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root/radiance/ray/src/rt/ambient.h
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Comparing ray/src/rt/ambient.h (file contents):
Revision 2.6 by greg, Wed Feb 14 15:18:19 1996 UTC vs.
Revision 2.23 by greg, Thu Jun 19 16:26:55 2014 UTC

# Line 1 | Line 1
1 < /* Copyright (c) 1991 Regents of the University of California */
1 > /* RCSid $Id$ */
2 > /*
3 > * Common definitions for interreflection routines.
4 > *
5 > * Include after ray.h
6 > */
7  
8 < /* SCCSid "$SunId$ LBL" */
8 > #ifndef _RAD_AMBIENT_H_
9 > #define _RAD_AMBIENT_H_
10 > #ifdef __cplusplus
11 > extern "C" {
12 > #endif
13  
14 + #ifndef OLDAMB
15 +
16   /*
17 < * Common definitions for interreflection routines.
17 > * Normal and u-vector directions encoded using dircode.c
18   */
19 + typedef struct ambrec {
20 +        struct ambrec  *next;   /* next in list */
21 +        unsigned long  latick;  /* last accessed tick */
22 +        float  pos[3];          /* position in space */
23 +        int32  ndir;            /* encoded surface normal */
24 +        int32  udir;            /* u-vector direction */
25 +        int  lvl;               /* recursion level of parent ray */
26 +        float  weight;          /* weight of parent ray */
27 +        float  rad[2];          /* anisotropic radii (rad[0] <= rad[1]) */
28 +        COLOR  val;             /* computed ambient value */
29 +        float  gpos[2];         /* (u,v) gradient wrt. position */
30 +        float  gdir[2];         /* (u,v) gradient wrt. direction */
31 +        uint32  corral;         /* potential light leak direction flags */
32 + }  AMBVAL;                      /* ambient value */
33  
34 + typedef struct ambtree {
35 +        AMBVAL  *alist;         /* ambient value list */
36 +        struct ambtree  *kid;   /* 8 child nodes */
37 + }  AMBTREE;                     /* ambient octree */
38 +
39 + extern double  maxarad;         /* maximum ambient radius */
40 + extern double  minarad;         /* minimum ambient radius */
41 +
42 + #ifndef AVGREFL
43 + #define  AVGREFL        0.5     /* assumed average reflectance */
44 + #endif
45 +
46 + #define  AMBVALSIZ      67      /* number of bytes in portable AMBVAL struct */
47 + #define  AMBMAGIC       559     /* magic number for ambient value files */
48 + #define  AMBFMT         "Radiance_ambval"       /* format id string */
49 +
50 +                                        /* defined in ambient.c */
51 + extern void     setambres(int ar);
52 + extern void     setambacc(double newa);
53 + extern void     setambient(void);
54 + extern void     multambient(COLOR aval, RAY *r, FVECT nrm);
55 + extern void     ambdone(void);
56 + extern void     ambnotify(OBJECT obj);
57 + extern int      ambsync(void);
58 +                                        /* defined in ambcomp.c */
59 + extern int      doambient(COLOR acol, RAY *r, double wt,
60 +                                FVECT uv[2], float rad[2],
61 +                                float gpos[2], float gdir[2], uint32 *crlp);
62 +                                        /* defined in ambio.c */
63 + extern void     putambmagic(FILE *fp);
64 + extern int      hasambmagic(FILE *fp);
65 + extern int      writambval(AMBVAL *av, FILE *fp);
66 + extern int      readambval(AMBVAL *av, FILE *fp);
67 + extern int      ambvalOK(AMBVAL *av);
68 +
69 + #else /* ! NEWAMB */
70 +
71   /*
72   * Since we've defined our vectors as float below to save space,
73   * watch out for changes in the definitions of VCOPY() and DOT()
74   * and don't pass these vectors to fvect routines.
75   */
76   typedef struct ambrec {
77 +        struct ambrec  *next;   /* next in list */
78          unsigned long  latick;  /* last accessed tick */
79          float  pos[3];          /* position in space */
80          float  dir[3];          /* normal direction */
81 <        int  lvl;               /* recursion level of parent ray */
81 >        int    lvl;             /* recursion level of parent ray */
82          float  weight;          /* weight of parent ray */
83          float  rad;             /* validity radius */
84          COLOR  val;             /* computed ambient value */
85          float  gpos[3];         /* gradient wrt. position */
86          float  gdir[3];         /* gradient wrt. direction */
24 –        struct ambrec  *next;   /* next in list */
87   }  AMBVAL;                      /* ambient value */
88  
89 < extern COLOR  ambval;           /* global ambient component */
90 < extern int  ambvwt;             /* initial weight for ambient value */
91 < extern double  ambacc;          /* ambient accuracy */
92 < extern int  ambres;             /* ambient resolution */
93 < extern int  ambdiv;             /* number of divisions for calculation */
94 < extern int  ambssamp;           /* number of super-samples */
95 < extern int  ambounce;           /* number of ambient bounces */
96 < extern char  *amblist[];        /* ambient include/exclude list */
97 < extern int  ambincl;            /* include == 1, exclude == 0 */
89 > typedef struct ambtree {
90 >        AMBVAL  *alist;         /* ambient value list */
91 >        struct ambtree  *kid;   /* 8 child nodes */
92 > }  AMBTREE;                     /* ambient octree */
93 >
94 > typedef struct {
95 >        COLOR  v;               /* division sum (partial) */
96 >        float  r;               /* 1/distance sum */
97 >        float  k;               /* variance for this division */
98 >        int    n;               /* number of subsamples */
99 >        unsigned short  t, p;   /* theta, phi indices */
100 > }  AMBSAMP;             /* ambient sample division */
101 >
102 > typedef struct {
103 >        FVECT  ux, uy, uz;      /* x, y and z axis directions */
104 >        COLOR  acoef;           /* division contribution coefficient */
105 >        int    ns;              /* number of super-samples */
106 >        int    nt, np;          /* number of theta and phi directions */
107 > }  AMBHEMI;             /* ambient sample hemisphere */
108 >
109   extern double  maxarad;         /* maximum ambient radius */
110   extern double  minarad;         /* minimum ambient radius */
111  
112 < extern double  sumambient(), doambient(), makeambient();
40 <
112 > #ifndef AVGREFL
113   #define  AVGREFL        0.5     /* assumed average reflectance */
114 + #endif
115  
116   #define  AMBVALSIZ      75      /* number of bytes in portable AMBVAL struct */
117   #define  AMBMAGIC       557     /* magic number for ambient value files */
118   #define  AMBFMT         "Radiance_ambval"       /* format id string */
119 +
120 +                                        /* defined in ambient.c */
121 + extern void     setambres(int ar);
122 + extern void     setambacc(double newa);
123 + extern void     setambient(void);
124 + extern void     multambient(COLOR aval, RAY *r, FVECT nrm);
125 + extern void     ambdone(void);
126 + extern void     ambnotify(OBJECT obj);
127 + extern int      ambsync(void);
128 +                                        /* defined in ambcomp.c */
129 + extern double   doambient(COLOR acol, RAY *r, double wt,
130 +                                        FVECT pg, FVECT dg);
131 + extern void     inithemi(AMBHEMI *hp, COLOR ac, RAY *r, double wt);
132 + extern int      divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r);
133 + extern void     comperrs(AMBSAMP *da, AMBHEMI *hp);
134 + extern void     posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
135 + extern void     dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
136 +                                        /* defined in ambio.c */
137 + extern void     putambmagic(FILE *fp);
138 + extern int      hasambmagic(FILE *fp);
139 + extern int      writambval(AMBVAL *av, FILE *fp);
140 + extern int      ambvalOK(AMBVAL *av);
141 + extern int      readambval(AMBVAL *av, FILE *fp);
142 +
143 + #endif  /* ! NEWAMB */
144 +
145 + #ifdef __cplusplus
146 + }
147 + #endif
148 + #endif /* _RAD_AMBIENT_H_ */
149 +

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