Program Listing for File morton-inl.h

↰ Return to documentation for file (/tmp/ws/src/hpp-fcl/include/hpp/fcl/broadphase/detail/morton-inl.h)

/*
 * Software License Agreement (BSD License)
 *
 *  Copyright (c) 2011-2014, Willow Garage, Inc.
 *  Copyright (c) 2014-2016, Open Source Robotics Foundation
 *  Copyright (c) 2016, Toyota Research Institute
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of Open Source Robotics Foundation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 *  COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 *  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef HPP_FCL_MORTON_INL_H
#define HPP_FCL_MORTON_INL_H

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

namespace hpp {
namespace fcl {
namespace detail {

//==============================================================================
template <typename S>
uint32_t quantize(S x, uint32_t n) {
  return std::max(std::min((uint32_t)(x * (S)n), uint32_t(n - 1)), uint32_t(0));
}

//==============================================================================
template <typename S>
morton_functor<S, uint32_t>::morton_functor(const AABB& bbox)
    : base(bbox.min_),
      inv(1.0 / (bbox.max_[0] - bbox.min_[0]),
          1.0 / (bbox.max_[1] - bbox.min_[1]),
          1.0 / (bbox.max_[2] - bbox.min_[2])) {
  // Do nothing
}

//==============================================================================
template <typename S>
uint32_t morton_functor<S, uint32_t>::operator()(const Vec3f& point) const {
  uint32_t x = detail::quantize((point[0] - base[0]) * inv[0], 1024u);
  uint32_t y = detail::quantize((point[1] - base[1]) * inv[1], 1024u);
  uint32_t z = detail::quantize((point[2] - base[2]) * inv[2], 1024u);

  return detail::morton_code(x, y, z);
}

//==============================================================================
template <typename S>
morton_functor<S, uint64_t>::morton_functor(const AABB& bbox)
    : base(bbox.min_),
      inv(1.0 / (bbox.max_[0] - bbox.min_[0]),
          1.0 / (bbox.max_[1] - bbox.min_[1]),
          1.0 / (bbox.max_[2] - bbox.min_[2])) {
  // Do nothing
}

//==============================================================================
template <typename S>
uint64_t morton_functor<S, uint64_t>::operator()(const Vec3f& point) const {
  uint32_t x = detail::quantize((point[0] - base[0]) * inv[0], 1u << 20);
  uint32_t y = detail::quantize((point[1] - base[1]) * inv[1], 1u << 20);
  uint32_t z = detail::quantize((point[2] - base[2]) * inv[2], 1u << 20);

  return detail::morton_code60(x, y, z);
}

//==============================================================================
template <typename S>
constexpr size_t morton_functor<S, uint64_t>::bits() {
  return 60;
}

//==============================================================================
template <typename S>
constexpr size_t morton_functor<S, uint32_t>::bits() {
  return 30;
}

//==============================================================================
template <typename S, size_t N>
morton_functor<S, std::bitset<N>>::morton_functor(const AABB& bbox)
    : base(bbox.min_),
      inv(1.0 / (bbox.max_[0] - bbox.min_[0]),
          1.0 / (bbox.max_[1] - bbox.min_[1]),
          1.0 / (bbox.max_[2] - bbox.min_[2])) {
  // Do nothing
}

//==============================================================================
template <typename S, size_t N>
std::bitset<N> morton_functor<S, std::bitset<N>>::operator()(
    const Vec3f& point) const {
  S x = (point[0] - base[0]) * inv[0];
  S y = (point[1] - base[1]) * inv[1];
  S z = (point[2] - base[2]) * inv[2];
  int start_bit = bits() - 1;
  std::bitset<N> bset;

  x *= 2;
  y *= 2;
  z *= 2;

  for (size_t i = 0; i < bits() / 3; ++i) {
    bset[start_bit--] = ((z < 1) ? 0 : 1);
    bset[start_bit--] = ((y < 1) ? 0 : 1);
    bset[start_bit--] = ((x < 1) ? 0 : 1);
    x = ((x >= 1) ? 2 * (x - 1) : 2 * x);
    y = ((y >= 1) ? 2 * (y - 1) : 2 * y);
    z = ((z >= 1) ? 2 * (z - 1) : 2 * z);
  }

  return bset;
}

//==============================================================================
template <typename S, size_t N>
constexpr size_t morton_functor<S, std::bitset<N>>::bits() {
  return N;
}

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

#endif