osg osgUtil::LineSegmentIntersector

 

#ifdef _WIN32
#include <Windows.h>
#endif // _WIN32

#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers> 
#include <osgViewer/CompositeViewer> 
#include <osgDB/ReadFile>
#include <osg/Geode>
#include <osg/Node>
#include <osgGA/TrackballManipulator>
#include <osg/GraphicsContext>
#include <osg/ShapeDrawable>
#include <osg/Material>
#include <osg/Image>
#include <osg/Texture2D>
#include <osg/TexEnv>
#include <osg/TexGen>
#include <osg/MatrixTransform>
#include <osg/PositionAttitudeTransform>
#include <osg/AnimationPath>
#include <osg/Matrixd>

#include <osgGA/GUIEventHandler>
#include <osgGA/CameraManipulator>
#include <osgGA/StandardManipulator>
#include <osgGA/OrbitManipulator>
#include <osgGA/TrackballManipulator>
#include <osgUtil/IntersectionVisitor>
#include <osgUtil/LineSegmentIntersector>


//创建盒子
osg::ref_ptr<osg::Geode> createBox()
{
    osg::ref_ptr<osg::Geode> geode1 = new osg::Geode;
    geode1->addDrawable(new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0,0.0,0.0),10.0,8.0,6.0)));
    geode1->addDrawable(new osg::ShapeDrawable(new osg::Box(osg::Vec3(0.0, 0.0, 0.0), 0.1, 0.1, 20)));
    return geode1;
}

int main()
{
    osg::ref_ptr<osgViewer::Viewer> viewer1 = new osgViewer::Viewer;
    osg::ref_ptr<osg::Group> group1 = new osg::Group;
    //osg::ref_ptr<osg::Node> node1 = osgDB::readNodeFile("D:\\参考手册\\BIM\\osg\\build1.OSGB");
    //group1->addChild(node1.get());

    osg::ref_ptr<osgUtil::LineSegmentIntersector> lineSegmentIntesector = new osgUtil::LineSegmentIntersector(osg::Vec3(0,0,15),osg::Vec3(0,0,-15));
    osg::ref_ptr<osgUtil::IntersectionVisitor> intersectionVisitor1 = new osgUtil::IntersectionVisitor(lineSegmentIntesector);


    group1->addChild(createBox());
    group1->accept(*intersectionVisitor1.get());

    osgUtil::LineSegmentIntersector::Intersections intersections;
    //输出交点
    if (lineSegmentIntesector->containsIntersections())
    {
        intersections = lineSegmentIntesector->getIntersections();
        osgUtil::LineSegmentIntersector::Intersections::iterator iter;
        for (iter = intersections.begin(); iter != intersections.end(); ++iter)
        {
            std::cout << "x:"<<iter->getWorldIntersectPoint().x() << "    y:" << iter->getWorldIntersectPoint().y() << "    z:" << iter->getWorldIntersectPoint().z() << std::endl;
        }
    }


    viewer1->setSceneData(group1.get());
    viewer1->setUpViewInWindow(200, 200, 800, 600, 0);

    return viewer1->run();
}