--- ray/src/rt/source.h	2008/12/06 01:08:53	2.18
+++ ray/src/rt/source.h	2024/11/15 20:47:42	2.26
@@ -1,4 +1,4 @@
-/* RCSid $Id: source.h,v 2.18 2008/12/06 01:08:53 greg Exp $ */
+/* RCSid $Id: source.h,v 2.26 2024/11/15 20:47:42 greg Exp $ */
 /*
  *  source.h - header file for ray tracing sources.
  *
@@ -19,6 +19,9 @@ extern "C" {
 #ifndef  SHADCACHE
 #define  SHADCACHE	20		/* shadow cache resolution */
 #endif
+#ifndef  MINSHADCNT
+#define  MINSHADCNT	2		/* test at least this many shadows */
+#endif
 
 #define  SDISTANT	01		/* source distant flag */
 #define  SSKIP		02		/* source skip flag */
@@ -69,7 +72,7 @@ typedef struct {
 	} sa;			/* source aiming information */
 	unsigned long
 		ntests, nhits;	/* shadow tests and hits */
-#ifdef  SHADCACHE
+#if  SHADCACHE
 	OBSCACHE  *obscache;    /* obstructor cache */
 #endif
 	int  sflags;		/* source flags */
@@ -142,14 +145,27 @@ extern int  nsources;			/* the number of sources */
 #define  getmaxdisk(c,o)	(*sfun[(o)->otype].of->getdisk)(c,o)
 #define  setsource(s,o)		(*sfun[(o)->otype].of->setsrc)(s,o)
 
+#define  SSKIPFLSIZ		((nsources+7) >> 3)
+
+extern uby8	*ssf_select;		/* sources we may skip */
+
+#define  sskip_new()		((uby8 *)ecalloc(1,SSKIPFLSIZ))
+#define  sskip_free(fl)		(efree(fl), fl=NULL)
+#define  sskip_eq(fl1,fl2)	!memcmp(fl1, fl2, SSKIPFLSIZ)
+#define  sskip_cpy(dfl,sfl)	memcpy(dfl,sfl,SSKIPFLSIZ)
+#define  sskip_op(fl,op,sn)	((fl)[(sn)>>3] op (1<<((sn)&7)))
+#define  sskip_chk(fl,sn)	sskip_op(fl,&,sn)
+#define  sskip_set(fl,sn)	sskip_op(fl,|=,sn)
+#define  sskip_clr(fl,sn)	sskip_op(fl,&=~,sn)
+
 					/* defined in source.c */
-extern OBJREC   *findmaterial(OBJREC *o);
 extern void	marksources(void);
+extern void	distantsources(void);
 extern void	freesources(void);
 extern int	srcray(RAY *sr, RAY *r, SRCINDEX *si);
 extern void	srcvalue(RAY *r);
 extern int	sourcehit(RAY *r);
-typedef void srcdirf_t(COLOR cv, void *np, FVECT ldir, double omega);
+typedef void srcdirf_t(SCOLOR cv, void *np, FVECT ldir, double omega);
 extern void	direct(RAY *r, srcdirf_t *f, void *p);
 extern void	srcscatter(RAY *r);
 extern int	m_light(OBJREC *m, RAY *r);
@@ -160,12 +176,24 @@ extern int      srcblocked(RAY *r);
 extern void     freeobscache(SRCREC *s);
 extern void	markclip(OBJREC *m);
 					/* defined in srcsamp.c */
+extern int	sskip_rsi(uby8 *flags);
+extern uby8	*sskip_flags(int rsi);
+extern void	sskip_addflags(uby8 *dfl, const uby8 *sfl);
+extern int	srcskip(int sn, RAY *r);
 extern double	nextssamp(RAY *r, SRCINDEX *si);
 extern int	skipparts(int ct[3], int sz[3], int pp[2], unsigned char *pt);
 extern void	nopart(SRCINDEX *si, RAY *r);
 extern void	cylpart(SRCINDEX *si, RAY *r);
 extern void	flatpart(SRCINDEX *si, RAY *r);
 extern double	scylform(int sn, FVECT dir);
+					/* defined in srcskipload.c */
+extern int	sskip_dim[2];		/* source skip image size */
+extern int	srcskip_open(char *bmpspec, char *scorrimg);
+extern int	srcskip_getrow(int row, int *sndx, float *scorr);
+extern int	*srcskip_ndxmap(void);
+extern float	*srcskip_corrmap(void);
+extern void	srcskip_close(void);
+extern void	srcskip_free_maps(void);
 					/* defined in srcsupp.c */
 extern void	initstypes(void);
 extern int	newsource(void);