nel/src/misc/line.cpp

   1 // NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
   2 // Copyright (C) 2010  Winch Gate Property Limited
   3 //
   4 // This program is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU Affero General Public License as
   6 // published by the Free Software Foundation, either version 3 of the
   7 // License, or (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 Affero General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU Affero General Public License
  15 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 #include "stdmisc.h"
  18
  19 #include "nel/misc/line.h"
  20
  21 #ifdef DEBUG_NEW
  22         #define new DEBUG_NEW
  23 #endif
  24
  25 namespace NLMISC
  26 {
  27
  28 void CLine::project(const CVector &inV,CVector &outV)
  29 {
  30         CVector seg = V1 - V0;
  31         float n = seg.sqrnorm();
  32         if (n == 0.f)
  33         {
  34                 outV = V0;
  35         }
  36         else
  37         {
  38                 float dp = (inV - V0) * seg;
  39                 outV = V0 + (dp /  n) * seg;
  40         }
  41 }
  42
  43
  44
  45 } // NLMISC