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#include "fog.hpp"
#include <osg/Matrix>
#include <osg/State>
namespace NifOsg
{
Fog::Fog()
: osg::Fog()
{
}
Fog::Fog(const Fog& copy, const osg::CopyOp& copyop)
: osg::Fog(copy, copyop)
, mDepth(copy.mDepth)
{
}
void Fog::apply(osg::State& state) const
{
osg::Fog::apply(state);
#ifdef OSG_GL_FIXED_FUNCTION_AVAILABLE
float fov, aspect, near, far;
state.getProjectionMatrix().getPerspective(fov, aspect, near, far);
glFogf(GL_FOG_START, near * mDepth + far * (1.f - mDepth));
glFogf(GL_FOG_END, far);
#endif
}
}
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