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00001 
00007 /* Copyright, 2000-2002 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 #ifndef NL_BASE_CLIP_OBS_H
00027 #define NL_BASE_CLIP_OBS_H
00028 
00029 
00030 #include "3d/mot.h"
00031 
00032 
00033 namespace NL3D 
00034 {
00035 
00036 
00037 class   IBaseHrcObs;
00038 class   IBaseRenderObs;
00039 class   IBaseAnimDetailObs;
00040 class   IBaseLoadBalancingObs;
00041 
00042 
00043 // ***************************************************************************
00062 class IBaseClipObs : public IObs
00063 {
00064 public:
00066         IBaseHrcObs             *HrcObs;
00067         IBaseRenderObs  *RenderObs;
00068         IBaseAnimDetailObs              *AnimDetailObs;
00069         IBaseLoadBalancingObs   *LoadBalancingObs;
00070 
00074         bool                    Visible;
00075 
00076         enum TClipReason        {FrustumClip=0, DistMaxClip, countClip};
00077 
00078 public:
00079         
00080 
00082         IBaseClipObs()
00083         {
00084                 HrcObs=NULL;
00085                 RenderObs= NULL;
00086                 Visible=false;
00087                 _IndexInVisibleList= -1;
00088         }
00089         // Dtor: remove me from _VisibleList.
00090         virtual ~IBaseClipObs();
00091 
00093         virtual void    init();
00094 
00095 
00099         virtual bool    clip(IBaseClipObs *caller)=0;
00100 
00101 
00110         virtual void    traverse(IObs *caller) =0;
00111 
00112 
00117         virtual void    forceClip(TClipReason clipReason);
00118 
00119 
00123         virtual bool    isTreeNode() {return false;}
00124 
00125 private:
00126         friend class    CClipTrav;
00127 
00128         // The index of the Observer in the _VisibleList; -1 (default) means not in
00129         sint                    _IndexInVisibleList;
00130 };
00131 
00132 
00133 // ***************************************************************************
00146 class CDefaultClipObs : public IBaseClipObs
00147 {
00148 public:
00149 
00151         virtual bool    clip(IBaseClipObs *caller) {return true;}
00152 
00153 
00155         virtual void    traverse(IObs *caller)
00156         {
00157                 traverseSons();
00158         }
00159 
00160 };
00161 
00162 
00163 } // NL3D
00164 
00165 
00166 #endif // NL_BASE_CLIP_OBS_H
00167 
00168 /* End of base_clip_obs.h */