[osg-users] computeIntersections for Slave camera often return false

[Robert Osfield]

Hi Ran,

There isn't really any way for us to know what might be wrong as there are
just too many details about what you are doing.

Robert.

On 7 September 2015 at 02:20, Ran Chao <1530904175 at qq.com> wrote:

> Hi,
>
> I got a point (x,y) in a Slave camera image, and i want to know it's
> position in world coords, so i use computeIntersections(), my code:
>
>         osgUtil::LineSegmentIntersector::Intersections intersections;
>         if( !view->computeIntersections(camera.get(),
> osgUtil::Intersector::WINDOW, x, y, intersections) )
>                 return false;
>
>         const osgUtil::LineSegmentIntersector::Intersection& hit =
> *(intersections.begin());
>
>         out_intersect_point = hit.getWorldIntersectPoint();
>
> But computeIntersections() often return false, what's wrong?
>
> Thank you!
>
> Cheers,
> Ran
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=65034#65034
>
>
>
>
>
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