--- ray/src/rt/source.h	2003/12/31 01:50:02	2.12
+++ ray/src/rt/source.h	2025/10/22 16:39:58	2.28
@@ -1,4 +1,4 @@
-/* RCSid $Id: source.h,v 2.12 2003/12/31 01:50:02 greg Exp $ */
+/* RCSid $Id: source.h,v 2.28 2025/10/22 16:39:58 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 */
@@ -26,8 +29,9 @@ extern "C" {
 #define  SSPOT		010		/* source spotlight flag */
 #define  SVIRTUAL	020		/* source virtual flag */
 #define  SFLAT		040		/* source flat flag */
-#define  SCYL		0100		/* source cylindrical flag */
-#define  SFOLLOW	0200		/* source follow path flag */
+#define  SCIR		0100		/* source circular flag */
+#define  SCYL		0200		/* source cylindrical flag */
+#define  SFOLLOW	0400		/* source follow path flag */
 
 typedef struct {
 	FVECT  aim;		/* aim direction or center */
@@ -50,7 +54,6 @@ typedef struct {
 }  OBSCACHE;		/* obstructor cache */
 
 typedef struct {
-	int  sflags;		/* source flags */
 	FVECT  sloc;		/* direction or position of source */
 	FVECT  ss[3];		/* source dimension vectors, U, V, and W */
 	float  srad;		/* maximum source radius */
@@ -69,9 +72,10 @@ 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 */
 }  SRCREC;		/* light source */
 
 #define MAXSPART	64		/* maximum partitions per source */
@@ -84,10 +88,10 @@ typedef struct {
 #define snorm		ss[SW]		/* normal vector for flat source */
 
 typedef struct {
+	double  dom;				/* solid angle of partition */
 	int  sn;				/* source number */
 	short  np;				/* number of partitions */
 	short  sp;				/* this partition number */
-	double  dom;				/* solid angle of partition */
 	unsigned char  spt[MAXSPART/2];		/* source partitioning */
 }  SRCINDEX;		/* source index structure */
 
@@ -113,16 +117,16 @@ typedef struct {
  *				i passed to vproj runs from 0 to nproj-1.
  */
 
-typedef struct {
-	int  (*vproj)();	/* project virtual sources */
+typedef struct {		/* project virtual sources */
+	int  (*vproj)(MAT4,OBJREC*,SRCREC*,int);
 	int  nproj;		/* number of possible projections */
 } VSMATERIAL;		/* virtual source material functions */
 
 typedef struct {
-	void	(*setsrc)();	/* set light source for object */
-	void	(*partit)();	/* partition light source object */
-	double  (*getpleq)();	/* plane equation for surface */
-	double  (*getdisk)();	/* maximum disk for surface */
+	void	(*setsrc)(SRCREC*,OBJREC*);	/* set light source for object */
+	void	(*partit)(SRCINDEX*,RAY*);	/* partition light source object */
+	double  (*getpleq)(FVECT,OBJREC*);	/* plane equation for surface */
+	double  (*getdisk)(FVECT,OBJREC*);	/* maximum disk for surface */
 } SOBJECT;		/* source object functions */
 
 typedef union {
@@ -142,25 +146,38 @@ extern int  nsources;			/* the number of sources */
 #define  setsource(s,o)		(*sfun[(o)->otype].of->setsrc)(s,o)
 
 					/* 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);
-extern void	direct(RAY *r, void (*f)(), char *p);
+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);
-extern void     srcblocker(RAY *r);
+					/* defined in srcobstr.c */
+extern void	initobscache(int sn);
+extern int	srcblocker(RAY *r);
 extern int      srcblocked(RAY *r);
 extern void     freeobscache(SRCREC *s);
+extern void	markclip(OBJREC *m);
 					/* defined in srcsamp.c */
+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);