/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
---------------------------------------------------------------------------

Copyright (c) 2006-2018, assimp team



All rights reserved.

Redistribution and use of this software 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 the assimp team, nor the names of its
  contributors may be used to endorse or promote products
  derived from this software without specific prior
  written permission of the assimp team.

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,
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*/
/** @file vector3.h
 *  @brief 3D vector structure, including operators when compiling in C++
 */
#pragma once
#ifndef AI_VECTOR3D_H_INC
#define AI_VECTOR3D_H_INC

#ifdef __cplusplus
#   include <cmath>
#else
#   include <math.h>
#endif

#include "defs.h"

#ifdef __cplusplus

template<typename TReal> class aiMatrix3x3t;
template<typename TReal> class aiMatrix4x4t;

// ---------------------------------------------------------------------------
/** Represents a three-dimensional vector. */
template <typename TReal>
class aiVector3t
{
public:
    aiVector3t() : x(), y(), z() {}
    aiVector3t(TReal _x, TReal _y, TReal _z) : x(_x), y(_y), z(_z) {}
    explicit aiVector3t (TReal _xyz ) : x(_xyz), y(_xyz), z(_xyz) {}
    aiVector3t( const aiVector3t& o ) : x(o.x), y(o.y), z(o.z) {}

public:

    // combined operators
    const aiVector3t& operator += (const aiVector3t& o);
    const aiVector3t& operator -= (const aiVector3t& o);
    const aiVector3t& operator *= (TReal f);
    const aiVector3t& operator /= (TReal f);

    // transform vector by matrix
    aiVector3t& operator *= (const aiMatrix3x3t<TReal>& mat);
    aiVector3t& operator *= (const aiMatrix4x4t<TReal>& mat);

    // access a single element
    TReal operator[](unsigned int i) const;
    TReal& operator[](unsigned int i);

    // comparison
    bool operator== (const aiVector3t& other) const;
    bool operator!= (const aiVector3t& other) const;
    bool operator < (const aiVector3t& other) const;

    bool Equal(const aiVector3t& other, TReal epsilon = 1e-6) const;

    template <typename TOther>
    operator aiVector3t<TOther> () const;

public:
    /** @brief Set the components of a vector
     *  @param pX X component
     *  @param pY Y component
     *  @param pZ Z component  */
    void Set( TReal pX, TReal pY, TReal pZ);

    /** @brief Get the squared length of the vector
     *  @return Square length */
    TReal SquareLength() const;

    /** @brief Get the length of the vector
     *  @return length */
    TReal Length() const;


    /** @brief Normalize the vector */
    aiVector3t& Normalize();

    /** @brief Normalize the vector with extra check for zero vectors */
    aiVector3t& NormalizeSafe();

    /** @brief Componentwise multiplication of two vectors
     *
     *  Note that vec*vec yields the dot product.
     *  @param o Second factor */
    const aiVector3t SymMul(const aiVector3t& o);

    TReal x, y, z;
};


typedef aiVector3t<ai_real> aiVector3D;

#else

struct aiVector3D {
    ai_real x, y, z;
};

#endif // __cplusplus

#ifdef __cplusplus

#endif // __cplusplus

#endif // AI_VECTOR3D_H_INC
