prsky.h Source File

00001 /*
00002     Copyright (C) 2001 by W.C.A. Wijngaards
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public
00015     License along with this library; if not, write to the Free
00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __PROCSKYTEX_H__
00020 #define __PROCSKYTEX_H__
00021 
00022 #include "csgeom/math3d.h"
00023 #include "csgfx/rgbpixel.h"
00024 #include "csutil/cscolor.h"
00025 #include "cstool/proctex.h"
00026 
00027 class csProcSky;
00028 
00032 class csProcSkyTexture : public csProcTexture {
00034   csProcSky *sky;
00036   csProcSkyTexture *next;
00037 
00039   csVector3 txtorig, txtu, txtv;
00041   csVector3 *isect;
00043   bool forcerender;
00044 
00045 public:
00047   csProcSkyTexture(csProcSky *par);
00049   virtual ~csProcSkyTexture();
00050 
00051   void SetNextSky(csProcSkyTexture *n) {next = n;}
00052   csProcSkyTexture *GetNextSky() const {return next;}
00053 
00054   virtual bool PrepareAnim ();
00055 
00057   virtual void Animate (csTicks current_time);
00058 
00060   iGraphics2D* GetG2D() const {return ptG2D;}
00062   iGraphics3D* GetG3D() const {return ptG3D;}
00064   iTextureManager* GetTextureManager() const {return ptTxtMgr;}
00066   int GetWidth() const {return mat_w;}
00068   int GetHeight() const {return mat_h;}
00070   void GetTextureSpace(csVector3& orig, csVector3& u, csVector3& v) const
00071   { orig = txtorig; u = txtu; v = txtv; }
00073   void SetIntersect(csVector3 *icache) {isect = icache;}
00075   csVector3 *GetIntersect() const {return isect;}
00076 
00078   void ForceRerender() {forcerender = true;}
00080   bool MustRender() const {return forcerender;}
00082   void UnsetForceRender() {forcerender = false;}
00084   bool AnimPrepared () {return anim_prepared;}
00094   void SetTextureSpace(const csVector3& tex_orig, const csVector3& total_u,
00095     const csVector3& total_v) {txtorig=tex_orig; txtu=total_u; txtv=total_v;}
00096 };
00097 
00098 
00103 class csProcSky {
00105   csProcSkyTexture *firstsky;
00106 
00108   float radius;
00110   csVector3 center;
00112   csVector3 cam;
00114   csVector3 sunpos;
00116   csColor suncolor;
00118   csRGBcolor maxhaze;
00119 
00121   int nr_octaves;
00123   int octsize;
00125   uint8 *octaves;
00127   uint8** enlarged;
00128 
00129 
00131   bool animated;
00133   int *periods;
00135   int *curposition;
00140   uint8 *startoctaves, *endoctaves;
00142   csTicks old_time;
00144   csVector2 windpos;
00146   csVector2 winddir;
00147 
00149   void Initialize();
00151   void InitOctave(uint8 *octs, int nr);
00153   void SmoothOctave(uint8 *octs, int nr, int smoothpower);
00155   void Enlarge(uint8 *dest, uint8 *src, int factor, int rshift);
00157   void Combine(uint8 *dest, uint8 *start, uint8 *end, int pos, int max, int nr);
00159   void AnimOctave(int nr, int elapsed);
00161   uint8& GetOctave(uint8 *octaves, int oct, int x, int y)
00162   { return octaves [ oct*octsize*octsize + y*octsize + x ]; }
00163   void SetOctave(uint8 *octaves, int oct, int x, int y, uint8 val)
00164   { octaves[ oct*octsize*octsize + y*octsize + x ] = val; }
00166   void CopyOctave(uint8 *srcocts, int srcnr, uint8 *destocts, int destnr);
00167 
00169   bool SphereIntersect(const csVector3& point, csVector3& isect);
00171   csRGBcolor GetSkyBlue(const csVector3& spot, float& haze, float sundist,
00172     bool& below);
00174   uint8 GetCloudVal(int x, int y);
00176   float GetSundist(const csVector3& spot);
00177 
00178 public:
00179   csProcSky();
00180   ~csProcSky();
00181 
00183   void DrawToTexture(csProcSkyTexture *skytex, csTicks current_time);
00184 
00186   void MakeIntersectCache(csProcSkyTexture *skytex);
00187 
00196   void SetAnimated(bool anim=true, csTicks current_time=0);
00198   bool GetAnimated() const {return animated;}
00200   csProcSkyTexture *GetFirstSky() const {return firstsky;}
00202   void SetFirstSky(csProcSkyTexture *s) {firstsky = s;}
00203 };
00204 
00205 #endif // __PROCSKYTEX_H__