#ifndef jbt_query_h
#define jbt_query_h

class jbt_object;
class jbt_node;


class jbt_query
{
    struct child
    {
        child( jbt_query* _q ) : q(_q), n(0) {};
        ~child() { if(n) delete n; }
        jbt_query* q;
        child* n;
    } * fc, * lc;

    friend class iter;
    
public:


    jbt_query( const jVec3&, jbt_object* );


    virtual ~jbt_query();


    const jVec3& getPoint() const { return pt; }


    void setPoint( const jVec3& _pt ) { pt = _pt; }


    jFlt field();


    const jNorm3& normal();


    void addChild( jbt_object* );


    class iter
    {
    public:

        iter( jbt_query* q ) : i(q->fc) {};
        

        jbt_query* child() { return i ? i->q : 0; }


        void operator++() { i = i ? i->n : 0; }


        operator bool () { return i!=0; }

    private:
        jbt_query::child* i;
    };

private:
    
    jbt_query();

    void buildKids();

    jULng flgs;

    bool on( jULng f ) const { return flgs&fField; }
    bool off( jULng f ) const { return !on(f); }
    void setOn( jULng f ) { flgs |= f; }
    void setOff( jULng f ) { flgs = flgs&(~f); }

    static const jULng fField;
    static const jULng fNormal;

    static const jULng fTransform;
    jMat4 T;

    static const jULng fField;
    static const jULng fNormal;
    
    // Implicit surface data ...
    jNorm3 N;
    jFlt fv;
    
    jVec3 pt;
    jbt_object* obj;

    
};

#endif jbt_query_h