math_vector3.cpp

[詳解]

 
 
// Copyright(c) 2023-2025 Design Engineering Laboratory, Saitama University
// Released under the MIT license
// https://opensource.org/licenses/mit-license.php
 
#include "math_vector3.h"
 
#include <format>
#include <sstream>
 
#include "math_util.h"
 
 
namespace designlab
{
 
Vector3 Vector3::GetNormalized() const noexcept
{
    const float GetLength = this->GetLength();
 
    if (math_util::IsEqual(GetLength, 0.0f))
    {
        return { 0.0f, 0.0f, 0.0f };
    }
 
    // 割り算は遅いので，逆数をかける．
    const float inv_length = 1.0f / GetLength;
    return *this * inv_length;
}
 
std::string Vector3::ToString() const
{
    return std::format("( x : {}, y : {}, z : {} )",
        math_util::FloatingPointNumToString(x),
        math_util::FloatingPointNumToString(y),
        math_util::FloatingPointNumToString(z));
}
 
std::string Vector3::ToCsvString() const
{
    std::stringstream ss;
    ss << *this;
    return ss.str();
}
 
Vector3& Vector3::operator+=(const Vector3& other) noexcept
{
    x += other.x;
    y += other.y;
    z += other.z;
    return *this;
}
 
Vector3& Vector3::operator-=(const Vector3& other) noexcept
{
    x -= other.x;
    y -= other.y;
    z -= other.z;
    return *this;
}
 
Vector3& Vector3::operator*=(const float other) noexcept
{
    x *= other;
    y *= other;
    z *= other;
    return *this;
}
 
Vector3& Vector3::operator/=(const float other)
{
    x /= other;
    y /= other;
    z /= other;
    return *this;
}
 
}  // namespace designlab