nevrax.org : docs

00001 
+00007 /* Copyright, 2001 Nevrax Ltd.
+00008  *
+00009  * This file is part of NEVRAX NEL.
+00010  * NEVRAX NEL is free software; you can redistribute it and/or modify
+00011  * it under the terms of the GNU General Public License as published by
+00012  * the Free Software Foundation; either version 2, or (at your option)
+00013  * any later version.
+00014 
+00015  * NEVRAX NEL is distributed in the hope that it will be useful, but
+00016  * WITHOUT ANY WARRANTY; without even the implied warranty of
+00017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+00018  * General Public License for more details.
+00019 
+00020  * You should have received a copy of the GNU General Public License
+00021  * along with NEVRAX NEL; see the file COPYING. If not, write to the
+00022  * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+00023  * MA 02111-1307, USA.
+00024  */
+00025 
+00026 #include "std3d.h"
+00027 
+00028 #include "3d/vegetable_clip_block.h"
+00029 
+00030 
+00031 namespace NL3D 
+00032 {
+00033 
+00034 
+00035 // ***************************************************************************
+00036 CVegetableClipBlock::CVegetableClipBlock()
+00037 {
+00038         _Empty= true;
+00039         _RenderNext= NULL;
+00040         _NumIgs= 0;
+00041 }
+00042 
+00043 
+00044 // ***************************************************************************
+00045 void                    CVegetableClipBlock::extendBBoxOnly(const CVector &vec)
+00046 {
+00047         if( !_BBox.include(vec) )
+00048         {
+00049                 _BBox.extend(vec);
+00050         }
+00051 }
+00052 
+00053 
+00054 // ***************************************************************************
+00055 void                    CVegetableClipBlock::updateSphere()
+00056 {
+00057         _BSphere.Center= _BBox.getCenter();
+00058         _BSphere.Radius= _BBox.getRadius();
+00059 }
+00060 
+00061 // ***************************************************************************
+00062 void                    CVegetableClipBlock::extendSphere(const CVector &vec)
+00063 {
+00064         if(_Empty)
+00065         {
+00066                 _Empty= false;
+00067                 _BBox.setCenter(vec);
+00068                 _BBox.setHalfSize(CVector::Null);
+00069                 _BSphere.Center= vec;
+00070                 _BSphere.Radius= 0;
+00071         }
+00072         else
+00073         {
+00074                 extendBBoxOnly(vec);
+00075                 updateSphere();
+00076         }
+00077 
+00078 }
+00079 
+00080 
+00081 // ***************************************************************************
+00082 bool                    CVegetableClipBlock::clip(const std::vector<CPlane>     &pyramid)
+00083 {
+00084         if(_Empty) 
+00085                 return false;
+00086 
+00087         for(uint i=0;i<pyramid.size();i++)
+00088         {
+00089                 // If entirely out.
+00090                 if(!_BSphere.clipBack( pyramid[i] ))
+00091                 {
+00092                         return false;
+00093                 }
+00094         }
+00095 
+00096         return true;
+00097 }
+00098 
+00099 
+00100 
+00101 } // NL3D
+
vegetable_clip_block.cpp
