Function IsM44Identity

src/OpenColorIO/MathUtils.cpp:163–188

template<typename T>
bool IsM44Identity(const T * m44)
{
    static_assert(std::is_floating_point<T>::value,
                  "Only single and double precision floats are supported");

    unsigned int index=0;

    for(unsigned int j=0; j<4; ++j)
    {
        for(unsigned int i=0; i<4; ++i)
        {
            index = 4*j+i;

            if(i==j)
            {
                if(!IsScalarEqualToOne(m44[index])) return false;
            }
            else
            {
                if(!IsScalarEqualToZero(m44[index])) return false;
            }
        }
    }

    return true;
}

template bool IsM44Identity(const float * m44);
template bool IsM44Identity(const double * m44);