Hi Lars,
I haven't heard reports of problem before, but perhaps no one has
looked close enough. Could you send me the whole modified file so I
can review it side by side against the original.
Thanks,
Robert.
On Mon, Mar 17, 2008 at 2:43 PM, Nilsson Lars
<[EMAIL PROTECTED]> wrote:
>
>
>
>
> Hi
>
>
>
>
>
> When I tested airport lighting with OpenSceneGraph, the directional light
> did not work the way I expected.
>
> The light was visible a bit outside the defined sector. Especially for the
> PAPI (Precision Approach Path Indicator),
>
> it is important that the angles are correct.
>
>
>
> After rewriting a small piece of code in osgSim/Sector.cpp it seemed to work
> as I wanted.
>
>
>
> The change made was in the function computeMatrix() as shown below.
>
>
>
> void DirectionalSector::computeMatrix()
>
> {
>
> double heading = atan2(_direction[0], _direction[1]);
>
> double pitch = atan2(_direction[2], sqrt(_direction[0]*_direction[0] +
> _direction[1]*_direction[1]));
>
> double roll = _rollAngle;
>
>
>
> _local_to_LP = osg::Matrixd::identity();
>
> _local_to_LP.preMult(osg::Matrix::rotate(heading, 0.0, 0.0, -1.0));
>
> _local_to_LP.preMult(osg::Matrix::rotate(pitch, 1.0, 0.0, 0.0));
>
> _local_to_LP.preMult(osg::Matrix::rotate(roll, 0.0, 1.0, 0.0));
>
> }
>
>
>
> I am certainly not sure if this change is correct in all aspects, but it
> solved at least the problem for me.
>
>
>
> Has anyone else discovered similar problem about light points?
>
>
>
> Regards,
>
> Lars Nilsson
>
>
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>
>
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