ImathVec.cpp - This C++ code defines a set of classes for v…

/src/FreeImage/Source/OpenEXR/Imath/ImathVec.cpp

https://bitbucket.org/cabalistic/ogredeps/ · C++ · 540 lines · 414 code · 81 blank · 45 comment · 89 complexity · 447fbf5ebceb25691b2450ba43782830 MD5 · raw file

///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2002, 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,
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// 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"

#if (defined _WIN32 || defined _WIN64) && defined _MSC_VER
// suppress exception specification warnings
#pragma warning(disable:4290)
#endif


namespace Imath {

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 <> 
short
Vec2<short>::length () const
{
    float lenF = Math<float>::sqrt ((float)dot (*this));
    short lenS = (short) (lenF + 0.5f);
    return lenS;
}

template <>
const Vec2<short> &
Vec2<short>::normalize ()
{
    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
const Vec2<short> &
Vec2<short>::normalizeExc () throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
const Vec2<short> &
Vec2<short>::normalizeNonNull ()
{
    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
Vec2<short>
Vec2<short>::normalized () const
{
    Vec2<short> v(*this);
    normalizeOrThrow<short>(v);
    return v;
}

template <>
Vec2<short>
Vec2<short>::normalizedExc () const throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    Vec2<short> v(*this);
    normalizeOrThrow<short>(v);
    return v;
}

template <>
Vec2<short>
Vec2<short>::normalizedNonNull () const
{
    Vec2<short> v(*this);
    normalizeOrThrow<short>(v);
    return v;
}


// Vec2<int>

template <> 
int
Vec2<int>::length () const
{
    float lenF = Math<float>::sqrt ((float)dot (*this));
    int lenI = (int) (lenF + 0.5f);
    return lenI;
}

template <>
const Vec2<int> &
Vec2<int>::normalize ()
{
    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
const Vec2<int> &
Vec2<int>::normalizeExc () throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
const Vec2<int> &
Vec2<int>::normalizeNonNull ()
{
    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
Vec2<int>
Vec2<int>::normalized () const
{
    Vec2<int> v(*this);
    normalizeOrThrow<int>(v);
    return v;
}

template <>
Vec2<int>
Vec2<int>::normalizedExc () const throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    Vec2<int> v(*this);
    normalizeOrThrow<int>(v);
    return v;
}

template <>
Vec2<int>
Vec2<int>::normalizedNonNull () const
{
    Vec2<int> v(*this);
    normalizeOrThrow<int>(v);
    return v;
}


// Vec3<short>

template <> 
short
Vec3<short>::length () const
{
    float lenF = Math<float>::sqrt ((float)dot (*this));
    short lenS = (short) (lenF + 0.5f);
    return lenS;
}

template <>
const Vec3<short> &
Vec3<short>::normalize ()
{
    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
const Vec3<short> &
Vec3<short>::normalizeExc () throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0) && (z == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
const Vec3<short> &
Vec3<short>::normalizeNonNull ()
{
    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
Vec3<short>
Vec3<short>::normalized () const
{
    Vec3<short> v(*this);
    normalizeOrThrow<short>(v);
    return v;
}

template <>
Vec3<short>
Vec3<short>::normalizedExc () const throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0) && (z == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    Vec3<short> v(*this);
    normalizeOrThrow<short>(v);
    return v;
}

template <>
Vec3<short>
Vec3<short>::normalizedNonNull () const
{
    Vec3<short> v(*this);
    normalizeOrThrow<short>(v);
    return v;
}


// Vec3<int>

template <> 
int
Vec3<int>::length () const
{
    float lenF = Math<float>::sqrt ((float)dot (*this));
    int lenI = (int) (lenF + 0.5f);
    return lenI;
}

template <>
const Vec3<int> &
Vec3<int>::normalize ()
{
    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
const Vec3<int> &
Vec3<int>::normalizeExc () throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0) && (z == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
const Vec3<int> &
Vec3<int>::normalizeNonNull ()
{
    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
Vec3<int>
Vec3<int>::normalized () const
{
    Vec3<int> v(*this);
    normalizeOrThrow<int>(v);
    return v;
}

template <>
Vec3<int>
Vec3<int>::normalizedExc () const throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0) && (z == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    Vec3<int> v(*this);
    normalizeOrThrow<int>(v);
    return v;
}

template <>
Vec3<int>
Vec3<int>::normalizedNonNull () const
{
    Vec3<int> v(*this);
    normalizeOrThrow<int>(v);
    return v;
}


// Vec4<short>

template <> 
short
Vec4<short>::length () const
{
    float lenF = Math<float>::sqrt ((float)dot (*this));
    short lenS = (short) (lenF + 0.5f);
    return lenS;
}

template <>
const Vec4<short> &
Vec4<short>::normalize ()
{
    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
const Vec4<short> &
Vec4<short>::normalizeExc () throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0) && (z == 0) && (w == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
const Vec4<short> &
Vec4<short>::normalizeNonNull ()
{
    normalizeOrThrow<short>(*this);
    return *this;
}

template <>
Vec4<short>
Vec4<short>::normalized () const
{
    Vec4<short> v(*this);
    normalizeOrThrow<short>(v);
    return v;
}

template <>
Vec4<short>
Vec4<short>::normalizedExc () const throw (Iex::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 <>
Vec4<short>
Vec4<short>::normalizedNonNull () const
{
    Vec4<short> v(*this);
    normalizeOrThrow<short>(v);
    return v;
}


// Vec4<int>

template <> 
int
Vec4<int>::length () const
{
    float lenF = Math<float>::sqrt ((float)dot (*this));
    int lenI = (int) (lenF + 0.5f);
    return lenI;
}

template <>
const Vec4<int> &
Vec4<int>::normalize ()
{
    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
const Vec4<int> &
Vec4<int>::normalizeExc () throw (Iex::MathExc)
{
    if ((x == 0) && (y == 0) && (z == 0) && (w == 0))
        throw NullVecExc ("Cannot normalize null vector.");

    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
const Vec4<int> &
Vec4<int>::normalizeNonNull ()
{
    normalizeOrThrow<int>(*this);
    return *this;
}

template <>
Vec4<int>
Vec4<int>::normalized () const
{
    Vec4<int> v(*this);
    normalizeOrThrow<int>(v);
    return v;
}

template <>
Vec4<int>
Vec4<int>::normalizedExc () const throw (Iex::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 <>
Vec4<int>
Vec4<int>::normalizedNonNull () const
{
    Vec4<int> v(*this);
    normalizeOrThrow<int>(v);
    return v;
}

} // namespace Imath
Summary ✨

This C++ code defines a set of classes for vector operations, specifically for 2D to 4D vectors with elements of type short and int. It provides functions for normalizing (normalizing to unit length) and throwing exceptions when the input vector is null. The classes are part of the Imath namespace, suggesting they might be used in a mathematical or graphics context.
Alerts (4)

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