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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_instance_group.h"
00029 
00030 
00031 namespace NL3D 
00032 {
00033 
00034 
00035 // ***************************************************************************
00036 CVegetableInstanceGroup::CVegetableInstanceGroup()
00037 {
00038         _ClipOwner= NULL;
00039         _SortOwner= NULL;
00040         _HasZSortPassInstances= false;
00041         _TriangleQuadrantOrderNumTriangles= 0;
00042         _ULPrec= this;
00043         _ULNext= this;
00044         _ULNumVertices= 0;
00045 }
00046 
00047 
00048 // ***************************************************************************
00049 CVegetableInstanceGroup::~CVegetableInstanceGroup()
00050 {
00051         unlinkUL();
00052 }
00053 
00054 
00055 // ***************************************************************************
00056 void                    CVegetableInstanceGroup::linkBeforeUL(CVegetableInstanceGroup *igNext)
00057 {
00058         nlassert(igNext);
00059 
00060         // first, unlink others from me. NB: works even if _ULPrec==_ULNext==this.
00061         _ULNext->_ULPrec= _ULPrec;
00062         _ULPrec->_ULNext= _ULNext;
00063         // link to igNext.
00064         _ULNext= igNext;
00065         _ULPrec= igNext->_ULPrec;
00066         // link others to me.
00067         _ULNext->_ULPrec= this;
00068         _ULPrec->_ULNext= this;
00069 }
00070 
00071 // ***************************************************************************
00072 void                    CVegetableInstanceGroup::unlinkUL()
00073 {
00074         // unlink others from me. NB: works even if _ULPrec==_ULNext==this.
00075         _ULNext->_ULPrec= _ULPrec;
00076         _ULPrec->_ULNext= _ULNext;
00077         // reset
00078         _ULPrec= this;
00079         _ULNext= this;
00080 }
00081 
00082 
00083 // ***************************************************************************
00084 CVegetableInstanceGroupReserve::CVegetableInstanceGroupReserve()
00085 {
00086 }
00087 
00088 
00089 // ***************************************************************************
00090 bool                    CVegetableInstanceGroup::isEmpty() const
00091 {
00092         for(uint i=0; i<NL3D_VEGETABLE_NRDRPASS; i++)
00093         {
00094                 const CVegetableRdrPass &vegetRdrPass= _RdrPass[i];
00095                 // If some triangles to render, the ig is not empty
00096                 if(vegetRdrPass.NTriangles != 0)
00097                         return false;
00098         }
00099 
00100         // for all pass, no triangles to render => the ig is empty.
00101         return true;
00102 }
00103 
00104 
00105 
00106 } // NL3D
vegetable_instance_group.cpp
