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SpaceIm committed Jan 29, 2022
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402 changes: 201 additions & 201 deletions include/fcl/math/detail/polysolver-inl.h

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160 changes: 80 additions & 80 deletions include/fcl/math/detail/polysolver.h
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/*
* Software License Agreement (BSD License)
*
* Copyright (c) 2011-2014, Willow Garage, Inc.
* Copyright (c) 2014-2016, Open Source Robotics Foundation
* 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.
*/

/** @author Jia Pan */

#ifndef FCL_NARROWPHASE_DETAIL_POLYSOLVER_H
#define FCL_NARROWPHASE_DETAIL_POLYSOLVER_H

#include "fcl/export.h"

namespace fcl
{

namespace detail {

/// @brief A class solves polynomial degree (1,2,3) equations
template <typename S>
class PolySolver
{
public:
/// @brief Solve a linear equation with coefficients c, return roots s and number of roots
static int solveLinear(S c[2], S s[1]);

/// @brief Solve a quadratic function with coefficients c, return roots s and number of roots
static int solveQuadric(S c[3], S s[2]);

/// @brief Solve a cubic function with coefficients c, return roots s and number of roots
static int solveCubic(S c[4], S s[3]);

private:
/// @brief Check whether v is zero
static bool isZero(S v);

/// @brief Compute v^{1/3}
static bool cbrt(S v);

static constexpr S getNearZeroThreshold();
};

using PolySolverf = PolySolver<float>;
using PolySolverd = PolySolver<double>;

} // namespace detail
} // namespace fcl

#include "fcl/math/detail/polysolver-inl.h"

#endif
/*
* Software License Agreement (BSD License)
*
* Copyright (c) 2011-2014, Willow Garage, Inc.
* Copyright (c) 2014-2016, Open Source Robotics Foundation
* 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.
*/

/** @author Jia Pan */

#ifndef FCL_NARROWPHASE_DETAIL_POLYSOLVER_H
#define FCL_NARROWPHASE_DETAIL_POLYSOLVER_H

#include "fcl/export.h"

namespace fcl
{

namespace detail {

/// @brief A class solves polynomial degree (1,2,3) equations
template <typename S>
class PolySolver
{
public:
/// @brief Solve a linear equation with coefficients c, return roots s and number of roots
static int solveLinear(S c[2], S s[1]);

/// @brief Solve a quadratic function with coefficients c, return roots s and number of roots
static int solveQuadric(S c[3], S s[2]);

/// @brief Solve a cubic function with coefficients c, return roots s and number of roots
static int solveCubic(S c[4], S s[3]);

private:
/// @brief Check whether v is zero
static bool isZero(S v);

/// @brief Compute v^{1/3}
static bool cbrt(S v);

static constexpr S getNearZeroThreshold();
};

using PolySolverf = PolySolver<float>;
using PolySolverd = PolySolver<double>;

} // namespace detail
} // namespace fcl

#include "fcl/math/detail/polysolver-inl.h"

#endif
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