BVH3.h

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/*

             *
            ***
           *****
   *********************       Mercenaries Engineering SARL
     *****************              Copyright (C) 2018
       *************
         *********        http://www.mercenaries-engineering.com
        ***********
       ****     ****
      **           **

*/
#pragma once

#include <gsl/span>
#include <functional>

#include "Value.h"

  namespace maquina
  {
    class MAQUINA_EXPORT BVH3 : public Value
    {
    public:

      BVH3();


      BVH3(const Value &v);

      BVH3(
        const gsl::span<const Imath::V3f> &points,  
        int obj_per_leaf=4                          
      );

      BVH3(
        const gsl::span<const Imath::Box3f> &boxes,  
        int obj_per_leaf=4                           
      );


      void select(
        const Imath::V3f &position,   // The position from where the selection is done
        float max_distance,           // The maximum distance selection
        std::vector<uint32_t> &result // The selected object indices. The vector is not cleared. New indices are pushed at the end.
      ) const;


      int closest(
        const Imath::V3f &position,
        float& max_distance,
        const std::function<float(int entry, const Imath::V3f& p)>& distance,
        bool use_square_distance
      ) const;

      BVH3(std::shared_ptr<Impl> impl) { _impl=impl; }
    };
  }