VecMath.h

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/*
 * Expression Template Matrix Library
 *
 * Copyright (C) 2004 - 2006 Ricky Lung <mtlung@users.sourceforge.net>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */


#ifdef _MSC_VER
#   pragma once
#   pragma warning( push )
#   pragma warning( disable : 4127 4786 )
#endif  // _MSC_VER

#ifndef EXMAT_MATH_VECMATH_H
#define EXMAT_MATH_VECMATH_H

#include "../View/View.h"
#include "Utility.h"

#if EXMAT_ENABLE_SIMD
//# include "SIMD/SIMDVecMath.h"
#endif  // EXMAT_ENABLE_SIMD


namespace exmat {


template<class L, class R, class ErrChk1, class ErrChk2> EXMAT_INLINE2 static
typename TypeTraits<typename L::value_type, typename R::value_type>::HigherValue
dot(const Vec<L,ErrChk1>& lv, const Vec<R,ErrChk2>& rv) {
    // Compiler should be able to eliminate the if/else statements
    if(L::ROWS == 1) {
        if(R::ROWS == 1)
            return (lv * trans(rv)).getAt(0);           // RowVec, RowVec
        else
            return (lv * rv).getAt(0);                  // RowVec, ColVec
    } else {
        if(R::ROWS == 1)
            return (trans(lv) * trans(rv)).getAt(0);    // ColVec, RowVec
        else
            return (trans(lv) * rv).getAt(0);           // ColVec, ColVec
    }
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static typename Rep::value_type
norm(const Vec<Rep,ErrChk>& v) {
    typedef typename Rep::value_type value_type;
    value_type tmp = dot(v, v);
    return value_type(Math::sqrt(tmp));
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static typename Rep::value_type
norm2(const Vec<Rep,ErrChk>& v) {
    return dot(v, v);
}

// This function assumes a 3D column vector as it's output
template<class L, class R, class LErrChk, class RErrChk> EXMAT_INLINE2 static
const Vec<DenseColVecCon<typename TypeTraits<typename L::value_type, typename R::value_type>::HigherValue, 3>,
    typename ResultantChecker<LErrChk,RErrChk>::RET>
cross(const Vec<L,LErrChk>& A, const Vec<R,RErrChk>& B) {
    typedef Vec<DenseColVecCon<TTYPENAME TypeTraits<TTYPENAME L::value_type, TTYPENAME R::value_type>::HigherValue, 3>,
        TTYPENAME ResultantChecker<LErrChk,RErrChk>::RET> RETType;
    RETType tmp;
    tmp.setAt(0) = A.getAt(1) * B.getAt(2) - A.getAt(2) * B.getAt(1);
    tmp.setAt(1) = A.getAt(2) * B.getAt(0) - A.getAt(0) * B.getAt(2);
    tmp.setAt(2) = A.getAt(0) * B.getAt(1) - A.getAt(1) * B.getAt(0);
    return tmp;
}




namespace Math {

template<class Rep, class ErrChk>
EXMAT_INLINE2 static typename Rep::value_type min(Mat<Rep,ErrChk>& m) {
    return ::exmat::Math::min(m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static typename Rep::value_type max(Mat<Rep,ErrChk>& m) {
    return ::exmat::Math::max(m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static typename Rep::value_type sum(Mat<Rep,ErrChk>& m) {
    return ::exmat::Math::sum(m.getRawData(), m.size());
}
template<class Rep, class ErrChk>
EXMAT_INLINE2 static void rcp(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::rcp(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void sqrt(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::sqrt(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void rsqrt(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::rsqrt(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void exp(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::exp(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void log(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::log(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void sin(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::sin(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void cos(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::cos(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void tan(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::tan(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void asin(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::asin(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void acos(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::acos(m.getRawData(), m.getRawData(), m.size());
}

template<class Rep, class ErrChk>
EXMAT_INLINE2 static void atan(Mat<Rep,ErrChk>& m) {
    ::exmat::Math::atan(m.getRawData(), m.getRawData(), m.size());
}

}   // namespace Math


    // end of groupMathFun


// Include the specialized math functions for the SIMD container type
#if EXMAT_ENABLE_SIMD
//  #include "SIMD/SIMDMathSpecialization.h"
#endif  // EXMAT_ENABLE_SIMD


}   // namespace exmat

#ifdef _MSC_VER
#   pragma warning( pop )
#endif  // _MSC_VER

#endif  // EXMAT_MATH_VECMATH_H

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