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root/radiance/ray/src/rt/ambient.h
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Comparing ray/src/rt/ambient.h (file contents):
Revision 1.1 by greg, Fri Jun 7 10:03:51 1991 UTC vs.
Revision 2.9 by schorsch, Sat Jun 7 00:54:58 2003 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 1991 Regents of the University of California */
2 <
3 < /* SCCSid "$SunId$ LBL" */
4 <
1 > /* RCSid $Id$ */
2   /*
3   * Common definitions for interreflection routines.
4 + *
5 + * Include after ray.h
6   */
7 + #ifndef _RAD_AMBIENT_H_
8 + #define _RAD_AMBIENT_H_
9 + #ifdef __cplusplus
10 + extern "C" {
11 + #endif
12  
13 +
14 + #include "copyright.h"
15 +
16   /*
17   * Since we've defined our vectors as float below to save space,
18   * watch out for changes in the definitions of VCOPY() and DOT()
19   * and don't pass these vectors to fvect routines.
20   */
21   typedef struct ambrec {
22 +        unsigned long  latick;  /* last accessed tick */
23          float  pos[3];          /* position in space */
24          float  dir[3];          /* normal direction */
25          int  lvl;               /* recursion level of parent ray */
# Line 23 | Line 31 | typedef struct ambrec {
31          struct ambrec  *next;   /* next in list */
32   }  AMBVAL;                      /* ambient value */
33  
34 < extern COLOR  ambval;           /* global ambient component */
35 < extern double  ambacc;          /* ambient accuracy */
36 < extern int  ambres;             /* ambient resolution */
37 < extern int  ambdiv;             /* number of divisions for calculation */
38 < extern int  ambssamp;           /* number of super-samples */
39 < extern int  ambounce;           /* number of ambient bounces */
40 < extern char  *amblist[];        /* ambient include/exclude list */
41 < extern int  ambincl;            /* include == 1, exclude == 0 */
34 > typedef struct ambtree {
35 >        AMBVAL  *alist;         /* ambient value list */
36 >        struct ambtree  *kid;   /* 8 child nodes */
37 > }  AMBTREE;                     /* ambient octree */
38 >
39 > typedef struct {
40 >        short  t, p;            /* theta, phi indices */
41 >        COLOR  v;               /* value sum */
42 >        float  r;               /* 1/distance sum */
43 >        float  k;               /* variance for this division */
44 >        int  n;                 /* number of subsamples */
45 > }  AMBSAMP;             /* ambient sample division */
46 >
47 > typedef struct {
48 >        FVECT  ux, uy, uz;      /* x, y and z axis directions */
49 >        short  nt, np;          /* number of theta and phi directions */
50 > }  AMBHEMI;             /* ambient sample hemisphere */
51 >
52   extern double  maxarad;         /* maximum ambient radius */
53   extern double  minarad;         /* minimum ambient radius */
54  
55 < extern double  sumambient(), doambient(), makeambient();
55 > #define  AVGREFL        0.5     /* assumed average reflectance */
56 >
57 > #define  AMBVALSIZ      75      /* number of bytes in portable AMBVAL struct */
58 > #define  AMBMAGIC       557     /* magic number for ambient value files */
59 > #define  AMBFMT         "Radiance_ambval"       /* format id string */
60 >
61 >                                        /* defined in ambcomp.c */
62 > extern int      divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r);
63 > extern double   doambient(COLOR acol, RAY *r, double wt, FVECT pg, FVECT dg);
64 > extern void     inithemi(AMBHEMI *hp, RAY *r, double wt);
65 > extern void     comperrs(AMBSAMP *da, AMBHEMI *hp);
66 > extern void     posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
67 > extern void     dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
68 >                                        /* defined in ambient.c */
69 > extern void     setambres(int ar);
70 > extern void     setambacc(double newa);
71 > extern void     setambient(void);
72 > extern void     ambdone(void);
73 > extern void     ambnotify(OBJECT obj);
74 > extern void     ambient(COLOR acol, RAY *r, FVECT nrm);
75 > extern double   sumambient(COLOR acol, RAY *r, FVECT rn, int al,
76 >                                AMBTREE *at, FVECT c0, double s);
77 > extern double   makeambient(COLOR acol, RAY *r, FVECT rn, int al);
78 > extern void     extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv);
79 > extern int      ambsync(void);
80 >                                        /* defined in ambio.c */
81 > extern void     putambmagic(FILE *fp);
82 > extern int      hasambmagic(FILE *fp);
83 > extern int      writambval(AMBVAL *av, FILE *fp);
84 > extern int      ambvalOK(AMBVAL *av);
85 > extern int      readambval(AMBVAL *av, FILE *fp);
86 >                                        /* defined in lookamb.c */
87 > extern void     lookamb(FILE *fp);
88 > extern void     writamb(FILE *fp);
89 >
90 >
91 > #ifdef __cplusplus
92 > }
93 > #endif
94 > #endif /* _RAD_AMBIENT_H_ */
95 >

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