devshgraphicsprogramming

template <class T>
class STLCompatibleGPUAllocator : public irr::core::AllocatorTrivialBase<T>
{
    public:
        typedef size_t	size_type;
        typedef T*		pointer;
        template< class U> struct rebind { typedef STLCompatibleGPUAllocator<U> other; };

        STLCompatibleGPUAllocator() {}

devshgraphicsprogramming

///float tripleProductCoefficients[121][36][9];
///bool tripleProductCoefficientSparsityMask[121][121][121];
bool tripleProductCoefficientSparsityMask[121][36][9];

/**
void calculateTripleProductCoefficients()
{
    float tripleComplexProductCoefficients[9][36][121];
    memset(tripleComplexProductCoefficients,0,sizeof(float)*9*36*121);

devshgraphicsprogramming

//!Warning does not model intersection with the Planet itself in the middle of the atmosphere
float calculateHazeFactor(in float fragDepth, in vec3 viewDir)
{
    //hazeHeight and camPos are heights above sea level 
    bool aboveHaze = camPos>hazeHeight;
    if (aboveHaze&&viewDir.y>=0.0)
        return 1.0;

    float planetRadius = 6357.0;
    float hazeRadius = planetRadius+hazeHeight;