nel/src/3d/vegetable_clip_block.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 "std3d.h"
  18
  19 #include "nel/3d/vegetable_clip_block.h"
  20
  21 #ifdef DEBUG_NEW
  22 #define new DEBUG_NEW
  23 #endif
  24
  25 namespace NL3D
  26 {
  27
  28
  29 // ***************************************************************************
  30 CVegetableClipBlock::CVegetableClipBlock()
  31 {
  32         _Empty= true;
  33         _RenderNext= NULL;
  34         _NumIgs= 0;
  35 }
  36
  37
  38 // ***************************************************************************
  39 void                    CVegetableClipBlock::extendBBoxOnly(const CVector &vec)
  40 {
  41         if( !_BBox.include(vec) )
  42         {
  43                 _BBox.extend(vec);
  44         }
  45 }
  46
  47
  48 // ***************************************************************************
  49 void                    CVegetableClipBlock::updateSphere()
  50 {
  51         _BSphere.Center= _BBox.getCenter();
  52         _BSphere.Radius= _BBox.getRadius();
  53 }
  54
  55 // ***************************************************************************
  56 void                    CVegetableClipBlock::extendSphere(const CVector &vec)
  57 {
  58         if(_Empty)
  59         {
  60                 _Empty= false;
  61                 _BBox.setCenter(vec);
  62                 _BBox.setHalfSize(CVector::Null);
  63                 _BSphere.Center= vec;
  64                 _BSphere.Radius= 0;
  65         }
  66         else
  67         {
  68                 extendBBoxOnly(vec);
  69                 updateSphere();
  70         }
  71
  72 }
  73
  74
  75 // ***************************************************************************
  76 bool                    CVegetableClipBlock::clip(const std::vector<CPlane>     &pyramid)
  77 {
  78         if(_Empty)
  79                 return false;
  80
  81         for(uint i=0;i<pyramid.size();i++)
  82         {
  83                 // If entirely out.
  84                 if(!_BSphere.clipBack( pyramid[i] ))
  85                 {
  86                         return false;
  87                 }
  88         }
  89
  90         return true;
  91 }
  92
  93
  94
  95 } // NL3D