///////////////////////////////////////////////////////////////////////////

//

// Copyright (c) 2002-2012, Industrial Light & Magic, a division of Lucas

// Digital Ltd. LLC

// 

// All rights reserved.

// 

// Redistribution and use 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 Industrial Light & Magic nor the names of

// its contributors may be used to endorse or promote products derived

// from this software without specific prior written permission. 

// 

// 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,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

///////////////////////////////////////////////////////////////////////////

//----------------------------------------------------------------------------

//

//      Specializations of the Vec2<T> and Vec3<T> templates.

//

//----------------------------------------------------------------------------

#include "ImathVec.h"

#include "ImathExport.h"

#if (defined _WIN32 || defined _WIN64) && defined _MSC_VER

// suppress exception specification warnings

#pragma warning(disable:4290)

#endif

IMATH_INTERNAL_NAMESPACE_SOURCE_ENTER

namespace

{

template<class T>

bool

normalizeOrThrow(Vec2<T> &v)

{

    int axis = -1;

    for (int i = 0; i < 2; i ++)

    {

        if (v[i] != 0)

        {

            if (axis != -1)

            {

                throw IntVecNormalizeExc ("Cannot normalize an integer "

                                          "vector unless it is parallel "

                                          "to a principal axis");

            }

            axis = i;

        }

    }

    v[axis] = (v[axis] > 0) ? 1 : -1;

    return true;

}

template<class T>

bool

normalizeOrThrow(Vec3<T> &v)

{

    int axis = -1;

    for (int i = 0; i < 3; i ++)

    {

        if (v[i] != 0)

        {

            if (axis != -1)

            {

                throw IntVecNormalizeExc ("Cannot normalize an integer "

                                          "vector unless it is parallel "

                                          "to a principal axis");

            }

            axis = i;

        }

    }

    v[axis] = (v[axis] > 0) ? 1 : -1;

    return true;

}

template<class T>

bool

normalizeOrThrow(Vec4<T> &v)

{

    int axis = -1;

    for (int i = 0; i < 4; i ++)

    {

        if (v[i] != 0)

        {

            if (axis != -1)

            {

                throw IntVecNormalizeExc ("Cannot normalize an integer "

                                          "vector unless it is parallel "

                                          "to a principal axis");

            }

            axis = i;

        }

    }

    v[axis] = (v[axis] > 0) ? 1 : -1;

    return true;

}

}

// Vec2<short>

template <> 

IMATH_EXPORT

short

Vec2<short>::length () const

{

    float lenF = Math<float>::sqrt ((float)dot (*this));

    short lenS = (short) (lenF + 0.5f);

    return lenS;

}

template <>

IMATH_EXPORT

const Vec2<short> &

Vec2<short>::normalize ()

{

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec2<short> &

Vec2<short>::normalizeExc () throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec2<short> &

Vec2<short>::normalizeNonNull ()

{

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

Vec2<short>

Vec2<short>::normalized () const

{

    Vec2<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec2<short>

Vec2<short>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    Vec2<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec2<short>

Vec2<short>::normalizedNonNull () const

{

    Vec2<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

// Vec2<int>

template <> 

IMATH_EXPORT

int

Vec2<int>::length () const

{

    float lenF = Math<float>::sqrt ((float)dot (*this));

    int lenI = (int) (lenF + 0.5f);

    return lenI;

}

template <>

IMATH_EXPORT

const Vec2<int> &

Vec2<int>::normalize ()

{

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec2<int> &

Vec2<int>::normalizeExc () throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec2<int> &

Vec2<int>::normalizeNonNull ()

{

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

Vec2<int>

Vec2<int>::normalized () const

{

    Vec2<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec2<int>

Vec2<int>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    Vec2<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec2<int>

Vec2<int>::normalizedNonNull () const

{

    Vec2<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

// Vec3<short>

template <> 

IMATH_EXPORT

short

Vec3<short>::length () const

{

    float lenF = Math<float>::sqrt ((float)dot (*this));

    short lenS = (short) (lenF + 0.5f);

    return lenS;

}

template <>

IMATH_EXPORT

const Vec3<short> &

Vec3<short>::normalize ()

{

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec3<short> &

Vec3<short>::normalizeExc () throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0) && (z == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec3<short> &

Vec3<short>::normalizeNonNull ()

{

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

Vec3<short>

Vec3<short>::normalized () const

{

    Vec3<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec3<short>

Vec3<short>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0) && (z == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    Vec3<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec3<short>

Vec3<short>::normalizedNonNull () const

{

    Vec3<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

// Vec3<int>

template <> 

IMATH_EXPORT

int

Vec3<int>::length () const

{

    float lenF = Math<float>::sqrt ((float)dot (*this));

    int lenI = (int) (lenF + 0.5f);

    return lenI;

}

template <>

IMATH_EXPORT

const Vec3<int> &

Vec3<int>::normalize ()

{

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec3<int> &

Vec3<int>::normalizeExc () throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0) && (z == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec3<int> &

Vec3<int>::normalizeNonNull ()

{

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

Vec3<int>

Vec3<int>::normalized () const

{

    Vec3<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec3<int>

Vec3<int>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0) && (z == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    Vec3<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec3<int>

Vec3<int>::normalizedNonNull () const

{

    Vec3<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

// Vec4<short>

template <> 

IMATH_EXPORT

short

Vec4<short>::length () const

{

    float lenF = Math<float>::sqrt ((float)dot (*this));

    short lenS = (short) (lenF + 0.5f);

    return lenS;

}

template <>

IMATH_EXPORT

const Vec4<short> &

Vec4<short>::normalize ()

{

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec4<short> &

Vec4<short>::normalizeExc () throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0) && (z == 0) && (w == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec4<short> &

Vec4<short>::normalizeNonNull ()

{

    normalizeOrThrow<short>(*this);

    return *this;

}

template <>

IMATH_EXPORT

Vec4<short>

Vec4<short>::normalized () const

{

    Vec4<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec4<short>

Vec4<short>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0) && (z == 0) && (w == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    Vec4<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec4<short>

Vec4<short>::normalizedNonNull () const

{

    Vec4<short> v(*this);

    normalizeOrThrow<short>(v);

    return v;

}

// Vec4<int>

template <> 

IMATH_EXPORT

int

Vec4<int>::length () const

{

    float lenF = Math<float>::sqrt ((float)dot (*this));

    int lenI = (int) (lenF + 0.5f);

    return lenI;

}

template <>

IMATH_EXPORT

const Vec4<int> &

Vec4<int>::normalize ()

{

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec4<int> &

Vec4<int>::normalizeExc () throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0) && (z == 0) && (w == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

const Vec4<int> &

Vec4<int>::normalizeNonNull ()

{

    normalizeOrThrow<int>(*this);

    return *this;

}

template <>

IMATH_EXPORT

Vec4<int>

Vec4<int>::normalized () const

{

    Vec4<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec4<int>

Vec4<int>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)

{

    if ((x == 0) && (y == 0) && (z == 0) && (w == 0))

        throw NullVecExc ("Cannot normalize null vector.");

    Vec4<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

template <>

IMATH_EXPORT

Vec4<int>

Vec4<int>::normalizedNonNull () const

{

    Vec4<int> v(*this);

    normalizeOrThrow<int>(v);

    return v;

}

IMATH_INTERNAL_NAMESPACE_SOURCE_EXIT