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root/radiance/ray/src/rt/ambient.h
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Comparing ray/src/rt/ambient.h (file contents):
Revision 2.5 by greg, Thu Apr 27 14:12:09 1995 UTC vs.
Revision 2.21 by greg, Sat Apr 19 02:39:44 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 + #ifdef NEWAMB
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 + }  AMBVAL;                      /* ambient value */
32  
33 + typedef struct ambtree {
34 +        AMBVAL  *alist;         /* ambient value list */
35 +        struct ambtree  *kid;   /* 8 child nodes */
36 + }  AMBTREE;                     /* ambient octree */
37 +
38 + extern double  maxarad;         /* maximum ambient radius */
39 + extern double  minarad;         /* minimum ambient radius */
40 +
41 + #ifndef AVGREFL
42 + #define  AVGREFL        0.5     /* assumed average reflectance */
43 + #endif
44 +
45 + #define  AMBVALSIZ      63      /* number of bytes in portable AMBVAL struct */
46 + #define  AMBMAGIC       558     /* magic number for ambient value files */
47 + #define  AMBFMT         "Radiance_ambval"       /* format id string */
48 +
49 +                                        /* defined in ambient.c */
50 + extern void     setambres(int ar);
51 + extern void     setambacc(double newa);
52 + extern void     setambient(void);
53 + extern void     multambient(COLOR aval, RAY *r, FVECT nrm);
54 + extern void     ambdone(void);
55 + extern void     ambnotify(OBJECT obj);
56 + extern int      ambsync(void);
57 +                                        /* defined in ambcomp.c */
58 + extern int      doambient(COLOR acol, RAY *r, double wt,
59 +                                FVECT uv[2], float rad[2],
60 +                                float gpos[2], float gdir[2]);
61 +                                        /* defined in ambio.c */
62 + extern void     putambmagic(FILE *fp);
63 + extern int      hasambmagic(FILE *fp);
64 + extern int      writambval(AMBVAL *av, FILE *fp);
65 + extern int      readambval(AMBVAL *av, FILE *fp);
66 + extern int      ambvalOK(AMBVAL *av);
67 +
68 + #else /* ! NEWAMB */
69 +
70   /*
71   * Since we've defined our vectors as float below to save space,
72   * watch out for changes in the definitions of VCOPY() and DOT()
73   * and don't pass these vectors to fvect routines.
74   */
75   typedef struct ambrec {
76 +        struct ambrec  *next;   /* next in list */
77          unsigned long  latick;  /* last accessed tick */
78          float  pos[3];          /* position in space */
79          float  dir[3];          /* normal direction */
80 <        int  lvl;               /* recursion level of parent ray */
80 >        int    lvl;             /* recursion level of parent ray */
81          float  weight;          /* weight of parent ray */
82          float  rad;             /* validity radius */
83          COLOR  val;             /* computed ambient value */
84          float  gpos[3];         /* gradient wrt. position */
85          float  gdir[3];         /* gradient wrt. direction */
24 –        struct ambrec  *next;   /* next in list */
86   }  AMBVAL;                      /* ambient value */
87  
88 < extern COLOR  ambval;           /* global ambient component */
89 < extern double  ambacc;          /* ambient accuracy */
90 < extern int  ambres;             /* ambient resolution */
91 < extern int  ambdiv;             /* number of divisions for calculation */
92 < extern int  ambssamp;           /* number of super-samples */
93 < extern int  ambounce;           /* number of ambient bounces */
94 < extern char  *amblist[];        /* ambient include/exclude list */
95 < extern int  ambincl;            /* include == 1, exclude == 0 */
88 > typedef struct ambtree {
89 >        AMBVAL  *alist;         /* ambient value list */
90 >        struct ambtree  *kid;   /* 8 child nodes */
91 > }  AMBTREE;                     /* ambient octree */
92 >
93 > typedef struct {
94 >        COLOR  v;               /* division sum (partial) */
95 >        float  r;               /* 1/distance sum */
96 >        float  k;               /* variance for this division */
97 >        int    n;               /* number of subsamples */
98 >        unsigned short  t, p;   /* theta, phi indices */
99 > }  AMBSAMP;             /* ambient sample division */
100 >
101 > typedef struct {
102 >        FVECT  ux, uy, uz;      /* x, y and z axis directions */
103 >        COLOR  acoef;           /* division contribution coefficient */
104 >        int    ns;              /* number of super-samples */
105 >        int    nt, np;          /* number of theta and phi directions */
106 > }  AMBHEMI;             /* ambient sample hemisphere */
107 >
108   extern double  maxarad;         /* maximum ambient radius */
109   extern double  minarad;         /* minimum ambient radius */
110  
111 < extern double  sumambient(), doambient(), makeambient();
39 <
111 > #ifndef AVGREFL
112   #define  AVGREFL        0.5     /* assumed average reflectance */
113 + #endif
114  
115   #define  AMBVALSIZ      75      /* number of bytes in portable AMBVAL struct */
116   #define  AMBMAGIC       557     /* magic number for ambient value files */
117   #define  AMBFMT         "Radiance_ambval"       /* format id string */
118 +
119 +                                        /* defined in ambient.c */
120 + extern void     setambres(int ar);
121 + extern void     setambacc(double newa);
122 + extern void     setambient(void);
123 + extern void     multambient(COLOR aval, RAY *r, FVECT nrm);
124 + extern void     ambdone(void);
125 + extern void     ambnotify(OBJECT obj);
126 + extern int      ambsync(void);
127 +                                        /* defined in ambcomp.c */
128 + extern double   doambient(COLOR acol, RAY *r, double wt,
129 +                                        FVECT pg, FVECT dg);
130 + extern void     inithemi(AMBHEMI *hp, COLOR ac, RAY *r, double wt);
131 + extern int      divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r);
132 + extern void     comperrs(AMBSAMP *da, AMBHEMI *hp);
133 + extern void     posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
134 + extern void     dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
135 +                                        /* defined in ambio.c */
136 + extern void     putambmagic(FILE *fp);
137 + extern int      hasambmagic(FILE *fp);
138 + extern int      writambval(AMBVAL *av, FILE *fp);
139 + extern int      ambvalOK(AMBVAL *av);
140 + extern int      readambval(AMBVAL *av, FILE *fp);
141 +
142 + #endif  /* ! NEWAMB */
143 +
144 + #ifdef __cplusplus
145 + }
146 + #endif
147 + #endif /* _RAD_AMBIENT_H_ */
148 +

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