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root/Development/ray/src/rt/ambient.h

Comparing ray/src/rt/ambient.h (file contents):
Revision 2.1 by greg, Tue Nov 12 17:10:27 1991 UTC vs.
Revision 2.17 by greg, Tue Oct 5 18:05:23 2010 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		* Since we've defined our vectors as float below to save space,
#	Line 12 | Line 16
16		* and don't pass these vectors to fvect routines.
17		*/
18		typedef struct ambrec {
19	+	unsigned long  latick;  /* last accessed tick */
20		float  pos[3];          /* position in space */
21		float  dir[3];          /* normal direction */
22	<	int  lvl;               /* recursion level of parent ray */
22	>	int    lvl;             /* recursion level of parent ray */
23		float  weight;          /* weight of parent ray */
24		float  rad;             /* validity radius */
25		COLOR  val;             /* computed ambient value */
#	Line 23 | Line 28 | typedef struct ambrec {
28		struct ambrec  *next;   /* next in list */
29		}  AMBVAL;                      /* ambient value */
30
31	<	extern COLOR  ambval;           /* global ambient component */
32	<	extern double  ambacc;          /* ambient accuracy */
33	<	extern int  ambres;             /* ambient resolution */
34	<	extern int  ambdiv;             /* number of divisions for calculation */
35	<	extern int  ambssamp;           /* number of super-samples */
36	<	extern int  ambounce;           /* number of ambient bounces */
37	<	extern char  *amblist[];        /* ambient include/exclude list */
38	<	extern int  ambincl;            /* include == 1, exclude == 0 */
31	>	typedef struct ambtree {
32	>	AMBVAL  *alist;         /* ambient value list */
33	>	struct ambtree  *kid;   /* 8 child nodes */
34	>	}  AMBTREE;                     /* ambient octree */
35	>
36	>	typedef struct {
37	>	COLOR  v;               /* division sum (partial) */
38	>	float  r;               /* 1/distance sum */
39	>	float  k;               /* variance for this division */
40	>	int    n;               /* number of subsamples */
41	>	unsigned short  t, p;   /* theta, phi indices */
42	>	}  AMBSAMP;             /* ambient sample division */
43	>
44	>	typedef struct {
45	>	FVECT  ux, uy, uz;      /* x, y and z axis directions */
46	>	COLOR  acoef;           /* division contribution coefficient */
47	>	int    ns;              /* number of super-samples */
48	>	int    nt, np;          /* number of theta and phi directions */
49	>	}  AMBHEMI;             /* ambient sample hemisphere */
50	>
51		extern double  maxarad;         /* maximum ambient radius */
52		extern double  minarad;         /* minimum ambient radius */
53
54	<	extern double  sumambient(), doambient(), makeambient();
38	<
54	>	#ifndef AVGREFL
55		#define  AVGREFL        0.5     /* assumed average reflectance */
56	+	#endif
57	+
58	+	#define  AMBVALSIZ      75      /* number of bytes in portable AMBVAL struct */
59	+	#define  AMBMAGIC       557     /* magic number for ambient value files */
60	+	#define  AMBFMT         "Radiance_ambval"       /* format id string */
61	+
62	+	/* defined in ambient.c */
63	+	extern void     setambres(int ar);
64	+	extern void     setambacc(double newa);
65	+	extern void     setambient(void);
66	+	extern void     multambient(COLOR aval, RAY *r, FVECT nrm);
67	+	extern void     ambdone(void);
68	+	extern void     ambnotify(OBJECT obj);
69	+	extern double   sumambient(COLOR acol, RAY *r, FVECT rn, int al,
70	+	AMBTREE *at, FVECT c0, double s);
71	+	extern double   makeambient(COLOR acol, RAY *r, FVECT rn, int al);
72	+	extern void     extambient(COLOR cr, AMBVAL *ap, FVECT pv, FVECT nv);
73	+	extern int      ambsync(void);
74	+	/* defined in ambcomp.c */
75	+	extern double   doambient(COLOR acol, RAY *r, double wt,
76	+	FVECT pg, FVECT dg);
77	+	extern void     inithemi(AMBHEMI *hp, COLOR ac, RAY *r, double wt);
78	+	extern int      divsample(AMBSAMP *dp, AMBHEMI *h, RAY *r);
79	+	extern void     comperrs(AMBSAMP *da, AMBHEMI *hp);
80	+	extern void     posgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
81	+	extern void     dirgradient(FVECT gv, AMBSAMP *da, AMBHEMI *hp);
82	+	/* defined in ambio.c */
83	+	extern void     putambmagic(FILE *fp);
84	+	extern int      hasambmagic(FILE *fp);
85	+	extern int      writambval(AMBVAL *av, FILE *fp);
86	+	extern int      ambvalOK(AMBVAL *av);
87	+	extern int      readambval(AMBVAL *av, FILE *fp);
88	+	/* defined in lookamb.c */
89	+	extern void     lookamb(FILE *fp);
90	+	extern void     writamb(FILE *fp);
91	+
92	+
93	+	#ifdef __cplusplus
94	+	}
95	+	#endif
96	+	#endif /* _RAD_AMBIENT_H_ */
97	+

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