allwpilib/wpimath/src/main/native/cpp/geometry/Translation2d.cpp

// Copyright (c) FIRST and other WPILib contributors.
// Open Source Software; you can modify and/or share it under the terms of
// the WPILib BSD license file in the root directory of this project.

#include "frc/geometry/Translation2d.h"

#include <algorithm>

#include <wpi/json.h>

#include "units/math.h"

using namespace frc;

Translation2d::Translation2d(const Eigen::Vector2d& vector)
    : m_x{units::meter_t{vector.x()}}, m_y{units::meter_t{vector.y()}} {}

units::meter_t Translation2d::Norm() const {
  return units::math::hypot(m_x, m_y);
}

Translation2d Translation2d::Nearest(
    std::span<const Translation2d> translations) const {
  return *std::min_element(translations.begin(), translations.end(),
                           [this](Translation2d a, Translation2d b) {
                             return this->Distance(a) < this->Distance(b);
                           });
}

Translation2d Translation2d::Nearest(
    std::initializer_list<Translation2d> translations) const {
  return *std::min_element(translations.begin(), translations.end(),
                           [this](Translation2d a, Translation2d b) {
                             return this->Distance(a) < this->Distance(b);
                           });
}

void frc::to_json(wpi::json& json, const Translation2d& translation) {
  json =
      wpi::json{{"x", translation.X().value()}, {"y", translation.Y().value()}};
}

void frc::from_json(const wpi::json& json, Translation2d& translation) {
  translation = Translation2d{units::meter_t{json.at("x").get<double>()},
                              units::meter_t{json.at("y").get<double>()}};
}