1 /****************************************************************************
4 * This module contains all defines, typedefs, and prototypes for MEDIA.C.
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.
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.
22 *****************************************************************************/
28 /*****************************************************************************
29 * Global preprocessor defines
30 ******************************************************************************/
32 /* Scattering types. */
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
41 /*****************************************************************************
43 ******************************************************************************/
47 /*****************************************************************************
49 ******************************************************************************/
53 /*****************************************************************************
55 ******************************************************************************/
57 void Simulate_Media (IMEDIA
**, RAY
*, INTERSECTION
*, COLOUR
, int );
59 void Init_Media (IMEDIA
*);
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
*);