#ifndef jbt_cache_h
#define jbt_cache_h

#include <jgl/jgl.h>

class jbt_blobtree;


class jbt_cache
{
public:


    jbt_cache( jbt_blobtree* );
    virtual ~jbt_cache();
    

    void restore();
    
    const jVec3& queryPoint() const { return qp; }

private:
    
    
    jVec3 qp;
    jFlt fv;            // field value
    jNorm3 N;           // normal vector
    jVec3 G;            // gradient vector
    jVec2 uvc;          // texture coordinate

    jULng cached;

    jbt_blobtree* tree;

    struct child
    {
        child( jbt_cache* _c, child* _n )
                : c(_c), n(_n)
            {}
        ~child()
            { if(c) delete c; 
              if(n) delete n; }
        void restore()
            { if(n) c->restore(); }
        jbt_cache* c;
        child* n;
    }
    * children;
};  

#endif