magnum/src/Math/Vector4.h

#ifndef Magnum_Math_Vector4_h
#define Magnum_Math_Vector4_h
/*
    This file is part of Magnum.

    Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz>

    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
    to deal in the Software without restriction, including without limitation
    the rights to use, copy, modify, merge, publish, distribute, sublicense,
    and/or sell copies of the Software, and to permit persons to whom the
    Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included
    in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    DEALINGS IN THE SOFTWARE.
*/

/** @file
 * @brief Class Magnum::Math::Vector4
 */

#include "Vector3.h"

namespace Magnum { namespace Math {

/**
@brief Four-component vector
@tparam T   Data type

See @ref matrix-vector for brief introduction.
@see Magnum::Vector4, Magnum::Vector4i, Magnum::Vector4ui, Magnum::Vector4d
@configurationvalueref{Magnum::Math::Vector4}
*/
template<class T> class Vector4: public Vector<4, T> {
    public:
        /** @copydoc Vector::Vector() */
        constexpr /*implicit*/ Vector4() {}

        /** @copydoc Vector::Vector(T) */
        constexpr explicit Vector4(T value): Vector<4, T>(value) {}

        /**
         * @brief Constructor
         *
         * @f[
         *      \boldsymbol v = \begin{pmatrix} x \\ y \\ z \\ w \end{pmatrix}
         * @f]
         */
        constexpr /*implicit*/ Vector4(T x, T y, T z, T w): Vector<4, T>(x, y, z, w) {}

        /**
         * @brief Constructor
         *
         * @f[
         *      \boldsymbol v = \begin{pmatrix} v_x \\ v_y \\ v_z \\ w \end{pmatrix}
         * @f]
         */
        constexpr /*implicit*/ Vector4(const Vector3<T>& xyz, T w): Vector<4, T>(xyz[0], xyz[1], xyz[2], w) {}

        /** @copydoc Vector::Vector(const Vector<size, U>&) */
        template<class U> constexpr explicit Vector4(const Vector<4, U>& other): Vector<4, T>(other) {}

        /** @brief Construct vector from external representation */
        template<class U, class V = decltype(Implementation::VectorConverter<4, T, U>::from(std::declval<U>()))> constexpr explicit Vector4(const U& other): Vector<4, T>(Implementation::VectorConverter<4, T, U>::from(other)) {}

        /** @brief Copy constructor */
        constexpr Vector4(const Vector<4, T>& other): Vector<4, T>(other) {}

        T& x() { return (*this)[0]; }                   /**< @brief X component */
        constexpr T x() const { return (*this)[0]; }    /**< @overload */
        T& y() { return (*this)[1]; }                   /**< @brief Y component */
        constexpr T y() const { return (*this)[1]; }    /**< @overload */
        T& z() { return (*this)[2]; }                   /**< @brief Z component */
        constexpr T z() const { return (*this)[2]; }    /**< @overload */
        T& w() { return (*this)[3]; }                   /**< @brief W component */
        constexpr T w() const { return (*this)[3]; }    /**< @overload */

        /**
         * @brief XYZ part of the vector
         * @return First three components of the vector
         *
         * @see swizzle()
         */
        Vector3<T>& xyz() { return Vector3<T>::from(Vector<4, T>::data()); }
        constexpr const Vector3<T> xyz() const { return {x(), y(), z()}; } /**< @overload */

        /**
         * @brief XY part of the vector
         * @return First two components of the vector
         *
         * @see swizzle()
         */
        Vector2<T>& xy() { return Vector2<T>::from(Vector<4, T>::data()); }
        constexpr const Vector2<T> xy() const { return {x(), y()}; } /**< @overload */

        MAGNUM_VECTOR_SUBCLASS_IMPLEMENTATION(Vector4, 4)
};

MAGNUM_VECTOR_SUBCLASS_OPERATOR_IMPLEMENTATION(Vector4, 4)

/** @debugoperator{Magnum::Math::Vector4} */
template<class T> inline Corrade::Utility::Debug operator<<(Corrade::Utility::Debug debug, const Vector4<T>& value) {
    return debug << static_cast<const Vector<4, T>&>(value);
}

}}

namespace Corrade { namespace Utility {
    /** @configurationvalue{Magnum::Math::Vector4} */
    template<class T> struct ConfigurationValue<Magnum::Math::Vector4<T>>: public ConfigurationValue<Magnum::Math::Vector<4, T>> {};
}}

#endif