gfx/povray/media.h

   1 /****************************************************************************
   2 *                   media.h
   3 *
   4 *  This module contains all defines, typedefs, and prototypes for MEDIA.C.
   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
  25 #ifndef MEDIA_H
  26 #define MEDIA_H
  27
  28 /*****************************************************************************
  29 * Global preprocessor defines
  30 ******************************************************************************/
  31
  32 /* Scattering types. */
  33
  34 #define ISOTROPIC_SCATTERING            1
  35 #define MIE_HAZY_SCATTERING             2
  36 #define MIE_MURKY_SCATTERING            3
  37 #define RAYLEIGH_SCATTERING             4
  38 #define HENYEY_GREENSTEIN_SCATTERING    5
  39 #define SCATTERING_TYPES                5
  40
  41 /*****************************************************************************
  42 * Global typedefs
  43 ******************************************************************************/
  44
  45
  46
  47 /*****************************************************************************
  48 * Global variables
  49 ******************************************************************************/
  50
  51
  52
  53 /*****************************************************************************
  54 * Global functions
  55 ******************************************************************************/
  56
  57 void Simulate_Media (IMEDIA **, RAY *, INTERSECTION *, COLOUR , int );
  58
  59 void Init_Media (IMEDIA *);
  60
  61 IMEDIA *Create_Media (void);
  62 IMEDIA *Copy_Media (IMEDIA *);
  63 void Destroy_Media (IMEDIA *);
  64 void Transform_Media (IMEDIA *IMedia, TRANSFORM *Trans);
  65 void Transform_Density (PIGMENT *Density, TRANSFORM *Trans);
  66 void Post_Media (IMEDIA *);
  67
  68 #endif