Osg-OsgEarth设置视点（水平方位角、垂直俯仰角、焦距）

 垂直俯仰角

Osg焦距

 Osg水平方位角

相关资料：

https://blog.csdn.net/weixin_30604651/article/details/97294201

实例：

.h

    osg::ref_ptr<osgEarth::Util::EarthManipulator> m_pEarthManip;

.cpp

增加操作

    m_pEarthManip = new osgEarth::Util::EarthManipulator;
    m_pViewer->setCameraManipulator(m_pEarthManip);//必须在setViewpoint之前

修改位置

// 垂直俯仰角
void Widget::on_setplane(int value)
{
    qDebug() << "heading: " << m_pEarthManip->getViewpoint().heading()->getValue();
    qDebug() << "pitch: " << m_pEarthManip->getViewpoint().pitch()->getValue();
    qDebug() << "range: " << m_pEarthManip->getViewpoint().range()->getValue();

    osgEarth::Viewpoint vp( "", 107.85, 32.35, 0.0,
                            m_pEarthManip->getViewpoint().heading()->getValue() ,
                            value,
                            m_pEarthManip->getViewpoint().range()->getValue() );
    m_pEarthManip->setViewpoint( vp, 2 );
}
// 水平方位角
void Widget::on_setcourse(int value)
{
    osgEarth::Viewpoint vp( "", 107.85, 32.35, 0.0,
                            value ,
                            m_pEarthManip->getViewpoint().pitch()->getValue(),
                            m_pEarthManip->getViewpoint().range()->getValue() );
    m_pEarthManip->setViewpoint( vp, 2 );
}
// 焦距
void Widget::on_setrange(int value)
{
    osgEarth::Viewpoint vp( "", 107.85, 32.35, 0.0,
                            m_pEarthManip->getViewpoint().heading()->getValue() ,
                            m_pEarthManip->getViewpoint().pitch()->getValue(),
                            value );
    m_pEarthManip->setViewpoint( vp, 2 );
}