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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_PATCHDLM_CONTEXT_H
+00027 #define NL_PATCHDLM_CONTEXT_H
+00028 
+00029 #include "nel/misc/types_nl.h"
+00030 #include "nel/misc/object_vector.h"
+00031 #include "3d/tess_list.h"
+00032 #include "nel/misc/bsphere.h"
+00033 #include "nel/misc/aabbox.h"
+00034 #include "nel/misc/rgba.h"
+00035 #include "3d/landscape_def.h"
+00036 
+00037 
+00038 namespace NL3D 
+00039 {
+00040 
+00041 
+00042 class   CPatch;
+00043 class   CTextureDLM;
+00044 class   CPointLight;
+00045 class   CPatchDLMContextList;
+00046 
+00047 // ***************************************************************************
+00055 class CPatchDLMPointLight
+00056 {
+00057 public:
+00058         // Diffuse Color of the Spot, pre-modulated with landscape PointLightDiffuseMaterial. 0..255
+00059         float           R, G, B;
+00060         // Is this a spot? NB: if false, cosMin/cosMax are still well computed for correctLighting (cosMax=-1, cosMin= -2).
+00061         bool            IsSpot;
+00062         // World Position of the spot
+00063         CVector         Pos;
+00064         // Direction of the spot, normalized
+00065         CVector         Dir;
+00066         // cosMax, where influence==1.
+00067         float           CosMax;
+00068         // cosMin, where influence==0. NB: cosMax>cosMin (ie angleMax<angleMin)
+00069         float           CosMin;
+00070         // 1.f / (cosMax-cosMin);
+00071         float           OOCosDelta;
+00072         // Attenuation distance, where influence==0.
+00073         float           AttMax;
+00074         // Attenuation distance, where influence==1. NB: attMax>attMin
+00075         float           AttMin;
+00076         // 1.f / (attMin-attMax);
+00077         float           OOAttDelta;
+00078 
+00079 
+00080         // The estimated sphere which englobe the light. NB: approximated for SpotLight
+00081         NLMISC::CBSphere        BSphere;
+00082         // The BBox which englobe the light. NB: Sphere and Box are best fit to the light, ie bbox may not
+00083         // englobe the sphere and vice versa
+00084         NLMISC::CAABBox         BBox;
+00085 
+00086 
+00087 public:
+00088         // compile from a pointlight. NB: attenuation end is clamped to maxAttEnd (must be >0)
+00089         void            compile(const CPointLight &pl, NLMISC::CRGBA landDiffMat, float maxAttEnd= 30.f);
+00090 };
+00091 
+00092 
+00093 // ***************************************************************************
+00100 class CPatchDLMContext : public CTessNodeList
+00101 {
+00102 public:
+00103 
+00104         struct  CVertex
+00105         {
+00106                 CVector         Pos;
+00107                 CVector         Normal;
+00108         };
+00109 
+00111         enum    TCompileType    {ModulateTileColor=0, ModulateTextureFar, ModulateConstant, NoModulate};
+00112 
+00113 public:
+00114 
+00117         uint                    TextPosX, TextPosY, Width, Height;
+00119         float                   DLMUScale, DLMVScale, DLMUBias, DLMVBias;
+00121         uint8                   MinU8, MaxU8;
+00122         uint8                   MinV8, MaxV8;
+00123 
+00127         uint                    OldPointLightCount;
+00128         uint                    CurPointLightCount;
+00129 
+00130 
+00131 public:
+00132 
+00134         CPatchDLMContext();
+00136         ~CPatchDLMContext();
+00137 
+00143         bool                    generate(CPatch *patch, CTextureDLM *textureDLM, CPatchDLMContextList *ctxList);
+00144 
+00148         void                    clearLighting();
+00149 
+00153         void                    addPointLightInfluence(const CPatchDLMPointLight &pl);
+00154 
+00162         void                    compileLighting(TCompileType compType, NLMISC::CRGBA modulateCte= NLMISC::CRGBA::White);
+00163 
+00164         CPatch                  *getPatch() const {return _Patch;}
+00165 
+00166         // For Bench. Get the size in memory this class use.
+00167         uint                    getMemorySize() const;
+00168 
+00169 // *************************
+00170 private:
+00171 
+00173         CPatch                                                  *_Patch;
+00175         CTextureDLM                                             *_DLMTexture;
+00176         // The ctx list where this context is appened.
+00177         CPatchDLMContextList                    *_DLMContextList;
+00178 
+00180         NLMISC::CObjectVector<CVertex>  _Vertices;
+00181 
+00183         NLMISC::CObjectVector<CRGBA>    _LightMap;
+00184 
+00186         struct  CCluster
+00187         {
+00188                 // The bounding sphere of the cluster
+00189                 NLMISC::CBSphere                        BSphere;
+00190                 // If cluster not clipped, how many cluster to skip. NB: if NSkips==0, then it is a leaf cluster.
+00191                 uint                                            NSkips;
+00192                 // For leaf cluster: logical position of the cluster
+00193                 uint16                                          X, Y;
+00194         };
+00195 
+00197         NLMISC::CObjectVector<CCluster> _Clusters;
+00198 
+00199         // Tells if all _LightMap[] is all black.
+00200         bool                                                    _IsSrcTextureFullBlack;
+00201         // Tells if all dst texture in _DLMTexture is black.
+00202         bool                                                    _IsDstTextureFullBlack;
+00203 
+00204 
+00205 // If resolution of the lightmap is every 2x2 tiles, must bkup tileColors.
+00206 #ifndef NL_DLM_TILE_RES
+00207         // The tileColors at resolution of tessBlock
+00208         NLMISC::CObjectVector<uint16, false>    _LowResTileColors;
+00209 #endif
+00210 
+00211 
+00215         NLMISC::CObjectVector<CRGBA>    _TextureFar;
+00216 
+00217 
+00218 private:
+00219 
+00220         // called at generate.
+00221         void                    computeTextureFar();
+00222 
+00223         // Tile at 2x2 resolution method
+00224         static const CRGBA      *computeTileFarSrcDeltas(sint nRot, bool is256x256, uint8 uvOff, const CRGBA *srcPixel, sint &srcDeltaX, sint &srcDeltaY);
+00225         static void             copyTileToTexture(const CRGBA *srcPixel, sint srcDeltaX, sint srcDeltaY, CRGBA *dstPixel, uint dstStride);
+00226         static void             blendTileToTexture(const CRGBA *srcPixel, sint srcDeltaX, sint srcDeltaY, CRGBA *dstPixel, uint dstStride);
+00227 
+00228 };
+00229 
+00230 
+00231 // ***************************************************************************
+00233 class   CPatchDLMContextList : public CTessList<CPatchDLMContext>
+00234 {
+00235 };
+00236 
+00237 
+00238 
+00239 } // NL3D
+00240 
+00241 
+00242 #endif // NL_PATCHDLM_CONTEXT_H
+00243 
+00244 /* End of patchdlm_context.h */
+