Vec3r.cpp

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/*************************************************************************
*                                                                       *
* Open Physics Abstraction Layer                                        *
* Copyright (C) 2004-2005                                               *
* Alan Fischer  alan.fischer@gmail.com                                  *
* Andres Reinot  andres@reinot.com                                      *
* Tyler Streeter  tylerstreeter@gmail.com                               *
* Oleksandr Lozitskiy mr.olexander@gmail.com                            *
* All rights reserved.                                                  *
* Web: opal.sourceforge.net                                             *
*                                                                       *
* This library is free software; you can redistribute it and/or         *
* modify it under the terms of EITHER:                                  *
*   (1) 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. The text of the GNU Lesser      *
*       General Public License is included with this library in the     *
*       file license-LGPL.txt.                                          *
*   (2) The BSD-style license that is included with this library in     *
*       the file license-BSD.txt.                                       *
*                                                                       *
* 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 files    *
* license-LGPL.txt and license-BSD.txt for more details.                *
*                                                                       *
*************************************************************************/

// class header
#include "Vec3r.h" 
//#pragma implementation

// system headers
#include <cassert>

namespace opal
{
    Vec3r::Vec3r()
    {
        x = 0;
        y = 0;
        z = 0;
    }

    Vec3r::Vec3r( const Vec3r & src )
    {
        x = src.x;
        y = src.y;
        z = src.z;
    }

    Vec3r::Vec3r( real xx, real yy, real zz )
    {
        x = xx;
        y = yy;
        z = zz;
    }

    Vec3r::Vec3r( const real * data )
    {
        x = data[ 0 ];
        y = data[ 1 ];
        z = data[ 2 ];
    }

    void Vec3r::set( real xx, real yy, real zz )
    {
        x = xx;
        y = yy;
        z = zz;
    }

    void Vec3r::set( real * data )
    {
        x = data[ 0 ];
        y = data[ 1 ];
        z = data[ 2 ];
    }

    real & Vec3r::operator[] ( unsigned int i )
    {
        switch ( i )
        {
            case 0:
            return x;
            case 1:
            return y;
            case 2:
            return z;
            default:
            assert( i < 3 );
            return z;
        }
    }

    const real & Vec3r::operator[] ( unsigned int i ) const
    {
        switch ( i )
        {
            case 0:
            return x;
            case 1:
            return y;
            case 2:
            return z;
            default:
            assert( i < 3 );
            return z;
        }
    }

    real Vec3r::lengthSquared() const
    {
        return dot( *this, *this );
    }

    real Vec3r::length() const
    {
        return sqrt( dot( *this, *this ) );
    }

    void Vec3r::normalize()
    {
        real len = length();
        assert( 0 != len );
        real factor = ( real ) 1.0 / len;
        ( *this ) *= factor;
    }

    Vec3r Vec3r::unit() const
    {
        return ( *this ) / length();
    }

    void Vec3r::operator+=( const Vec3r & v )
    {
        x += v.x;
        y += v.y;
        z += v.z;
    }

    void Vec3r::operator-=( const Vec3r & v )
    {
        x -= v.x;
        y -= v.y;
        z -= v.z;
    }

    void Vec3r::operator*=( const Vec3r & v )
    {
        x *= v.x;
        y *= v.y;
        z *= v.z;
    }

    void Vec3r::operator*=( real scalar )
    {
        x *= scalar;
        y *= scalar;
        z *= scalar;
    }

    void Vec3r::operator/=( real scalar )
    {
        x /= scalar;
        y /= scalar;
        z /= scalar;
    }

    void Vec3r::operator/=( const Vec3r & v )
    {
        x /= v.x;
        y /= v.y;
        z /= v.z;
    }

    bool Vec3r::operator==( const Vec3r & v ) const
    {
        return ( areEqual( x, v.x ) && areEqual( y , v.y ) && areEqual( z , v.z ) );
    }

    void Vec3r::operator=( const Vec3r & v )
    {
        x = v.x;
        y = v.y;
        z = v.z;
    }

    bool Vec3r::operator!=( const Vec3r & v ) const
    {
        return ( !areEqual( x, v.x ) || !areEqual( y , v.y ) || !areEqual( z , v.z ) );
    }
}

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