FGFS-4.1/OpenSceneGraph
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Added convinience constructors to help support picking with the new osgUtil::Intersector classes.

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This commit is contained in:
Robert Osfield
2006-11-02 17:05:46 +00:00
parent 7d12b85632
commit 06cca16a2a
3 changed files with 92 additions and 39 deletions
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40
examples/osgkeyboardmouse/osgkeyboardmouse.cpp
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@@ -191,29 +191,25 @@ public:
bool usePolytopePicking = true;
if (usePolytopePicking)
{
#if 0
// use window coordinates
// remap the mouse x,y into viewport coordinates.
osg::Viewport* viewport = viewer->getCamera()->getViewport();
float mx = viewport->x() + (int)((float)viewport->width()*(ea.getXnormalized()*0.5f+0.5f));
float my = viewport->y() + (int)((float)viewport->height()*(ea.getYnormalized()*0.5f+0.5f));
float width = 10.0f;
float height = 10.0f;
float min_x = mx - width*0.5;
float max_x = mx + width*0.5;
float min_y = my - height*0.5;
float max_y = my + height*0.5;
osg::Polytope polytope;
polytope.add(osg::Plane(1,0,0,-min_x));
polytope.add(osg::Plane(-1,0,0,max_x));
polytope.add(osg::Plane(0,1,0,-min_y));
polytope.add(osg::Plane(0,-1,0,max_y));
polytope.add(osg::Plane(0,0,1,0));
osgUtil::PolytopeIntersector* picker = new osgUtil::PolytopeIntersector( osgUtil::Intersector::WINDOW, polytope );
double mx = viewport->x() + (int)((double )viewport->width()*(ea.getXnormalized()*0.5+0.5));
double my = viewport->y() + (int)((double )viewport->height()*(ea.getYnormalized()*0.5+0.5));
// half width, height.
double w = 5.0f;
double h = 5.0f;
osgUtil::PolytopeIntersector* picker = new osgUtil::PolytopeIntersector( osgUtil::Intersector::WINDOW, mx-w, my-h, mx+w, my+h );
#else
double mx = ea.getXnormalized();
double my = ea.getYnormalized();
double w = 0.05;
double h = 0.05;
osgUtil::PolytopeIntersector* picker = new osgUtil::PolytopeIntersector( osgUtil::Intersector::PROJECTION, mx-w, my-h, mx+w, my+h );
#endif
osgUtil::IntersectionVisitor iv(picker);
viewer->getCamera()->accept(iv);
@@ -235,15 +231,15 @@ public:
{
#if 0
// use non dimension coordinates - in projection/clip space
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector(osgUtil::Intersector::PROJECTION, osg::Vec3d(ea.getXnormalized(),ea.getYnormalized(),-1.0), osg::Vec3d(ea.getXnormalized(),ea.getYnormalized(),1.0) );
// use non dimensional coordinates - in projection/clip space
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector( osgUtil::Intersector::PROJECTION, ea.getXnormalized(),ea.getYnormalized() );
#else
// use window coordinates
// remap the mouse x,y into viewport coordinates.
osg::Viewport* viewport = viewer->getCamera()->getViewport();
float mx = viewport->x() + (int)((float)viewport->width()*(ea.getXnormalized()*0.5f+0.5f));
float my = viewport->y() + (int)((float)viewport->height()*(ea.getYnormalized()*0.5f+0.5f));
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector(osgUtil::Intersector::WINDOW, osg::Vec3d(mx,my,0.0), osg::Vec3d(mx,my,1.0) );
osgUtil::LineSegmentIntersector* picker = new osgUtil::LineSegmentIntersector( osgUtil::Intersector::WINDOW, mx, my );
#endif
osgUtil::IntersectionVisitor iv(picker);