src/shared/vmap/ShortVector.h

   1 /*
   2  * Copyright (C) 2005-2008 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #ifndef _SHORTVECTOR_H
  20 #define _SHORTVECTOR_H
  21
  22 #include <G3D/Vector3.h>
  23
  24 namespace VMAP
  25 {
  26     /**
  27     Vector with 16 bit fix point values 12.4 bit.
  28     */
  29
  30     class ShortVector
  31     {
  32         private:
  33             short iX;
  34             short iY;
  35             short iZ;
  36
  37             const static short maxvalue = 0x7fff;
  38             const static short minvalue = -0x7fff;
  39             const static int fixpointdiv = 16;
  40             const static short fixpoint_maxvalue = maxvalue / fixpointdiv;
  41             const static short fixpoint_minvalue = minvalue / fixpointdiv;
  42
  43             inline short float2Short(float fv) const
  44             {
  45                 short sv;
  46                 debugAssert((fv <= fixpoint_maxvalue || fv >= 1000000) && (fv >= fixpoint_minvalue || fv <= -1000000));
  47                 if(fv >= fixpoint_maxvalue)
  48                     sv=maxvalue;
  49                 else if(fv <= fixpoint_minvalue)
  50                     sv=minvalue;
  51                 else
  52                     sv = (short) (fv * fixpointdiv + 0.5);
  53                 return(sv);
  54             }
  55             inline float short2Float(short sv) const
  56             {
  57                 float fv;
  58                 if(sv >= maxvalue)
  59                     fv=G3D::inf();
  60                 else if(sv <= minvalue)
  61                     fv=-G3D::inf();
  62                 else
  63                     fv = ((float)sv) / fixpointdiv;
  64                 return fv;
  65             }
  66
  67             inline float getFX() const { return(short2Float(iX)); }
  68             inline float getFY() const { return(short2Float(iY)); }
  69             inline float getFZ() const { return(short2Float(iZ)); }
  70         public:
  71             inline ShortVector() {}
  72             inline ShortVector(const G3D::Vector3& pVector)
  73             {
  74                 iX = float2Short(pVector.x);
  75                 iY = float2Short(pVector.y);
  76                 iZ = float2Short(pVector.z);
  77             }
  78
  79             inline ShortVector(float pX, float pY, float pZ)
  80             {
  81                 iX = float2Short(pX);
  82                 iY = float2Short(pY);
  83                 iZ = float2Short(pZ);
  84             }
  85             inline ShortVector(short pX, short pY, short pZ)
  86             {
  87                 iX = pX;
  88                 iY = pY;
  89                 iZ = pZ;
  90             }
  91             inline ShortVector(const ShortVector& pShortVector)
  92             {
  93                 iX = pShortVector.iX;
  94                 iY = pShortVector.iY;
  95                 iZ = pShortVector.iZ;
  96             }
  97
  98             inline float getX() const { return(iX);        }
  99             inline float getY() const { return(iY);        }
 100             inline float getZ() const { return(iZ);        }
 101
 102             inline G3D::Vector3 getVector3() const  { return(G3D::Vector3(getFX(), getFY(), getFZ())); }
 103
 104             inline ShortVector min(const ShortVector pShortVector)
 105             {
 106                 ShortVector result = pShortVector;
 107                 if(pShortVector.iX > iX) { result.iX = iX; }
 108                 if(pShortVector.iY > iY) { result.iY = iY; }
 109                 if(pShortVector.iZ > iZ) { result.iZ = iZ; }
 110                 return(result);
 111             }
 112
 113             inline ShortVector max(const ShortVector pShortVector)
 114             {
 115                 ShortVector result = pShortVector;
 116                 if(pShortVector.iX < iX) { result.iX = iX; }
 117                 if(pShortVector.iY < iY) { result.iY = iY; }
 118                 if(pShortVector.iZ < iZ) { result.iZ = iZ; }
 119                 return(result);
 120             }
 121
 122             inline bool operator==(const ShortVector& v) const
 123             {
 124                 return (iX == v.iX && iY == v.iY && iZ == v.iZ);
 125             }
 126
 127             inline bool operator!=(const ShortVector& v) const
 128             {
 129                 return !(iX == v.iX && iY == v.iY && iZ == v.iZ);
 130             }
 131
 132     };
 133 }
 134 #endif