morton.h

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#ifndef HPP_FCL_MORTON_H
#define HPP_FCL_MORTON_H

#include "hpp/fcl/BV/AABB.h"
#include <bitset>

namespace hpp {
namespace fcl {

namespace detail {

template <typename S>
uint32_t quantize(S x, uint32_t n);

HPP_FCL_DLLAPI
uint32_t morton_code(uint32_t x, uint32_t y, uint32_t z);

HPP_FCL_DLLAPI
uint64_t morton_code60(uint32_t x, uint32_t y, uint32_t z);

template <typename S, typename T>
struct morton_functor {};

template <typename S>
struct morton_functor<S, uint32_t> {
  morton_functor(const AABB& bbox);

  uint32_t operator()(const Vec3f& point) const;

  const Vec3f base;
  const Vec3f inv;

  static constexpr size_t bits();
};

using morton_functoru32f = morton_functor<float, uint32_t>;
using morton_functoru32d = morton_functor<FCL_REAL, uint32_t>;

template <typename S>
struct morton_functor<S, uint64_t> {
  morton_functor(const AABB& bbox);

  uint64_t operator()(const Vec3f& point) const;

  const Vec3f base;
  const Vec3f inv;

  static constexpr size_t bits();
};

template <typename S, size_t N>
struct morton_functor<S, std::bitset<N>> {
  static_assert(N % 3 == 0, "Number of bits must be a multiple of 3");

  morton_functor(const AABB& bbox);

  std::bitset<N> operator()(const Vec3f& point) const;

  const Vec3f base;
  const Vec3f inv;

  static constexpr size_t bits();
};

}  // namespace detail
}  // namespace fcl
}  // namespace hpp

#include "hpp/fcl/broadphase/detail/morton-inl.h"

#endif