FGFS-4.1/OpenSceneGraph
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Fixed the computation of the spot light direction.

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This commit is contained in:
Robert Osfield
2013-05-28 10:46:47 +00:00
parent d7931e3024
commit 81b6c82d9a
1 changed files with 7 additions and 4 deletions
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11
src/osgPlugins/OpenFlight/PrimaryRecords.cpp
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@@ -1029,10 +1029,13 @@ protected:
// Apply yaw and pitch for infinite and spot light.
if ((w==0.0) || (light->getSpotCutoff()<180.0))
{
// TODO: What direction is zero yaw and pitch?
osg::Quat rotation = ( osg::Quat(osg::inDegrees(double(yaw)),osg::Vec3(0.0,0.0,1.0)) *
osg::Quat(osg::inDegrees(double(pitch)),osg::Vec3(1.0,0.0,0.0)) );
light->setDirection(rotation*osg::Vec3(0.0,1.0,0.0));
// assume yaw is zero along y axis, increase positive clockwise
// assume patch is zero along xy plane, increase positive upwards
float cos_yaw = cosf(osg::inDegrees(yaw));
float sin_yaw = sinf(osg::inDegrees(yaw));
float cos_pitch = cosf(osg::inDegrees(pitch));
float sin_pitch = sinf(osg::inDegrees(pitch));
light->setDirection(osg::Vec3(sin_yaw*cos_pitch, cos_yaw*cos_pitch, sin_pitch));
}
_lightSource->setLight(light);