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 <iostream>
#include <osg/Camera>
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgViewer/Viewer>
#include <osgEarth/ImageLayer>
#include <osgEarth/Map>
#include <osgEarth/MapNode>
#include <osgEarthDrivers/tms/TMSOptions>
#include <osgEarthDrivers/gdal/GDALOptions>
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> map = new Map(mapOpt);
{
GDALOptions gdal;
gdal.url() = "br_modified.tif";
osg::ref_ptr<ImageLayer> layer = new ImageLayer( "BR", gdal );
map->addLayer( layer );
}
{
GDALOptions gdal;
gdal.url() = "BRalt.tif";
osg::ref_ptr<ElevationLayer> layer = new ElevationLayer(
"SRTM", gdal );
map->addLayer( layer );
}
osg::ref_ptr<MapNode> mapNode = new MapNode( map );
osgViewer::Viewer viewer;
viewer.setSceneData( mapNode.get() );
viewer.setCameraManipulator( new osgGA::TrackballManipulator );
Vec3 eye( 10000.0, 50000.0, 100000.0 ); // 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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