HitRecord.h

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#ifndef HitRecord_h
#define HitRecord_h

class Material;
class Primitive;
#define EPSILON (1.e-6)

class HitRecord {
 public:
    HitRecord(double max) {
        prim = 0;
        matl = 0;
        min = max;
        epsilon = EPSILON;
    }
    HitRecord(double max, double ep) {
        prim = 0;
        matl = 0;
        min = max;
        epsilon = ep;
    }
    ~HitRecord() {
    }

    bool hit(double t, const Primitive* hit_prim, const Material* hit_matl) {
        if(t > epsilon && t < min){
            min = t;
            prim = hit_prim;
            matl = hit_matl;
            return true;
        } else {
            return false;
        }
    }
    double minT() const {
        return min;
    }
    const Primitive* getPrimitive() const {
        return prim;
    }
    const Material* getMaterial() const {
        return matl;
    }

    template< typename T >
        T* getScratchpad()
        {
            char unnamed[ ( sizeof( T ) <= sizeof( scratchdata ) ) ? 1 : 0 ];
            return reinterpret_cast< T * >( scratchdata );
        }
    template< typename T >
        const T* getScratchpad() const
        {
            char unnamed[ ( sizeof( T ) <= sizeof( scratchdata ) ) ? 1 : 0 ];
            return reinterpret_cast< const T * >( scratchdata );
        }
    char scratchdata[128];
 private:
    const Primitive* prim;
    const Material* matl;
    double min;
    double epsilon;

};

#endif

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