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root/radiance/ray/src/rt/ambient.h
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Comparing ray/src/rt/ambient.h (file contents):
Revision 2.2 by greg, Mon Jul 13 16:17:48 1992 UTC vs.
Revision 2.20 by greg, Fri Apr 11 22:54:34 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 + typedef struct {
39 +        COLOR  v;               /* division sum (partial) */
40 +        float  r;               /* 1/distance sum */
41 +        float  k;               /* variance for this division */
42 +        int    n;               /* number of subsamples */
43 +        unsigned short  t, p;   /* theta, phi indices */
44 + }  AMBSAMP;             /* ambient sample division */
45 +
46 + typedef struct {
47 +        FVECT  ux, uy, uz;      /* x, y and z axis directions */
48 +        COLOR  acoef;           /* division contribution coefficient */
49 +        int    ns;              /* number of super-samples */
50 +        int    nt, np;          /* number of theta and phi directions */
51 + }  AMBHEMI;             /* ambient sample hemisphere */
52 +
53 + extern double  maxarad;         /* maximum ambient radius */
54 + extern double  minarad;         /* minimum ambient radius */
55 +
56 + #ifndef AVGREFL
57 + #define  AVGREFL        0.5     /* assumed average reflectance */
58 + #endif
59 +
60 + #define  AMBVALSIZ      63      /* number of bytes in portable AMBVAL struct */
61 + #define  AMBMAGIC       558     /* magic number for ambient value files */
62 + #define  AMBFMT         "Radiance_ambval"       /* format id string */
63 +
64 +                                        /* defined in ambient.c */
65 + extern void     setambres(int ar);
66 + extern void     setambacc(double newa);
67 + extern void     setambient(void);
68 + extern void     multambient(COLOR aval, RAY *r, FVECT nrm);
69 + extern void     ambdone(void);
70 + extern void     ambnotify(OBJECT obj);
71 + extern int      ambsync(void);
72 +                                        /* defined in ambcomp.c */
73 + extern int      doambient(COLOR acol, RAY *r, double wt,
74 +                                FVECT uv[2], float rad[2],
75 +                                float gpos[2], float gdir[2]);
76 +                                        /* defined in ambio.c */
77 + extern void     putambmagic(FILE *fp);
78 + extern int      hasambmagic(FILE *fp);
79 + extern int      writambval(AMBVAL *av, FILE *fp);
80 + extern int      readambval(AMBVAL *av, FILE *fp);
81 + extern int      ambvalOK(AMBVAL *av);
82 +
83 + #else /* ! NEWAMB */
84 +
85   /*
86   * Since we've defined our vectors as float below to save space,
87   * watch out for changes in the definitions of VCOPY() and DOT()
88   * and don't pass these vectors to fvect routines.
89   */
90   typedef struct ambrec {
91 +        struct ambrec  *next;   /* next in list */
92 +        unsigned long  latick;  /* last accessed tick */
93          float  pos[3];          /* position in space */
94          float  dir[3];          /* normal direction */
95 <        int  lvl;               /* recursion level of parent ray */
95 >        int    lvl;             /* recursion level of parent ray */
96          float  weight;          /* weight of parent ray */
97          float  rad;             /* validity radius */
98          COLOR  val;             /* computed ambient value */
99          float  gpos[3];         /* gradient wrt. position */
100          float  gdir[3];         /* gradient wrt. direction */
23 –        struct ambrec  *next;   /* next in list */
101   }  AMBVAL;                      /* ambient value */
102  
103 < extern COLOR  ambval;           /* global ambient component */
104 < extern double  ambacc;          /* ambient accuracy */
105 < extern int  ambres;             /* ambient resolution */
106 < extern int  ambdiv;             /* number of divisions for calculation */
107 < extern int  ambssamp;           /* number of super-samples */
108 < extern int  ambounce;           /* number of ambient bounces */
109 < extern char  *amblist[];        /* ambient include/exclude list */
110 < extern int  ambincl;            /* include == 1, exclude == 0 */
103 > typedef struct ambtree {
104 >        AMBVAL  *alist;         /* ambient value list */
105 >        struct ambtree  *kid;   /* 8 child nodes */
106 > }  AMBTREE;                     /* ambient octree */
107 >
108 > typedef struct {
109 >        COLOR  v;               /* division sum (partial) */
110 >        float  r;               /* 1/distance sum */
111 >        float  k;               /* variance for this division */
112 >        int    n;               /* number of subsamples */
113 >        unsigned short  t, p;   /* theta, phi indices */
114 > }  AMBSAMP;             /* ambient sample division */
115 >
116 > typedef struct {
117 >        FVECT  ux, uy, uz;      /* x, y and z axis directions */
118 >        COLOR  acoef;           /* division contribution coefficient */
119 >        int    ns;              /* number of super-samples */
120 >        int    nt, np;          /* number of theta and phi directions */
121 > }  AMBHEMI;             /* ambient sample hemisphere */
122 >
123   extern double  maxarad;         /* maximum ambient radius */
124   extern double  minarad;         /* minimum ambient radius */
125  
126 < extern double  sumambient(), doambient(), makeambient();
38 <
126 > #ifndef AVGREFL
127   #define  AVGREFL        0.5     /* assumed average reflectance */
128 + #endif
129  
130   #define  AMBVALSIZ      75      /* number of bytes in portable AMBVAL struct */
131 + #define  AMBMAGIC       557     /* magic number for ambient value files */
132 + #define  AMBFMT         "Radiance_ambval"       /* format id string */
133 +
134 +                                        /* defined in ambient.c */
135 + extern void     setambres(int ar);
136 + extern void     setambacc(double newa);
137 + extern void     setambient(void);
138 + extern void     multambient(COLOR aval, RAY *r, FVECT nrm);
139 + extern void     ambdone(void);
140 + extern void     ambnotify(OBJECT obj);
141 + extern int      ambsync(void);
142 +                                        /* defined in ambcomp.c */
143 + extern double   doambient(COLOR acol, RAY *r, double wt,
144 +                                        FVECT pg, FVECT dg);
145 + extern void     inithemi(AMBHEMI *hp, COLOR ac, RAY *r, double wt);
146 + extern int      divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r);
147 + extern void     comperrs(AMBSAMP *da, AMBHEMI *hp);
148 + extern void     posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
149 + extern void     dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
150 +                                        /* defined in ambio.c */
151 + extern void     putambmagic(FILE *fp);
152 + extern int      hasambmagic(FILE *fp);
153 + extern int      writambval(AMBVAL *av, FILE *fp);
154 + extern int      ambvalOK(AMBVAL *av);
155 + extern int      readambval(AMBVAL *av, FILE *fp);
156 +
157 + #endif  /* ! NEWAMB */
158 +
159 + #ifdef __cplusplus
160 + }
161 + #endif
162 + #endif /* _RAD_AMBIENT_H_ */
163 +

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