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greg |
2.15 |
/* RCSid $Id: source.h,v 2.14 2004/09/08 06:07:52 greg Exp $ */
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greg |
1.1 |
/*
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* source.h - header file for ray tracing sources.
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*
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greg |
2.5 |
* Include after ray.h
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*/
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schorsch |
2.7 |
#ifndef _RAD_SOURCE_H_
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#define _RAD_SOURCE_H_
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schorsch |
2.11 |
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#include <string.h>
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schorsch |
2.7 |
#ifdef __cplusplus
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extern "C" {
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#endif
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schorsch |
2.10 |
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greg |
2.12 |
#ifndef AIMREQT
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greg |
1.6 |
#define AIMREQT 100 /* required aim success/failure */
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greg |
2.12 |
#endif
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#ifndef SHADCACHE
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#define SHADCACHE 20 /* shadow cache resolution */
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#endif
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greg |
1.6 |
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greg |
1.1 |
#define SDISTANT 01 /* source distant flag */
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#define SSKIP 02 /* source skip flag */
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greg |
1.3 |
#define SPROX 04 /* source proximity flag */
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#define SSPOT 010 /* source spotlight flag */
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greg |
1.6 |
#define SVIRTUAL 020 /* source virtual flag */
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#define SFLAT 040 /* source flat flag */
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greg |
1.14 |
#define SCYL 0100 /* source cylindrical flag */
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#define SFOLLOW 0200 /* source follow path flag */
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greg |
1.1 |
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typedef struct {
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greg |
1.6 |
FVECT aim; /* aim direction or center */
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float siz; /* output solid angle or area */
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greg |
2.4 |
float flen; /* focal length (negative if distant source) */
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greg |
1.3 |
} SPOT; /* spotlight */
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typedef struct {
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greg |
2.12 |
union {
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struct {
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FVECT u, v; /* unit vectors */
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} f; /* flat source indexing */
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struct {
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FVECT o; /* origin position */
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RREAL e1, e2; /* 1/extent */
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int ax; /* major direction */
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} d; /* distant source indexing */
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} p; /* indexing parameters */
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OBJECT obs[1]; /* cache obstructors (extends struct) */
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} OBSCACHE; /* obstructor cache */
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typedef struct {
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greg |
1.6 |
int sflags; /* source flags */
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greg |
1.1 |
FVECT sloc; /* direction or position of source */
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greg |
1.14 |
FVECT ss[3]; /* source dimension vectors, U, V, and W */
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float srad; /* maximum source radius */
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float ss2; /* solid angle or projected area */
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greg |
2.12 |
OBJREC *so; /* source destination object */
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greg |
1.6 |
struct {
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greg |
1.3 |
float prox; /* proximity */
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SPOT *s; /* spot */
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} sl; /* localized source information */
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greg |
1.6 |
union {
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greg |
2.3 |
long success; /* successes - AIMREQT*failures */
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greg |
1.12 |
struct {
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short pn; /* projection number */
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greg |
2.3 |
int sn; /* next source to aim for */
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greg |
1.12 |
} sv; /* virtual source */
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greg |
1.6 |
} sa; /* source aiming information */
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greg |
2.8 |
unsigned long
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ntests, nhits; /* shadow tests and hits */
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greg |
2.12 |
#ifdef SHADCACHE
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OBSCACHE *obscache; /* obstructor cache */
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#endif
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greg |
1.2 |
} SRCREC; /* light source */
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greg |
1.1 |
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greg |
1.15 |
#define MAXSPART 64 /* maximum partitions per source */
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greg |
1.14 |
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#define SU 0 /* U vector or partition */
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#define SV 1 /* V vector or partition */
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#define SW 2 /* W vector or partition */
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#define S0 3 /* leaf partition */
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#define snorm ss[SW] /* normal vector for flat source */
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typedef struct {
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int sn; /* source number */
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short np; /* number of partitions */
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short sp; /* this partition number */
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double dom; /* solid angle of partition */
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unsigned char spt[MAXSPART/2]; /* source partitioning */
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} SRCINDEX; /* source index structure */
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#define initsrcindex(s) ((s)->sn = (s)->sp = -1, (s)->np = 0)
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schorsch |
2.10 |
#define clrpart(pt) memset((char *)(pt), '\0', MAXSPART/2)
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greg |
1.14 |
#define setpart(pt,i,v) ((pt)[(i)>>2] |= (v)<<(((i)&3)<<1))
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#define spart(pt,pi) ((pt)[(pi)>>2] >> (((pi)&3)<<1) & 3)
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greg |
1.8 |
/*
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* Special support functions for sources
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*/
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/*
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greg |
1.10 |
* Virtual source materials must define the following.
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greg |
1.8 |
*
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* vproj(pm, op, sp, i) Compute i'th virtual projection
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* of source sp in object op and assign
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* the 4x4 transformation matrix pm.
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* Return 1 on success, 0 if no i'th projection.
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*
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* nproj The number of projections. The value of
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* i passed to vproj runs from 0 to nproj-1.
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*/
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greg |
1.2 |
typedef struct {
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greg |
1.8 |
int (*vproj)(); /* project virtual sources */
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int nproj; /* number of possible projections */
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} VSMATERIAL; /* virtual source material functions */
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greg |
1.4 |
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typedef struct {
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greg |
2.5 |
void (*setsrc)(); /* set light source for object */
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void (*partit)(); /* partition light source object */
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greg |
1.8 |
double (*getpleq)(); /* plane equation for surface */
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double (*getdisk)(); /* maximum disk for surface */
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} SOBJECT; /* source object functions */
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greg |
1.1 |
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greg |
1.8 |
typedef union {
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VSMATERIAL *mf; /* material functions */
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SOBJECT *of; /* object functions */
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} SRCFUNC; /* source functions */
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extern SRCFUNC sfun[]; /* source dispatch table */
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greg |
1.2 |
extern SRCREC *source; /* our source list */
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greg |
1.1 |
extern int nsources; /* the number of sources */
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greg |
1.14 |
#define sflatform(sn,dir) -DOT(source[sn].snorm, dir)
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greg |
1.11 |
#define getplaneq(c,o) (*sfun[(o)->otype].of->getpleq)(c,o)
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#define getmaxdisk(c,o) (*sfun[(o)->otype].of->getdisk)(c,o)
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#define setsource(s,o) (*sfun[(o)->otype].of->setsrc)(s,o)
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greg |
2.5 |
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/* defined in source.c */
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greg |
2.12 |
extern OBJREC *findmaterial(OBJREC *o);
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greg |
2.5 |
extern void marksources(void);
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extern void freesources(void);
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extern int srcray(RAY *sr, RAY *r, SRCINDEX *si);
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extern void srcvalue(RAY *r);
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extern int sourcehit(RAY *r);
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schorsch |
2.13 |
typedef void srcdirf_t(COLOR cv, void *np, FVECT ldir, double omega);
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extern void direct(RAY *r, srcdirf_t *f, void *p);
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greg |
2.5 |
extern void srcscatter(RAY *r);
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extern int m_light(OBJREC *m, RAY *r);
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greg |
2.15 |
extern void initobscache(int sn);
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greg |
2.14 |
extern int srcblocker(RAY *r);
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greg |
2.12 |
extern int srcblocked(RAY *r);
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extern void freeobscache(SRCREC *s);
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greg |
2.5 |
/* defined in srcsamp.c */
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extern double nextssamp(RAY *r, SRCINDEX *si);
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extern int skipparts(int ct[3], int sz[3], int pp[2], unsigned char *pt);
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extern void nopart(SRCINDEX *si, RAY *r);
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extern void cylpart(SRCINDEX *si, RAY *r);
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extern void flatpart(SRCINDEX *si, RAY *r);
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extern double scylform(int sn, FVECT dir);
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/* defined in srcsupp.c */
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extern void initstypes(void);
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extern int newsource(void);
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extern void setflatss(SRCREC *src);
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extern void fsetsrc(SRCREC *src, OBJREC *so);
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extern void ssetsrc(SRCREC *src, OBJREC *so);
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extern void sphsetsrc(SRCREC *src, OBJREC *so);
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extern void rsetsrc(SRCREC *src, OBJREC *so);
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extern void cylsetsrc(SRCREC *src, OBJREC *so);
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extern SPOT *makespot(OBJREC *m);
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extern int spotout(RAY *r, SPOT *s);
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extern double fgetmaxdisk(FVECT ocent, OBJREC *op);
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extern double rgetmaxdisk(FVECT ocent, OBJREC *op);
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extern double fgetplaneq(FVECT nvec, OBJREC *op);
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extern double rgetplaneq(FVECT nvec, OBJREC *op);
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extern int commonspot(SPOT *sp1, SPOT *sp2, FVECT org);
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extern int commonbeam(SPOT *sp1, SPOT *sp2, FVECT org);
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extern int checkspot(SPOT *sp, FVECT nrm);
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extern double spotdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT pos);
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extern double beamdisk(FVECT oc, OBJREC *op, SPOT *sp, FVECT dir);
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extern double intercircle(FVECT cc, FVECT c1, FVECT c2,
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double r1s, double r2s);
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/* defined in virtuals.c */
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extern void markvirtuals(void);
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extern void addvirtuals(int sn, int nr);
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extern void vproject(OBJREC *o, int sn, int n);
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extern OBJREC *vsmaterial(OBJREC *o);
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extern int makevsrc(OBJREC *op, int sn, MAT4 pm);
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extern double getdisk(FVECT oc, OBJREC *op, int sn);
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extern int vstestvis(int f, OBJREC *o, FVECT oc, double or2, int sn);
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extern void virtverb(int sn, FILE *fp);
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schorsch |
2.7 |
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#ifdef __cplusplus
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}
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greg |
2.5 |
#endif
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schorsch |
2.7 |
#endif /* _RAD_SOURCE_H_ */
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