查看osg坐标系，camare默认姿态：http://www.cnblogs.com/lyggqm/p/8073688.html
首先搞清楚osg的坐标系以及osg::camare的默认姿态
下代码面实现了，在场景里放一只牛。相机使用动画漫游器
在动画中添加三个方向来观察牛。具体三方向姿态请参考代码
#include <iostream> #include <osg/MatrixTransform> #include <osgViewer/Viewer> #include <osgViewer/ViewerEventHandlers> #include <osgGA\AnimationPathManipulator> #include <osgDB\ReadFile> int main(int argc, char** argv) { osg::ArgumentParser arguments(&argc, argv); osgViewer::Viewer viewer(arguments); viewer.addEventHandler(new osgViewer::StatsHandler()); viewer.addEventHandler(new osgViewer::WindowSizeHandler()); osg::Group* root = new osg::Group(); root->addChild(osgDB::readNodeFile("cow.osg")); viewer.setSceneData(root); //使用动画漫游器 osgGA::AnimationPathManipulator *animationPathMp = new osgGA::AnimationPathManipulator(); //给动画漫游器添加关键帧 osg::AnimationPath* _animationPath = new osg::AnimationPath; //当出于模型右边，既x方向20处，为了看见模型 //要使相机沿着Y轴顺时针旋转90度 osg::Quat q1(osg::DegreesToRadians(90.0), osg::Y_AXIS); osg::Quat q2(osg::DegreesToRadians(90.0), osg::X_AXIS); q1 *= q2; osg::Quat q3(osg::DegreesToRadians(-90.0), osg::X_AXIS); osg::Quat q4(osg::DegreesToRadians(180.0), osg::Y_AXIS); q3 *= q4; osg::Quat q5(osg::DegreesToRadians(-90.0), osg::Z_AXIS); _animationPath->insert(0.0, osg::AnimationPath::ControlPoint(osg::Vec3d(30, 0, 0), q1)); _animationPath->insert(4.0, osg::AnimationPath::ControlPoint(osg::Vec3d(0, 30, 0), q3)); _animationPath->insert(8.0, osg::AnimationPath::ControlPoint(osg::Vec3d(0, 0, 30), q5)); //设置路径是回摆的 _animationPath->setLoopMode(osg::AnimationPath::SWING); animationPathMp->setAnimationPath(_animationPath); viewer.setCameraManipulator(animationPathMp); return viewer.run(); }
