gfx/povray/texture.h

   1 /****************************************************************************
   2 *                   texture.h
   3 *
   4 *  This file contains defines and variables for the txt*.c files
   5 *
   6 *  from Persistence of Vision(tm) Ray Tracer
   7 *  Copyright 1996,1999 Persistence of Vision Team
   8 *---------------------------------------------------------------------------
   9 *  NOTICE: This source code file is provided so that users may experiment
  10 *  with enhancements to POV-Ray and to port the software to platforms other
  11 *  than those supported by the POV-Ray Team.  There are strict rules under
  12 *  which you are permitted to use this file.  The rules are in the file
  13 *  named POVLEGAL.DOC which should be distributed with this file.
  14 *  If POVLEGAL.DOC is not available or for more info please contact the POV-Ray
  15 *  Team Coordinator by email to team-coord@povray.org or visit us on the web at
  16 *  http://www.povray.org. The latest version of POV-Ray may be found at this site.
  17 *
  18 * This program is based on the popular DKB raytracer version 2.12.
  19 * DKBTrace was originally written by David K. Buck.
  20 * DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
  21 *
  22 *****************************************************************************/
  23
  24 /* NOTE: FRAME.H contains other texture stuff. */
  25
  26 #ifndef TEXTURE_H
  27 #define TEXTURE_H
  28
  29 #include "pattern.h"
  30 #include "warps.h"
  31
  32 /*****************************************************************************
  33 * Global preprocessor defines
  34 ******************************************************************************/
  35
  36 #define RNDMASK       0x7FFF
  37 #define RNDMULTIPLIER ((DBL)0.000030518509476)
  38
  39 /*
  40  * Macro to create random number in the [0; 1] range.
  41  */
  42
  43 #define FRAND() ((DBL)POV_RAND()*RNDMULTIPLIER)
  44
  45 #define FLOOR(x)  ((x) >= 0.0 ? floor(x) : (0.0 - floor(0.0 - (x)) - 1.0))
  46
  47 #define Hash3d(a,b,c) \
  48   hashTable[(int)(hashTable[(int)(hashTable[(int)((a) & 0xfffL)] ^ ((b) & 0xfffL))] ^ ((c) & 0xfffL))]
  49
  50 #define Hash2d(a,b)   \
  51   hashTable[(int)(hashTable[(int)((a) & 0xfffL)] ^ ((b) & 0xfffL))]
  52
  53 #define Hash1d(a,b)   \
  54   hashTable[(int)(a) ^ ((b) & 0xfffL)]
  55
  56 #define INCRSUM(m,s,x,y,z)  \
  57   ((s)*(RTable[m]*0.5 + RTable[m+1]*(x) + RTable[m+2]*(y) + RTable[m+3]*(z)))
  58
  59 #define INCRSUMP(mp,s,x,y,z) \
  60   ((s)*((mp[0])*0.5 + (mp[1])*(x) + (mp[2])*(y) + (mp[3])*(z)))
  61
  62
  63 /*****************************************************************************
  64 * Global typedefs
  65 ******************************************************************************/
  66
  67
  68
  69 /*****************************************************************************
  70 * Global variables
  71 ******************************************************************************/
  72
  73 extern short *hashTable;
  74 extern DBL *frequency;               /* dmf */
  75 extern unsigned int Number_Of_Waves; /* dmf */
  76 extern VECTOR *Wave_Sources;         /* dmf */
  77
  78
  79
  80 /*****************************************************************************
  81 * Global functions
  82 ******************************************************************************/
  83
  84 void Compute_Colour (COLOUR Colour,PIGMENT *Pigment, DBL value);
  85 void Initialize_Noise (void);
  86 void Free_Noise_Tables (void);
  87 DBL Noise (VECTOR EPoint);
  88 void DNoise (VECTOR result, VECTOR EPoint);
  89 DBL Turbulence (VECTOR EPoint, TURB *Turb);
  90 void DTurbulence (VECTOR result, VECTOR EPoint, TURB *Turb);
  91 DBL cycloidal (DBL value);
  92 DBL Triangle_Wave (DBL value);
  93 void Transform_Textures (TEXTURE *Textures, TRANSFORM *Trans);
  94 void Destroy_Textures (TEXTURE *Textures);
  95 void Post_Textures (TEXTURE *Textures);
  96 FINISH *Create_Finish (void);
  97 FINISH *Copy_Finish (FINISH *Old);
  98 TEXTURE *Create_PNF_Texture (void);
  99 TEXTURE *Copy_Texture_Pointer (TEXTURE *Texture);
 100 TEXTURE *Copy_Textures (TEXTURE *Textures);
 101 TEXTURE *Create_Texture (void);
 102 int Test_Opacity (TEXTURE *Texture);
 103 TURB *Create_Turb (void);
 104 int POV_RAND (void);
 105 void POV_SRAND (int seed);
 106 int POV_GET_OLD_RAND(void);
 107
 108
 109 #endif