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00001 
+00007 /* Copyright, 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_CLOUD_H
+00027 #define NL_CLOUD_H
+00028 
+00029 // ------------------------------------------------------------------------------------------------
+00030 
+00031 #include "3d/camera.h"
+00032 #include "3d/material.h"
+00033 #include "3d/texture.h"
+00034 #include "3d/texture_mem.h"
+00035 #include "3d/vertex_buffer.h"
+00036 #include "nel/misc/smart_ptr.h"
+00037 #include "nel/misc/geom_ext.h"
+00038 
+00039 namespace NL3D
+00040 {
+00041 
+00042 // ------------------------------------------------------------------------------------------------
+00043 class CNoise3d;
+00044 class CCloudScape;
+00045 struct SCloudTexture3D;
+00046 struct SCloudTextureClamp;
+00047 
+00048 // ------------------------------------------------------------------------------------------------
+00049 class CCloud
+00050 {
+00051 public:
+00052 
+00053         CCloud (CCloudScape *pCloudScape);
+00054 
+00055         ~CCloud ();
+00056 
+00057         void init (uint32 nVoxelW, uint32 nVoxelH, uint32 nVoxelD, float rBaseFreq, uint32 nNbOctave);
+00058         void generate (CNoise3d &noise);
+00059         void light ();
+00060         
+00061         void reset (NL3D::CCamera *pViewer);
+00062 
+00063         void anim (double dt, double dt2);
+00064 
+00065         // Debug
+00066         void disp ();
+00067         void dispXYZ (NL3D::CMaterial *pMat = NULL);
+00068         // Debug
+00069 
+00070         // Create the billboard (in the screen at pos (NbW*Width, 0)
+00071         void genBill (NL3D::CCamera *pViewer, uint32 nBillSize=128);
+00072         
+00073         // Display billboard to the screen
+00074         void dispBill (NL3D::CCamera *pViewer);
+00075 
+00076         // Accessors
+00077 
+00078         float getX() { return _Pos.x; }
+00079         float getLastX() { return _LastX; }
+00080         float getY() { return _Pos.y; }
+00081         float getZ() { return _Pos.z; }
+00082 
+00083         float getSizeX() { return _Size.x; }
+00084         float getSizeY() { return _Size.y; }
+00085         float getSizeZ() { return _Size.z; }
+00086 
+00087         void setX(float x) { _Pos.x = x; _LastX = x; }
+00088         void setY(float y) { _Pos.y = y; }
+00089         void setZ(float z) { _Pos.z = z; }
+00090 
+00091         void setSizeX(float x) { _Size.x = x; }
+00092         void setSizeY(float y) { _Size.y = y; }
+00093         void setSizeZ(float z) { _Size.z = z; }
+00094 
+00095         void setTexClamp (SCloudTextureClamp &t) { _CloudTexClamp = &t; }
+00096         void setTex3DTemp (SCloudTexture3D &t) { _CloudTexTmp = &t; }
+00097 
+00098         void setLooping () { _WaitState = 2; }
+00099 
+00100         uint32 getBillSize() { return _BillSize; }
+00101 
+00102         uint32 getMemSize () 
+00103         {
+00104                 return _OldBillSize*_OldBillSize*4 + _BillSize*_BillSize*4;
+00105         }
+00106 
+00107         //uint32 Trans, TransTotal;
+00108         double Time, FuturTime;
+00109 
+00110         NLMISC::CRGBA   CloudDiffuse;
+00111         NLMISC::CRGBA   CloudAmbient;
+00112         uint8                   CloudPower;
+00113         uint8                   CloudDistAtt;
+00114 
+00115         uint8                   LastCloudPower; // Cloud power of the old bill board
+00116 private:
+00117 
+00118         void setMode2D ();
+00119 
+00120         // in ; viewer, center
+00121         // out I,J,K, left,right,top,bottom,near,far
+00122         void calcBill (const NLMISC::CVector &Viewer, const NLMISC::CVector &Center, const NLMISC::CVector &Size,
+00123                                         NLMISC::CVector &I, NLMISC::CVector &J, NLMISC::CVector &K,
+00124                                         float &Left, float &Right, float &Top, float &Bottom, float &Near, float &Far);
+00125         
+00126 private:
+00127 
+00128         uint32 _Width, _Height, _Depth;
+00129         uint32 _NbW, _NbH; // Number of slice in width and height (NbW*NbH = Depth
+00130 
+00131         NLMISC::CVector _Size;
+00132         NLMISC::CVector _Pos;
+00133         float _LastX;
+00134 
+00135         float   _BaseFreq; // 1 -> 1 voxel is 1 noise3d pixel 0.5 -> 2 voxels are 1 noise3d pixel (Lowest octave freq)
+00136         uint32  _NbOctave;
+00137         double  *_UStart, *_VStart, *_WStart; // 1st Lowest octave
+00138 
+00139         CCloudScape                     *_CloudScape;
+00140         SCloudTexture3D         *_CloudTexTmp;          // Temporary cloud texture 3D
+00141         SCloudTextureClamp      *_CloudTexClamp;
+00142 
+00143         // BillBoard
+00144 
+00145         // The billboard is a texture where the cloud is rendered
+00146         uint32                                                                  _BillSize; // ( The texture is always sqare)
+00147         uint8                                                                   *_MemBill;
+00148         NLMISC::CSmartPtr<NL3D::CTextureMem>    _TexBill;
+00149 
+00150         // The last texture
+00151         uint32                                                                  _OldBillSize;
+00152         uint8                                                                   *_MemOldBill;
+00153         NLMISC::CSmartPtr<NL3D::CTextureMem>    _TexOldBill;
+00154 
+00155         uint8 _WaitState;
+00156 
+00157         // Accel for calc bill
+00158         
+00159         NLMISC::CVector _BillViewer, _BillCenter, _BillOldCenter;
+00160 
+00161 private:
+00162 
+00163         NL3D::IDriver *_Driver;
+00164 };
+00165 
+00166 // ------------------------------------------------------------------------------------------------
+00167 
+00168 } // namespace NL3D
+00169 
+00170 #endif // NL_CLOUD_H
+00171 
+
cloud.h
