your viewport will be rotated about its center and should be
> equal to [0, 1, 0] in a conventional graphics coordinate system
> viewer.getCamera()->setViewMatrixAsLookAt( eye, center, up );
> while ( !viewer.done() ) {
> viewer.frame();
> }
> return 0;
> }
>
>
>
>
> No matter which values I use for "eye", the camera always begins in the
> same position. Why is that?
>
> Thank you!
>
> Cheers,
> Rodrigo
>
> --
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=75411#75411
>
>
>
>
>
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[osg-users] setViewMatrixAsLookAt not working to set the initial camera position
Hi,
I'm able to change the camera's position with TrackballManipulator. However,
I'd like to change the camera's initial position, but all the examples I've
found just won't work. My source code is:
Code:
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
using namespace std;
using namespace osg;
using namespace osgEarth;
using namespace osgEarth::Drivers;
int main (int argc, char** argv) {
MapOptions mapOpt;
mapOpt.coordSysType() = MapOptions::CSTYPE_PROJECTED;
mapOpt.profile() = ProfileOptions("plate-carre");
osg::ref_ptr map = new Map(mapOpt);
{
GDALOptions gdal;
gdal.url() = "br_modified.tif";
osg::ref_ptr layer = new ImageLayer( "BR", gdal );
map->addLayer( layer );
}
{
GDALOptions gdal;
gdal.url() = "BRalt.tif";
osg::ref_ptr layer = new ElevationLayer(
"SRTM", gdal );
map->addLayer( layer );
}
osg::ref_ptr mapNode = new MapNode( map );
osgViewer::Viewer viewer;
viewer.setSceneData( mapNode.get() );
viewer.setCameraManipulator( new osgGA::TrackballManipulator );
Vec3 eye( 1.0, 5.0, 10.0 ); // The position of your camera
Vec3 center( 0.0, 0.0, 0.0 ); // The point your camera is looking at
Vec3 up( 0.0, 1.0, 0.0 ); // The up-vector of your camera - this
controls how your viewport will be rotated about its center and should be equal
to [0, 1, 0] in a conventional graphics coordinate system
viewer.getCamera()->setViewMatrixAsLookAt( eye, center, up );
while ( !viewer.done() ) {
viewer.frame();
}
return 0;
}
No matter which values I use for "eye", the camera always begins in the same
position. Why is that?
Thank you!
Cheers,
Rodrigo
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