root/trunk/src/shared/vmap/ShortVector.h

/* 
 * Copyright (C) 2005-2008 MaNGOS <http://www.mangosproject.org/>
 *
 * Copyright (C) 2008 Trinity <http://www.trinitycore.org/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef _SHORTVECTOR_H
#define _SHORTVECTOR_H

#include <G3D/Vector3.h>

namespace VMAP
{
    /**
    Vector with 16 bit fix point values 12.4 bit.
    */

    class ShortVector
    {
        private:
            short iX;
            short iY;
            short iZ;

            const static short maxvalue = 0x7fff;
            const static short minvalue = -0x7fff;
            const static int fixpointdiv = 16;
            const static short fixpoint_maxvalue = maxvalue / fixpointdiv;
            const static short fixpoint_minvalue = minvalue / fixpointdiv;

            inline short float2Short(float fv) const
            {
                short sv;
                debugAssert((fv <= fixpoint_maxvalue || fv >= 1000000) && (fv >= fixpoint_minvalue || fv <= -1000000));
                if(fv >= fixpoint_maxvalue)
                    sv=maxvalue;
                else if(fv <= fixpoint_minvalue)
                    sv=minvalue;
                else
                    sv = (short) (fv * fixpointdiv + 0.5);
                return(sv);
            }
            inline float short2Float(short sv) const
            {
                float fv;
                if(sv >= maxvalue)
                    fv=G3D::inf();
                else if(sv <= minvalue)
                    fv=-G3D::inf();
                else
                    fv = ((float)sv) / fixpointdiv;
                return fv;
            }

            inline float getFX() const { return(short2Float(iX)); }
            inline float getFY() const { return(short2Float(iY)); }
            inline float getFZ() const { return(short2Float(iZ)); }
        public:
            inline ShortVector() {}
            inline ShortVector(const G3D::Vector3& pVector)
            {
                iX = float2Short(pVector.x);
                iY = float2Short(pVector.y);
                iZ = float2Short(pVector.z);
            }

            inline ShortVector(float pX, float pY, float pZ)
            {
                iX = float2Short(pX);
                iY = float2Short(pY);
                iZ = float2Short(pZ);
            }
            inline ShortVector(short pX, short pY, short pZ)
            {
                iX = pX;
                iY = pY;
                iZ = pZ;
            }
            inline ShortVector(const ShortVector& pShortVector)
            {
                iX = pShortVector.iX;
                iY = pShortVector.iY;
                iZ = pShortVector.iZ;
            }

            inline float getX() const { return(iX);        }
            inline float getY() const { return(iY);        }
            inline float getZ() const { return(iZ);        }

            inline G3D::Vector3 getVector3() const  { return(G3D::Vector3(getFX(), getFY(), getFZ())); }

            inline ShortVector min(const ShortVector pShortVector)
            {
                ShortVector result = pShortVector;
                if(pShortVector.iX > iX) { result.iX = iX; }
                if(pShortVector.iY > iY) { result.iY = iY; }
                if(pShortVector.iZ > iZ) { result.iZ = iZ; }
                return(result);
            }

            inline ShortVector max(const ShortVector pShortVector)
            {
                ShortVector result = pShortVector;
                if(pShortVector.iX < iX) { result.iX = iX; }
                if(pShortVector.iY < iY) { result.iY = iY; }
                if(pShortVector.iZ < iZ) { result.iZ = iZ; }
                return(result);
            }

            inline bool operator==(const ShortVector& v) const
            {
                return (iX == v.iX && iY == v.iY && iZ == v.iZ);
            }

            inline bool operator!=(const ShortVector& v) const
            {
                return !(iX == v.iX && iY == v.iY && iZ == v.iZ);
            }

    };
}
#endif