src/rt/source.h

/* Copyright (c) 1986 Regents of the University of California */

/* SCCSid "$SunId$ LBL" */

/*
 *  source.h - header file for ray tracing sources.
 *
 *     8/20/85
 */

#define  AIMREQT        100             /* required aim success/failure */

#define  SDISTANT       01              /* source distant flag */
#define  SSKIP          02              /* source skip flag */
#define  SPROX          04              /* source proximity flag */
#define  SSPOT          010             /* source spotlight flag */
#define  SVIRTUAL       020             /* source virtual flag */
#define  SFLAT          040             /* source flat flag */
#define  SFOLLOW        0100            /* source follow path flag */

typedef struct {
        FVECT  aim;             /* aim direction or center */
        float  siz;             /* output solid angle or area */
        float  flen;            /* focal length */
} SPOT;                 /* spotlight */

typedef struct {
        int  sflags;            /* source flags */
        FVECT  sloc;            /* direction or position of source */
        FVECT  snorm;           /* surface normal of flat source */
        float  ss;              /* tangent or disk radius */
        float  ss2;             /* domega or projected area */
        struct {
                float  prox;            /* proximity */
                SPOT  *s;               /* spot */
        } sl;                   /* localized source information */
        union {
                int  success;           /* successes - AIMREQT*failures */
                int  svnext;            /* next source to aim for */
        } sa;                   /* source aiming information */
        long  ntests, nhits;    /* shadow tests and hits */
        OBJREC  *so;            /* source destination object */
}  SRCREC;              /* light source */

typedef struct {
        FVECT  dir;             /* source direction */
        COLOR  coef;            /* material coefficient */
        COLOR  val;             /* contribution */
}  CONTRIB;             /* direct contribution */

typedef struct {
        int  sno;               /* source number */
        float  brt;             /* brightness (for comparison) */
}  CNTPTR;              /* contribution pointer */

extern SRCREC  *source;                 /* our source list */
extern int  nsources;                   /* the number of sources */

extern double  srcray();                /* ray to source */

extern SPOT  *makespot();               /* make spotlight */

extern SRCREC  *newsource();            /* allocate new source */
Revision:	1.7
Committed:	Thu Jun 20 09:03:21 1991 UTC (34 years, 4 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.6:	+1 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1986 Regents of the University of California */
2
3			/* SCCSid "$SunId$ LBL" */
4
5			/*
6			* source.h - header file for ray tracing sources.
7			*
8			* 8/20/85
9			*/
10
11	greg	1.6	#define AIMREQT 100 /* required aim success/failure */
12
13	greg	1.1	#define SDISTANT 01 /* source distant flag */
14			#define SSKIP 02 /* source skip flag */
15	greg	1.3	#define SPROX 04 /* source proximity flag */
16			#define SSPOT 010 /* source spotlight flag */
17	greg	1.6	#define SVIRTUAL 020 /* source virtual flag */
18			#define SFLAT 040 /* source flat flag */
19			#define SFOLLOW 0100 /* source follow path flag */
20	greg	1.1
21			typedef struct {
22	greg	1.6	FVECT aim; /* aim direction or center */
23			float siz; /* output solid angle or area */
24	greg	1.3	float flen; /* focal length */
25			} SPOT; /* spotlight */
26
27			typedef struct {
28	greg	1.6	int sflags; /* source flags */
29	greg	1.1	FVECT sloc; /* direction or position of source */
30	greg	1.6	FVECT snorm; /* surface normal of flat source */
31	greg	1.1	float ss; /* tangent or disk radius */
32			float ss2; /* domega or projected area */
33	greg	1.6	struct {
34	greg	1.3	float prox; /* proximity */
35			SPOT s; / spot */
36			} sl; /* localized source information */
37	greg	1.6	union {
38			int success; /* successes - AIMREQTfailures /
39			int svnext; /* next source to aim for */
40			} sa; /* source aiming information */
41	greg	1.2	long ntests, nhits; /* shadow tests and hits */
42	greg	1.6	OBJREC so; / source destination object */
43	greg	1.2	} SRCREC; /* light source */
44	greg	1.1
45	greg	1.2	typedef struct {
46			FVECT dir; /* source direction */
47	greg	1.7	COLOR coef; /* material coefficient */
48	greg	1.2	COLOR val; /* contribution */
49			} CONTRIB; /* direct contribution */
50	greg	1.4
51			typedef struct {
52			int sno; /* source number */
53			float brt; /* brightness (for comparison) */
54			} CNTPTR; /* contribution pointer */
55	greg	1.1
56	greg	1.2	extern SRCREC source; / our source list */
57	greg	1.1	extern int nsources; /* the number of sources */
58
59	greg	1.2	extern double srcray(); /* ray to source */
60	greg	1.3
61			extern SPOT makespot(); / make spotlight */
62	greg	1.6
63			extern SRCREC newsource(); / allocate new source */