assimp.assimp/include/assimp/vector3.h

/*
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Open Asset Import Library (assimp)
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  following disclaimer.

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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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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